JPH02248351A - Concrete setting hardening accelerator - Google Patents
Concrete setting hardening acceleratorInfo
- Publication number
- JPH02248351A JPH02248351A JP6825989A JP6825989A JPH02248351A JP H02248351 A JPH02248351 A JP H02248351A JP 6825989 A JP6825989 A JP 6825989A JP 6825989 A JP6825989 A JP 6825989A JP H02248351 A JPH02248351 A JP H02248351A
- Authority
- JP
- Japan
- Prior art keywords
- agent
- concrete
- acid
- setting
- hardening accelerator
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- 239000004568 cement Substances 0.000 claims abstract description 15
- 150000007524 organic acids Chemical class 0.000 claims abstract description 13
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 10
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 5
- 239000001509 sodium citrate Substances 0.000 claims abstract description 4
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 4
- 239000003513 alkali Substances 0.000 claims abstract description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims abstract description 3
- 239000001508 potassium citrate Substances 0.000 claims abstract 2
- 229960002635 potassium citrate Drugs 0.000 claims abstract 2
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 claims abstract 2
- 235000011082 potassium citrates Nutrition 0.000 claims abstract 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 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 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 235000015165 citric acid Nutrition 0.000 claims description 3
- 159000000000 sodium salts Chemical class 0.000 claims description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims description 2
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 2
- PHOQVHQSTUBQQK-SQOUGZDYSA-N D-glucono-1,5-lactone Chemical compound OC[C@H]1OC(=O)[C@H](O)[C@@H](O)[C@@H]1O PHOQVHQSTUBQQK-SQOUGZDYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 239000001263 FEMA 3042 Substances 0.000 claims description 2
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 2
- 235000004515 gallic acid Nutrition 0.000 claims description 2
- 229940074391 gallic acid Drugs 0.000 claims description 2
- 239000000174 gluconic acid Substances 0.000 claims description 2
- 235000012208 gluconic acid Nutrition 0.000 claims description 2
- 235000012209 glucono delta-lactone Nutrition 0.000 claims description 2
- 239000000182 glucono-delta-lactone Substances 0.000 claims description 2
- 229960003681 gluconolactone Drugs 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- 229940099690 malic acid Drugs 0.000 claims description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 2
- 235000015523 tannic acid Nutrition 0.000 claims description 2
- 229940033123 tannic acid Drugs 0.000 claims description 2
- 229920002258 tannic acid Polymers 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 2
- -1 aluminate salt Chemical class 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 claims 2
- 229960003975 potassium Drugs 0.000 claims 2
- 229910052700 potassium Chemical group 0.000 claims 2
- 239000011591 potassium Chemical group 0.000 claims 2
- LRBQNJMCXXYXIU-QWKBTXIPSA-N gallotannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@H]2[C@@H]([C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-QWKBTXIPSA-N 0.000 claims 1
- 150000004645 aluminates Chemical class 0.000 abstract description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 12
- 238000009415 formwork Methods 0.000 description 8
- 238000005345 coagulation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003999 initiator Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000005341 metaphosphate group Chemical group 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- GIXFALHDORQSOQ-UHFFFAOYSA-J 2,4,6,8-tetraoxido-1,3,5,7,2$l^{5},4$l^{5},6$l^{5},8$l^{5}-tetraoxatetraphosphocane 2,4,6,8-tetraoxide Chemical compound [O-]P1(=O)OP([O-])(=O)OP([O-])(=O)OP([O-])(=O)O1 GIXFALHDORQSOQ-UHFFFAOYSA-J 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 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
- 238000005422 blasting Methods 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- AZSFNUJOCKMOGB-UHFFFAOYSA-K cyclotriphosphate(3-) Chemical compound [O-]P1(=O)OP([O-])(=O)OP([O-])(=O)O1 AZSFNUJOCKMOGB-UHFFFAOYSA-K 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/06—Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
- C04B40/0658—Retarder inhibited mortars activated by the addition of accelerators or retarder-neutralising agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はコンクリート又はモルタルを型枠等に吹き込ん
だり流し込んだりしたのちに急速に凝結及び硬化させる
混和剤に関するものである。土木建築等で施工能率を上
げるために用いられる。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an admixture that rapidly sets and hardens concrete or mortar after it is blown or poured into a mold or the like. Used to increase construction efficiency in civil engineering and construction.
［発明の背景］
現在山岳トンネル建設における中心的工法は地山に直接
コンクリートを吹き付ける方法を採用している。この方
法は粉塵の発生が多くまたはね返りによるロスも多い、
またはね返ったコンクリートは除く手間がかかる。これ
に対して型枠を用いてコンクリートを吹き込む或は流し
込む方法は２次覆工まで一度に行うことができ、また粉
塵やはね返りの問題は解決する。しかし型枠を用いた工
法では脱型するまでの時間が経済的に大きな意味をもっ
てくる。理想的には従来の吹付はコンクリート工法以上
まで施工速度を上げる必要があるが、この目的のために
は従来の吹付はコンクリート用急結剤では凝結が速すぎ
十分型枠内に行き渡るまでに固まってしまう、また急結
剤の使用量を減らしたり、従来のいわゆる硬化促進剤的
なものでは強度発現が遅く発破のサイクルにおいつかな
い。[Background of the Invention] Currently, the main construction method in mountain tunnel construction is to spray concrete directly onto the ground. This method generates a lot of dust and has a lot of loss due to rebound.
Also, it is time-consuming to remove concrete that has rebounded. On the other hand, the method of pouring or pouring concrete using formwork can perform up to the secondary lining all at once, and also solves the problem of dust and splashing. However, in construction methods that use formwork, the time it takes to demolish the mold is of great economic significance. Ideally, it is necessary to increase the construction speed of conventional spraying to a level higher than that of concrete construction methods, but for this purpose, conventional spraying sets too quickly for concrete quick-setting agents, and does not harden enough to reach the inside of the formwork. In addition, reducing the amount of quick-setting agents used, and using conventional so-called hardening accelerators, the strength development is slow and the blasting cycle cannot be completed.
そこでこの型枠を用いた工法では数十秒から数分程度の
流動性を保つ時間を有しその後急速に凝結・硬化する性
質を有するコンクリートが求められていた。Therefore, in this method of construction using formwork, there is a need for concrete that maintains its fluidity for a period of several tens of seconds to several minutes, and then rapidly sets and hardens.
［従来の技術］
型枠工法用には、従来吹付はコンクリートに用いられて
いた急結剤等をそれまでの標準的な添加量と異なる添加
量で用い凝結を遅らして使用していたが流動性、凝結速
度等で十分な満足が得られていない。[Conventional technology] For formwork construction methods, conventional spraying used the quick setting agent used in concrete in a different amount from the standard addition amount to delay setting. Sufficient satisfaction was not obtained in terms of fluidity, coagulation rate, etc.
［発明が解決しようとする問題点］
コンクリート又はモルタルが流動性を有する時間を数１
０秒から数分まで任意に設定できない。また適正使用量
から外れている場合−旦凝結が始まっても速やかに実用
強度に達せず、長間強度も十分ではない、 現在主流で
ある粉末タイプの添加剤の場合添加量の制御精度が悪く
吹き込みまたは流し込みながらの混合は均一になりにく
く難しい。[Problem to be solved by the invention] How long does concrete or mortar have fluidity?
It cannot be set arbitrarily from 0 seconds to several minutes. Also, if the amount used is outside the appropriate amount - once setting begins, practical strength is not quickly reached, and long-term strength is not sufficient.In the case of powder type additives, which are currently the mainstream, the control accuracy of the amount added is poor. Mixing while blowing or pouring is difficult because it is difficult to achieve uniformity.
また粉末タイプは搬送用エアーの乾燥装置を設置しなけ
れば閉塞しやすいなと設備面でも負担が多い。In addition, the powder type requires a heavy burden on equipment, as it can easily become clogged unless a drying device is installed for conveying air.
［問題点を解決するための手段］
本発明の添加剤は二剤に分かれており、予め調合時にコ
ンクリートに混入しておく粉末タイプのもの（Ａ剤）と
打設する直前に添加する液体のタイプのもの（Ｂ剤）が
必要である。実際の注型作業時にはＢ剤のみ意識すれば
よいので液状であるための利点が得られる。 ここでＡ
剤の添加方法であるが、コンクリート材料に・水を添加
する前又は同時に添加するのが望ましく、混水後練り置
いてから添加すると効果が損なわれる場合がある。[Means for solving the problem] The additive of the present invention is divided into two parts: a powder type (agent A) that is mixed into concrete at the time of mixing, and a liquid type that is added immediately before pouring. A type (Agent B) is required. During actual casting work, you only need to be aware of agent B, which has the advantage of being liquid. Here A
Regarding the method of adding the agent, it is preferable to add it to the concrete material before or at the same time as adding water; if it is added after mixing with water, the effect may be impaired.
Ａ剤は急速な凝結に必要な炭酸アルカリ塩と消石灰、そ
して開始剤であるＢ剤が添加されるまでその反応を抑制
するために安定剤として用いられる縮合リン酸塩とクエ
ン酸塩からなる。 クエン酸塩以外にもＢ剤に用いら
れる酒石酸、グルコン酸、グルコノデルタラクトン、グ
ルタル酸、リンゴ酸、没食子酸、タンニン酸のような有
機カルボン酸またはそれらの塩を用いることも可能であ
る。 Ｂ剤は打設する直前に添加され、先にコンクリ
ートに添加されているＡ剤と協同で作用し、今まで停止
していたようにみえた水和反応が急速に開始する作用を
持つ、 このときＢ剤に含まれている有機酸系遅延剤
によって立ち上がりまでの時間を制御することができ、
目的の数１０秒から数分間流動性を維持することが可能
となる。 また有’ａ酸の種類や使用量によって凝結
時間を調整することが可能である。 それぞれの成分
はいま述べた効果・作用を持ってはいるが成分と効果の
関係を単純に結び付けて考えるだけでは十分ではなく多
くの因子が複雑に関わりあって作用している。Part A consists of alkali carbonates and slaked lime, which are necessary for rapid setting, and condensed phosphates and citrates, which are used as stabilizers to suppress the reaction until the initiator, Part B, is added. In addition to citrate, it is also possible to use organic carboxylic acids such as tartaric acid, gluconic acid, glucono delta-lactone, glutaric acid, malic acid, gallic acid, and tannic acid, which are used in agent B, or salts thereof. Agent B is added just before pouring, and works in conjunction with Agent A, which has been added to the concrete earlier, to rapidly start the hydration reaction, which previously seemed to have stopped. The time to rise can be controlled by the organic acid retardant contained in agent B.
It becomes possible to maintain the desired fluidity for several tens of seconds to several minutes. Furthermore, it is possible to adjust the coagulation time depending on the type and amount of the a-acid used. Although each ingredient has the effects and actions just mentioned, it is not enough to simply consider the relationship between ingredients and effects; many factors interact and act in a complex manner.
［発明の効果］本発明によって、コンクリートは、任意
の設定した時間で適切な流動性を保持し、しかる後に急
速に凝結硬化することが可能となるので、型枠の隅々ま
で充填され、しかも脱型を速く行うことが出来るように
なる。 また工法によって流し込み方法或は吹き込み
方法が異なるが、凝結時間が調整可能なので工法に合わ
せた対応が可能となる。 ざらに二剤に分けることに
より、同じ急結効果をあげるにあたり凝結硬化促進剤の
使用量が少なくてすみ合理的である、そして開始剤であ
るＢ剤は液状のものが使用できるので添加は容易となる
。 本発明のＡ剤に用いられる縮合リン酸塩は一般式ｘ
Ｍ２Ｏ・５’Ｐ２Ｏ６で表されるものの内ｘ／ｙ＝１〜
３のものでありメタリン酸塩、ポリリン酸塩、オルトリ
ン酸塩と呼ばれるものである。 メタリン酸塩とは一
般に（ＭＰＯ３）。で表されｎ＝３．４．５．６はそれ
ぞれトリメタリン酸塩、テトラメタリン酸塩、ペンタメ
タリン酸塩、ｌ＼キサメタリン酸塩である。 ポリリン
酸塩は一般にＭ ｎ ＋ ２ Ｐ ００３（＋ ＋ １
で表されｎ＝２．３，４．５はそれぞれビロリン酸塩、
トリポリリン酸塩、テトラポリリン酸塩、ペンタポリリ
ン酸塩である。使用量は対セメン）０．０５重量％未満
では立ち上がり特性が不十分でスランプロスも大きく存
在効果がほとんど認められずまた０、５重量％を超えた
場合も凝結時の立ち上がり特性が大きく低下し望ましく
ない、また０＜Ｘ／ｙ＜１であるウルトラリン酸塩も取
り扱い上の問題はあるが同じ目的で使用できる。 本発
明に用いられるクエン酸塩はナトリウム塩かカリウム塩
でありいずれも対セメント０．０１重量％未満では存在
効果が認められずスランプロスが大きくなる、Ｏ，１ｆ
ｆｉｆｆｉ％を超える場合には長期強度の低下を起こす
ので望ましくない、またクエン酸も同様である。本発明
で用いられる消石灰は対セメン）０．１重量％未満では
凝結時の立ち上がりが不十分で５．０重ｆｉｔ％を超え
ると凝結開始時間の制御が困難となる。[Effect of the invention] According to the present invention, concrete can maintain appropriate fluidity for an arbitrary set time and then rapidly set and harden, so that the concrete can be filled to every corner of the formwork. It becomes possible to perform demolding quickly. In addition, although the pouring method or blowing method differs depending on the construction method, the setting time can be adjusted, so it is possible to adapt it to the construction method. By roughly dividing into two parts, it is rational to use less setting and hardening accelerator to achieve the same rapid setting effect, and addition is easy because part B, which is an initiator, can be used in liquid form. becomes. The condensed phosphate used in agent A of the present invention has the general formula x
Of those represented by M2O・5'P2O6, x/y=1~
3, and are called metaphosphates, polyphosphates, and orthophosphates. Metaphosphate is generally (MPO3). where n=3.4.5.6 are trimetaphosphate, tetrametaphosphate, pentametaphosphate, and l\xametaphosphate, respectively. Polyphosphates are generally M n + 2 P 003 (+ + 1
where n=2.3 and 4.5 are birophosphate and
These are tripolyphosphate, tetrapolyphosphate, and pentapolyphosphate. If the amount used is less than 0.05% by weight of cement, the rising properties will be insufficient, the slump loss will be large, and the effect of its presence will hardly be recognized, and if it exceeds 0.5% by weight, the rising properties during setting will be greatly reduced. Ultraphosphates, which are undesirable and where 0<X/y<1, can also be used for the same purpose, although there are handling problems. The citrate used in the present invention is either a sodium salt or a potassium salt, and if it is less than 0.01% by weight based on the cement, no effect will be observed and the slump loss will increase.
If it exceeds fiffi%, it is undesirable because it causes a decrease in long-term strength, and the same is true for citric acid. If the slaked lime used in the present invention is less than 0.1% by weight (based on cement), the rise during setting will be insufficient, and if it exceeds 5.0% by weight, it will be difficult to control the setting start time.
また生石灰でも化学ｆｌ論的に同様の効果を持つ。Also, quicklime has a similar effect chemically.
本発明で用いられる炭酸ナトリウム又は炭酸カリウムは
対セメント０．２重量％未満では凝結速度、初期強度共
に実用の範囲外であり５．０重量％を超えるとスランプ
ロスが大きく開始剤である８剤を添加するまでの間長時
間安定な流動コンクリートを得ることができない。 本
発明で用いられるアルミン酸ナトリウム又はアルミン酸
カリウムは対セメント０．５重量％未満では開始剤の作
用をせず、１０重員％以上では顕著な強度低下がましく
ない、 アルミン酸塩のモル比（ｘ／ｙ：ｘ Ｍ２Ｏ−
ｙ Ａ ｌ ２Ｏ３）は１．０より小さい場合は高濃度
の安定な溶液状態のアルミン１１２塩が維持できず、ア
ルミニウムの含水酸化物を生成しやすい。If the sodium carbonate or potassium carbonate used in the present invention is less than 0.2% by weight of the cement, both the setting rate and the initial strength are out of the practical range, and if it exceeds 5.0% by weight, the slump loss is large and it is an initiator. It is not possible to obtain stable fluidized concrete for a long period of time until the addition of . Sodium aluminate or potassium aluminate used in the present invention does not act as an initiator when it is less than 0.5% by weight based on the cement, and there is no significant decrease in strength when it is 10% by weight or more. Ratio (x/y:x M2O-
y A l 2 O3) is less than 1.0, it is not possible to maintain a highly concentrated stable solution of aluminum 112 salt, and a hydrous oxide of aluminum is likely to be produced.
同じくモル比２．５以上でもアルミニウムの含有員を下
げなければ安定な溶液状態を保つことができない、アル
ミン酸塩の濃度は、水の持込みをできるだけ少なくする
という意味でできるだけ高くするのが望ましいが５０重
量％強が限界である。Similarly, even if the molar ratio is 2.5 or more, a stable solution state cannot be maintained unless the aluminum content is lowered.It is desirable to keep the aluminate concentration as high as possible in order to minimize the amount of water brought in. The upper limit is a little over 50% by weight.
本発明でＢ剤に用いられる有機酸系遅延剤は対セメント
０．００１重量％未満では遅延効果は殆ど認められず１
．０重量％を超えると強度発現に悪影響がある。The organic acid retardant used in the B agent in the present invention has almost no retardation effect when it is less than 0.001% by weight based on the cement.
．． If it exceeds 0% by weight, it will have an adverse effect on strength development.
［実施例コ
Ｂ剤の配合を一定にし、Ａ剤各成分を変化した配合の例
を表−１に示す、 試料Ｎｏ、２の配合についてテトラ
ポリリン酸を他の縮合リン酸に置き換えた場合の配合例
を表−２に示す、 Ｂ剤中のアルミン酸塩についてナ
トリウム塩を用いた場合や異なるモル比（Ｋ２Ｏ／Ａ１
２Ｏ３）のアルミン酸カリウムと各種有機酸系遅延剤を
組合せた例を表−３に示す、 また比較例として一般
的な市販急結剤Ａ（セメント鉱物系）を用いた場合を表
−４に示す。 表−５は試験Ｎｏ、１〜Ｎｏ、５まで
の凝結硬化特性と１日及び７日の一軸圧縮強度である。[Example Co Table 1 shows examples of formulations in which the formulation of agent B was kept constant and each component of agent A was changed. Examples of formulations are shown in Table 2, where sodium salt is used for the aluminate in agent B and different molar ratios (K2O/A1
Examples of combinations of potassium aluminate (2O3) and various organic acid retardants are shown in Table 3, and Table 4 shows a comparative example of using a general commercially available quick setting agent A (cement mineral type). show. Table 5 shows the setting and hardening properties of test Nos. 1 to 5, and the unconfined compressive strength on 1 day and 7 days.
表−６は試料Ｎｏ、６〜Ｎｏ、１３及び比較例１〜比
較例３の凝結硬化特性を示す。Table 6 shows the setting and hardening properties of Samples No. 6 to No. 13 and Comparative Examples 1 to 3.
該実施例はモルタルにより行い、配合はセメント５００
ｇ、ｆｉ骨材（ＦＭ２．８）１９００ｇ、水３００ｇで
ある。 ？Ｉ１１定はブロクター貫入試験に依り、表
中では凝結開始時間と凝結速度で表した。This example was carried out using mortar, and the mixture was cement 500.
g, fi aggregate (FM2.8) 1900g, and water 300g. ? The I11 constant was determined by the Broctor penetration test, and is expressed in the table by the setting start time and setting rate.
凝結速度はブロクター貫入値が得られ始めてから約５分
径度までの値を一次関数で近似し、その勾配を求めたも
ので、Ｕ結開始時間はその一次関数と貫入値Ｏ（横軸）
との交点が表す時間である。The condensation rate is obtained by approximating the value from the time the Broctor penetration value begins to approximately 5 minutes diameter to a linear function, and the gradient thereof is determined, and the U-coagulation start time is determined by the linear function and the penetration value O (horizontal axis).
This is the time represented by the intersection with .
第１図〜第４図はＡ剤の各成分に関して直交表を用いて
求めた凝結開始時間、凝結速度、１日強度、７日強度に
対する効果を表しており表−１の作用効果をあられして
いる。 比較例１（４％使用）ではほぼ急結しており流
動性を維持する時間は殆ど存在していない、比較例２（
３％使用）では凝結開始時間はそれほど短くならず凝結
速度の方だけが大きく影響を受は小さな値になっている
のが分かる。 比較例３（２％使用）では殆ど凝結して
いない、 これに比べ本発明では凝結開始時間が長く
ても凝結速度は低下せず流動性をしばらく保持した後急
速に凝結するという本発明の目的が達成されていること
が分かる。 また第５図は各種有機酸系遅延剤をＢ剤
に用いることによって凝結時間を変えることが出来るこ
とを示している。 同一有機酸系遅延剤であっても添加
量によって凝結開始時間のＭ！！！！が可能である事が
分かる。Figures 1 to 4 show the effects of each component of Agent A on setting start time, setting rate, 1-day strength, and 7-day strength, which were determined using an orthogonal array. ing. In Comparative Example 1 (using 4%), the solidification occurred almost rapidly and there was almost no time to maintain fluidity; Comparative Example 2 (using 4%)
3%), the setting start time is not so short, and only the setting rate is greatly affected, and the value is small. Comparative Example 3 (used at 2%) showed almost no coagulation. In contrast, in the present invention, even if the coagulation start time was long, the coagulation rate did not decrease, and the object of the present invention was to maintain fluidity for a while and then rapidly coagulate. It can be seen that this has been achieved. Furthermore, FIG. 5 shows that the setting time can be changed by using various organic acid retarders in the B agent. Even if the same organic acid retardant is used, the setting start time M! depends on the amount added! ! ! ! It turns out that is possible.
［作用コ
本発明のコンクリート凝結硬化促進剤は、予め温水時に
材料に混入しておくＡ剤と、打設直前に投入する溶液状
のＢ剤に分かれており、Ｂ剤中に存在する有機酸系遅延
剤により、凝結速度を低下させずに凝結開始までの時間
を調節することができる。 本発明は型枠を用いた工法
に於て最もふされしい凝結特性を有している。 即ち、
注型時までは良好な流動性を有し型枠の隅々まで行き渡
り、注型後は速やかに凝結硬化する。[Function] The concrete setting hardening accelerator of the present invention is divided into agent A, which is mixed into the material in advance with hot water, and agent B, which is a solution that is added immediately before pouring. By using a system retardant, it is possible to adjust the time until setting starts without reducing the setting rate. The present invention has setting characteristics that are most suitable for construction methods using formwork. That is,
It has good fluidity until it is cast, spreads to every corner of the mold, and quickly solidifies and hardens after casting.
また施工時に添加するＢ剤は液状となっており閉塞等の
トラブルが起こらず円滑に作業ができる。In addition, the B agent added during construction is in liquid form, allowing for smooth work without causing problems such as blockages.
本発明により型枠を用いた急速施工工法が一層進展する
ものと思われる。It is believed that the present invention will further advance rapid construction methods using formwork.
第１図〜第４図はそれぞれＡ剤中の各成分が凝結開始時
間、凝結速度、１日強度、７日強度に及ぼす影響を示し
たものである。 直交表を用いたため変動成分以外の成
分は平均化されている。ｍＩｒＢは綜合リン酸塩にテト
ラポリリン酸ナトリウムを用いた場合の縮合リンｗ１塩
の作用である。
ｊＩＺ図はクエン酸ナトリウムの作用である。 第３
図は消石灰の作用である。 第４図は炭酸ナトリウムの
作用である。 第５図はＢ剤中の各種有機酸系遅延剤の
添加量と凝結特性の関係を示したものである。
第１図
第２［ｉ！１
テトラポリリン酸ナトリウム（対セメントｌｉ量％）ク
エン酸ナトリウム（対セメントｆｆ１ｆｆｉ％）第３図
Ｏ
！４図
０．５ １．Ｑ
炭酸ナトリウム（対セメントｔｍ％）
１．５
２．０Figures 1 to 4 respectively show the influence of each component in Agent A on the setting start time, setting rate, 1-day strength, and 7-day strength. Since an orthogonal array was used, components other than the fluctuating components were averaged. mIrB is the effect of condensed phosphorus w1 salt when sodium tetrapolyphosphate is used as the combined phosphate. The jIZ diagram is the action of sodium citrate. Third
The figure shows the action of slaked lime. Figure 4 shows the action of sodium carbonate. FIG. 5 shows the relationship between the amount of various organic acid retardants added in Agent B and the setting characteristics. Figure 1 2 [i! 1 Sodium tetrapolyphosphate (% of cement li) Sodium citrate (ff1ffi% of cement) Figure 3 O! 4 Figure 0.5 1. Q Sodium carbonate (to cement tm%) 1.5 2.0
Claims (6)
とコンクリートを打設する直前に添加するＢ剤からなり
、Ｂ剤には凝結開始時間を任意に調整することのできる
有機酸系遅延剤を含有することを特徴とするコンクリー
ト凝結硬化促進剤。(1) Consists of agent A, which is mixed in beforehand when mixing concrete, and agent B, which is added just before concrete is poured. Agent B contains an organic acid retardant that can arbitrarily adjust the setting start time. A concrete setting hardening accelerator characterized by containing.
．５重量％、クエン酸、クエン酸ナトリウムまたはクエ
ン酸カリウム０．０１〜０．１重量％、消石灰０．１〜
５．０重量％、炭酸ナトリウムまたは炭酸カリウム０．
２〜５．０重量％よりなるものであることを特徴とする
特許請求の範囲第（１）項記載のコンクリート凝結硬化
促進剤(2) Agent A contains 0.05 to 0 condensed phosphate to cement.
．． 5% by weight, citric acid, sodium citrate or potassium citrate 0.01-0.1% by weight, slaked lime 0.1-0.
5.0% by weight, 0.0% sodium carbonate or potassium carbonate.
The concrete setting hardening accelerator according to claim (1), characterized in that it contains 2 to 5.0% by weight.
５〜１０重量％及び有機酸系遅延剤０．００１〜１．０
重量％からなる特許請求の範囲第（１）項及び第（２）
項記載のコンクリート凝結硬化促進剤。(3) Agent B has 0.0% alkali aluminate salt for cement.
5-10% by weight and organic acid retardant 0.001-1.0
Claims (1) and (2) consisting of weight %
Concrete setting hardening accelerator as described in section.
Ｍ＿２Ｏ・ｙＰ＿２Ｏ＿５で表される化合物でありＭが
ナトリウムまたはカリウムである特許請求範囲第（１）
項〜第（３）項記載のコンクリート凝結硬化促進剤。(4) Condensed phosphate is x where x/y=1 to 3
Claim No. (1), which is a compound represented by M_2O・yP_2O_5, where M is sodium or potassium.
Concrete setting and hardening accelerator according to items 1 to 3.
であるところのｘＭ＿２Ｏ・ｙＡｌ＿２Ｏ＿３で表され
る化合物でありＭがナトリウムまたはカリウムである特
許請求範囲第（１）項〜第（４）項記載のコンクリート
凝結硬化促進剤。(5) Alkaline aluminate salt x/y=1.0-2.5
The concrete setting hardening accelerator according to claims (1) to (4), which is a compound represented by xM_2O·yAl_2O_3, where M is sodium or potassium.
、グルタル酸、グルコノデルタラクトン、リンゴ酸、没
食子酸、タンニン酸及び当該有機酸のナトリウム塩又は
カリウム塩のうち少なくとも１種からなる特許請求の範
囲第（１）項〜第（５）項記載のコンクリート凝結硬化
促進剤。(6) The organic acid retardant consists of at least one of citric acid, tartaric acid, gluconic acid, glutaric acid, glucono delta lactone, malic acid, gallic acid, tannic acid, and the sodium salt or potassium salt of the organic acid. A concrete setting hardening accelerator according to claims (1) to (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6825989A JPH02248351A (en) | 1989-03-20 | 1989-03-20 | Concrete setting hardening accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6825989A JPH02248351A (en) | 1989-03-20 | 1989-03-20 | Concrete setting hardening accelerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02248351A true JPH02248351A (en) | 1990-10-04 |
Family
ID=13368581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6825989A Pending JPH02248351A (en) | 1989-03-20 | 1989-03-20 | Concrete setting hardening accelerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02248351A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724648A1 (en) * | 1994-09-20 | 1996-03-22 | Sandoz Sa | CONTROL OF HYDRATION OF CEMENT-BASED SYSTEMS |
| JP2000239056A (en) * | 1999-02-17 | 2000-09-05 | Denki Kagaku Kogyo Kk | Spraying material and spraying construction method |
| JP2003516303A (en) * | 1999-12-08 | 2003-05-13 | エムビーティー ホールディング アーゲー | Preparation of concrete hardening accelerator |
| JP2021066622A (en) * | 2019-10-21 | 2021-04-30 | 株式会社日本触媒 | Cement additive, cement composition, and cement strength improvement method |
| JP2021066623A (en) * | 2019-10-21 | 2021-04-30 | 株式会社日本触媒 | Cement additive, cement composition, and cement strength improvement method |
-
1989
- 1989-03-20 JP JP6825989A patent/JPH02248351A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724648A1 (en) * | 1994-09-20 | 1996-03-22 | Sandoz Sa | CONTROL OF HYDRATION OF CEMENT-BASED SYSTEMS |
| JP2000239056A (en) * | 1999-02-17 | 2000-09-05 | Denki Kagaku Kogyo Kk | Spraying material and spraying construction method |
| JP2003516303A (en) * | 1999-12-08 | 2003-05-13 | エムビーティー ホールディング アーゲー | Preparation of concrete hardening accelerator |
| JP2021066622A (en) * | 2019-10-21 | 2021-04-30 | 株式会社日本触媒 | Cement additive, cement composition, and cement strength improvement method |
| JP2021066623A (en) * | 2019-10-21 | 2021-04-30 | 株式会社日本触媒 | Cement additive, cement composition, and cement strength improvement method |
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