JP2015127285A - Premix grout composition - Google Patents
Premix grout composition Download PDFInfo
- Publication number
- JP2015127285A JP2015127285A JP2013273635A JP2013273635A JP2015127285A JP 2015127285 A JP2015127285 A JP 2015127285A JP 2013273635 A JP2013273635 A JP 2013273635A JP 2013273635 A JP2013273635 A JP 2013273635A JP 2015127285 A JP2015127285 A JP 2015127285A
- Authority
- JP
- Japan
- Prior art keywords
- mass
- cement
- aggregate
- grout
- premix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011440 grout Substances 0.000 title claims abstract description 87
- 239000000203 mixture Substances 0.000 title claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 80
- 239000004568 cement Substances 0.000 claims abstract description 50
- 239000012615 aggregate Substances 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 32
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- 239000002562 thickening agent Substances 0.000 claims description 14
- 239000011230 binding agent Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 abstract description 18
- 230000007774 longterm Effects 0.000 abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 34
- 239000000843 powder Substances 0.000 description 21
- 238000012360 testing method Methods 0.000 description 19
- 239000004567 concrete Substances 0.000 description 18
- 238000004898 kneading Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 17
- 238000001035 drying Methods 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- 239000000047 product Substances 0.000 description 13
- 208000032843 Hemorrhage Diseases 0.000 description 11
- 208000034158 bleeding Diseases 0.000 description 11
- 230000000740 bleeding effect Effects 0.000 description 10
- 229920002472 Starch Polymers 0.000 description 9
- 239000003638 chemical reducing agent Substances 0.000 description 9
- 230000036571 hydration Effects 0.000 description 9
- 238000006703 hydration reaction Methods 0.000 description 9
- 239000008107 starch Substances 0.000 description 9
- 235000019698 starch Nutrition 0.000 description 9
- 239000004088 foaming agent Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229910001653 ettringite Inorganic materials 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- 235000012241 calcium silicate Nutrition 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 229910021487 silica fume Inorganic materials 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 230000036962 time dependent Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000007580 dry-mixing Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 229920013819 hydroxyethyl ethylcellulose Polymers 0.000 description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 2
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- -1 setting retarders Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920002498 Beta-glucan Polymers 0.000 description 1
- 229920001612 Hydroxyethyl starch Polymers 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004373 Pullulan Substances 0.000 description 1
- 229920001218 Pullulan Polymers 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229920002310 Welan gum Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 229960001126 alginic acid Drugs 0.000 description 1
- 150000004781 alginic acids Chemical class 0.000 description 1
- 229920013820 alkyl cellulose Polymers 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 229910001576 calcium mineral Inorganic materials 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000007789 gas Substances 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
- 239000011396 hydraulic cement Substances 0.000 description 1
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 description 1
- 239000001341 hydroxy propyl starch Substances 0.000 description 1
- 229940050526 hydroxyethylstarch Drugs 0.000 description 1
- 235000013828 hydroxypropyl starch Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000004804 polysaccharides Chemical class 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 235000019423 pullulan Nutrition 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Abstract
Description
本発明は、プレミックスグラウト組成物に関する。詳しくは、細骨材の含有率が高いにも拘らず、流動性に優れ、材料分離が起こり難いグラウト材が得られるグラウト組成物に関する。 The present invention relates to a premix grout composition. More specifically, the present invention relates to a grout composition that provides a grout material that is excellent in fluidity and hardly separates in spite of a high content of fine aggregates.
鉄筋コンクリート構造物を対象とした耐震補強工法としては、ブレース工法、増設壁工法、巻き立て工法など様々な耐震補強工法がある。これらの耐震補強工法に、グラウトモルタル（例えば、特許文献１〜３参照）が使用されている。また、グラウトモルタルは、補強工事だけではなく、新設の土木構造物や建築構造物等にも多く用いられている。これらのグラウトモルタルとして、セメント、細骨材及び混和材料を予め乾式混合したプレミックスモルタルのグラウトモルタル組成物、即ち、プレミックスグラウト組成物が用いられることも多い。このプレミックス化したプレミックスグラウト組成物は、所定量の水を加え、グラウトミキサやハンドミキサ等のミキサで混練することで、簡単に、流動性に優れ材料分離が起こり難い品質の安定したグラウトモルタルが得られるという点が優れている。
There are various seismic reinforcement methods for reinforced concrete structures such as brace method, additional wall method, and winding method. Grout mortar (see, for example,
ところで、建築工事標準仕様書・同解説ＪＡＳＳ５「鉄筋コンクリート工事」において、特記がない場合の計画供用期間の級が長期および超長期のコンクリートにおけるコンクリートの乾燥収縮率は８×１０−４以下（８００μ以下）と定められている。一般的なモルタルや市販のプレミックスされた無収縮モルタルの乾燥収縮率は、材齢６ヶ月において８００〜１６００μ程度である。このため、市販のプレミックスされた無収縮モルタルを、建築工事における一般的な鉄筋コンクリートのコンクリートとして用いるには、工事監理者の承認が必要であった。そこで、工事監理者の承認が不要なプレミックスされたグラウトモルタル組成物、即ち、長期における乾燥収縮率が８００μ以下であるプレミックスされたグラウトモルタル組成物が望まれていた。更に、昨今では、コンクリートミキサー車が入ることができない狭小部や小規模なコンクリート打設箇所に、コンクリートの替わりとして打設することが出来るプレミックスグラウト組成物の要望もある。 By the way, building in construction standard specifications, the same commentary JASS5 "Reinforced Concrete", drying shrinkage of the concrete class of plan service period in the case where there is no special mention is in the long-term and super-long-term concrete is 8 × 10 -4 or less (800μ below ). The dry shrinkage rate of general mortars and commercially available premixed non-shrink mortars is about 800 to 1600 μm at the age of 6 months. For this reason, in order to use a commercially available premixed non-shrink mortar as a general reinforced concrete in construction work, the approval of the construction supervisor was required. Therefore, a premixed grout mortar composition that does not require the approval of a construction supervisor, that is, a premixed grout mortar composition having a drying shrinkage ratio of 800 μm or less over the long term has been desired. Further, there is a demand for a premix grout composition that can be placed as a substitute for concrete in a narrow portion or a small-scale concrete placement site where a concrete mixer truck cannot enter.
本発明は前記問題の解決、即ち、本発明は、長期における乾燥収縮率が８００μ以下であり、流動性に優れ、材料分離が起こり難いプレミックスグラウト組成物を提供することを目的とする。 The object of the present invention is to provide a premix grout composition that solves the above-mentioned problems, that is, has a dry shrinkage ratio of 800 μm or less over a long period of time, has excellent fluidity, and hardly causes material separation.
本発明者は、前記課題解決のため鋭意検討した結果、セメント、膨張材、骨材、セメント分散剤及び増粘剤を含有し、骨材が特定粒度の骨材であることにより、上記課題を解決できることを見出し、本発明を完成させた。即ち、本発明は、以下の（１）〜（２）で表すプレミックスグラウト組成物である。
（１）セメント、膨張材、骨材、セメント分散剤及び増粘剤を含有し、前記骨材が４ｍｍを超え１０ｍｍ以下の粒子の含有率が１５〜４５質量％であり、結合材の質量に対する骨材の含有比率（ａ／Ｐ）が質量比で１．８〜３．０であることを特徴とするプレミックスグラウト組成物。
（２）セメントを２０〜３５質量％、膨張材を１〜７質量％、セメント分散剤を０．０３〜３質量％、増粘剤を０．０００２〜０．０２質量％含有することを特徴とする上記（１）のプレミックスグラウト組成物。
As a result of intensive studies for solving the above problems, the inventor contains cement, an expansion material, an aggregate, a cement dispersant, and a thickener, and the aggregate is an aggregate having a specific particle size. The inventors have found that this can be solved and completed the present invention. That is, this invention is the premix grout composition represented by the following (1)-(2).
(1) Containing cement, expansion material, aggregate, cement dispersant and thickener, the aggregate content of particles exceeding 4 mm and not more than 10 mm is 15 to 45% by mass, based on the mass of the binder A premix grout composition, wherein the aggregate content ratio (a / P) is 1.8 to 3.0 in terms of mass ratio.
(2) 20 to 35% by mass of cement, 1 to 7% by mass of an expansion material, 0.03 to 3% by mass of a cement dispersant, and 0.0002 to 0.02% by mass of a thickener. The premix grout composition according to (1) above.
本発明によれば、長期における乾燥収縮率が８００μ以下であり、流動性に優れ、材料分離が起こり難いプレミックスグラウト組成物が得られる。本発明によれば、長期における乾燥収縮率が８００μ以下で工事監理者の承認が不要なプレミックスされたグラウトモルタル組成物が得られる。また、本発明によれば、コンクリートの替わりとして打設することが出来るプレミックスグラウト組成物が得られる。 According to the present invention, it is possible to obtain a premix grout composition having a drying shrinkage ratio of 800 μm or less over a long period of time, excellent fluidity, and hardly causing material separation. According to the present invention, a premixed grout mortar composition having a long-term drying shrinkage of 800 μm or less and not requiring the approval of a construction supervisor is obtained. Moreover, according to this invention, the premix grout composition which can be cast | placed instead of concrete is obtained.
本発明に用いるセメントは、水硬性セメントであればよく、例えば普通、早強、超早強、低熱及び中庸熱の各種ポルトランドセメント、エコセメント及びポルトランドセメントに含まれないビーライトセメント等のケイ酸カルシウム鉱物を主成分とするセメント（ケイ酸カルシウム鉱物を５０質量％以上含むセメント）、並びに、これらのケイ酸カルシウム鉱物を主成分とするセメントに、フライアッシュ、高炉スラグ粉末、シリカフューム又は石灰石微粉末等を混合した各種混合セメント、太平洋セメント社製「スーパージェットセメント」（商品名）や住友大阪セメント社製「ジェットセメント」（商品名）等の超速硬セメント、アルミナセメント等が挙げられ、これらの一種又は二種以上を使用することができる。ワービリティを損ない難く可使時間が長く確保し易いことから、各種ポルトランドセメント、エコセメント及び各種混合セメントから選ばれる一種又は二種以上を使用することが好ましい。また、本発明のプレミックスグラウト組成物には、セメントを２０〜３５質量％含有させることが、乾燥収縮が小さく、水和熱による温度上昇が小さく且つ強度発現性に優れる（圧縮強度が高い）ことから好ましい。２０質量％未満では強度発現性が劣り（圧縮強度が小さく）、３５質量％を超えると、乾燥収縮が大きく又は水和熱による温度上昇が大きい。より乾燥収縮が小さく、水和熱による温度上昇が小さく且つ強度発現性に優れる（圧縮強度が高い）ことから、より好ましいセメント含有率は、２５〜３０質量％とする。 The cement used in the present invention may be a hydraulic cement, for example, ordinary, early strength, ultra-early strength, low heat and moderate heat Portland cement, eco-cement, and belite cement not included in Portland cement. Cement containing calcium mineral as a main component (cement containing 50 mass% or more calcium silicate mineral), and cement containing these calcium silicate minerals as main components, fly ash, blast furnace slag powder, silica fume, or limestone fine powder Etc., various super-hard cements such as “Super Jet Cement” (trade name) manufactured by Taiheiyo Cement Co., Ltd., “Jet Cement” (trade name) manufactured by Sumitomo Osaka Cement Co., etc. One kind or two or more kinds can be used. It is preferable to use one or two or more selected from various Portland cements, eco-cements, and various mixed cements because it is difficult to impair the workability and it is easy to ensure a long pot life. In addition, the premix grout composition of the present invention contains 20 to 35% by mass of cement, so that drying shrinkage is small, temperature rise due to heat of hydration is small, and strength development is excellent (high compressive strength). This is preferable. If it is less than 20% by mass, strength development is inferior (compressive strength is small), and if it exceeds 35% by mass, drying shrinkage is large or temperature rise due to heat of hydration is large. Since the drying shrinkage is smaller, the temperature rise due to heat of hydration is small, and the strength development is excellent (compressive strength is high), the more preferable cement content is 25 to 30% by mass.
本発明に用いる膨張材としては、水和により例えば水酸化カルシウムやエトリンガイト等の水和物の結晶が成長し、嵩体積が大きくなる物質を主要成分とするものであれば何れのものでも良く、具体的には、生石灰、カルシウムサルホアルミネート、無水石膏、マグネシア、石灰系膨張材、エトリンガイト系膨張材等が好適な例として挙げられ、これら又はこれらに類する物質の一種又は二種以上を使用することが可能である。用いる膨張材としては、ＪＩＳ Ａ ６２０２「コンクリート用膨張材 」に適合する膨張材が、混和量に対する膨張率が安定しているので特に好ましい。膨張材の含有率は、１〜７質量％とすることが好ましい。１質量％未満では膨張材の効果が得られ難く収縮が大きく、７質量％を超えると拘束されていない部分に強度低下が起こる虞がある。より好ましい膨張材の含有率は、収縮が小さく（長さ変化率が大きく）、高い圧縮強度が得られ易いことから、１．２〜３．５質量％とする。 As the expansion material used in the present invention, any material may be used as long as a hydrated crystal such as calcium hydroxide or ettringite grows by hydration and a substance having a large bulk volume is used as a main component. Specifically, quick lime, calcium sulfoaluminate, anhydrous gypsum, magnesia, lime-based expansive material, ettringite-based expansive material and the like are preferable examples, and one or two or more of these or similar substances are used. It is possible. As the expansion material to be used, an expansion material that conforms to JIS A 6202 “Expansion material for concrete” is particularly preferable because the expansion coefficient relative to the amount of mixing is stable. The content of the expansion material is preferably 1 to 7% by mass. If the amount is less than 1% by mass, the effect of the expandable material is difficult to obtain, and the shrinkage is large. If the amount exceeds 7% by mass, the strength may be lowered in an unconstrained portion. A more preferable content of the expansion material is set to 1.2 to 3.5% by mass because shrinkage is small (the rate of change in length is large) and high compressive strength is easily obtained.
本発明に用いる増粘剤としては、例えばヒドロキシエチルセルロース（ＨＥＣ）、ヒドロキシプロピルセルロース（ＨＰＣ）等のヒドロキシアルキルセルロース、或いは、ヒドロキシエチルメチルセルロース(ＨＥＭＣ)、ヒドロキシプロピルメチルセルロース(ＨＰＭＣ)、ヒドロキシエチルエチルセルロース(ＨＥＥＣ)等のヒドロキシアルキルアルキルセルロース等の水溶性セルロース；アルギン酸、β−１，３グルカン、プルラン、ウェランガム等の多糖類；アクリル樹脂やポリビニルアルコール等のポリビニル化合物；メチルスターチ，エチルスターチ，プロピルスターチ又はメチルプロピルスターチ等のアルキルスターチ、ヒドロキシエチルスターチ又はヒドロキシプロピルスターチ等のヒドロキシアルキルスターチ、或いは、ヒドロキシプロピルメチルスターチ等のヒドロキシアルキルアルキルスターチ等スターチエーテル等が挙げられ、これらの一種又は二種以上の使用が可能である。また、本発明に用いる増粘剤としては、プレミックスし易いことから、粉末のもの（粉末増粘剤）が好ましい。増粘剤の含有率は０．０００２〜０．０２質量％とすることが流動性の確保及び材料分離抵抗性が得られることから好ましい。０．０００２質量％未満では増粘剤を含有する効果が得られ難く材料分離抵抗性が低い。また、０．０２質量％を超えると、流動性が悪く且つ低温環境下で大きく遅延する虞がある。 Examples of the thickener used in the present invention include hydroxyalkyl celluloses such as hydroxyethyl cellulose (HEC) and hydroxypropyl cellulose (HPC), or hydroxyethyl methyl cellulose (HEMC), hydroxypropyl methyl cellulose (HPMC), and hydroxyethyl ethyl cellulose (HEEC). Water-soluble cellulose such as hydroxyalkyl alkyl cellulose; polysaccharides such as alginic acid, β-1,3 glucan, pullulan and welan gum; polyvinyl compounds such as acrylic resin and polyvinyl alcohol; methyl starch, ethyl starch, propyl starch or methyl Alkyl starch such as propyl starch, hydroxyalkyl starch such as hydroxyethyl starch or hydroxypropyl starch, or hydroxy Hydroxyalkyl alkyl starch such as starch ethers such as propyl starch and the like, it is possible to use alone or in combination. Moreover, as a thickener used for this invention, since it is easy to premix, the thing of a powder (powder thickener) is preferable. The content of the thickener is preferably 0.0002 to 0.02% by mass because securing fluidity and material separation resistance can be obtained. If it is less than 0.0002 mass%, it is difficult to obtain the effect of containing a thickener, and the material separation resistance is low. Moreover, when it exceeds 0.02 mass%, there exists a possibility that fluidity | liquidity may be bad and may be greatly delayed in a low temperature environment.
また、本発明に用いるセメント分散剤としては、特に限定されず、減水剤、高性能減水剤、ＡＥ減水剤、高性能ＡＥ減水剤、流動化剤等を用いることができ、例えば、ポリカルボン酸塩系セメント分散剤、ナフタレンスルホン酸塩系セメント分散剤、メラミンスルホン酸塩系セメント分散剤及びリグニンスルホン酸塩系セメント分散剤が挙げられ、これらの１種又は２種以上を用いることができる。用いるセメント分散剤としては、粉末状高性能減水剤又は粉末状高性能ＡＥ減水剤を用いると、グラウトモルタルの材齢２８日における圧縮強度を４５Ｎ／ｍｍ２以上とし易いことから好ましい。また、本発明に用いるセメント分散剤としては、プレミックスし易いことから、粉末のもの（粉末セメント分散剤）が好ましい。セメント分散剤の含有率は、０．０３〜３質量％とすることが高い流動性が得られ且つ材慮分離し難いことから好ましい。より高い流動性が得られ易く且つブリーディングが発生し難く材料分離抵抗性に優れることから、セメント分散剤の含有率は、０．０８〜１．８質量％とすることがより好ましい。 Further, the cement dispersant used in the present invention is not particularly limited, and water reducing agents, high performance water reducing agents, AE water reducing agents, high performance AE water reducing agents, fluidizing agents, and the like can be used. For example, polycarboxylic acid Examples thereof include a salt-based cement dispersant, a naphthalene sulfonate-based cement dispersant, a melamine sulfonate-based cement dispersant, and a lignin sulfonate-based cement dispersant, and one or more of these can be used. As the cement dispersant to be used, it is preferable to use a powdery high-performance water reducing agent or a powdery high-performance AE water reducing agent because the compressive strength of the grout mortar at the age of 28 days is easily 45 N / mm 2 or more. The cement dispersant used in the present invention is preferably a powder (powder cement dispersant) because it is easy to premix. The content of the cement dispersant is preferably 0.03 to 3% by mass because high fluidity is obtained and material separation is difficult. It is more preferable that the content of the cement dispersant is 0.08 to 1.8% by mass because higher fluidity is easily obtained and bleeding is less likely to occur and the material separation resistance is excellent.
本発明に用いる膨張材としては、水和により例えば水酸化カルシウムやエトリンガイト等の水和物の結晶が成長し、嵩体積が大きくなる物質を主要成分とするものであれば何れのものでも良く、具体的には、生石灰、カルシウムサルホアルミネート、無水石膏、マグネシア、石灰系膨張材、エトリンガイト系膨張材等が好適な例として挙げられ、これら又はこれらに類する物質の一種又は二種以上を使用することが可能である。用いる膨張材としては、ＪＩＳ Ａ ６２０２「コンクリート用膨張材 」に適合する膨張材が、混和量に対する膨張率が安定しているので特に好ましい。膨張材の混和量は、無機質結合材１００質量部に対し、３〜１２質量部とすることが好ましい。３質量部未満では膨張材の効果が得られ難く、１２質量部を超えると拘束されていない部分の強度が不足する虞がある。より好ましい膨張材の混和量は、無機質結合材１００質量部に対し、５〜９質量部とする。 As the expansion material used in the present invention, any material may be used as long as a hydrated crystal such as calcium hydroxide or ettringite grows by hydration and a substance having a large bulk volume is used as a main component. Specifically, quick lime, calcium sulfoaluminate, anhydrous gypsum, magnesia, lime-based expansive material, ettringite-based expansive material and the like are preferable examples, and one or two or more of these or similar substances are used. It is possible. As the expansion material to be used, an expansion material that conforms to JIS A 6202 “Expansion material for concrete” is particularly preferable because the expansion coefficient relative to the amount of mixing is stable. The mixing amount of the expansion material is preferably 3 to 12 parts by mass with respect to 100 parts by mass of the inorganic binder. If the amount is less than 3 parts by mass, it is difficult to obtain the effect of the expanding material. If the amount exceeds 12 parts by mass, the strength of the unconstrained portion may be insufficient. A more preferable mixing amount of the expansion material is 5 to 9 parts by mass with respect to 100 parts by mass of the inorganic binder.
本発明に用いる発泡剤としては、粉末発泡剤であれば特に限定されず、具体的には水と混練後に気体を発生する粉末であればよい。この発泡作用によりグラウトモルタルの沈下現象を防止し、既設の壁や柱等の部材並びに新規に設置する部材とより一体化することができる。即ち、無収縮性が得られる。その具体例として、例えば、アルミニウムや亜鉛等の両性金属の粉末や粉末状過酸化物質等が挙げられる。なかでも、効果的に発泡することができるので、アルミニウム粉末が好ましい。発泡剤の含有率は、０．０００２〜０．０３質量％とすることが、効果的な発泡作用を発揮し且つ強度低下を起こし難いことから好ましい。０．０００２質量％未満では発泡剤の効果が得られ難い。また、０．０３質量％を超えると、特に高温環境下において膨張過多となり、圧縮強度の低下も懸念される。 The foaming agent used in the present invention is not particularly limited as long as it is a powder foaming agent. Specifically, it may be any powder that generates gas after being kneaded with water. This foaming action prevents the grouting mortar from sinking and can be integrated with existing members such as walls and pillars and newly installed members. That is, non-shrinkage is obtained. Specific examples thereof include amphoteric metal powders such as aluminum and zinc, and powdered peroxides. Among these, aluminum powder is preferable because it can effectively foam. The content of the foaming agent is preferably 0.0002 to 0.03% by mass because it exhibits an effective foaming action and hardly lowers the strength. If it is less than 0.0002 mass%, it is difficult to obtain the effect of the foaming agent. Moreover, when it exceeds 0.03 mass%, it will be excessively expanded especially in a high temperature environment, and there is also concern about the fall of compressive strength.
本発明に用いる骨材としては、４ｍｍを超え１０ｍｍ以下の粒子の含有率が１５〜４５質量％の骨材とする。４ｍｍを超え１０ｍｍ以下の粒子の含有率が１５質量％未満であると、乾燥収縮が大きく、水和熱による温度上昇が大きい。また、４ｍｍを超え１０ｍｍ以下の粒子の含有率が４５質量％を超えると、材料分離抵抗性に劣り、ブリーディングが発生し易いので好ましくない。骨材中の４ｍｍを超え１０ｍｍ以下の粒子の含有率は、より好ましくは１８〜４０質量％とする。また、本発明に用いる骨材としては、０．３ｍｍを超え４ｍｍ以下の粒子が４０〜６５質量％であると、高い流動性が得られ易く、材料分離抵抗性に優れることから好ましく、更には、当該粒径の粒子が４２〜６３質量％であるとより好ましい。また、本発明に用いる骨材としては、０．３ｍｍを超え２．５ｍｍ以下の粒子が３０〜５５質量％であると、高い流動性が得られ易く、材料分離抵抗性に優れることから好ましく、更には、当該粒径の粒子が３３〜５４質量％であるとより好ましい。また、本発明に用いる骨材としては、０．３ｍｍ以下の粒子が１〜４５質量％であると、高い流動性が得られ易く、材料分離抵抗性に優れることから好ましく、更には、当該粒径の粒子が５〜３０質量％であるとより好ましい。また、本発明に用いる骨材としては、０．１５ｍｍ以下の粒子が１０質量％以下であると、高い流動性が得られ易く、材料分離抵抗性に優れることから好ましく、更には、当該粒径の粒子が１〜６質量％であるとより好ましい。 The aggregate used in the present invention is an aggregate having a particle content of more than 4 mm and not more than 10 mm with a content of 15 to 45% by mass. When the content ratio of particles exceeding 4 mm and not more than 10 mm is less than 15% by mass, drying shrinkage is large, and the temperature rise due to heat of hydration is large. On the other hand, when the content of particles exceeding 4 mm and not exceeding 10 mm exceeds 45% by mass, the material separation resistance is inferior and bleeding is likely to occur. More preferably, the content ratio of particles exceeding 4 mm and not more than 10 mm in the aggregate is 18 to 40% by mass. Further, as the aggregate used in the present invention, it is preferable that particles having a particle size of more than 0.3 mm and 4 mm or less are 40 to 65% by mass because high fluidity can be easily obtained and the material separation resistance is excellent. The particle size is more preferably 42 to 63% by mass. Moreover, as an aggregate used in the present invention, particles having a particle size of more than 0.3 mm and not more than 2.5 mm are preferably 30 to 55% by mass because high fluidity is easily obtained and excellent material separation resistance is preferable. Furthermore, it is more preferable that the particle size is 33 to 54% by mass. Moreover, as an aggregate used in the present invention, it is preferable that particles having a size of 0.3 mm or less are 1 to 45% by mass because high fluidity is easily obtained and material separation resistance is excellent. More preferably, the particle size is 5 to 30% by mass. Further, as the aggregate used in the present invention, it is preferable that particles of 0.15 mm or less are 10% by mass or less because high fluidity is easily obtained and the material separation resistance is excellent. It is more preferable that the particles are 1 to 6% by mass.
本発明で用いる骨材の材質としては、特に限定されず、例えば、川砂、陸砂、海砂、砕砂、珪砂、人工骨材、スラグ骨材などを用いることができる。本発明で用いる骨材の材質として、吸水率の大きい軽量骨材は、乾燥収縮が大きくなることからあまり好ましくない。また、本発明において含有する４ｍｍを超える粒径の骨材は、高い流動性を得るために、豆砂利と呼ばれている丸みを帯びた形状のものが好ましい。本発明において１０ｍｍを超える粒子とは、公称呼び寸法１０ｍｍ（公称目開き（以下「目開き」と云う。）９．５ｍｍ）の篩に留まる粒子を云う。また、４ｍｍを超え１０ｍｍ以下の粒子とは、目開き４ｍｍの篩に留まり且つ目開き９．５ｍｍの篩を通過する粒子を云い、また、０．３ｍｍを超え４ｍｍ以下の粒子とは、目開き０．３ｍｍの篩に留まり且つ目開き４ｍｍの篩を通過する粒子を云い、また、０．３ｍｍを超え２．５ｍｍ以下の粒子とは、目開き０．３ｍｍの篩に留まり且つ目開き２．３６ｍｍの篩を通過する粒子を云い、また、０．３ｍｍ以下の粒子とは、目開き０．３ｍｍの篩を通過する粒子を云い、また、０，１５ｍｍ以下の粒子とは、目開き０．１５ｍｍの篩を通過する粒子を云う。 The material of the aggregate used in the present invention is not particularly limited, and for example, river sand, land sand, sea sand, crushed sand, quartz sand, artificial aggregate, slag aggregate and the like can be used. As a material for the aggregate used in the present invention, a lightweight aggregate having a large water absorption rate is not preferred because the drying shrinkage becomes large. Further, the aggregate having a particle diameter exceeding 4 mm contained in the present invention preferably has a rounded shape called bean gravel in order to obtain high fluidity. In the present invention, particles exceeding 10 mm refer to particles that remain on a sieve having a nominal nominal size of 10 mm (nominal opening (hereinafter referred to as “opening”) 9.5 mm). Moreover, the particle | grains exceeding 4 mm and 10 mm or less mean the particle | grains which remain on the sieve of 4 mm of openings, and pass the sieve of 9.5 mm of openings, and the particle | grains exceeding 0.3 mm and 4 mm or less are openings. 1. Particles that remain on a 0.3 mm sieve and pass through a sieve having a 4 mm aperture, and particles that exceed 0.3 mm and not more than 2.5 mm are those that remain on the 0.3 mm sieve and have an aperture of 2. Particles passing through a 36 mm sieve are referred to. Particles having a diameter of 0.3 mm or less refer to particles passing through a sieve having a mesh opening of 0.3 mm. Particles that pass through a 15 mm sieve.
本発明のプレミックスグラウト組成物において、含まれる結合材の質量（Ｂ）に対する骨材質量（ａ）の含有比率（ａ／Ｂ）が質量比で１．８〜３．０であることが、乾燥収縮が小さく、材料分離し難く且つ水和熱による温度上昇が小さいことから好ましい。ａ／Ｂが１．８未満では、単位セメント量が増加するため、乾燥収縮低減効果及び水和発熱抑制の低減効果が乏しくなり、ａ／Ｂが３．０を超えると材料分離抵抗性に劣り、ブリーディングが発生する虞が高まる。乾燥収縮が小さく、材料分離し難く且つ水和熱による温度上昇が小さいことから、より好ましくは、ａ／Ｂを２．２〜２．６とする。ここで、結合材（Ｂ）には、セメント、石膏、シリカフュームやメタカオリン等のポゾラン、高炉スラグ粉末等の潜在水硬性物質及び膨張材が含まれる。 In the premix grout composition of the present invention, the content ratio (a / B) of the aggregate mass (a) to the mass (B) of the binder contained is 1.8 to 3.0 in terms of mass ratio. This is preferable because the drying shrinkage is small, the material is difficult to separate, and the temperature rise due to heat of hydration is small. If a / B is less than 1.8, the amount of unit cement increases, so the drying shrinkage reducing effect and the effect of suppressing hydration heat generation are poor. If a / B exceeds 3.0, the material separation resistance is poor. The risk of bleeding is increased. More preferably, a / B is set to 2.2 to 2.6 because drying shrinkage is small, material separation is difficult, and temperature rise due to heat of hydration is small. Here, the binder (B) includes cement, gypsum, pozzolanes such as silica fume and metakaolin, and latent hydraulic substances such as blast furnace slag powder and an expansion material.
本発明のプレミックスグラウト組成物には、上記セメント、膨張材、骨材、セメント分散剤、増粘剤及び発泡剤以外に、他の混和材料から選ばれる一種又は二種以上を本発明の効果を実質損なわない範囲で併用することができる。この混和材料としては、例えばセメント用ポリマー、消泡剤、防水材、防錆剤、収縮低減剤、保水剤、顔料、繊維、撥水剤、白華防止剤、急結剤（材）、急硬剤（材）、凝結遅延剤、空気連行剤、表面硬化剤、高炉スラグ粉末等のスラグ粉末、シリカフュームやフライアッシュ等のポゾラン等が挙げられる。また、本発明で使用される混和材料は、粉末状でも液状でも使用可能であるが、液状の混和材料の場合には、他の粉体又は顆粒状の成分（担体）に吸着させ見かけ上粉体状又は顆粒状とした上で用いることが好ましい。ここで用いる担体としては、シリカ粉末等の他、セメント、骨材或いは粉末状又は顆粒状の混和材料を用いてもよい。 In the premix grout composition of the present invention, in addition to the cement, the expansion material, the aggregate, the cement dispersant, the thickener, and the foaming agent, one or two or more kinds selected from other admixtures can be obtained. Can be used in a range that does not substantially impair. Examples of this admixture include polymers for cement, antifoaming agents, waterproofing materials, rust preventives, shrinkage reducing agents, water retention agents, pigments, fibers, water repellents, whitening agents, quick setting agents (materials), Examples thereof include hardeners (materials), setting retarders, air entraining agents, surface hardeners, slag powders such as blast furnace slag powder, and pozzolans such as silica fume and fly ash. The admixture used in the present invention can be used in the form of powder or liquid, but in the case of liquid admixture, it is adsorbed on other powder or granular components (carrier) and apparently powder. It is preferable to use it after making it into a body or granule. As the carrier used here, in addition to silica powder and the like, cement, aggregate, or powder or granular admixture may be used.
本発明のプレミックスグラウト組成物は、Ｖ型混合機や可傾式コンクリートミキサ等の重力式ミキサ、ヘンシェル式ミキサ、パドルミキサ、リボンミキサ等のミキサにより、所定量の上記各材料を予め混合する方が、添加後のグラウト組成物において材料の偏在が抑えられることから好ましい。このとき用いるミキサは、連続式ミキサでもバッチ式ミキサでも良い。各材料のミキサ内への投入順序は特に限定されない。一種ずつ添加してもよく、一部又は全部を同時に添加してもよい。また、袋やポリエチレン製容器等の容器に各材料を計り取り投入する方法により、本発明のプレミックスグラウト組成物を製造することもできる。本発明のプレミックスグラウト組成物の配合成分には、一般の無収縮モルタルのものとは異なり、４〜１０ｍｍと比較的大きな粒径の骨材が含有する。そのため、各材料の分散性の向上や骨材の偏在を抑制させるため、比較的せん断作用が小さく、パドルや羽根等による掻き落としによる分散作用や拡散作用を主として混合するリボンミキサやパドルミキサー等、或いは重力式ミキサで材料を混合することでプレミックス化させ、本発明のプレミックスグラウト組成物を製造することが好ましい。せん断作用の大きいヘンシェルミキサー又は材料を吹き上げ対流させる形式の噴射型ミキサー等は、材料の分散性の観点からあまり好ましくない。 The premix grout composition of the present invention is a method in which a predetermined amount of each of the above materials is mixed in advance using a V-type mixer, a gravitational mixer such as a tiltable concrete mixer, a Henschel mixer, a paddle mixer, a ribbon mixer or the like. However, it is preferable because uneven distribution of the material is suppressed in the grout composition after the addition. The mixer used at this time may be a continuous mixer or a batch mixer. The order in which each material is charged into the mixer is not particularly limited. One by one may be added, or part or all may be added simultaneously. Moreover, the premix grout composition of this invention can also be manufactured by the method of measuring and throwing each material into containers, such as a bag and a polyethylene container. Unlike the general non-shrink mortar, the blending component of the premix grout composition of the present invention contains an aggregate having a relatively large particle size of 4 to 10 mm. Therefore, in order to suppress the dispersibility improvement of each material and the uneven distribution of aggregate, a relatively small shearing action, such as a ribbon mixer or a paddle mixer that mainly mixes a dispersing action or a diffusing action by scraping with paddles or blades, etc. Alternatively, it is preferable to prepare the premix grout composition of the present invention by premixing the materials by mixing them with a gravity mixer. A Henschel mixer having a large shearing action or an injection type mixer that blows and convects a material is not preferable from the viewpoint of dispersibility of the material.
本発明のプレミックスグラウト組成物は、プレミックスグラウト組成物（粉体：Ｐ）１００質量部に対し８〜２０質量部の水（Ｗ）と混練して用いる、即ち、水プレミックスグラウト組成物（粉体）比（Ｗ／Ｐ）８〜２０％とすることが好ましい。このときの水量は、水性の液状混和材料（例えば液体減水剤やゴムラテックス。）を添加する場合は、グラウト組成物に添加する水性の液状混和材料に含まれる水の量も考慮する。８質量部未満では高い流動性が得られ難く、２０質量部を超えると材料分離を起こす虞が高まり、乾燥収縮が大きい虞がある。より流動性が高く且つ材料分離し難難いことから、プレミックスグラウト組成物（粉体）１００質量部に対する水量は、８〜１８質量部とすること、即ちＷ／Ｐ８〜１８％とすることがより好ましく、更には１０〜１２質量部とすること、即ちＷ／Ｐ１０〜１２％とすることが最も好ましい。 The premix grout composition of the present invention is used by kneading with 8 to 20 parts by mass of water (W) with respect to 100 parts by mass of the premix grout composition (powder: P), that is, the water premix grout composition. The (powder) ratio (W / P) is preferably 8 to 20%. The amount of water at this time also takes into account the amount of water contained in the aqueous liquid admixture added to the grout composition when an aqueous liquid admixture (for example, a liquid water reducing agent or rubber latex) is added. If the amount is less than 8 parts by mass, it is difficult to obtain high fluidity. If the amount exceeds 20 parts by mass, the possibility of material separation increases and drying shrinkage may be large. Since the fluidity is higher and it is difficult to separate the materials, the amount of water with respect to 100 parts by mass of the premix grout composition (powder) is 8 to 18 parts by mass, that is, W / P is 8 to 18%. More preferably, it is more preferably 10 to 12 parts by mass, that is, W / P is most preferably 10 to 12%.
また、本発明のプレミックスグラウト組成物に水を加え混練することでグラウト材を製造する方法は、限定されず、例えば水に上記のプレミックスグラウト組成物を全量加え混練する方法、水に上記のプレミックスグラウト組成物を混練しながら加え更に混練する方法、上記のプレミックスグラウト組成物に水を全量加え混練する方法、上記のプレミックスグラウト組成物に水を混練しながら加え更に混練する方法、水及び上記のプレミックスグラウト組成物のそれぞれ一部ずつを２以上に分けて混練したものを合わせて更に混練する方法、水と水性の混和材料を合わせたものに上記のプレミックスグラウト組成物を全量加え混練する方法、水と水性の混和材料を合わせたものに上記のプレミックスグラウト組成物を混練しながら加え更に混練する方法、上記のプレミックスグラウト組成物に水と水性の混和材料を合わせたものを全量加え混練する方法、上記のプレミックスグラウト組成物に水と水性の混和材料を合わせたものを混練しながら加え更に混練する方法、水と水性の混和材料を合わせたものに及び上記のプレミックスグラウト組成物のそれぞれ一部ずつを２以上に分けて混練したものを合わせて更に混練する方法等がある。上記のプレミックスグラウト組成物と水以外に混和材料を混和させる場合は、上記のプレミックスグラウト組成物に添加しても、水に添加しても、両方に添加してもよく、上記のグラウト組成物と水を混練したものに添加してもよい。また、混練に用いる器具や混練装置も特に限定されないが、ミキサを用いることが量を多く混練できるので好ましい。用いることのできるミキサとしては連続式ミキサでもバッチ式ミキサでも良く、例えばパン型コンクリートミキサ、パグミル型コンクリートミキサ、重力式コンクリートミキサ、グラウトミキサ、ハンドミキサ、左官ミキサ等が挙げられる。 Further, the method for producing the grout material by adding water to the premix grout composition of the present invention and kneading is not limited, for example, the method of adding the entire amount of the above premix grout composition to water and kneading, and the above to water A method of adding and kneading the premix grout composition while kneading, a method of adding and kneading all the water to the premix grout composition, and a method of adding and kneading water to the premix grout composition while kneading , A method of further kneading a mixture of water and a part of each of the above premix grout compositions divided into two or more, and further kneading, the above premix grout composition to a combination of water and an aqueous admixture The above premix grout composition is added to a mixture of water and an aqueous admixture while kneading and further mixed. A method of mixing, adding and kneading a total amount of water and an aqueous admixture to the premix grout composition, and kneading a mixture of water and an aqueous admixture to the premix grout composition In addition, there are a method of further kneading, a method in which water and an aqueous admixture are combined, and a method in which a part of each of the above premix grout compositions is kneaded into two or more and further kneaded. When admixing ingredients other than the above premix grout composition and water, it may be added to the above premix grout composition, to water, or to both, and the above grout You may add to what knead | mixed the composition and water. Moreover, although the apparatus and kneading apparatus used for kneading are not particularly limited, it is preferable to use a mixer because a large amount can be kneaded. The mixer that can be used may be a continuous mixer or a batch mixer, such as a pan concrete mixer, a pug mill concrete mixer, a gravity concrete mixer, a grout mixer, a hand mixer, and a plaster mixer.
［実施例１］
珪砂（４ｍｍ以下（市販品））を公称目開き０．１５ｍｍ、０．３ｍｍ、２．５ｍｍの篩を用いて篩い分けた４種類の珪砂及び豆砂利（４ｍｍ超７ｍｍ以下）１種類を配合し、表１に示す粒度分布の骨材１４種類（Ｎｏ．１〜Ｎｏ．１６）を作製した。
[Example 1]
4 types of silica sand and bean gravel (over 4 mm and 7 mm or less) mixed with silica sand (4 mm or less (commercially available)) using a sieve with nominal openings of 0.15 mm, 0.3 mm, and 2.5 mm are blended. 14 types of aggregates (No. 1 to No. 16) having the particle size distribution shown in Table 1 were prepared.
上記で作製した骨材、並びに、セメント、膨張材、セメント分散剤、増粘剤及び発泡剤を表２に示す配合割合でパドルミキサに投入後、乾式混合することでプレミックスグラウト組成物を１４種類（本発明品１〜１０、並びに参考品１〜４）作製した。このときの使用材料（骨材を除く。）を以下に示した。
＜使用材料＞
セメント：普通ポルトランドセメント（太平洋セメント社製）
膨張材：ＪＩＳ Ａ ６２０２「コンクリート用膨張材 」に適合する石灰系膨張材（太平洋マテリアル株式会社製）
セメント分散剤：ナフタレンスルホン酸塩系高性能減水剤（市販品、粉末）
増粘剤：水溶性セルロースエーテル系増粘剤（信越化学工業社製、粉末）
発泡剤：アルミニウム粉末（東洋アルミニウウム社製）
14 types of premix grout compositions were prepared by adding the aggregates prepared above and cement, expansion material, cement dispersant, thickener and foaming agent into the paddle mixer in the blending ratio shown in Table 2 and then dry-mixing them. (
<Materials used>
Cement: Ordinary Portland cement (manufactured by Taiheiyo Cement)
Expansion material: Lime-based expansion material (manufactured by Taiheiyo Materials Co., Ltd.) conforming to JIS A 6202 “Expansion material for concrete”
Cement dispersant: Naphthalene sulfonate-based high-performance water reducing agent (commercial product, powder)
Thickener: Water-soluble cellulose ether thickener (Shin-Etsu Chemical Co., Ltd., powder)
Foaming agent: Aluminum powder (Toyo Aluminum Co., Ltd.)
作製したプレミックスグラウト組成物２５ｋｇに、表３に示した割合の水道水を加え、ハンドミキサ（回転数；１０００ｒ．ｐ．ｍ．、羽根直径；１００ｍｍブレード）及び金属性円筒容器（容量５Ｌ）を用いて２０℃環境下で練り混ぜ、混練物（グラウトモルタル）を作製した。作製したグラウトモルタルの品質試験として以下に示す通り、流動性、ブリーディング率及び圧縮強度を測定した。これらの結果を表３に水量とともに示した。尚、圧縮強度試験以外の品質試験は、何れも２０±３℃、湿度８０％以上の恒温室内で行った。
＜品質試験方法＞
・流動性試験
土木学会基準 ＪＳＣＥ−Ｆ ５４１「充てんモルタルの流動性試験方法」に従って、グラウト材（グラウトモルタル）のＪ１４漏斗による流下時間を測定した。
・ブリーディング試験
ブリーディングは、ＪＩＳＡ１１２３「コンクリートのブリーディングの試験方法」に従いブリーディング率を測定し、２時間後におけるブリーディング率を求めた。
・骨材沈降の有無確認試験（材料の不分離性の確認）
ブリーディング試験の２時間後の測定の後、グラウト材内にポリフィルム製の手袋を装着した上で手を入れ、触感により骨材沈下の有無を確認した。容器の底部分に骨材が沈降し溜まっているものを×（不良）、骨材が溜まっていないものを○（良好）と評価した。
・圧縮強度試験
土木学会基準ＪＳＣＥ−Ｇ ５０５「円柱供試体を用いたモルタルまたはセメントペーストの圧縮強度試験方法」に準じ、材齢２８日の圧縮強度を測定した。このとき供試体は、材齢１日で脱型し、その後２０℃の水中で試験直前まで養生した。
Tap water of the ratio shown in Table 3 was added to 25 kg of the prepared premix grout composition, and a hand mixer (rotation speed: 1000 rpm, blade diameter: 100 mm blade) and metallic cylindrical container (capacity 5 L) And kneaded in an environment of 20 ° C. to prepare a kneaded product (grouting mortar). As a quality test of the produced grout mortar, fluidity, bleeding rate and compressive strength were measured as shown below. These results are shown in Table 3 together with the amount of water. In addition, all quality tests other than the compressive strength test were performed in a temperature-controlled room at 20 ± 3 ° C. and a humidity of 80% or more.
<Quality test method>
According · "Test Method of Flowability for Filling Mortar" fluidity test Civil Engineering standard JSCE-F 541, to measure the flow time by J 14 funnel grout (grout mortar).
-Bleeding test The bleeding was measured according to JIS A 1123 "Testing method for bleeding of concrete" to obtain the bleeding rate after 2 hours.
・ Confirmation of presence or absence of aggregate sedimentation (confirmation of material inseparability)
After measuring 2 hours after the bleeding test, a hand was put on a grout material with a polyfilm glove, and the presence of aggregate subsidence was confirmed by touch. The case where aggregates settled and collected at the bottom of the container was evaluated as x (defective), and the case where aggregates were not accumulated was evaluated as good (good).
-Compressive strength test The compressive strength of 28 days of age was measured according to JSCE-G 505 "Method of testing compressive strength of mortar or cement paste using a cylindrical specimen". At this time, the specimen was demolded at the age of 1 day, and then cured in water at 20 ° C. until just before the test.
本発明の実施例に当たるプレミックスグラウト組成物（本発明品１〜１０）を用いたグラウト材（グラウトモルタル）は、何れもＪ１４漏斗による流下時間が６秒〜１０秒の範囲内で高い流動性を示した。また、本発明の実施例に当たるプレミックスグラウト組成物（本発明品１〜１０）を用いたグラウト材は、何れもブリーディング率が０％且つ骨材沈下も見られず、材料分離抵抗性に優れていた。また、これらのグラウト材は、何れも材齢２８日における圧縮強度が６０Ｎ／ｍｍ２以上と高い強度を示した。一方、骨材中４ｍｍ超１０ｍｍ以下の骨材の含有率が６質量％である参考品１のプレミックスグラウト組成物を用いたグラウト材は、Ｊ１４漏斗を用いた流下時間が２２．９秒と流動性に劣り、骨材中４ｍｍ超１０ｍｍ以下の骨材の含有率が５０質量％である参考品２は、顕著なブリーディングが発生し、材料分離が発生した。また、圧縮強度も４２．３ｍｍ２と本発明の実施例に当たるプレミックスグラウト組成物を用いた場合に比べて、低い強度発現性であった。また、試験に用いたプレミックスグラウト組成物（本発明品１〜１０並びに参考品１〜４）を用いたグラウト材は、何れもＪＳＣＥ−Ｆ ５４２−１９９９「充てんモルタルのブリーディング率および膨張率試験方法」を別途行った結果、何れも膨張率がプラスの値、即ち膨張していた。
Premix grout composition impinging on the embodiment the present invention (the invention products 1-10) grout with (grout mortar) are all falling time by J 14 funnel high within the range of 6 to 10 seconds flow Showed sex. In addition, the grout materials using the premix grout compositions corresponding to the examples of the present invention (the products of the
［実施例２］
実施例１で作製したプレミックスグラウト組成物（本発明品４及び８）を用い、実施例１と同様にグラウト材（グラウトモルタル）を作製した。作製したグラウト材の品質評価試験として、以下に示す発熱性試験および長さ変化試験を実施した。これらの結果を表４並びに図１及び図２に示した。また、合わせて、以下に示した市販の無収縮モルタル２種類も同様にグラウト材を作製し、発熱性試験および長さ変化試験を行いその結果を本発明品４及び８を用いた結果と合わせて表４並びに図１及び図２に示した。このときの水量は、市販無収縮モルタル（その１）がＷ／Ｐ１８．０％、市販無収縮モルタル（その２）がＷ／Ｐ１５．０％となる量とした。
＜使用した市販の無収縮モルタル＞
・市販無収縮モルタル（その１）：含まれる結合材の質量（Ｂ）に対する骨材質量（ａ）の含有比率（ａ／Ｂ）が１．０のもの。
・市販無収縮モルタル（その２）：低発熱型無収縮モルタル。ａ／Ｂ＞１．０のもの。
＜品質試験方法＞
・発熱性試験
部材厚が大きい充填箇所を想定し、内径３００ｍｍとした立方木製型枠の中心部位に熱伝対を設置し、製造したグラウトモルタルを擦りきり上面まで充填し、蓋をし、密封してデータロガーにより中心温度の経時変化を測定した。
充填したグラウトモルタルの中心部位の温度Ｔを充填直後から連続的に測定し、充填直後のグラウトモルタルの中心部の温度（Ｔ０）と、グラウトモルタルの中心部の経時温度（Ｔ１）から、下記式（１）により、温度上昇量（ｄＴ）を求めた。
ｄＴ＝Ｔ１−Ｔ０ ・・・・・・ （１）
・長さ変化試験
ＪＩＳＡ１１２９「モルタル及びコンクリートの長さ変化試験方法」に準拠し、試験体の寸法は１００×１００×４００mmとし、乾燥期間６ヶ月までの長さ変化を測定した。
[Example 2]
A grout material (grouting mortar) was prepared in the same manner as in Example 1 using the premixed grout composition prepared in Example 1 (
<Commercial non-shrink mortar used>
Commercially available non-shrink mortar (No. 1): The content ratio (a / B) of the aggregate mass (a) to the mass (B) of the contained binder is 1.0.
Commercially available non-shrink mortar (part 2): a low exothermic type non-shrink mortar. a / B> 1.0.
<Quality test method>
・ Exothermic test Assuming a filling part with a large part thickness, a thermocouple is installed at the center part of a cubic wooden formwork with an inner diameter of 300 mm, the grout mortar produced is rubbed and filled up to the top, covered, and sealed. Then, the change with time in the center temperature was measured by a data logger.
The temperature T of the central part of the filled grout mortar is continuously measured immediately after filling, and the following formula is obtained from the temperature (T0) of the central part of the grout mortar immediately after filling and the time-dependent temperature (T1) of the central part of the grout mortar. The temperature rise amount (dT) was obtained from (1).
dT = T1-T0 (1)
-Length change test Based on JISA1129 "Mortar and concrete length change test method", the dimension of the test body was 100x100x400 mm, and the length change until a drying period of 6 months was measured.
本発明の実施例に当たる本発明品４及び８のプレミックスグラウト組成物より作製したグラウト材（グラウトモルタル）は、何れも温度上昇量の最大値が４０℃未満で、低発熱性が確認された。また、市販の無収縮モルタル（その１）の温度上昇量は８０℃近くまで到達し、低発熱型の市販の無収縮モルタル（その２）も温度上昇量の最大値が５０℃以上に達し低発熱性が不充分であった。
As for the grout material (grout mortar) produced from the premix grout compositions of the
また、本発明の実施例に当たる本発明品４及び８のプレミックスグラウト組成物より作製したグラウト材（グラウトモルタル）は、何れも乾燥期間６ヶ月において、収縮率が８００μ未満（長さ変化率が−８００μ（×１０−６）より大きい値）と、低収縮性が確認された。一方、市販の無収縮モルタル（その１）の収縮率は約１２００μ（長さ変化率は約−１２００μ）、低発熱型である市販の無収縮モルタル（その２）の収縮率が約１０００μ（長さ変化率は約−１０００μ）と、何れも乾燥期間６ヶ月において８００μ以上の大きな収縮が認められた。
In addition, the grout materials (grouting mortars) prepared from the premixed grout compositions of the
本発明のプレミックスグラウト組成物は、土木構造物や建築構造物の構築又は補修、或いは機械の設置等に用いることができる。また、コンクリートミキサー車が入ることができない狭小部や小規模なコンクリート打設箇所に、コンクリートの替わりとして、低発熱で且つ低収縮性を求められる箇所の充填に用いることができる。また、発泡剤を０．０００２〜０．０３質量％含有させた本発明のプレミックスグラウト組成物は、何れも無収縮性を示したので、無収縮モルタルとして用いることができる。 The premix grout composition of the present invention can be used for construction or repair of civil engineering structures and building structures, installation of machines, and the like. Moreover, it can be used for filling a place where low heat generation and low shrinkage are required, instead of concrete, in a narrow portion or a small-scale concrete placement place where a concrete mixer truck cannot enter. Moreover, since the premix grout composition of the present invention containing 0.0002 to 0.03% by mass of the foaming agent exhibited no-shrinkage, it can be used as a non-shrink mortar.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013273635A JP6296600B2 (en) | 2013-12-28 | 2013-12-28 | Premix grout composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013273635A JP6296600B2 (en) | 2013-12-28 | 2013-12-28 | Premix grout composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015127285A true JP2015127285A (en) | 2015-07-09 |
| JP6296600B2 JP6296600B2 (en) | 2018-03-20 |
Family
ID=53837478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013273635A Active JP6296600B2 (en) | 2013-12-28 | 2013-12-28 | Premix grout composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6296600B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101671438B1 (en) * | 2015-12-07 | 2016-11-02 | 주식회사 삼표산업 | Non-shrink grout mortar composition for filling joint of precast concrete members |
| JP7437203B2 (en) | 2020-03-25 | 2024-02-22 | 太平洋マテリアル株式会社 | mortar concrete |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109516747B (en) * | 2018-12-27 | 2021-02-05 | 淮阴师范学院 | Concrete repairing material and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1017342A (en) * | 1996-07-01 | 1998-01-20 | Takenaka Komuten Co Ltd | Non-shrink mortar for repairing and reinforcing concrete structure |
| JPH1095652A (en) * | 1996-09-17 | 1998-04-14 | Nippon Cement Co Ltd | Grouting composition |
| JPH10194815A (en) * | 1997-01-08 | 1998-07-28 | Denki Kagaku Kogyo Kk | Spraying material and spraying construction using the same |
| JPH11130505A (en) * | 1997-10-31 | 1999-05-18 | Railway Technical Res Inst | Grout composition for railway track |
| JP2000034156A (en) * | 1998-07-21 | 2000-02-02 | Taiheiyo Cement Corp | Cement-based grout composition |
| JP2008189526A (en) * | 2007-02-06 | 2008-08-21 | Basf Pozzolith Ltd | Admixture for grout and cement composition for grout |
| JP2011195403A (en) * | 2010-03-23 | 2011-10-06 | Ube Industries Ltd | Hydraulic composition, grout mortar, and hardened body of the same |
| JP2013063900A (en) * | 2011-09-02 | 2013-04-11 | Kowa Engineering:Kk | Concrete composition and hardened concrete |
| JP2013249214A (en) * | 2012-05-30 | 2013-12-12 | Mitsubishi Materials Corp | Underwater anti-washout non-shrink grout |
-
2013
- 2013-12-28 JP JP2013273635A patent/JP6296600B2/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1017342A (en) * | 1996-07-01 | 1998-01-20 | Takenaka Komuten Co Ltd | Non-shrink mortar for repairing and reinforcing concrete structure |
| JPH1095652A (en) * | 1996-09-17 | 1998-04-14 | Nippon Cement Co Ltd | Grouting composition |
| JPH10194815A (en) * | 1997-01-08 | 1998-07-28 | Denki Kagaku Kogyo Kk | Spraying material and spraying construction using the same |
| JPH11130505A (en) * | 1997-10-31 | 1999-05-18 | Railway Technical Res Inst | Grout composition for railway track |
| JP2000034156A (en) * | 1998-07-21 | 2000-02-02 | Taiheiyo Cement Corp | Cement-based grout composition |
| JP2008189526A (en) * | 2007-02-06 | 2008-08-21 | Basf Pozzolith Ltd | Admixture for grout and cement composition for grout |
| JP2011195403A (en) * | 2010-03-23 | 2011-10-06 | Ube Industries Ltd | Hydraulic composition, grout mortar, and hardened body of the same |
| JP2013063900A (en) * | 2011-09-02 | 2013-04-11 | Kowa Engineering:Kk | Concrete composition and hardened concrete |
| JP2013249214A (en) * | 2012-05-30 | 2013-12-12 | Mitsubishi Materials Corp | Underwater anti-washout non-shrink grout |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101671438B1 (en) * | 2015-12-07 | 2016-11-02 | 주식회사 삼표산업 | Non-shrink grout mortar composition for filling joint of precast concrete members |
| JP7437203B2 (en) | 2020-03-25 | 2024-02-22 | 太平洋マテリアル株式会社 | mortar concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6296600B2 (en) | 2018-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kebaïli et al. | Adverse effect of the mass substitution of natural aggregates by air-dried recycled concrete aggregates on the self-compacting ability of concrete: evidence and analysis through an example | |
| JP6223820B2 (en) | Polymer cement grout mortar | |
| JP6404629B2 (en) | High fluidity retention type underwater non-separable grout composition | |
| JP2009155184A (en) | High fluidity ultrahigh early-strength admixture and high fluidity ultrahigh early-strength concrete | |
| JP6086585B2 (en) | Grout composition and grout material | |
| JP6271249B2 (en) | Spraying mortar | |
| JP2015127282A (en) | Mortar for plastering | |
| JP6891041B2 (en) | Fast-strength ultra-high-strength grout composition | |
| JP6296600B2 (en) | Premix grout composition | |
| JP6674301B2 (en) | Cement-based low-viscosity fast-hardening grout material | |
| JP6133597B2 (en) | Quick-setting mortar composition | |
| JP2011136863A (en) | Superhigh strength grout composition | |
| JP2011132040A (en) | Thickener for anti-washout underwater hydraulic composition | |
| JP5534932B2 (en) | Premix mortar composition and premix non-shrink mortar composition | |
| JP4718969B2 (en) | Foaming agent, non-shrink grout composition, and non-shrink grout material using the same | |
| JP7136972B2 (en) | Wet spraying method | |
| JP2010155758A (en) | Cement admixture and cement composition | |
| JP6645820B2 (en) | Inseparable mortar composition in water | |
| JP6482861B2 (en) | Inseparable mortar composition in water | |
| JP6306973B2 (en) | High fluidity retention type low exothermic grout composition | |
| JP7350425B2 (en) | Highly durable grout composition | |
| JP2010155757A (en) | Admixture for grout and grout composition | |
| JP6955938B2 (en) | High fluid concrete | |
| JP7103893B2 (en) | Insoluble mortar composition in water and its mortar | |
| JP2010100457A (en) | Grout composition for use at elevated temperature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20161027 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20170802 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20170818 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20171005 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20180215 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20180216 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6296600 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |