JP6969479B2 - Fast-hardening semi-flexible pavement injection material and injection milk using it - Google Patents
Fast-hardening semi-flexible pavement injection material and injection milk using it Download PDFInfo
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- 239000007924 injection Substances 0.000 title claims description 132
- 238000002347 injection Methods 0.000 title claims description 132
- 235000013336 milk Nutrition 0.000 title claims description 118
- 210000004080 milk Anatomy 0.000 title claims description 118
- 239000008267 milk Substances 0.000 title claims description 112
- 239000000463 material Substances 0.000 title claims description 102
- 239000010881 fly ash Substances 0.000 claims description 90
- 239000000203 mixture Substances 0.000 claims description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000000843 powder Substances 0.000 claims description 31
- 239000011398 Portland cement Substances 0.000 claims description 24
- 239000002518 antifoaming agent Substances 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 17
- 238000005345 coagulation Methods 0.000 claims description 15
- 230000015271 coagulation Effects 0.000 claims description 15
- 238000001179 sorption measurement Methods 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229960000907 methylthioninium chloride Drugs 0.000 claims description 9
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 7
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 5
- 239000011440 grout Substances 0.000 claims description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 claims 1
- 239000010426 asphalt Substances 0.000 description 51
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 42
- 229910052799 carbon Inorganic materials 0.000 description 42
- 239000002245 particle Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 22
- 230000000694 effects Effects 0.000 description 19
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- 239000004568 cement Substances 0.000 description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 238000002156 mixing Methods 0.000 description 13
- 230000007423 decrease Effects 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 9
- XQAXGZLFSSPBMK-UHFFFAOYSA-M [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium;chloride;trihydrate Chemical compound O.O.O.[Cl-].C1=CC(=[N+](C)C)C=C2SC3=CC(N(C)C)=CC=C3N=C21 XQAXGZLFSSPBMK-UHFFFAOYSA-M 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 8
- 235000019738 Limestone Nutrition 0.000 description 7
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- 239000000654 additive Substances 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 239000012798 spherical particle Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 239000002562 thickening agent Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229910052806 inorganic carbonate Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 206010016807 Fluid retention Diseases 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229940044172 calcium formate Drugs 0.000 description 1
- 239000004281 calcium formate Substances 0.000 description 1
- 235000019255 calcium formate Nutrition 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000006103 coloring component Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 fatty acid esters Chemical class 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000011181 potassium carbonates Nutrition 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Description
本発明は、速硬型半たわみ性舗装用注入材およびそれを用いた注入ミルクに関するものである。 The present invention relates to a quick-hardening semi-flexible pavement injection material and an injection milk using the same.
半たわみ性舗装とは、空隙率の大きい開粒度アスファルト混合物の空隙に、セメントを含むスラリー状の半たわみ性舗装用注入ミルクを注入して、硬化させることによって形成される舗装である。半たわみ性舗装用注入ミルクは、セメントを含む半たわみ性舗装用注入材と水とを混合して調製した混合物であり、セメントミルクとも呼ばれている。半たわみ性舗装は、アスファルト舗装が持つたわみ性と、コンクリート舗装が持つ剛性とを併せ持ち耐わだち掘れ性に優れている。また、半たわみ性舗装は、アスファルト舗装と比較して明色性に優れている。このため、半たわみ性舗装は、コンテナヤード、重交通道路、バスレーンやバス停流所、交差点、サービスエリアの駐車エリア等の舗装に利用されている。 The semi-flexible pavement is a pavement formed by injecting a slurry-like infused milk for semi-flexible pavement containing cement into the voids of an open-grained asphalt mixture having a large void ratio and hardening the pavement. Semi-flexible pavement injection milk is a mixture prepared by mixing a semi-flexible pavement injection material containing cement with water, and is also called cement milk. Semi-flexible pavement has both the flexibility of asphalt pavement and the rigidity of concrete pavement, and is excellent in rutting resistance. In addition, the semi-flexible pavement is superior in lightness to the asphalt pavement. For this reason, semi-flexible pavement is used for pavement of container yards, heavy traffic roads, bus lanes and bus stops, intersections, parking areas in service areas, and the like.
社団法人日本道路協会発行の「アスファルト舗装要綱」によれば、半たわみ性舗装用注入材は、材齢７日圧縮強度の標準的な値が９．８〜２９．４Ｎ／ｍｍ２とされている。ポルトランドセメントを半たわみ性舗装用注入材として単独で使用すると、材齢７日圧縮強度が前記の上限値２９．４Ｎ／ｍｍ２を超えてしまう。このため、半たわみ性舗装用注入材では、材齢７日圧縮強度が標準的な値となるように、混合材を添加している。混合材としては、石灰石微粉末、高炉スラグ微粉末、フライアッシュなどが利用されている。 According to the "Asphalt Pavement Guidelines" issued by the Japan Road Association, the standard value of compressive strength for semi-flexible pavement is 9.8 to 29.4 N / mm 2. There is. When Portland cement is used alone as an injection material for semi-flexible pavement, the 7-day-old compressive strength exceeds the above upper limit of 29.4 N / mm 2 . For this reason, in the semi-flexible pavement injection material, a mixed material is added so that the compressive strength at 7 days of age becomes a standard value. As the mixed material, limestone fine powder, blast furnace slag fine powder, fly ash and the like are used.
特許文献１には、セメントと、少なくとも２種類以上の低炭素性材料（シラス、シラスバルーン、ガラスバルーン、バイオマスボイラ灰、フライアッシュ、シリカフューム、硫酸リチウム、ギ酸カルシウム、高性能減水剤、高炉スラグ等）とを含有したセメント系混合材を、半たわみ性舗装用注入材として用いることが開示されている。
特許文献２には、セメント、フライアッシュ、硅砂、再乳化性粉体ポリマーおよび所望により粉体添加剤を含むセメント組成物を、半たわみ性舗装用注入材として用いることが開示されている。この特許文献２には、粉体添加剤として、減水剤、流動化材、消泡剤が記載されている。さらに、この特許文献２には、流動性を改善する目的でフライアッシュをセメントに対して１５〜７０重量部混和することが記載されている。
特許文献３には、セメントとフライアッシュと珪砂と再乳化性粉体樹脂と粉体添加物が所定の割合で均一に混合して調製された半たわみ性舗装用一粉型ポリマーセメント組成物に、石灰石微粉末、石灰石骨材、収縮低減剤を添加することが開示されている。この特許文献３には、粉体添加物として、減水剤、消泡剤、増粘剤が記載されている。
Patent Document 1 describes cement and at least two or more types of low carbon materials (silus, silus balloon, glass balloon, biomass boiler ash, fly ash, silica fume, lithium sulfate, calcium formate, high-performance water reducing agent, blast furnace slag, etc.). It is disclosed that a cement-based mixed material containing) and is used as an injection material for semi-flexible pavement.
Patent Document 2 discloses that a cement composition containing cement, fly ash, silica sand, a reemulsifying powder polymer and optionally a powder additive is used as a semi-flexible pavement injection material. This Patent Document 2 describes a water reducing agent, a fluidizing material, and a defoaming agent as powder additives. Further, Patent Document 2 describes that fly ash is miscible with cement in an amount of 15 to 70 parts by weight for the purpose of improving fluidity.
Patent Document 3 describes a semi-flexible one-powder polymer cement composition for pavement prepared by uniformly mixing cement, fly ash, silica sand, reemulsifying powder resin, and powder additive in a predetermined ratio. , A limestone fine powder, a limestone aggregate, and a shrinkage reducing agent are disclosed. This Patent Document 3 describes a water reducing agent, a defoaming agent, and a thickening agent as powder additives.
また、半たわみ性舗装では施工場所によっては、早期に交通を開放することが要求されることがある。このような場合は、短時間で硬化が始まって強度を発現する速硬型の半たわみ性舗装用注入ミルクが用いられる。速硬型半たわみ性舗装用注入ミルクとしては、半たわみ性舗装用注入ミルクに速硬性混和材を添加したもの、セメントに超速硬セメントを用いたものが知られている。 In addition, semi-flexible pavement may require early opening of traffic depending on the construction site. In such a case, a quick-hardening semi-flexible pavement-injected milk that starts to cure in a short time and develops strength is used. As the quick-hardening type semi-flexible pavement-injected milk, one in which a quick-hardening admixture is added to the semi-flexible pavement-injected milk and one in which ultra-fast-hardening cement is used as the cement are known.
例えば、特許文献４には、速硬性混和材として、カルシウムアルミネートと無水石膏と凝結調整剤とを含み、前記カルシウムアルミネート１００質量部に対して、前記無水石膏を５０質量部以上２００質量部以下の範囲にて含み、前記凝結調整剤を０．１質量部以上１０質量部以下の範囲にて含む組成物が開示されている。
また、特許文献５には、超速硬セメント、２０μｍ以下に分級されたフライアッシュ、高性能減水剤、リグニン系遅延剤およびオキシカルボン酸系遅延剤を所定の割合で配合した開粒度混合物用注入材が開示されている。この特許文献５によれば、フライアッシュは注入材の流動性を向上させ、材料分離による注入後の半たわみ性構造体の沈下を防止する作用を有し、特に２０μｍ以下に分級されたフライアッシュは、既設の開粒度混合物への良好な浸透性を確保するために好適であるとされている。
For example, Patent Document 4 contains calcium aluminate, anhydrous gypsum, and a coagulation adjuster as a fast-curing admixture, and 50 parts by mass or more and 200 parts by mass of the anhydrous gypsum with respect to 100 parts by mass of the calcium aluminate. A composition containing the coagulation adjuster in the range of 0.1 parts by mass or more and 10 parts by mass or less is disclosed.
Further, in Patent Document 5, an injection material for an open particle size mixture containing ultrafast hard cement, fly ash classified to 20 μm or less, a high-performance water reducing agent, a lignin-based retarder and an oxycarboxylic acid-based retarder in a predetermined ratio. Is disclosed. According to Patent Document 5, fly ash has the effect of improving the fluidity of the injection material and preventing the sinking of the semi-flexible structure after injection due to material separation, and in particular, the fly ash classified to 20 μm or less. Is said to be suitable for ensuring good permeability to existing open particle size mixtures.
ところで、速硬型の半たわみ性舗装用注入ミルクでは、強度が発現する前（即ち、硬化が始まる前）に開粒度アスファルト混合物の空隙に注入できるように、流動性が高いことが望まれる。また、半たわみ性舗装用注入ミルクを開粒度アスファルト混合物の空隙に注入して形成した舗装体は、色むらが発生しにくく、見栄えがよいことが好ましい。
特許文献２、５に記載されているように、フライアッシュは、半たわみ性舗装用注入ミルクの流動性を向上させる作用がある。しかしながら、フライアッシュは、石炭火力発電所のボイラ内での石炭の燃焼によって生じたものであり、石炭由来の未燃カーボンが残留していることが多い。このため、フライアッシュを含む半たわみ性舗装用注入ミルクを、開粒度アスファルト混合物の空隙に注入して形成した舗装体は、未燃カーボンの浮き上がりによる黒斑が発生しやすいという問題がある。コンクリート用フライアッシュの品質は、ＪＩＳ Ａ ６２０１で規定されおり、例えば、フライアッシュII種では、未燃カーボン量の指標となる強熱減量が５．０％以下とされている。しかしながら、本発明者の検討によると、このII種のフライアッシュを用いた半たわみ性舗装用注入ミルクを開粒度アスファルト混合物の空隙に注入した舗装体においても、未燃カーボンに起因する黒斑が発生しやすい傾向があった。
By the way, it is desired that the quick-hardening semi-flexible pavement-injected milk has high fluidity so that it can be injected into the voids of the open-grained asphalt mixture before the strength is developed (that is, before the curing starts). Further, it is preferable that the pavement formed by injecting the semi-flexible pavement-injected milk into the voids of the open-grained asphalt mixture is less likely to cause color unevenness and has a good appearance.
As described in Patent Documents 2 and 5, fly ash has an effect of improving the fluidity of semi-flexible paving infused milk. However, fly ash is produced by the combustion of coal in the boiler of a coal-fired power plant, and unburned carbon derived from coal often remains. Therefore, the pavement formed by injecting semi-flexible pavement-injected milk containing fly ash into the voids of the open-grained asphalt mixture has a problem that black spots are likely to occur due to the floating of unburned carbon. The quality of fly ash for concrete is specified in JIS A 6201. For example, in fly ash type II, the ignition loss, which is an index of the amount of unburned carbon, is set to 5.0% or less. However, according to the study of the present inventor, even in the pavement in which the semi-flexible pavement injection milk using this type II fly ash is injected into the voids of the open-grained asphalt mixture, black spots due to unburned carbon are formed. It tended to occur easily.
この発明は、前述した事情に鑑みてなされたものであって、その目的は、短時間で強度を発現することができ、かつ流動性が高く、強度が発現する前に開粒度アスファルト混合物の空隙に注入することができ、さらに開粒度アスファルト混合物の空隙に注入して形成した舗装体は黒斑が発生しにくい速硬型半たわみ性舗装用注入ミルクおよびその速硬型半たわみ性舗装用注入ミルクの原料として有利に用いることができる速硬型半たわみ性舗装用注入材を提供することにある。 The present invention has been made in view of the above-mentioned circumstances, and an object thereof is that the strength can be developed in a short time, the fluidity is high, and the voids of the open-grained asphalt mixture before the strength is developed. The pavement formed by injecting into the voids of the open-grained asphalt mixture is less likely to cause black spots. It is an object of the present invention to provide a quick-hardening semi-flexible pavement injection material which can be advantageously used as a raw material for milk.
上記の課題を解決するために、本発明の速硬型半たわみ性舗装用注入材は、ポルトランドセメント、速硬性混和材、細骨材、フライアッシュ、再乳化粉末樹脂、消泡剤、凝結調整剤を含む速硬型半たわみ性舗装用注入材であって、前記ポルトランドセメントと速硬性混和材の合計量１００質量部に対する前記フライアッシュの含有量が５質量部以上７０質量部以下の範囲内にあり、前記フライアッシュは、ハンター表色系におけるＬ値が５０．０以上であって、強熱減量が４．０質量％以下であり、メチレンブルー吸着量が０．８０ｍｇ／ｇ以下であって、分級精度指数к（Ｄ２５／Ｄ７５）が０．６以上０．７以下の範囲内にあることを特徴としている。 In order to solve the above problems, the injection material for fast-hardening semi-flexible pavement of the present invention includes Portland cement, quick-hardening admixture, fine aggregate, fly ash, re-emulsified powder resin, defoaming agent, and condensation adjustment. It is a quick-hardening semi-flexible pavement injection material containing an agent, and the content of the fly ash is within the range of 5 parts by mass or more and 70 parts by mass or less with respect to 100 parts by mass of the total amount of the Portland cement and the fast-hardening admixture. to Yes, the fly ash is a by L value in Hunter color system is 50.0 or more, the loss on ignition is less 4.0 wt%, methylene blue adsorption amount Tsu der below 0.80 mg / g Te, classification precision index к (D25 / D75) is characterized by near Rukoto the range of 0.6 to 0.7.
本発明の速硬型半たわみ性舗装用注入材によれば、速硬性混和材を含むので、短時間で強度を発現することができ、比較的短時間で交通開放が可能な注入ミルクを調製することができる。また、ポルトランドセメントと速硬性混和材の合計量１００質量部に対するフライアッシュの含有量が５質量部以上７０質量部以下の範囲内にあるので、流動性が高く、硬化が始まる前に開粒度アスファルト混合物の空隙に注入しやすい注入ミルクを調製することができる。さらに、フライアッシュは、ハンター表色系におけるＬ値が５０．０以上、強熱減量が４．０質量％以下、メチレンブルー吸着量が０．８０ｍｇ／ｇ以下の３つの要件を満足しているので、未燃カーボンが浮き上がりにくい。このため、この速硬型半たわみ性舗装用注入材を用いて調製した注入ミルクを使用した舗装体は、未燃カーボンの浮き上がりによる黒斑が発生しにくくなる。 According to the fast-hardening semi-flexible pavement injection material of the present invention, since the quick-hardening admixture is contained, the strength can be developed in a short time, and the injection milk capable of opening the traffic in a relatively short time can be prepared. can do. In addition, since the content of fly ash is within the range of 5 parts by mass or more and 70 parts by mass or less with respect to the total amount of 100 parts by mass of Portland cement and the fast-hardening admixture, the fluidity is high and the open particle size asphalt is before hardening starts. Infused milk can be prepared that is easy to inject into the voids of the mixture. Furthermore, fly ash satisfies the three requirements of L value of 50.0 or more, ignition loss of 4.0% by mass or less, and methylene blue adsorption amount of 0.80 mg / g or less in the hunter color system. , Unburned carbon is hard to lift up. Therefore, in the pavement body using the injected milk prepared by using this quick-hardening semi-flexible pavement injection material, black spots due to the floating of unburned carbon are less likely to occur.
ここで、本発明の速硬型半たわみ性舗装用注入材において、前記フライアッシュは、４５μｍふるい残分が１質量％以上１０質量％以下の範囲内にあって、ブレーン比表面積が３５００ｃｍ２／ｇ以上であることが好ましい。
この場合、フライアッシュは微細で、粒度分布が狭いので、流動性がより高く、開粒度アスファルト混合物の空隙により注入しやすい注入ミルクを調製することができる。
Here, in the rapid-type semi-flexible paving grout of the present invention, the fly ash, 45 [mu] m sieve residue is within the range of 10 wt% or less than 1 wt%, blanking lane specific surface area of 3500 cm 2 It is preferably / g or more.
In this case, since the fly ash is fine and the particle size distribution is narrow, it is possible to prepare an infused milk which has higher fluidity and is easier to inject due to the voids of the open particle asphalt mixture.
また、本発明の速硬型半たわみ性舗装用注入材において、前記速硬性混和材は、カルシウムアルミネートと無水石膏とを含む組成物であることが好ましい。
この場合、速硬性混和材は上記の成分を含むので、短時間で強度を発現する注入ミルクを調製することができる。
Further, in the quick-hardening semi-flexible pavement injection material of the present invention, the quick-hardening admixture is preferably a composition containing calcium aluminate and anhydrous gypsum.
In this case, since the fast-curing admixture contains the above-mentioned components, it is possible to prepare an injected milk that develops strength in a short time.
また、本発明の速硬型半たわみ性舗装用注入材においては、前記ポルトランドセメントと速硬性混和材の合計量１００質量部に対して、前記細骨材の含有量が５質量部以上５０質量部以下の範囲内、前記再乳化粉末樹脂の含有量が１．０質量部以上２０．０質量部以下の範囲内、前記消泡剤の含有量が０．０５質量部以上３．０質量部以下の範囲内、前記凝結調整剤の含有量が０．１質量部以上１０質量部以下の範囲内にあることが好ましい。
この場合、細骨材、再乳化粉末樹脂、消泡剤、凝結調整剤の含有量が上記の範囲にあることによって、これら添加物の各作用が有効に作用するので、流動性がさらに高く、開粒度アスファルト混合物の空隙にさらに注入しやすい注入ミルクを調製することができる。
Further, in the quick-hardening semi-flexible pavement injection material of the present invention, the content of the fine aggregate is 5 parts by mass or more and 50% by mass with respect to 100 parts by mass of the total amount of the Portland cement and the quick-hardening admixture. Within the range of 1 part or less, the content of the re-emulsified powder resin is within the range of 1.0 part by mass or more and 20.0 parts by mass or less, and the content of the defoaming agent is 0.05 part by mass or more and 3.0 parts by mass. Within the following range, the content of the coagulation adjusting agent is preferably in the range of 0.1 parts by mass or more and 10 parts by mass or less.
In this case, when the contents of the fine aggregate, the re-emulsified powder resin, the defoaming agent, and the coagulation adjusting agent are in the above range, each action of these additives works effectively, so that the fluidity is further high. Infused milk can be prepared that is easier to inject into the voids of the open particle asphalt mixture.
本発明の速硬型半たわみ性舗装用注入ミルクは、上述の速硬型半たわみ性舗装用注入材と水とを含み、前記速硬型半たわみ性舗装用注入材１００質量部に対する前記水の含有量が３８質量部以上６０質量部以下の範囲内にあることを特徴としている。
本発明の速硬型半たわみ性舗装用注入ミルクによれば、上述の速硬型半たわみ性舗装用注入材と水とを上記の範囲で含むので、短時間で強度を発現することができる。また、流動性が高く、強度が発現する前に開粒度アスファルト混合物の空隙に注入することができる。さらに、未燃カーボンが浮き上がりにくいので、この半たわみ性舗装用注入ミルクを使用した舗装体は、未燃カーボンの浮き上がりによる黒斑が発生しにくくなる。
The quick-hardening semi-flexible pavement injection milk of the present invention contains the above-mentioned quick-hardening semi-flexible pavement injection material and water, and the water with respect to 100 parts by mass of the fast-hardening semi-flexible pavement injection material. The content of the water is in the range of 38 parts by mass or more and 60 parts by mass or less.
According to the fast-hardening semi-flexible pavement injection milk of the present invention, since the above-mentioned quick-hardening semi-flexible pavement injection material and water are contained in the above range, strength can be developed in a short time. .. It is also highly fluid and can be injected into the voids of the open particle asphalt mixture before it develops strength. Further, since the unburned carbon is hard to lift up, the pavement using this semi-flexible pavement-injected milk is less likely to generate black spots due to the lift-up of the unburned carbon.
ここで、本発明の速硬型半たわみ性舗装用注入ミルクにおいては、粘度が１５０ｍＰａ・ｓ以上６００ｍＰａ・ｓ以下の範囲内にあることが好ましい。
この場合、開粒度アスファルト混合物の空隙にさらに注入しやすく、ブリーディングが発生しにくくなるので、舗装体の滑り抵抗性が高くなる。
Here, in the fast-hardening semi-flexible pavement-injected milk of the present invention, the viscosity is preferably in the range of 150 mPa · s or more and 600 mPa · s or less.
In this case, it is easier to inject into the voids of the open-grained asphalt mixture, and bleeding is less likely to occur, so that the slip resistance of the pavement is increased.
本発明によれば、短時間で強度を発現することができ、かつ流動性が高く、強度が発現する前に開粒度アスファルト混合物の空隙に注入することができ、さらに開粒度アスファルト混合物の空隙に注入して形成した舗装体は黒斑が発生しにくい速硬型半たわみ性舗装用注入ミルクおよびその速硬型半たわみ性舗装用注入ミルクの原料として有利に用いることができる速硬型半たわみ性舗装用注入材を提供することが可能となる。 According to the present invention, the strength can be developed in a short time, the fluidity is high, and the asphalt mixture can be injected into the voids of the open-grained asphalt mixture before the strength is developed, and further into the voids of the open-grained asphalt mixture. The pavement formed by injection is a fast-hardening semi-flexible pavement injection milk that is less likely to cause black spots and a quick-hardening semi-flexible pavement injection milk that can be advantageously used as a raw material for the quick-hardening semi-flexible pavement injection milk. It becomes possible to provide an injection material for sex pavement.
以下、本発明の一実施形態である速硬型半たわみ性舗装用注入材、および速硬型半たわみ性舗装用注入ミルクについて説明する。 Hereinafter, the quick-hardening semi-flexible pavement injection material and the quick-hardening semi-flexible pavement injection milk, which are one embodiments of the present invention, will be described.
［速硬型半たわみ性舗装用注入材］
本実施形態の速硬型半たわみ性舗装用注入材は、ポルトランドセメント、速硬性混和材、細骨材、フライアッシュ、再乳化粉末樹脂、消泡剤、凝結調整剤を含む粉末状の組成物である。速硬型半たわみ性舗装用注入材は、水と混練してスラリー状の速硬型半たわみ性舗装用注入ミルクを調製するための原料として用いられる。
[Fast-hardening semi-flexible pavement injection material]
The quick-hardening semi-flexible pavement injection material of the present embodiment is a powdery composition containing Portland cement, quick-hardening admixture, fine aggregate, fly ash, re-emulsifying powder resin, defoaming agent, and coagulation adjuster. Is. The quick-hardening semi-flexible pavement injection material is used as a raw material for preparing a slurry-like quick-hardening semi-flexible pavement injection milk by kneading with water.
（ポルトランドセメント）
ポルトランドセメントには特に制限はなく、半たわみ性舗装用注入材のセメント源として利用されている公知のポルトランドセメントを用いることができる。ポルトランドセメントとしては、例えば、普通ポルトランドセメント、早強ポルトランドセメント、超早強ポルトランドセメント、中庸熱ポルトランドセメント、低熱ポルトランドセメントを用いることができる。
(Portland cement)
The Portland cement is not particularly limited, and known Portland cement used as a cement source for semi-flexible pavement injection materials can be used. As the Portland cement, for example, ordinary Portland cement, early-strength Portland cement, ultra-early-strength Portland cement, moderate heat Portland cement, and low heat Portland cement can be used.
（速硬性混和材）
速硬性混和材は、速硬型半たわみ性舗装用注入ミルクの凝結始発時間および凝結終結時間を短くするための混和材である。速硬性混和材は、カルシウムアルミネートと石膏とを含む組成物であることが好ましい。カルシウムアルミネートは、１２ＣａＯ・７Ａｌ２Ｏ３、１１ＣａＯ・７Ａｌ２Ｏ３・ＣａＦ２およびＣａＯ・Ａｌ２Ｏ３のうちの１つ以上の化合物を含み、ガラス化率が８０％以上であるものが好ましい。速硬性混和材は、カルシウムアルミネート１００質量部に対して、無水石膏を５０質量部以上２００質量部以下の範囲内で含むことが好ましい。
(Fast-hardening admixture)
The fast-hardening admixture is an admixture for shortening the condensation start time and the condensation end time of the fast-hardening semi-flexible pavement-injected milk. The fast-curing admixture is preferably a composition containing calcium aluminate and gypsum. Calcium aluminate contains one or more compounds of 12CaO ・ 7Al 2 O 3 , 11CaO ・ 7Al 2 O 3・ CaF 2 and CaO ・ Al 2 O 3 and has a vitrification rate of 80% or more. preferable. The quick-curing admixture preferably contains anhydrous gypsum in a range of 50 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of calcium aluminate.
ポルトランドセメントと速硬性混和材の含有量比は、目的とする速硬型半たわみ性舗装用注入ミルクの凝結時間によって変動するが、一般に、質量比で３０：７０〜７０：３０の範囲にある。 The content ratio of Portland cement to the fast-hardening admixture varies depending on the setting time of the target fast-hardening semi-flexible pavement infused milk, but is generally in the range of 30:70 to 70:30 by mass ratio. ..
（フライアッシュ）
フライアッシュは、石炭火力発電所のボイラ内での石炭の燃焼によって生じた石炭灰の粒子が相互に凝集して生成した粒状物である。フライアッシュは、一般に粒子形状が球状で、その球状粒子によるボールベアリング効果により速硬型半たわみ性舗装用注入ミルクの流動性を向上させる作用がある。速硬型半たわみ性舗装用注入材のフライアッシュの含有量は、ポルトランドセメントと速硬性混和材の合計量１００質量部に対して５質量部以上７０質量部以下の範囲内であり、さらに好ましくは、１０質量部以上５０質量部以下の範囲内にある。フライアッシュの含有量が５質量部未満の速硬型半たわみ性舗装用注入材を用いて調製した注入ミルクは、上記の流動性の向上効果が発揮されにくく、ブリーディングが発生しやすくなり、開粒度アスファルト混合物への注入率が低下するおそれがある。一方、フライアッシュの含有量が７０質量部を超える速硬型半たわみ性舗装用注入材を用いて調製した注入ミルクは、粘度が高くなり、開粒度アスファルト混合物への注入率が低下するおそれがある。
フライアッシュは、ハンター表色系におけるＬ値、強熱減量、メチレンブルー吸着量、４５μｍふるい残分、分級精度指数ｋ（Ｄ２５／Ｄ７５）、ブレーン比表面積が所定の値とされている。
(Fly ash)
Fly ash is a granular material produced by the mutual aggregation of coal ash particles produced by the combustion of coal in the boiler of a coal-fired power plant. Fly ash generally has a spherical particle shape, and has the effect of improving the fluidity of the fast-hardening semi-flexible pavement-injected milk due to the ball bearing effect of the spherical particles. The content of fly ash in the injection material for quick-hardening semi-flexible pavement is in the range of 5 parts by mass or more and 70 parts by mass or less with respect to 100 parts by mass of the total amount of Portland cement and the quick-hardening admixture, which is more preferable. Is in the range of 10 parts by mass or more and 50 parts by mass or less. Infused milk prepared using a fast-hardening semi-flexible pavement injection material with a fly ash content of less than 5 parts by mass is less likely to exhibit the above-mentioned effect of improving fluidity, and bleeding is likely to occur, resulting in opening. The rate of injection into the particle size asphalt mixture may decrease. On the other hand, the injected milk prepared by using the fast-hardening semi-flexible pavement injection material having a fly ash content of more than 70 parts by mass may have a high viscosity and a decrease in the injection rate into the open-grained asphalt mixture. be.
For fly ash, the L value, ignition loss, methylene blue adsorption amount, 45 μm sieve residue, classification accuracy index k (D25 / D75), and brain specific surface area in the hunter color system are set to predetermined values.
ハンター表色系におけるＬ値は、一般に明度を表す。未燃カーボンを含まないフライアッシュは固有のＬ値を持つが、黒色の未燃カーボンのＬ値はほぼ０であるため、未燃カーボンを含むフライアッシュのＬ値は、フライアッシュの未燃カーボンの含有量と相関すると考えられる。すなわち、Ｌ値が低い（明度が低い＝黒色に近い）ことは、フライアッシュの未燃カーボンの含有量が多いことの指標になると考えられる。このため、本実施形態では、Ｌ値は５０．０以上とされている。Ｌ値は、５４．０以上であることがさらに好ましい。 The L value in the hunter color system generally represents lightness. Fly ash that does not contain unburned carbon has a unique L value, but since the L value of black unburned carbon is almost 0, the L value of fly ash that contains unburned carbon is the unburned carbon of fly ash. It is considered to correlate with the content of. That is, a low L value (low brightness = close to black) is considered to be an indicator that the content of unburned carbon in fly ash is high. Therefore, in this embodiment, the L value is set to 50.0 or more. The L value is more preferably 54.0 or more.
強熱減量は、フライアッシュを９７５±２５℃に調節した電気炉で強熱したときの減量であり、ＪＩＳ Ａ ６２０１（コンクリート用フライアッシュ）に準拠した方法により測定した値である。未燃カーボンは通常９７５℃までの温度で燃焼するので、強熱減量は、フライアッシュの未燃カーボンの含有量と相関すると考えられる。すなわち、強熱減量が多いことは、フライアッシュの未燃カーボンの含有量が多いことの指標になると考えられる。このため、本実施形態では、強熱減量は４．０質量％以下とされている。強熱減量は、３．０質量％以下であることが好ましい。 The ignition loss is the weight loss when the fly ash is ignited in an electric furnace adjusted to 975 ± 25 ° C., and is a value measured by a method based on JIS A 6201 (fly ash for concrete). Since unburned carbon normally burns at temperatures up to 975 ° C., ignition loss is thought to correlate with the content of unburned carbon in fly ash. That is, a large amount of ignition loss is considered to be an indicator of a large content of unburned carbon in fly ash. Therefore, in this embodiment, the ignition loss is 4.0% by mass or less. The ignition loss is preferably 3.0% by mass or less.
メチレンブルー吸着量（ＭＢ吸着量）は、セメント協会標準試験方法ＪＣＡＳ Ｉ−６１：２００８（フライアッシュのメチレンブルー吸着量 試験方法）に準拠した方法により測定した値である。メチレンブルーは炭素に吸着しやすいため、ＭＢ吸着量は、フライアッシュの未燃カーボンの含有量と相関すると考えられる。すなわち、ＭＢ吸着量が多いことは、フライアッシュの未燃カーボンの含有量が多いことの指標になると考えられる。このため、本実施形態では、ＭＢ吸着量は０．８ｍｇ／ｇ以下とされている。ＭＢ吸着量は、０．７５ｍｇ／ｇ以下であることが好ましい。 The methylene blue adsorption amount (MB adsorption amount) is a value measured by a method based on the Cement Association standard test method JCAS I-61: 2008 (fly ash methylene blue adsorption amount test method). Since methylene blue is easily adsorbed on carbon, the amount of MB adsorbed is considered to correlate with the content of unburned carbon in fly ash. That is, a large amount of MB adsorbed is considered to be an index of a large amount of unburned carbon in fly ash. Therefore, in this embodiment, the amount of MB adsorbed is 0.8 mg / g or less. The amount of MB adsorbed is preferably 0.75 mg / g or less.
ただし、Ｌ値は未燃カーボン以外の着色成分の混入によって変動する。強熱減量は未燃カーボン以外の可燃物の燃焼や水和物の脱水や炭酸塩の脱炭酸などによって変動する。ＭＢ吸着量は、未燃カーボン以外のメチレンブルーを吸着する多孔質物質の混入によって変動する。よって、Ｌ値、強熱減量およびＭＢ吸着量の各測定値からでは、フライアッシュの未燃カーボンの量を単純に推定することはできない。このため、本実施形態では、Ｌ値、強熱減量およびＭＢ吸着量の各測定値の全てが上記の数値を満足するフライアッシュを用いている。 However, the L value varies depending on the mixing of coloring components other than unburned carbon. Ignition loss varies due to combustion of combustibles other than unburned carbon, dehydration of hydrates, and decarboxylation of carbonates. The amount of MB adsorbed varies depending on the mixing of a porous substance that adsorbs methylene blue other than unburned carbon. Therefore, the amount of unburned carbon in fly ash cannot be simply estimated from the measured values of L value, ignition loss and MB adsorption amount. Therefore, in the present embodiment, fly ash is used in which all the measured values of the L value, the ignition loss and the MB adsorption amount satisfy the above values.
４５μｍふるい残分は、ＪＩＳ Ａ ６２０１（コンクリート用フライアッシュ）に準拠した方法により測定した値である。
４５μｍふるい残分が１０質量％を超える、すなわち粗いフライアッシュ粒子が多くなりすぎるとフライアッシュの球状粒子によるボールベアリング効果が低下し、速硬型半たわみ性舗装用注入ミルクの流動性が低下するとともにブリーディング率が高くなるおそれがある。一方、４５μｍふるい残分が１質量％未満になる、すなわち４５μｍ以下の微細なフライアッシュ粒子が多くなりすぎると凝集粒子を形成しやすくなり、速硬型半たわみ性舗装用注入ミルクの流動性が低下するおそれがある。また、石炭火力発電所のボイラ内で生成するフライアッシュは一般に粒度分布が広いため、４５μｍふるい残分が１質量％未満となるように分級条件を設定すると、分級効率が低下し、フライアッシュの生産性が低くなる場合がある。
このため、本実施形態では、４５μｍふるい残分を１質量％以上１０質量％以下の範囲内とされている。
The 45 μm sieve residue is a value measured by a method according to JIS A 6201 (fly ash for concrete).
If the 45 μm sieve residue exceeds 10% by mass, that is, if the amount of coarse fly ash particles is too large, the ball bearing effect due to the spherical particles of fly ash is reduced, and the fluidity of the fast-hardening semi-flexible pavement injection milk is reduced. At the same time, the bleeding rate may increase. On the other hand, if the residual amount of the 45 μm sieve is less than 1% by mass, that is, if the amount of fine fly ash particles of 45 μm or less is too large, agglomerated particles are likely to be formed, and the fluidity of the quick-hardening semi-flexible pavement injection milk becomes low. It may decrease. In addition, since the fly ash produced in the boiler of a coal-fired power plant generally has a wide particle size distribution, if the classification conditions are set so that the 45 μm sieve residue is less than 1% by mass, the classification efficiency decreases and the fly ash Productivity may be low.
Therefore, in the present embodiment, the 45 μm sieve residue is set to be within the range of 1% by mass or more and 10% by mass or less.
分級精度指数к（Ｄ２５／Ｄ７５）は、フライアッシュの部分分級効率曲線において、部分分級効率が２５％となるときの粒径（Ｄ２５、単位：μｍ）と部分分級効率が７５％となるときの粒径（Ｄ７５、単位：μｍ）との比であり、下記の式により求められる値である。
к＝Ｄ２５／Ｄ７５
The classification accuracy index к (D25 / D75) is the particle size (D25, unit: μm) when the partial classification efficiency is 25% and the partial classification efficiency when the partial classification efficiency is 75% in the fly ash partial classification efficiency curve. It is a ratio with the particle size (D75, unit: μm), and is a value obtained by the following formula.
к = D25 / D75
分級精度指数κは１に近いほど、粒度分布が狭く、粒径が揃っていることを意味する。
フライアッシュは、ある程度粒度分布が狭く、粒径が揃っている方が、球状粒子によるボールベアリング効果による流動性改善効果が高くなるので好ましい。分級精度指数кが０．６未満になると、ボールベアリング効果が低下して、速硬型半たわみ性舗装用注入ミルクの流動性が低下するおそれがある。一方、分級精度指数кが０．７を超えると粒度分布が狭くなりすぎるため、微細なフライアッシュ粒子が極端に減少し、速硬型半たわみ性舗装用注入ミルクの開粒度アスファルト混合物への注入率が低下するおそれがある。また、石炭火力発電所のボイラ内で生成するフライアッシュは一般に粒度分布が広いため、分級精度指数κが０．７を超えるように分級条件を設定すると、分級効率が低下し、フライアッシュの生産性が低くなる場合がある。
このため、本実施形態では、分級精度指数к（Ｄ２５／Ｄ７５）は０．６以上０．７以下の範囲内とされている。
The closer the classification accuracy index κ is to 1, the narrower the particle size distribution and the more uniform the particle size.
It is preferable that the fly ash has a narrow particle size distribution to some extent and the particle size is uniform because the effect of improving the fluidity due to the ball bearing effect of the spherical particles is high. If the classification accuracy index к is less than 0.6, the ball bearing effect may be reduced and the fluidity of the fast-hardening semi-flexible pavement-injected milk may be reduced. On the other hand, when the classification accuracy index к exceeds 0.7, the particle size distribution becomes too narrow, so that the number of fine fly ash particles is extremely reduced, and the injection milk for fast-hardening semi-flexible pavement is injected into the open-grained asphalt mixture. The rate may decrease. In addition, since fly ash produced in the boiler of a coal-fired power plant generally has a wide particle size distribution, if the classification conditions are set so that the classification accuracy index κ exceeds 0.7, the classification efficiency will decrease and fly ash production will occur. The sex may be low.
Therefore, in the present embodiment, the classification accuracy index к (D25 / D75) is set to be within the range of 0.6 or more and 0.7 or less.
ブレーン比表面積は、ブレーン法により測定された比表面積であり、ＪＩＳ Ａ ６２０１（コンクリート用フライアッシュ）に準拠した方法により測定した値である。
ブレーン比表面積が小さくなりすぎるとフライアッシュ粒子が粗くなるため、フライアッシュの球状粒子によるボールベアリング効果が低下し、速硬型半たわみ性舗装用注入ミルクの流動性が低下するとともにブリーディング率が高くなるおそれがある。このため、本実施形態では、ブレーン比表面積は３５００ｃｍ２／ｇ以上とされている。一方、ブレーン比表面積が大きくなりすぎる、すなわちフライアッシュ粒子が細かくなりすぎると、凝集粒子を形成しやすくなり、速硬型半たわみ性舗装用注入ミルクの流動性が低下するおそれがある。このため、ブレーン比表面積は、７０００ｃｍ２／ｇ以下であることが好ましい。
The specific surface area of Blaine is a specific surface area measured by the Blaine method, and is a value measured by a method based on JIS A 6201 (fly ash for concrete).
If the specific surface area of the brain becomes too small, the fly ash particles become coarse, so that the ball bearing effect due to the spherical particles of fly ash decreases, the fluidity of the fast-hardening semi-flexible pavement injection milk decreases, and the bleeding rate increases. There is a risk of becoming. Therefore, in the present embodiment, the brain specific surface area is set to 3500 cm 2 / g or more. On the other hand, if the specific surface area of the brain becomes too large, that is, the fly ash particles become too fine, agglomerated particles are likely to be formed, and the fluidity of the fast-hardening semi-flexible pavement-injected milk may decrease. Therefore, the specific surface area of the brain is preferably 7000 cm 2 / g or less.
以上のようなフライアッシュは、例えば、石炭火力発電所にて回収されたフライアッシュから未燃カーボンを除去し、分級して粒径を調整することによって製造することができる。未燃カーボンを除去する方法としては、特に制限はないが、浮選法、静電選別法、加熱法、分級法を用いることができる。浮選法とは、フライアッシュと水とを含むスラリーを調製し、疎水性の未燃カーボンをスラリー中に浮上させて浮上物として除去する方法である。静電選別法とは、フライアッシュと未燃カーボンとを互いに逆の電荷に帯電させ、電荷の極性を利用して未燃カーボンを除去する方法である。加熱法とは、未燃カーボンを加熱分解して除去する方法である。分級法は、分級によって粗大な未燃カーボンの粒子を除去する方法である。 The fly ash as described above can be produced, for example, by removing unburned carbon from the fly ash recovered at a coal-fired power plant, classifying the fly ash, and adjusting the particle size. The method for removing unburned carbon is not particularly limited, but a flotation method, an electrostatic sorting method, a heating method, and a classification method can be used. The flotation method is a method in which a slurry containing fly ash and water is prepared, and hydrophobic unburned carbon is floated in the slurry and removed as a flotation substance. The electrostatic sorting method is a method in which fly ash and unburned carbon are charged with opposite charges and the unburned carbon is removed by utilizing the polarity of the charges. The heating method is a method of removing unburned carbon by heating and decomposing it. The classification method is a method of removing coarse unburned carbon particles by classification.
（細骨材）
細骨材には特に制限はなく、半たわみ性舗装用注入材の細骨材として利用されている公知の細骨材を用いることができる。細骨材としては、例えば、山砂、川砂、陸砂、砕砂、海砂、珪砂４〜９号を用いることができる。
(Fine aggregate)
The fine aggregate is not particularly limited, and a known fine aggregate used as a fine aggregate for a semi-flexible pavement injection material can be used. As the fine aggregate, for example, mountain sand, river sand, land sand, crushed sand, sea sand, and silica sand Nos. 4 to 9 can be used.
細骨材の含有量は、ポルトランドセメントと速硬性混和材の合計量１００質量部に対して５質量部以上５０質量部以下の範囲内にあることが好ましく、１０質量部以上３０質量部以下の範囲内にあることがさらに好ましい。細骨材の含有量が５質量部未満では、速硬型半たわみ性舗装用注入材に水を加えて練り混ぜるときの分散媒体となる細骨材が少なくなりすぎて、良好な練り混ぜができなくなるおそれがある。一方、細骨材の含有量が７０質量部を超えると、細骨材が速硬型半たわみ性舗装用注入ミルク内で沈降、分離するおそれがある。 The content of the fine aggregate is preferably in the range of 5 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the total amount of Portland cement and the quick-hardening admixture, and is preferably 10 parts by mass or more and 30 parts by mass or less. It is more preferably within the range. If the content of the fine aggregate is less than 5 parts by mass, the amount of fine aggregate that becomes a dispersion medium when water is added to the quick-hardening semi-flexible pavement injection material and kneaded is too small, resulting in good kneading. It may not be possible. On the other hand, if the content of the fine aggregate exceeds 70 parts by mass, the fine aggregate may settle and separate in the quick-hardening semi-flexible pavement-injected milk.
（再乳化粉末樹脂）
再乳化粉末樹脂は、速硬型半たわみ性舗装用注入ミルクの流動性および保水性を向上させる作用がある。また、注入ミルクを注入した舗装体のひび割れを防止する作用もある。再乳化粉末樹脂（樹脂エマルジョン）としては、例えば、アクリル系、アクリル−ベオバ系、ＥＶＡ（エチレン・酢酸ビニル共重合体）系、ＳＢＲ（スチレン・ブタジエンゴム）系など半たわみ性舗装用注入材の再乳化粉末樹脂として利用されている公知の材料を用いることができる。
(Re-emulsified powder resin)
The re-emulsified powder resin has an effect of improving the fluidity and water retention of the quick-hardening semi-flexible pavement-filled milk. It also has the effect of preventing cracks in the pavement into which the injected milk has been injected. Examples of the re-emulsified powder resin (resin emulsion) include acrylic, acrylic-beova, EVA (ethylene / vinyl acetate copolymer), SBR (styrene / butadiene rubber), and other semi-flexible pavement injection materials. A known material used as a re-emulsified powder resin can be used.
再乳化粉末樹脂の含有量は、ポルトランドセメントと速硬性混和材の合計量１００質量部に対して１．０質量部以上２０．０質量部以下の範囲内にあることが好ましく、２．０質量部以上１０．０質量部以下の範囲内にあることがさらに好ましい。再乳化粉末樹脂の含有量が１．０質量部未満では、再乳化粉末樹脂による上記の効果が十分に発揮されないおそれがある。一方、再乳化粉末樹脂の含有量が２０質量部を超えると、注入ミルクの粘度が高くなりすぎて、アスファルト混合物の空隙への注入性が低下するおそれがある。 The content of the re-emulsified powder resin is preferably in the range of 1.0 part by mass or more and 20.0 parts by mass or less with respect to 100 parts by mass of the total amount of Portland cement and the quick-hardening admixture, and is 2.0 mass by mass. It is more preferably in the range of more than 10 parts and not more than 10.0 parts by mass. If the content of the re-emulsified powder resin is less than 1.0 part by mass, the above effect of the re-emulsified powder resin may not be sufficiently exhibited. On the other hand, if the content of the re-emulsified powder resin exceeds 20 parts by mass, the viscosity of the injected milk becomes too high, and the asphalt mixture may be poorly injected into the voids.
（消泡剤）
消泡剤は、速硬型半たわみ性舗装用注入ミルクの泡の発生を抑えて、流動性を向上させる作用がある。消泡剤としては、例えば、エーテル類、脂肪酸エステル、脂肪酸アミド、高級アルコール、高重合グリコール、シリコーン類等など半たわみ性舗装用注入材の消泡剤として利用されている公知の材料を用いることができる。
(Defoamer)
The defoaming agent has the effect of suppressing the generation of foam in the quick-hardening semi-flexible pavement-injected milk and improving the fluidity. As the defoaming agent, for example, known materials used as defoaming agents for semi-flexible paving injection materials such as ethers, fatty acid esters, fatty acid amides, higher alcohols, highly polymerized glycols, silicones, etc. are used. Can be done.
消泡剤の含有量は、ポルトランドセメントと速硬性混和材の合計量１００質量部に対して０．０５質量部以上３．０質量部以下の範囲内にあることが好ましく、０．１０質量部以上２．０質量部以下の範囲内にあることがさらに好ましい。消泡剤の含有量が０．０５質量部未満では、消泡剤による上記の効果が十分に発揮されないおそれがある。一方、消泡剤の含有量が３．０質量部を超えても、消泡効果の増大が期待できないばかりか、注入ミルクの硬化遅延や強度発現性が悪くなるという弊害が生じるおそれがある。 The content of the defoaming agent is preferably in the range of 0.05 parts by mass or more and 3.0 parts by mass or less with respect to 100 parts by mass of the total amount of Portland cement and the quick-hardening admixture, and 0.10 parts by mass. It is more preferably within the range of 2.0 parts by mass or less. If the content of the defoaming agent is less than 0.05 parts by mass, the above-mentioned effect of the defoaming agent may not be sufficiently exhibited. On the other hand, even if the content of the defoaming agent exceeds 3.0 parts by mass, not only the defoaming effect cannot be expected to increase, but also the curing delay of the injected milk and the deterioration of the strength development may occur.
（凝結調整剤）
凝結調整剤は、速硬型半たわみ性舗装用注入ミルクの凝結時間を調整する作用がある。凝結調整剤は、無機炭酸塩、オキシカルボン酸、アルミン酸ナトリウムおよび硫酸ナトリウムのうちの１つ以上を含む組成物であることが好ましく、全部を含む組成物であることが特に好ましい。無機炭酸塩は、アルカリ金属の炭酸塩あるいは炭酸水素塩であることが好ましい。無機炭酸塩の例としては、炭酸ナトリウム、炭酸カリウム、炭酸水素ナトリウム、炭酸水素カリウム、炭酸リチウム、炭酸アンモニウムが挙げられる。これらの無機炭酸塩は、１つを単独で使用してもよいし、２つ以上を組合せて使用してもよい。オキシカルボン酸の例としては酒石酸、クエン酸、リンゴ酸、グルコン酸、マレイン酸を挙げられる。これらのオキシカルボン酸は、１つを単独で使用してもよいし、２つ以上を組合せて使用してもよい。
(Condensation adjuster)
The coagulation adjuster has the effect of adjusting the coagulation time of the fast-hardening semi-flexible pavement infused milk. The coagulation adjuster is preferably a composition containing one or more of an inorganic carbonate, an oxycarboxylic acid, sodium aluminate and sodium sulfate, and particularly preferably a composition containing all of them. The inorganic carbonate is preferably an alkali metal carbonate or a hydrogen carbonate. Examples of inorganic carbonates include sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, lithium carbonate and ammonium carbonate. One of these inorganic carbonates may be used alone, or two or more thereof may be used in combination. Examples of oxycarboxylic acids include tartaric acid, citric acid, malic acid, gluconic acid and maleic acid. One of these oxycarboxylic acids may be used alone, or two or more of them may be used in combination.
凝結調整剤の含有量は、ポルトランドセメントと速硬性混和材の合計量１００質量部に対して０．２質量部以上１０．０質量部以下の範囲内にあることが好ましく、０．４質量部以上６．０質量部以下の範囲内にあることがさらに好ましい。凝結調整剤の含有量が０．２質量部未満では、凝結調整剤による上記の効果が十分に発揮されないおそれがある。一方、凝結調整剤の含有量が１０．０質量部を超えると、注入ミルクの凝結時間が遅くなりすぎるおそれがある。 The content of the setting agent is preferably in the range of 0.2 parts by mass or more and 10.0 parts by mass or less with respect to 100 parts by mass of the total amount of Portoland cement and the fast-curing admixture, and 0.4 parts by mass. It is more preferable that the content is within the range of 6.0 parts by mass or less. If the content of the coagulation adjuster is less than 0.2 parts by mass, the above effect of the coagulation adjuster may not be sufficiently exhibited. On the other hand, if the content of the coagulation adjusting agent exceeds 10.0 parts by mass, the coagulation time of the injected milk may be too slow.
（その他の成分）
速硬型半たわみ性舗装用注入材は、さらに他の混和材を含んでいてもよい。他の混和材の例としては、減水剤、増粘剤、空気連行剤、防錆剤を挙げることができる。
(Other ingredients)
The fast-hardening semi-flexible pavement injection material may further contain other admixtures. Examples of other admixtures include water reducing agents, thickeners, air entraining agents, and rust inhibitors.
（速硬型半たわみ性舗装用注入材の製造方法）
本実施形態の速硬型半たわみ性舗装用注入材は、上述の材料を混合することによって製造することができる。混合装置としては、ロッキングミキサ、Ｖ型ミキサ、縦型ミキサ、万能混合機等の通常の粉体混合装置を用いることができる。
(Manufacturing method of quick-hardening semi-flexible pavement injection material)
The quick-hardening semi-flexible pavement injection material of the present embodiment can be produced by mixing the above-mentioned materials. As the mixing device, a normal powder mixing device such as a locking mixer, a V-type mixer, a vertical mixer, and a universal mixer can be used.
［速硬型半たわみ性舗装用注入ミルク］
本実施形態の速硬型半たわみ性舗装用注入ミルクは、上述の速硬型半たわみ性舗装用注入材と水とを含む。速硬型半たわみ性舗装用注入ミルクは、水の含有量が、速硬型半たわみ性舗装用注入材１００質量部に対する量として３８質量部以上６０質量部以下の範囲内とされている。水の含有量が少なくなりすぎると速硬型半たわみ性舗装用注入ミルクの粘度が高くなりすぎて、開粒度アスファルト混合物への注入率が低下するおそれがある。一方、水の含有量が多くなりすぎると速硬型半たわみ性舗装用注入ミルクのブリーディング率が高くなりすぎるおそれがある。また、水の含有量が多い速硬型半たわみ性舗装用注入ミルクを使用した舗装体は、滑り抵抗値が低下するおそれがある。
[Fast-hardening semi-flexible pavement injection milk]
The quick-hardening semi-flexible pavement injection milk of the present embodiment contains the above-mentioned quick-hardening semi-flexible pavement injection material and water. The content of the water content of the quick-hardening semi-flexible pavement injection milk is within the range of 38 parts by mass or more and 60 parts by mass or less as the amount with respect to 100 parts by mass of the quick-hardening semi-flexible pavement injection material. If the water content is too low, the viscosity of the fast-hardening semi-flexible pavement-injected milk becomes too high, which may reduce the injection rate into the open-grained asphalt mixture. On the other hand, if the water content is too high, the bleeding rate of the quick-hardening semi-flexible pavement-injected milk may become too high. In addition, a pavement using infused milk for quick-hardening semi-flexible pavement having a high water content may have a reduced slip resistance value.
速硬型半たわみ性舗装用注入ミルクは、粘度が１５０ｍＰａ・ｓ以上６００ｍＰａ・ｓ以下の範囲内にあることが好ましく、２００ｍＰａ・ｓ以上、４００ｍＰａ・ｓ以下の範囲内にあることがさらに好ましい。粘度が１５０ｍＰａ・ｓ未満となると、注入ミルクの流動性が高くなりすぎて、ブリーディング率が高くなり、その結果、その注入ミルクを使用した舗装体は、滑り抵抗値が低下するおそれがある。一方、粘度が６００ｍＰａ・ｓ以下となると、開粒度アスファルト混合物への注入性が低下するおそれがある。 The quick-hardening semi-flexible pavement-injected milk preferably has a viscosity in the range of 150 mPa · s or more and 600 mPa · s or less, and more preferably 200 mPa · s or more and 400 mPa · s or less. If the viscosity is less than 150 mPa · s, the fluidity of the injected milk becomes too high and the bleeding rate becomes high, and as a result, the pavement using the injected milk may have a low slip resistance value. On the other hand, when the viscosity is 600 mPa · s or less, the injectability into the open-grained asphalt mixture may decrease.
（速硬型半たわみ性舗装用注入ミルクの調製方法）
速硬型半たわみ性舗装用注入ミルクは、速硬型半たわみ性舗装用注入材と水とを混合することによって調製することができる。速硬型半たわみ性舗装用注入材と水との混合は、半たわみ性舗装用注入材に水を加えて混合してもよいし、水に半たわみ性舗装用注入材を加えて混合してもよい。
(Preparation method of infused milk for quick-hardening semi-flexible pavement)
The fast-hardening semi-flexible pavement injection milk can be prepared by mixing a quick-hardening semi-flexible pavement injection material with water. The quick-hardening semi-flexible pavement injection material and water may be mixed by adding water to the semi-flexible pavement injection material or by adding the semi-flexible pavement injection material to water and mixing. You may.
以上のような構成とされた本実施形態の速硬型半たわみ性舗装用注入材によれば、速硬性混和材を含むので、短時間で強度を発現することができ、比較的短時間で交通開放が可能な注入ミルクを調製することができる。また、ポルトランドセメントと速硬性混和材の合計量１００質量部に対するフライアッシュの含有量が５質量部以上７０質量部以下の範囲内にあるので、流動性が高く、硬化が始まる前に開粒度アスファルト混合物の空隙に注入しやすい注入ミルクを調製することができる。さらに、フライアッシュは、ハンター表色系におけるＬ値が５０．０以上、強熱減量が４．０質量％以下、メチレンブルー吸着量が０．８０ｍｇ／ｇ以下の３つの要件を満足しているので、未燃カーボンが浮き上がりにくい。このため、この速硬型半たわみ性舗装用注入材を用いて調製した注入ミルクを使用した舗装体は、未燃カーボンの浮き上がりによる黒斑が発生しにくくなる。 According to the fast-hardening semi-flexible pavement injection material of the present embodiment having the above configuration, since the quick-hardening admixture is contained, the strength can be developed in a short time, and the strength can be developed in a relatively short time. Infused milk that can open traffic can be prepared. In addition, since the content of fly ash is within the range of 5 parts by mass or more and 70 parts by mass or less with respect to the total amount of 100 parts by mass of Portland cement and the fast-hardening admixture, the fluidity is high and the open particle size asphalt is before hardening starts. Infused milk can be prepared that is easy to inject into the voids of the mixture. Furthermore, fly ash satisfies the three requirements of L value of 50.0 or more, ignition loss of 4.0% by mass or less, and methylene blue adsorption amount of 0.80 mg / g or less in the hunter color system. , Unburned carbon is hard to lift up. Therefore, in the pavement body using the injected milk prepared by using this quick-hardening semi-flexible pavement injection material, black spots due to the floating of unburned carbon are less likely to occur.
また、本実施形態の速硬型半たわみ性舗装用注入材において、フライアッシュが、４５μｍふるい残分が１質量％以上１０質量％以下の範囲内にあって、分級精度指数к（Ｄ２５／Ｄ７５）が０．６以上０．７以下の範囲内にあり、ブレーン比表面積が３５００ｃｍ２／ｇ以上である場合は、流動性がより高く、開粒度アスファルト混合物の空隙により注入しやすい注入ミルクを調製することができる。 Further, in the fast-hardening semi-flexible pavement injection material of the present embodiment, the fly ash has a 45 μm sieve residue in the range of 1% by mass or more and 10% by mass or less, and the classification accuracy index к (D25 / D75). ) Is in the range of 0.6 or more and 0.7 or less, and when the brain specific surface area is 3500 cm 2 / g or more, the infused milk having higher fluidity and easier to inject due to the voids of the open-grained asphalt mixture is prepared. can do.
また、本実施形態の速硬型半たわみ性舗装用注入材において、ポルトランドセメント１００質量部に対して、細骨材の含有量が５質量部以上５０質量部以下の範囲内、再乳化粉末樹脂の含有量が１．０質量部以上２０．０質量部以下の範囲内、消泡剤の含有量が０．０５質量部以上３．０質量部以下の範囲内、凝結調整剤の含有量が０．１質量部以上１０質量部以下の範囲内にある場合は、これら添加物の各作用が有効に作用するので、流動性がさらに高く、開粒度アスファルト混合物の空隙にさらに注入しやすい注入ミルクを調製することができる。 Further, in the quick-hardening semi-flexible pavement injection material of the present embodiment, the content of the fine aggregate is in the range of 5 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of Portoland cement, and the re-emulsified powder resin. The content of the defoaming agent is in the range of 1.0 part by mass or more and 20.0 parts by mass or less, the content of the defoaming agent is in the range of 0.05 parts by mass or more and 3.0 parts by mass or less, and the content of the coagulation adjusting agent is. When it is in the range of 0.1 part by mass or more and 10 parts by mass or less, each action of these additives works effectively, so that the infusion milk has higher fluidity and is easier to inject into the voids of the open-grained asphalt mixture. Can be prepared.
本実施形態の速硬型半たわみ性舗装用注入ミルクによれば、上述の速硬型半たわみ性舗装用注入材と水とを含み、速硬型半たわみ性舗装用注入材１００質量部に対する水の含有量が３８質量部以上６０質量部以下の範囲内にあるので、短時間で強度を発現することができる。また、流動性が高く、強度が発現する前に開粒度アスファルト混合物の空隙に注入することができる。さらに、未燃カーボンが浮き上がりにくいので、この半たわみ性舗装用注入ミルクを使用した舗装体は、未燃カーボンの浮き上がりによる黒斑が発生しにくくなる。 According to the fast-hardening semi-flexible pavement injection milk of the present embodiment, the above-mentioned quick-hardening semi-flexible pavement injection material and water are contained, and the amount of the fast-hardening semi-flexible pavement injection material is 100 parts by mass. Since the water content is in the range of 38 parts by mass or more and 60 parts by mass or less, the strength can be developed in a short time. It is also highly fluid and can be injected into the voids of the open particle asphalt mixture before it develops strength. Further, since the unburned carbon is hard to lift up, the pavement using this semi-flexible pavement-injected milk is less likely to generate black spots due to the lift-up of the unburned carbon.
また、本実施形態の速硬型半たわみ性舗装用注入ミルクにおいて、粘度が１５０ｍＰａ・ｓ以上６００ｍＰａ・ｓ以下の範囲内にある場合、開粒度アスファルト混合物の空隙にさらに注入しやすく、ブリーディングが発生しにくくなるので、舗装体の滑り抵抗性が高くなる。 Further, in the fast-hardening semi-flexible pavement injection milk of the present embodiment, when the viscosity is in the range of 150 mPa · s or more and 600 mPa · s or less, it is easier to inject into the voids of the open particle size asphalt mixture, and bleeding occurs. Since it becomes difficult to do so, the slip resistance of the pavement becomes high.
以上、本発明の実施形態について説明したが、本発明はこれに限定されることはなく、その発明の技術的思想を逸脱しない範囲で適宜変更可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the invention.
次に、本発明の作用効果を実施例により説明する。 Next, the action and effect of the present invention will be described by way of examples.
＜使用材料＞
本実施例では、下記の表１に示す材料と、下記の表２に示すフライアッシュＡ〜Ｉとを使用した。なお、フライアッシュＡ〜Ｉは、異なる石炭火力発電所にて回収されたフライアッシュを、強制渦流式分級装置（日新エンジニアリング社製、ターボクラシファイア、型式ＴＣＦ−２０００）を用いて、回転翼の回転数１０００ｒｐｍの条件で分級して得た細粉側のフライアッシュである。
<Material used>
In this example, the materials shown in Table 1 below and the fly ash A to I shown in Table 2 below were used. For fly ash A to I, fly ash collected at different coal-fired power plants is used as a rotary wing using a forced eddy current classification device (Turbo Classifier, model TCF-2000, manufactured by Nissin Engineering Co., Ltd.). It is a fly ash on the fine powder side obtained by classifying under the condition of a rotation speed of 1000 rpm.
［本発明例１〜５、比較例１〜７］
（速硬型半たわみ性舗装用注入材の調製）
上記の表１に示す材料と表２に示すフライアッシュ（ＦＡ）とを、下記の表３に示す配合割合で、かつ合計量６０００ｇとなるように計り取った。次いで、計り取った各材料とフライアッシュとを、ロッキングミキサで２０分間乾式混合して、速硬型半たわみ性舗装用注入材（注入材Ａ１〜Ａ９）を調製した。また、下記の表３に示すように、フライアッシュの代わりに石灰石微粉末を用い、さらに増粘剤を加えたこと以外は同様にして、速硬型半たわみ性舗装用注入材（注入材Ｂ１〜Ｂ３）を調製した。
[Examples 1 to 5 of the present invention, Comparative Examples 1 to 7]
(Preparation of quick-hardening semi-flexible pavement injection material)
The materials shown in Table 1 and the fly ash (FA) shown in Table 2 were measured at the blending ratios shown in Table 3 below so as to have a total amount of 6000 g. Then, each of the measured materials and fly ash were dry-mixed with a locking mixer for 20 minutes to prepare a quick-hardening semi-flexible pavement injection material (injection materials A1 to A9). Further, as shown in Table 3 below, a quick-hardening semi-flexible pavement injection material (injection material B1) was used in the same manner except that limestone fine powder was used instead of fly ash and a thickener was further added. ~ B3) was prepared.
（速硬型半たわみ性舗装用注入ミルクの調製）
プラスチック製容器に水道水を２７００ｇ投入した。次いで、この水道水を、ラボスターラー（ヘイドン社製、型式ＨＥ−１２００）を用いて、回転数４００ｒｐｍの撹拌羽根で撹拌しながら、上記水道水に上記で調製した速硬型半たわみ性舗装用注入材６０００ｇ（注入材１００質量部に対する水の含有量：４５質量部）を約３０秒間で投入した。速硬型半たわみ性舗装用注入材の投入後、撹拌羽根の回転数を８００ｒｐｍにして２分間練り混ぜて注入ミルクを調製した。なお、注入ミルクの調製は温度２０℃の環境下で行った。
上記のようにして調製した注入ミルクを用いて、下記の評価を実施した。その結果を、下記の表４に示す。なお、本発明例４、５は、本発明の発明例ではない。
(Preparation of quick-hardening semi-flexible pavement infused milk)
2700 g of tap water was put into a plastic container. Next, this tap water is stirred with a stirring blade having a rotation speed of 400 rpm using a lab stirrer (manufactured by Haydon Co., Ltd., model HE-1200), and the tap water is mixed with the above-mentioned tap water for the quick-hardening semi-flexible pavement. 6000 g of the injection material (water content with respect to 100 parts by mass of the injection material: 45 parts by mass) was added in about 30 seconds. After the quick-hardening semi-flexible pavement injection material was added, the stirring blade was rotated at 800 rpm and kneaded for 2 minutes to prepare an injected milk. The injected milk was prepared in an environment with a temperature of 20 ° C.
The following evaluation was performed using the infused milk prepared as described above. The results are shown in Table 4 below. Examples 4 and 5 of the present invention are not examples of the present invention.
（１）注入ミルク温度
調製直後の注入ミルクの温度を測定した。
(1) Infused milk temperature The temperature of the infused milk immediately after preparation was measured.
（２）Ｐロート流下時間
土木学会規準「プレパックドコンクリートの注入モルタルの流動性試験方法（Ｐロートによる方法）（ＪＳＣＥ−Ｆ５２１）」に準拠した方法により測定した。
(2) P-roto flow time The measurement was performed by a method in accordance with the JSCE standard "Fluidity test method of prepacked concrete injection mortar (method by P-roat) (JSCE-F521)".
（３）粘度
ブルックフィールド型回転粘度計（Ｂ型）を用いて測定した。
(3) Viscosity Measured using a Brookfield type rotational viscometer (B type).
（４）凝結時間
ＪＩＳ Ｒ ５２０１「セメントの物理試験方法」に準拠した方法により、注入ミルク調製直後からの凝結始発時間および凝結終結時間を測定した。
(4) Condensation time By a method based on JIS R 5201 "Physical test method for cement", the condensation start time and the condensation end time immediately after the preparation of the injected milk were measured.
（５）ブリーディング率
注入ミルク１０００ｍＬを、プラスチック製容器に投入して３時間静置した。静置後、注入ミルクの表面に浮上した水の量Ａ（ｍＬ）を測定し、下記の式よりブリーディング率を算出した。
ブリーディング率（％）＝Ａ／１０００×１００
(5) Bleeding rate 1000 mL of injected milk was put into a plastic container and allowed to stand for 3 hours. After standing, the amount of water A (mL) floating on the surface of the injected milk was measured, and the bleeding rate was calculated from the following formula.
Bleeding rate (%) = A / 1000 × 100
（６）圧縮強度
注入ミルクを、４ｃｍ×４ｃｍ×１６ｃｍの鋼製型枠に流し込んで硬化させた。材齢３時間の圧縮強度は、注入ミルクを鋼製型枠に流し込んでから３時間後に硬化体を型枠から脱枠して、直ちに測定した。材齢７日の圧縮強度試験は、注入ミルクを鋼製型枠に流し込んでから１日後に硬化体を型枠から脱枠し、得られた硬化体を、水を含んだ濡れウエスに包んだ状態で袋に入れ、材齢７日まで養生した後に測定した。圧縮強度の測定は、ＪＩＳ Ｒ ５２０１「セメントの物理試験方法」に準拠した方法により測定した。
(6) Compressive strength The injected milk was poured into a 4 cm × 4 cm × 16 cm steel mold and cured. The compressive strength at 3 hours of age was measured immediately after the cured product was unframed from the mold 3 hours after the injected milk was poured into the steel mold. In the compressive strength test of 7 days of age, the cured product was removed from the mold one day after the injected milk was poured into the steel mold, and the obtained cured product was wrapped in a wet waste cloth containing water. It was put in a bag in the state, and it was measured after curing up to 7 days of age. The compressive strength was measured by a method according to JIS R 5201 “Physical test method for cement”.
（７）開粒度アスファルト混合物への注入率
空隙率が２２．５％で、寸法が３０ｃｍ×３０ｃｍ×厚さ５ｃｍである開粒度アスファルト混合物を用意した。なお、この開粒度アスファルト混合物の空隙量は、１０１２．５ｃｍ３である。
上記の開粒度アスファルト混合物の底面と側面をガムテープで封止した後、開粒度アスファルト混合物の上面から注入ミルクを自然注入により流し込んだ。目視により注入ミルクの上面と開粒度アスファルト混合物の上面の位置とが同位置になったときを注入終了と判断し、注入された注入ミルクの体積Ｂ（ｃｍ３）を測定して、下記の式より開粒度アスファルト混合物への注入率を算出した。
開粒度アスファルト混合物への注入率（％）＝Ｂ／１０１２．５×１００
(7) Injection rate into open-grained asphalt mixture An open-grained asphalt mixture having a porosity of 22.5% and dimensions of 30 cm × 30 cm × thickness of 5 cm was prepared. The amount of voids in this open particle asphalt mixture is 1012.5 cm 3 .
After sealing the bottom surface and the side surface of the above-mentioned open-grained asphalt mixture with gum tape, the injected milk was poured from the upper surface of the open-grained asphalt mixture by natural injection. When the upper surface of the injected milk and the upper surface of the open-grained asphalt mixture are visually aligned with each other, it is judged that the injection is completed, and the volume B (cm 3 ) of the injected milk is measured and the following formula is used. The injection rate into the open-grained asphalt mixture was calculated.
Injection rate (%) into open-grained asphalt mixture = B / 1012.5 × 100
（８）舗装体の未燃カーボンの浮き上がり
上記（７）と同様に、開粒度アスファルト混合物に注入ミルクを流し込んで、舗装体を作製した。注入ミルクを注入してから３時間後、舗装体の表面を目視観察し、舗装体表面への未燃カーボンの浮き上がり状況を確認した。舗装体の表面（面積：９００ｃｍ２）に対して、未燃カーボンの浮き上がりによる黒斑が全く認められない場合を「◎」、黒斑の個数が５個以下であった場合を「○」、黒斑の個数が６個以上であった場合を「×」として評価した。
(8) Lifting of unburned carbon in the pavement In the same manner as in (7) above, the injected milk was poured into the open-grained asphalt mixture to prepare the pavement. Three hours after injecting the injected milk, the surface of the pavement was visually observed to confirm the floating state of unburned carbon on the surface of the pavement. "◎" when no black spots due to the floating of unburned carbon are observed on the surface of the pavement (area: 900 cm 2), "○" when the number of black spots is 5 or less. When the number of black spots was 6 or more, it was evaluated as "x".
（９）舗装体の滑り抵抗値
上記（７）と同様に、開粒度アスファルト混合物に注入ミルクを流し込んで、舗装体を作製した。注入ミルクを注入してから２４時間後、舗装体の滑り抵抗値を、スキットレジスタンス式滑り抵抗試験装置を用いて、舗装試験法便覧（日本道路協会編）に準拠した方法により測定した。なお、滑り抵抗値は、舗装体の滑りやすさを指標する値であり、６５ＢＰＮ以上が良好とされている。
(9) Sliding resistance value of the pavement In the same manner as in (7) above, the injected milk was poured into the open-grained asphalt mixture to prepare the pavement. Twenty-four hours after injecting the injected milk, the slip resistance value of the pavement was measured by a method according to the Pavement Test Method Handbook (edited by Nippon Road Association) using a skit resistance type slip resistance test device. The slip resistance value is a value that indicates the slipperiness of the pavement, and is considered to be good at 65 BPN or higher.
Ｌ値と強熱減量とＭＢ吸着量が本発明の範囲から外れるフライアッシュＦを含む注入材Ａ６を用いた比較例１の注入ミルクを使用して作製した舗装体は、未燃カーボンの浮き上がりによる黒斑が多く発生した。フライアッシュＧ〜Ｉを含む注入材Ａ７〜Ａ９を用いた比較例２〜４の注入ミルクを使用して作製した舗装体についても未燃カーボンの浮き上がりが若干認められた。これは、フライアッシュＧ〜Ｉは、Ｌ値、強熱減量、ＭＢ吸着量のうち、いずれか１つが本発明の範囲を満足していないためと考えられる。
混合材として石灰石微粉末を含む注入材Ｂ１〜Ｂ３を用いた比較例２〜４の注入ミルクは、粘度が低く、所要の粘度とするためには増粘剤の添加が必要となった。特に、増粘剤の添加量が少ない注入材Ｂ１〜Ｂ２を用いた比較例２〜３の注入ミルクは、粘度が低く、本発明例１〜５に比べてブリーディング率が顕著に高くなり、開粒度アスファルト混合物への注入率が低くなった。さらに、これらを使用して作製した舗装体は、滑り抵抗値が低下した。
The pavement produced using the injected milk of Comparative Example 1 using the injection material A6 containing fly ash F whose L value, ignition loss and MB adsorption amount are out of the range of the present invention is due to the floating of unburned carbon. Many black spots occurred. Even in the pavement prepared by using the injected milk of Comparative Examples 2 to 4 using the injection materials A7 to A9 containing fly ash GI, a slight floating of unburned carbon was observed. It is considered that this is because fly ash GI does not satisfy the scope of the present invention in any one of L value, ignition loss and MB adsorption amount.
The injection milks of Comparative Examples 2 to 4 using the injection materials B1 to B3 containing the fine powder of limestone as the mixing material had a low viscosity, and it was necessary to add a thickener in order to obtain the required viscosity. In particular, the injected milks of Comparative Examples 2 to 3 using the injection materials B1 to B2 in which the amount of the thickener added is small have a low viscosity, and the bleeding rate is significantly higher than that of Examples 1 to 5 of the present invention. The rate of injection into the particle size asphalt mixture was low. Furthermore, the pavement produced using these had a reduced slip resistance value.
これに対して、Ｌ値と強熱減量とＭＢ吸着量が本発明の範囲にあるフライアッシュＡ〜Ｅを含む注入材Ａ１〜Ａ５を用いた本発明例１〜５の注入ミルクは、増粘剤を添加しなくてもブリーディング率が低く、開粒度アスファルト混合物への注入率および舗装体の滑り抵抗値が高くなった。また、これらを使用して作製した舗装体は、未燃カーボンの浮き上がりよる黒斑の個数が少なくなった。特に、４５μｍふるい残分が１質量％以上１０質量％以下の範囲内にあって、分級精度指数к（Ｄ２５／Ｄ７５）が０．６以上０．７以下の範囲内にあり、ブレーン比表面積が３５００ｃｍ２／ｇ以上であるフライアッシュＡ〜Ｃ含む注入材Ａ１〜Ａ３を用いた本発明例１〜３の注入ミルクは、ブリーディング率が低く、開粒度アスファルト混合物への注入率が高くなった。また、これらの注入ミルクを使用して作製した舗装体は、未燃カーボンの浮きが発生せず、滑り抵抗値が６５ＢＰＮ以上と良好であった。なお、本発明例５の注入ミルクは、舗装体の未燃カーボンの浮き上がりによる黒斑が若干認められたが（評価○）、他の評価項目は概ね良好な結果が得られた。 On the other hand, the injected milk of Examples 1 to 5 of the present invention using the injection materials A1 to A5 containing fly ash A to E whose L value, ignition loss and MB adsorption amount are within the range of the present invention is thickened. The bleeding rate was low without the addition of the agent, and the injection rate into the open-grained asphalt mixture and the slip resistance value of the pavement were high. In addition, the number of black spots due to the floating of unburned carbon was reduced in the pavement produced using these. In particular, the 45 μm sieve residue is in the range of 1% by mass or more and 10% by mass or less, the classification accuracy index к (D25 / D75) is in the range of 0.6 or more and 0.7 or less, and the brain specific surface area is high. The injected milks of Examples 1 to 3 of the present invention using the injection materials A1 to A3 containing fly ash A to C having a size of 3500 cm 2 / g or more had a low bleeding rate and a high injection rate into the open particle size asphalt mixture. Further, in the pavement produced by using these injected milks, the unburned carbon did not float, and the slip resistance value was as good as 65 BPN or more. In the injected milk of Example 5 of the present invention, some black spots due to the floating of unburned carbon in the pavement were observed (evaluation ○), but other evaluation items generally gave good results.
［本発明例１、本発明例６〜７、比較例６、比較例８〜９］
本発明例６は、注入ミルクの調製と評価を５℃の環境下で行ったこと以外は本発明例１と同様に行い、比較例８は、注入ミルクの調製と評価を５℃の環境下で行ったこと以外は比較例６と同様に行った。
本発明例７は、注入ミルクの調製と評価を３５℃の環境下で行ったこと以外は本発明例１と同様に行い、比較例９は、注入ミルクの調製と評価を３５℃の環境下で行ったこと以外は比較例６と同様に行った。
その結果を、本発明例１（環境温度：２０℃）と比較例６（環境温度：２０℃）と共に、下記の表５に示す。
[Example 1 of the present invention, Examples 6 to 7 of the present invention, Comparative Example 6, Comparative Examples 8 to 9]
Example 6 of the present invention is the same as that of Example 1 of the present invention except that the infused milk is prepared and evaluated in an environment of 5 ° C., and Comparative Example 8 is prepared and evaluated in an environment of 5 ° C. It was carried out in the same manner as in Comparative Example 6 except that it was carried out in.
Example 7 of the present invention is the same as that of Example 1 of the present invention except that the infused milk is prepared and evaluated in an environment of 35 ° C., and Comparative Example 9 is prepared and evaluated of infused milk in an environment of 35 ° C. It was carried out in the same manner as in Comparative Example 6 except that it was carried out in.
The results are shown in Table 5 below together with Example 1 of the present invention (environmental temperature: 20 ° C.) and Comparative Example 6 (environmental temperature: 20 ° C.).
石灰石微粉末を含む注入材Ｂ２を用いた比較例８（環境温度：５℃）の注入ミルクは、比較例６（環境温度：２０℃）の注入ミルクと比較して粘度が急激に上昇し、開粒度アスファルト混合物への注入率が低くなった。混合材として石灰石微粉末を含む注入材Ｂ３を用いた比較例９（環境温度：３５℃）の注入ミルクは、比較例６（環境温度：２０℃）の注入ミルクと比較してブリーディング率が急激に上昇した。 The viscosity of the injected milk of Comparative Example 8 (environmental temperature: 5 ° C.) using the injection material B2 containing the limestone fine powder increased sharply as compared with the injected milk of Comparative Example 6 (environmental temperature: 20 ° C.). The injection rate into the open particle asphalt mixture was low. The injection milk of Comparative Example 9 (environmental temperature: 35 ° C.) using the injection material B3 containing limestone fine powder as a mixed material has a sharper bleeding rate than the injection milk of Comparative Example 6 (environmental temperature: 20 ° C.). Ascended to.
これに対して、フライアッシュＡを含む注入材Ａ１を用いた本発明例６（環境温度：５℃）および本発明例７（環境温度：３５℃）の注入ミルクは、粘度、ブリーディング率、開粒度アスファルト混合物への注入率の変動が小さく、またこれらを使用して作製した舗装体の滑り抵抗値も変動が小さくなった。 On the other hand, the injected milk of the present invention example 6 (environmental temperature: 5 ° C.) and the present invention example 7 (environmental temperature: 35 ° C.) using the injection material A1 containing fly ash A has viscosity, bleeding rate, and opening. The variation in the injection rate into the particle size asphalt mixture was small, and the variation in the slip resistance value of the pavement made using these was also small.
［本発明例８〜１１、比較例１０〜１１］
（速硬型半たわみ性舗装用注入材の調製）
上記の表１に示す材料と表２に示すフライアッシュＡとを、下記の表６に示す配合割合で、かつ合計量６０００ｇとなるように計り取ったこと以外は、本発明例１と同様にして、速硬型半たわみ性舗装用注入材（注入材Ａ１０〜Ａ１５）を調製した。
[Examples 8 to 11 of the present invention, Comparative Examples 10 to 11]
(Preparation of quick-hardening semi-flexible pavement injection material)
The same as in Example 1 of the present invention, except that the materials shown in Table 1 and the fly ash A shown in Table 2 were measured in the blending ratios shown in Table 6 below and the total amount was 6000 g. A quick-hardening semi-flexible pavement injection material (injection materials A10 to A15) was prepared.
（半たわみ性舗装用注入ミルクの調製）
上記のようにして調製した速硬型半たわみ性舗装用注入材を用いたこと以外は、本発明例１と同様にして水道水と速硬型半たわみ性舗装用注入材を練り混ぜて、注入ミルクを調製した。
得られた注入ミルクについて、本発明例１と同様の評価を実施した。その結果を、下記の表７に示す。
(Preparation of semi-flexible pavement infused milk)
Except for the fact that the fast-hardening semi-flexible pavement injection material prepared as described above was used, tap water and the fast-hardening semi-flexible pavement injection material were kneaded in the same manner as in Example 1 of the present invention. Infused milk was prepared.
The obtained injected milk was evaluated in the same manner as in Example 1 of the present invention. The results are shown in Table 7 below.
フライアッシュの含有量が本発明の範囲より少ない注入材Ａ１０を用いた比較例１０の注入ミルクは、ブリーディング率が高くなり、その結果、舗装体の滑り抵抗値が低下した。フライアッシュの含有量が本発明の範囲よりも多い注入材Ａ１５を用いた比較例１１の注入ミルクは、圧縮強度と、開粒度アスファルト混合物への注入率が低くなった。 The infused milk of Comparative Example 10 using the injecting material A10 having a fly ash content lower than the range of the present invention had a high bleeding rate, and as a result, the slip resistance value of the pavement decreased. The injected milk of Comparative Example 11 using the injection material A15 having a fly ash content higher than the range of the present invention had a low compressive strength and a low injection rate into the open-grained asphalt mixture.
これに対してフライアッシュの含有量が本発明の範囲にある注入材Ａ１１〜Ａ１４を用いた本発明例８〜１１の注入ミルクでは、フライアッシュの含有量が多くなるに伴って、圧縮強度および開粒度アスファルト混合物への注入率が低くなる傾向が見られたが、実用上問題ない範囲であった。 On the other hand, in the injected milks of Examples 8 to 11 of the present invention using the injection materials A11 to A14 whose fly ash content is within the range of the present invention, the compressive strength and the compressive strength and the content of fly ash increase as the content of fly ash increases. The injection rate into the open-grained asphalt mixture tended to be low, but it was within the range where there was no problem in practical use.
［本発明例１、１２〜１４、比較例１２〜１３］
（速硬型半たわみ性舗装用注入材の調製）
上記の表１に示す材料と表２に示すフライアッシュＡとを、下記の表８に示す配合割合で、かつ合計量６０００ｇとなるように計り取ったこと以外は、本発明例１と同様にして、速硬型半たわみ性舗装用注入材（注入材Ａ１６〜Ａ１７）を調製した。
[Examples 1, 12 to 14 of the present invention, Comparative Examples 12 to 13]
(Preparation of quick-hardening semi-flexible pavement injection material)
The same as in Example 1 of the present invention, except that the materials shown in Table 1 and the fly ash A shown in Table 2 were measured in the blending ratios shown in Table 8 below and the total amount was 6000 g. Then, a quick-hardening semi-flexible pavement injection material (injection materials A16 to A17) was prepared.
（速硬型半たわみ性舗装用注入ミルクの調製）
下記の表９に示す速硬型半たわみ性舗装用注入材を用い、注入材１００質量部に対する水の含有量を下記の表９に示す量としたこと以外は、本発明例１と同様にして水道水と速硬型半たわみ性舗装用注入材を練り混ぜて、注入ミルクを調製した。
得られた注入ミルクについて、本発明例１と同様の評価を実施した。その結果を、本発明例１の結果と共に下記の表９に示す。
(Preparation of quick-hardening semi-flexible pavement infused milk)
The same as in Example 1 of the present invention except that the injection material for fast-hardening semi-flexible pavement shown in Table 9 below was used and the water content per 100 parts by mass of the injection material was set to the amount shown in Table 9 below. Injectable milk was prepared by kneading tap water and a quick-hardening semi-flexible pavement injection material.
The obtained injected milk was evaluated in the same manner as in Example 1 of the present invention. The results are shown in Table 9 below together with the results of Example 1 of the present invention.
水の含有量が本発明の範囲よりも少ない比較例１２の注入ミルクは、Ｐロート流下時間が長く、粘度が高くなり、開粒度アスファルト混合物への注入率が大きく低下した。また、水の含有量が本発明の範囲よりも多い比較例１３の注入ミルクは、ブリーディング率が大きくなり、舗装体の滑り抵抗値が大きく低下した。 The injected milk of Comparative Example 12 having a water content lower than the range of the present invention had a long P-roto flowing time, a high viscosity, and a large decrease in the injection rate into the open-grained asphalt mixture. In addition, the injected milk of Comparative Example 13 having a water content higher than the range of the present invention had a large bleeding rate and a large decrease in the slip resistance value of the pavement.
これに対して、水の含有量が本発明の範囲にある本発明例１、１２〜１４の注入ミルクは、ブリーディング率、開粒度アスファルト混合物への注入率、舗装体の滑り抵抗値のいずれも良好であった。 On the other hand, the injected milks of Examples 1 and 12 to 14 of the present invention having a water content within the range of the present invention have all of the bleeding rate, the injection rate into the open-grained asphalt mixture, and the slip resistance value of the pavement. It was good.
以上の結果から、本発明例によれば、短時間で強度を発現することができ、かつ流動性が高く、強度が発現する前に開粒度アスファルト混合物の空隙に注入することができ、さらに開粒度アスファルト混合物の空隙に注入して形成した舗装体は黒斑が発生しにくい速硬型半たわみ性舗装用注入ミルクおよびその速硬型半たわみ性舗装用注入ミルクの原料として有利に用いることができる速硬型半たわみ性舗装用注入材を提供することが可能となることが確認された。 From the above results, according to the example of the present invention, the strength can be developed in a short time, the fluidity is high, and the asphalt mixture can be injected into the voids of the open particle size asphalt mixture before the strength is developed, and further opened. The pavement formed by injecting into the voids of the particle size asphalt mixture can be advantageously used as a raw material for the quick-hardening semi-flexible pavement injection milk and the quick-hardening semi-flexible pavement injection milk in which black spots are less likely to occur. It was confirmed that it is possible to provide an injection material for quick-hardening semi-flexible pavement that can be used.
Claims (6)
前記ポルトランドセメントと速硬性混和材の合計量１００質量部に対する前記フライアッシュの含有量が５質量部以上７０質量部以下の範囲内にあり、
前記フライアッシュは、ハンター表色系におけるＬ値が５０．０以上であって、強熱減量が４．０質量％以下であり、メチレンブルー吸着量が０．８０ｍｇ／ｇ以下であって、分級精度指数к（Ｄ２５／Ｄ７５）が０．６以上０．７以下の範囲内にあることを特徴とする速硬型半たわみ性舗装用注入材。 A quick-hardening semi-flexible pavement injection material containing Portland cement, quick-hardening admixture, fine aggregate, fly ash, re-emulsified powder resin, defoaming agent, and coagulation adjuster.
The content of the fly ash with respect to 100 parts by mass of the total amount of the Portland cement and the fast-curing admixture is in the range of 5 parts by mass or more and 70 parts by mass or less.
The fly ash is a by L value in Hunter color system is 50.0 or more, the loss on ignition is less 4.0 wt%, methylene blue adsorption amount I der following 0.80 mg / g, classification accuracy index к (D25 / D75) is rapid-type semi-flexible paving grout, characterized in near Rukoto the range of 0.6 to 0.7.
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