JPH01257156A - Quick-setting cement composition for spraying method - Google Patents
Quick-setting cement composition for spraying methodInfo
- Publication number
- JPH01257156A JPH01257156A JP8443988A JP8443988A JPH01257156A JP H01257156 A JPH01257156 A JP H01257156A JP 8443988 A JP8443988 A JP 8443988A JP 8443988 A JP8443988 A JP 8443988A JP H01257156 A JPH01257156 A JP H01257156A
- Authority
- JP
- Japan
- Prior art keywords
- quick
- cement
- setting
- alkali
- amount
- 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
- 239000004568 cement Substances 0.000 title claims abstract description 29
- 239000000203 mixture Substances 0.000 title claims abstract description 29
- 238000005507 spraying Methods 0.000 title claims abstract description 20
- 239000003513 alkali Substances 0.000 claims abstract description 28
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 19
- 150000004645 aluminates Chemical class 0.000 claims abstract description 19
- 239000004567 concrete Substances 0.000 claims abstract description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 13
- 239000010452 phosphate Substances 0.000 claims abstract description 13
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012615 aggregate Substances 0.000 claims abstract description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 7
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 7
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims abstract description 6
- 150000008041 alkali metal carbonates Chemical class 0.000 claims abstract description 6
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 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
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 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
- 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
- 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
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 239000000174 gluconic acid Substances 0.000 claims description 2
- 235000012208 gluconic acid Nutrition 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
- 159000000001 potassium salts Chemical class 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 2
- 235000011007 phosphoric acid Nutrition 0.000 claims 1
- 239000011644 potassium salts of orthophosphoric acid Substances 0.000 claims 1
- 235000019858 potassium salts of orthophosphoric acid Nutrition 0.000 claims 1
- 239000011378 shotcrete Substances 0.000 claims 1
- 229910000029 sodium carbonate Inorganic materials 0.000 claims 1
- 239000011643 sodium salts of orthophosphoric acid Substances 0.000 claims 1
- 235000019857 sodium salts of orthophosphoric acid Nutrition 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 10
- 239000003795 chemical substances by application Substances 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000000996 additive effect Effects 0.000 abstract description 8
- 238000004898 kneading Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 4
- 238000013329 compounding Methods 0.000 abstract 3
- 235000021317 phosphate Nutrition 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 150000001735 carboxylic acids Chemical class 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound 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 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000007589 penetration resistance test Methods 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000004684 trihydrates Chemical class 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は道路、水路等のトンネル築造工事や山岳、丘陵
、一般地盤の掘削工事における開削面に安定な覆工壁を
形成せしめるのに効果的な組成物に関するものであり、
土木建築分野において有効に利用されるものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention is effective in forming a stable lining wall on an excavated surface in tunnel construction work for roads, waterways, etc., and excavation work in mountains, hills, and general ground. It relates to a composition of
It is effectively used in the field of civil engineering and construction.
［従来の技術と問題点コ
従来から、開削面へ覆工壁を形成せしめるにはセメント
、骨材、急結剤及び水を混合し、速やかに吹付ける工法
（吹付は工法）が一般に行われており、急結剤としては
、アルミン酸カルシウム等を主体とした粉末品（セメン
ト鉱物系）とアルミン酸アルカリ、炭酸アルカリ等を主
体とした液体品とが用いられている。吹付は方法として
は現在、セメント、骨材、水よりなるまだ固まらないコ
ンクリートに、急結剤を吹付はノズルの先端部分まで所
定の添加装置で搬送し、混合して吹付ける湿式１法が主
流となっている。[Conventional technology and problems] Traditionally, in order to form a lining wall on an excavated surface, a method of mixing cement, aggregate, quick-setting agent, and water and immediately spraying the mixture (spraying is a construction method) has been generally performed. As the quick setting agent, powder products (cement mineral type) mainly composed of calcium aluminate and the like and liquid products mainly composed of alkali aluminate, alkali carbonate, etc. are used. Currently, the mainstream method for spraying is the wet method, in which a quick-setting agent is conveyed to the tip of the nozzle using a designated additive device, mixed and sprayed onto unhardened concrete made of cement, aggregate, and water. It becomes.
しかしながら湿式吹付は工法用急結剤としては粉末品は
、急結性能は優れるが、添加装置の定量精度が低く、又
吹付は機械のメンテナンスに経費がかかりトラブルも多
いという欠点があり、液体品は定量添加精度、機械のメ
ンテナンス性は良いが、急結能力が不十分で吹付は面に
十分な厚さのコンクリートが覆工できないという欠点が
あった。However, wet spraying has the disadvantage that powder products have excellent quick setting performance as quick setting agents for construction methods, but the quantitative accuracy of the adding equipment is low, and spraying requires expensive machine maintenance and is often troublesome. Although the quantitative addition accuracy and machine maintainability were good, the rapid setting ability was insufficient, and spraying had the disadvantage that it was not possible to line the surface with concrete of sufficient thickness.
このような状況であるため、この分野の業界においては
、定量添加精度が良く機械的メンテナンスが容易な液体
品の急結剤て、かつ厚い吹付けに耐えうる高性能な製品
が強く望まれている。Because of this situation, there is a strong demand in this industry for a liquid quick-setting agent with good metering accuracy and easy mechanical maintenance, and a high-performance product that can withstand thick spraying. There is.
［問題点を解決する為の手段］
本発明者らは、上記従来技術の有する欠点を改良するた
め、定量添加精度が良く、機械的にもメンテナンスが容
易でトラブルの少ない液体急結剤の特長を有し、かつ厚
い吹付けに耐える急結能力を兼ね備えた吹付は工法用急
結性セメント組成物を提供せんとするものである。[Means for Solving the Problems] In order to improve the drawbacks of the above-mentioned prior art, the present inventors have developed a liquid quick-setting agent that has good quantitative addition accuracy, is mechanically easy to maintain, and has few troubles. It is an object of the present invention to provide a quick-setting cement composition for use in spraying construction methods, which has a quick-setting ability that can withstand thick spraying.
本発明者らはこのような特質を付与すべく種々検討した
結果、添加物を２通りに分け、一方はリン酸塩あるいは
リン酸塩と有機カルボン酸類を主体とした粉末添加物の
形態であり、予めコンクリート混練時に加えておき、こ
の練り上がったコンクリートに、もう一方の液体添加物
であるアルミン酸アルカリあるいはアルミン酸アルカリ
及び炭酸アルカリの水溶液を添加すると、従来の液体急
結剤にはみられない急結性能が得られることをみいだし
、これらの目的にかなう組成物として本発明を完成する
に至った。すなわち本発明は、セメントと水及び骨材を
混練して吹付は工法用コンクリート混練物を調合し、該
混練物にアルミン酸アルカリあるいはアルミン酸アルカ
リ及び炭酸アルカリの水溶液を添加して急結せしめるに
当り、該混練物調合時に、予め
■）リン酸塩、あるいは
２）リン酸塩と有機カルボン酸、又はその塩３）水酸化
カルシウム
４）アルカリ金属炭酸塩及び、又は
５）アルカリ金属水酸化物
を添加することを特長とする吹付は工法用急結性セメン
ト組成物である。As a result of various studies aimed at imparting these characteristics, the present inventors divided the additive into two types: one is in the form of a powdered additive mainly consisting of phosphates or phosphates and organic carboxylic acids; , is added in advance during concrete mixing, and when the other liquid additive, alkali aluminate or an aqueous solution of alkali aluminate and alkali carbonate, is added to the mixed concrete, a They have found that it is possible to obtain rapid setting performance, and have completed the present invention as a composition that meets these objectives. That is, the present invention involves mixing cement, water, and aggregate to prepare a concrete mixture for spraying, and adding an alkali aluminate or an aqueous solution of an alkali aluminate and an alkali carbonate to the mixture to cause rapid setting. At the time of preparing the kneaded material, in advance, ■) phosphate, or 2) phosphate and organic carboxylic acid, or its salt, 3) calcium hydroxide, 4) alkali metal carbonate, and/or 5) alkali metal hydroxide. Spraying is a quick-setting cement composition for construction methods that is characterized by the addition of.
本発明に用いられるリン酸塩とは、オルトリン酸塩とし
て、第一リン酸、第ニリン酸、第三リン酸等であり、縮
合リン酸塩として、トリポリリン酸、テトラポリリン酸
、ペンタポリリン酸、ウルトラポリリン酸、ヘキサメタ
リン酸、ビロリン酸等であり、これらのナトリウム塩及
びカリウム塩から選ばれた少なくとも１種が、通常セメ
ント量に対して０．０５〜０．６重量％使用され、更に
望ましくは０．１〜０．４重量％使用される。この量が
０．０５％以下になると急結能力が低下し実用範囲外と
なり０．５％を越えると１日以内の強度が低下するので
好ましくない。The phosphates used in the present invention include orthophosphates such as primary phosphoric acid, diphosphoric acid, tertiary phosphoric acid, etc., and condensed phosphates such as tripolyphosphoric acid, tetrapolyphosphoric acid, pentapolyphosphoric acid, pentapolyphosphoric acid, Ultrapolyphosphoric acid, hexametaphosphoric acid, birophosphoric acid, etc., and at least one selected from sodium salts and potassium salts thereof is usually used in an amount of 0.05 to 0.6% by weight based on the amount of cement, and more preferably 0.1-0.4% by weight is used. If this amount is less than 0.05%, the rapid setting ability decreases and is out of the practical range, and if it exceeds 0.5%, the strength within one day decreases, which is not preferable.
本発明に用いられる有機カルボン酸、又はその塩とは、
クエン酸、酒石酸、グルコン酸又はそのナトリウム塩及
びカリウム塩より選ばれた少なくとも１種であり、上記
リン酸とこれらを併用することにより、リン酸塩単独、
あるいは有機カルボン酸塩単独（特願昭６３−１８２９
２）で使用した場合より、更に効果を上げろことができ
ろ。添加量は通常、セメント量に対して０．０１〜０．
２ｍｍ％使用され、更に望ましくは０．０３〜０．１％
である。The organic carboxylic acid or salt thereof used in the present invention is
At least one selected from citric acid, tartaric acid, gluconic acid, or its sodium salt and potassium salt, and by using these together with the above phosphoric acid, phosphate alone,
Or organic carboxylate alone (patent application 1829-1989)
It can be even more effective than when used in 2). The amount added is usually 0.01 to 0.0% relative to the amount of cement.
2 mm% is used, more preferably 0.03 to 0.1%
It is.
この量が０．０１％以下になるとリン酸塩との併用効果
が小さくなり、０．２％を越えろと１日以内の強度発現
が低下するので好ましくない。If this amount is less than 0.01%, the effect of the combination with phosphate will be reduced, and if it exceeds 0.2%, the strength development within one day will decrease, which is not preferable.
本発明に用いられる水酸化カルシウムは通常セメント量
に対して０．５〜４．０重量％用いられ、更に望ましく
は１．０〜３．０重量％である。この量が０．５％以下
になると初期２分以内の急結能力が低下し、４．０％を
越えると５分以後の急結能力が低下するので好ましくな
い。又水酸化カルシウム分は生石灰でも使用可能であり
、更に同様なカルシウム塩である石膏（半水及び三水塩
）により５０％まで置換することが可能である。Calcium hydroxide used in the present invention is usually used in an amount of 0.5 to 4.0% by weight, more preferably 1.0 to 3.0% by weight, based on the amount of cement. If this amount is less than 0.5%, the quick-setting ability within the initial 2 minutes will decrease, and if it exceeds 4.0%, the quick-setting ability after 5 minutes will decrease, which is not preferable. Also, quicklime can be used as the calcium hydroxide component, and up to 50% can be replaced with gypsum (hemihydrate and trihydrate), which are similar calcium salts.
本発明に用いられる予めコンクリート混練時に添加され
ろアルカリ金属炭酸塩及びアルカリ金属水酸化物はナト
リウム、カリウム等の炭酸塩及び水酸化物であり、添加
量は通常、セメン１４に対して０．５〜４．０重量％使
用され、更に望ましくは１．０〜３．０重塁％である。The alkali metal carbonates and alkali metal hydroxides used in the present invention, which are added in advance during concrete mixing, are carbonates and hydroxides of sodium, potassium, etc., and the amount added is usually 0.5 to 14 cement. It is used in an amount of 4.0% by weight, more preferably 1.0 to 3.0% by weight.
この量が０．５％以下になるとコンクリートの初期強度
が小さくなり、４．０％を越えるとまだ固まらないコン
クリートのスランプロスが大きくなるので好ましくない
。If this amount is less than 0.5%, the initial strength of the concrete will be low, and if it exceeds 4.0%, the slump loss of the unhardened concrete will increase, which is not preferable.
本発明に用いられる水溶性アルミン酸アルカリ、炭酸ア
ルカリは通常、一般に使用されているナトリウム、カリ
ウム等のアルミン酸塩、炭酸塩であり、アルミン酸アル
カリ単独で、あるいはアルミン酸アルカリと炭酸アルカ
リの組合せで使用され更に又液体添加物のかわりに、粉
末品であるアルミン酸カルシウムを使用してもより効果
を上げろことが可能である。使用量はアルミン酸アルカ
リ単独の場合、固形分としてセメン）ｆｌに対して０．
５〜５，０重量％てあり、望ましくは１．０〜３．０重
量％である。使用量が０．５％以下になると、急結力が
不十分となり、５．０％以上では過添加効果が現れて性
能が低下するので好ましくない。アルミン酸アルカリと
炭酸アルカリを併用する場合も、使用量は固形分として
それぞれ０．５〜５．０重量％で望ましくは１．０〜３
．０重量％てあり、合計の使用量が１．０％以下かある
いは１０％以上になると性能低下を引き起こすので好ま
しくない。The water-soluble alkali aluminate and alkali carbonate used in the present invention are usually commonly used aluminates and carbonates of sodium, potassium, etc., and the alkali aluminate alone or a combination of alkali aluminate and alkali carbonate. It is also possible to use powdered calcium aluminate instead of the liquid additive to achieve better effects. In the case of using alkali aluminate alone, the amount used is 0.0% per fl of cement as solid content.
The content is 5 to 5.0% by weight, preferably 1.0 to 3.0% by weight. If the amount used is less than 0.5%, the rapid setting power will be insufficient, and if it is more than 5.0%, an over-addition effect will appear and the performance will deteriorate, which is not preferable. When alkali aluminate and alkali carbonate are used together, the amount used is 0.5 to 5.0% by weight, preferably 1.0 to 3% by weight as solid content.
．． 0% by weight, and if the total amount used is less than 1.0% or more than 10%, it is not preferable because it causes performance deterioration.
［作用、効果］
従来から、セメント、骨材、水を混練したコンクリート
配合物にアルミン酸アルカリ、炭酸アルカリ等を主体と
した液体急結剤を添加することは公知であり、更に又特
願昭６３−１８２９２の様に、有機カルボン酸類と水酸
化カルシウムとアルカリ金属炭酸塩及び、又はアルカリ
金属水酸化物を予め混練したコンクリート配合物に、ア
ルミン酸アルカリあるいはアルミン酸アルカリ及び炭酸
アルカリの水溶液を加えると、優れた急結組成物ができ
ることも知られているが、リン酸塩についても同様な使
用方法にて有機カルボン酸類と同じ効果が認められ、更
に又リン酸塩と有機カルボン酸類を併用すると相乗効果
により更に性能が向上し、各々単独で使用するよりも格
段に優れた急結性能を示す組成物が得られる。[Function and Effect] It has been known to add a liquid quick-setting agent mainly composed of alkali aluminate, alkali carbonate, etc. to a concrete mixture prepared by kneading cement, aggregate, and water. 63-18292, an aqueous solution of alkali aluminate or alkali aluminate and alkali carbonate is added to a concrete mixture in which organic carboxylic acids, calcium hydroxide, alkali metal carbonate, and/or alkali metal hydroxide are mixed in advance. It is also known that excellent rapid-setting compositions can be produced with phosphates, but the same effects as organic carboxylic acids have been observed when used in the same manner, and furthermore, when phosphates and organic carboxylic acids are used together, The synergistic effect further improves the performance, resulting in a composition that exhibits rapid setting performance that is much better than when each is used alone.
本発明組成物の作用としては、
（１）従来型液体急結剤の特長は、その定量性と添加装
置等のメンテナンス性の良さにあり、本発明品の場合も
同様で、液体添加剤は従来装置で搬送し、粉体添加剤は
予めコンクリート混練時に添加しておく為、定量性とメ
ンテナンス性に優れ、従って作業者の使用感は従来の液
体急結剤の場合と同様である。The effects of the composition of the present invention are as follows: (1) The characteristics of the conventional liquid quick-setting agent are its quantitative property and the ease of maintenance of the addition device, etc. The same applies to the product of the present invention. Because it is transported using conventional equipment and the powder additive is added in advance during concrete mixing, it has excellent quantitative performance and ease of maintenance, and the operator's experience when using it is similar to that of conventional liquid quick-setting additives.
（２）凝結の初期、後期とも優れた急結性能を示すため
、付着性に優れ、剥落も極めて少なくなることが予想さ
れる。(2) Since it exhibits excellent rapid setting performance both in the early and late stages of setting, it is expected that it will have excellent adhesion and extremely little peeling.
本吹付は工法用急結性セメント組成物は上記の作用によ
り安定した吹付けが可能となり、作業性が向上する、材
料のロスが少なくなる等、著しいコスト低減につながり
、しかも強固な覆工壁を築造することができる。This quick-setting cement composition for construction method enables stable spraying due to the above-mentioned effects, improves workability, reduces material loss, and leads to significant cost reductions, as well as strong lining walls. can be built.
次に実施例をもって本発明を説明する。Next, the present invention will be explained with reference to examples.
実施例１
表−１に、リン酸塩単独で使用した場合の本発明組成物
に関するブロクター貫入抵抗試験（ＡＳＴＭ Ｃ４０３
−６３：モルタル等の凝結、硬化測定試験）結果を示し
た。試験ブロックの作成は、セメント： ５００ｇ、細
骨材（Ｆ、Ｍ＝２．８）： １９００ｇ、水： ３００
ｇ、及び粉末添加物を５９．モルタルミキサーにて２分
間混合し、その後アルミン酸カリウムあるいはアルミン
酸カリウムと炭酸カリウムの混合水溶液を添加して、素
早くつき固めを行う方法でおこなった。Example 1 Table 1 shows the Broctor Penetration Resistance Test (ASTM C403) for the composition of the present invention when phosphate alone is used.
-63: Test for measuring setting and hardening of mortar, etc.) Results are shown. The test block was created using: cement: 500g, fine aggregate (F, M=2.8): 1900g, water: 300g.
g, and powder additives at 59.g. The mixture was mixed for 2 minutes using a mortar mixer, and then potassium aluminate or a mixed aqueous solution of potassium aluminate and potassium carbonate was added to quickly compact the mixture.
表−１によれば、本発明の組成物は比較例１．２．５と
の比較でも明かなように、凝結の初期及び後期とも従来
品に比べ格段に優れている事が分かり、更に比較例３．
４と比べても遜色なく、リン酸塩が特願昭６３−１８２
９２に示される有機カルボン酸類と同様な効果をもつこ
とがわかる。According to Table 1, as is clear from the comparison with Comparative Example 1.2.5, it can be seen that the composition of the present invention is significantly superior to the conventional product in both the early and late stages of setting. Example 3.
It is comparable to 4, and the phosphate was patented in 1882, 1983.
It can be seen that it has the same effect as the organic carboxylic acids shown in No. 92.
又液体添加物がアルミン酸アルカリ単独、あるいは炭酸
塩と併用時の、両ケースとも効果のあることがわかる。It can also be seen that the liquid additive is effective in both cases, when using alkali aluminate alone or in combination with carbonate.
実施例２
実施例１に記載されているのと同様なセメント細骨（オ
、水の比率で、同じ試験法にて、リン酸塩と有機カルボ
ン酸類の併用による相乗効果を示した。Example 2 Using the same test methods as those described in Example 1, using the same cement bone (e) and water ratios, a synergistic effect was shown by the combined use of phosphate and organic carboxylic acids.
表−２によれは本発明組成物は比較例１〜４との比較で
も明かなように有機カルボン酸類単独、あるいはリン酸
塩単独で使用するよりも、格段に急結性能が優れている
ことがわかる。According to Table 2, the composition of the present invention has much better rapid setting performance than the use of organic carboxylic acids alone or phosphate alone, as is clear from the comparison with Comparative Examples 1 to 4. I understand.
Claims (5)
ンクリート混練物を調合し、該混練物にアルミン酸アル
カリあるいはアルミン酸アルカリ及び炭酸アルカリの水
溶液を添加して急結せしめるに当り、該混練物調合時に
、予め１）リン酸塩、あるいは ２）リン酸塩と有機カルボン酸、又はその塩３）水酸化
カルシウム ４）アルカリ金属炭酸塩及び、又は ５）アルカリ金属水酸化物 を添加することを特長とする吹付け工法用急結性セメン
ト組成物。(1) Mix cement, water, and aggregate to prepare a concrete mixture for shotcrete construction, and add an alkali aluminate or an aqueous solution of an alkali aluminate and an alkali carbonate to the mixture for rapid setting. When preparing the kneaded material, 1) a phosphate, or 2) a phosphate and an organic carboxylic acid, or a salt thereof, 3) calcium hydroxide, 4) an alkali metal carbonate, and/or 5) an alkali metal hydroxide are added in advance. A quick-setting cement composition for spraying construction.
リウム塩及びカリウム塩から選ばれた少なくとも１種で
あり、添加量がセメント量に対して０．０５〜０．６重
量％である「特許請求の範囲第（１）項」に記載の吹付
け工法用急結性セメント組成物。(2) The phosphate is at least one selected from sodium salts and potassium salts of orthophosphoric acid and condensed phosphoric acid, and the amount added is 0.05 to 0.6% by weight based on the amount of cement. A quick-setting cement composition for spraying construction according to claim (1).
酸、グルコン酸及びこれらのナトリウム塩及びカリウム
塩から選ばれた少なくとも１種であり、添加量がセメン
ト量に対して０．０１〜０．２重量％である「特許請求
の範囲第（１）項又は第（２）項」に記載の吹付け工法
用急結性セメント組成物。(3) The organic carboxylic acid or its salt is at least one selected from citric acid, tartaric acid, gluconic acid, and their sodium salts and potassium salts, and the amount added is 0.01 to 0 with respect to the amount of cement. .2% by weight of the quick-setting cement composition for spraying method according to "Claim (1) or (2) of the Claims".
て０．５〜４．０重量％である「特許請求の範囲第（１
）項又は第（２）項又は第（３）項」に記載の吹付け工
法用急結性セメント組成物。(4) The amount of calcium hydroxide added is 0.5 to 4.0% by weight based on the amount of cement.
) or (2) or (3).
カリ金属炭酸塩及びアルカリ金属水酸化物がそれぞれ炭
酸ナトリウム、炭酸カリウム及び水酸化ナトリウム、水
酸化カリウムから選ばれた少なくとも１種であり、添加
量がセメントに対して０．５〜４．０重量％である「特
許請求の範囲第（１）項又は第（２）項又は第（３）項
又は第４項」に記載の吹付け工法用急結性セメント組成
物。(5) The alkali metal carbonate and alkali metal hydroxide added in advance during concrete mixing are at least one selected from sodium carbonate, potassium carbonate, sodium hydroxide, and potassium hydroxide, and the amount added is 0.5 to 4.0% by weight based on cement, the spraying method recited in "Claim (1) or (2) or (3) or (4)" Settling cement composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8443988A JPH01257156A (en) | 1988-04-06 | 1988-04-06 | Quick-setting cement composition for spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8443988A JPH01257156A (en) | 1988-04-06 | 1988-04-06 | Quick-setting cement composition for spraying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01257156A true JPH01257156A (en) | 1989-10-13 |
Family
ID=13830624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8443988A Pending JPH01257156A (en) | 1988-04-06 | 1988-04-06 | Quick-setting cement composition for spraying method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01257156A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH680730A5 (en) * | 1990-07-09 | 1992-10-30 | Sika Ag | |
| US5413819A (en) * | 1990-01-27 | 1995-05-09 | Sandoz Ltd. | Shotcrete compositions |
| US5591259A (en) * | 1994-09-20 | 1997-01-07 | Sandoz Ltd. | Rapid setting cementitious compositions and method |
| US5629048A (en) * | 1994-09-20 | 1997-05-13 | Sandoz Ltd. | Rapid setting cementitious compositions and method |
| US5634972A (en) * | 1994-09-20 | 1997-06-03 | Sandoz Ltd. | Hydration control of cementitious systems |
| JP2007062263A (en) * | 2005-09-01 | 2007-03-15 | Tekken Constr Co Ltd | Controlling method of concrete setting time and constructing and reinforcing method of concrete structure by using controlling method of concrete setting time |
-
1988
- 1988-04-06 JP JP8443988A patent/JPH01257156A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5413819A (en) * | 1990-01-27 | 1995-05-09 | Sandoz Ltd. | Shotcrete compositions |
| CH680730A5 (en) * | 1990-07-09 | 1992-10-30 | Sika Ag | |
| US5591259A (en) * | 1994-09-20 | 1997-01-07 | Sandoz Ltd. | Rapid setting cementitious compositions and method |
| US5629048A (en) * | 1994-09-20 | 1997-05-13 | Sandoz Ltd. | Rapid setting cementitious compositions and method |
| US5634972A (en) * | 1994-09-20 | 1997-06-03 | Sandoz Ltd. | Hydration control of cementitious systems |
| US5895525A (en) * | 1994-09-20 | 1999-04-20 | Mbt Holding Ag | Rapid setting cementitious compositions and method |
| JP2007062263A (en) * | 2005-09-01 | 2007-03-15 | Tekken Constr Co Ltd | Controlling method of concrete setting time and constructing and reinforcing method of concrete structure by using controlling method of concrete setting time |
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