JPH0476941B2 - - Google Patents
Info
- Publication number
- JPH0476941B2 JPH0476941B2 JP59157050A JP15705084A JPH0476941B2 JP H0476941 B2 JPH0476941 B2 JP H0476941B2 JP 59157050 A JP59157050 A JP 59157050A JP 15705084 A JP15705084 A JP 15705084A JP H0476941 B2 JPH0476941 B2 JP H0476941B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- cement
- parts
- pot life
- hardening
- 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.)
- Expired - Lifetime
Links
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 27
- 239000004568 cement Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 11
- 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 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 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 5
- 239000000174 gluconic acid Substances 0.000 claims description 5
- 235000012208 gluconic acid Nutrition 0.000 claims description 5
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 4
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 claims description 2
- 230000037213 diet Effects 0.000 claims description 2
- 235000005911 diet Nutrition 0.000 claims description 2
- 229940050410 gluconate Drugs 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 229920003086 cellulose ether Polymers 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive 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
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009415 formwork Methods 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
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229920013819 hydroxyethyl ethylcellulose Polymers 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 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 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 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
- 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
- C04B28/06—Aluminous cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
（産業上の利用分野）
本発明はセメント系凝結調節組成物に関し、特
には水硬性セメント混合物の可使時間を調節し、
その後の硬化の立ちあがりが速く、かつ硬化物の
強度がすぐれているセメント系凝結調節組成物の
提供を目的とする。
（従来の技術）
近年、コンクリートあるいはモルタルによる土
木、建築などの施工において工期短縮、型枠の使
用回転率向上などの対策が重要視され、早期強度
増進が望まれており、またモルタルの二次製品等
を製造するに際し、流し終えるまでの可使時間中
はワーカビリテイが安定でその後は作業能率向上
のためや、積み重ね養生をさせたいなどのため、
できるだけ速い硬化が望まれている。
従来、セメントの硬化を促進せしめる物質（硬
化促進剤）として、ケイ酸ナトリウム、アルミン
酸ナトリウム、炭酸ナトリウム、塩化カルシウム
等が知られている。そしてこれらの促進剤は止水
用急硬剤、吹付用急結剤、早期脱型用硬化促進
剤、寒中コンクリート防凍剤等に使われている。
また一方、炭酸塩などの硬化促進剤とオキシカ
ルボン酸などの硬化遅延剤との併用、あるいはジ
エツトセメントとクエン酸、またはアルミナセメ
ントとクエン酸との併用等によつて硬化の速さを
調節することは公知であり、一部で実用化されて
いる。しかし、これら硬化促進剤単味あるいは
種々の併用系は、すべて添加量にもよるが、硬化
は速いが可使時間は比較的短かいかあるいは可使
時間がとれないものであつたり、また可使時間が
とれても硬化の立ちあがりがよくなかつたりし、
さらにまた硬化物の強度低下等の欠点がみられ、
満足されるものではなかつた。
（発明の構成）
本発明者らはかかる従来の不利欠点を解決すべ
く鋭意研究を重ね、各種添加剤を試験した結果、
本発明に到達したもので、これは普通セメント
100重量部に対して、アルカリ金属炭酸塩0.05〜
２重量部、クエン酸もしくはクエン酸塩0.01〜
0.5重量部、アルミナセメントもしくはジエツト
セメント0.5〜15重量部およびグルコン酸もしく
はグルコン酸塩0.01〜0.5重量部添加してなるセ
メント系凝結調節組成物に関するもので、あるい
はさらに水溶性非イオンセルロースエーテルを添
加してなる該組成物に関するものである。
以下本発明を詳細に説明する。
本発明にしたがい、硬化促進剤である炭酸塩と
硬化遅延剤であるクエン酸（塩）を用い、さらに
アルミナセメントあるいはジエツトセメントとグ
ルコン酸（塩）を併用することにより、下記(1)〜
(3)に述べるように際立つた効果が得られるが、促
進剤および遅延剤のうち炭酸塩およびクエン酸
（塩）以外の併用ではかかる効果を達成すること
ができない。
（発明の効果）
(1) 本発明によるセメント系組成物は、数十分の
可使用時間がとれ、かつ硬化の立ちあがりが速
く強度のすぐれた硬化物が得られる。
(2) 本願発明ではとくにグルコン酸（塩）を添加
することにより、可使時間を自由に調節でき、
可使時間中のワーカビリテイの経時変化は非常
に小さくプレーンなみであり、かつ硬化の立ち
あがり速く強度のすぐれた硬化物が得られる。
(3) 本発明にしたがいさらに水溶性非イオンセル
ロースエーテルを添加することにより、前記し
た諸効果に加えてブリージングが少なくなり、
保水性、作業性が改善され、下地あるいは鉄
筋、打継面との接着力が強く、強度のすぐれた
硬化物が得られる。
本発明のセメント系凝結調節組成物において、
アルカリ金属炭酸塩およびクエン酸（塩）さらに
アルミナセメント（もしくはジエツトセメント）
の３成分は相乗効果により、可使時間経過後の硬
化の立ちあがりをきわめて速く促進させる作用を
示し、これらのうちどの１成分が欠けても満足な
硬化促進作用は得られない。たとえばアルミナセ
メント（もしくはジエツトセメント）とクエン酸
（塩）の２成分では硬化を促進させることはでき
るが、十分な可使時間をとることができず、また
炭酸塩とクエン酸（塩）の２成分ではある程度の
硬化の促進はみられるが不十分であり、これにア
ルミナセメント（もしくはジエツトセメント）を
加えることにより硬化促進効果が向上し安定化す
る。さらにグルコン酸（塩）を添加しその添加量
を変えることにより可使時間を自由に調節するこ
とが可能となる。
また本発明の各種添加剤を併用することによ
り、併用しない場合に比べて、減水効果が得られ
るので、収縮が小さく強度のすぐれた硬化物が得
られる。
普通セメント100重量部に対するアルカリ金属
炭酸塩の添加量は、0.05〜２重量部（好ましくは
0.1〜1.5重量部）とすることが必要とされ、これ
より少ないと硬化促進の効果が低下し、多いと可
使時間の調節が困難となり短かくなる。クエン酸
（塩）の添加量は0.01〜0.5重量部（好ましくは
0.05〜0.4重量部）とする必要があり、これより
少なくても多くても硬化促進効果が低下する。さ
らにアルミナセメント（あるいはジエツトセメン
ト）の添加量は0.5〜15重量部（好ましくは１〜
10重量部）であり、これより少ないと硬化促進の
効果が低下し、多いと可使時間の調節が困難とな
る。
上記した添加剤の組合せで約30分程度の可使時
間はとれるが、これにさらにグルコン酸（塩）を
添加することにより可使時間を延長することがで
きる。この添加量を多くするとそれに応じ可使時
間が延長されるが、しかし多すぎると硬化促進の
効果に悪影響が現われるので、普通セメント100
重量部当り0.5重量部以下（好ましくは0.4重量部
以下）とすることが必要とされる。
なお、可使時間延長の効果が現われるのは0.01
重量部程度からであり、これより少ない添加量で
は実質的に意味がない。
必要に応じ添加される水溶性非イオンセルロー
スエーテルとしては、メチルセルロース、ヒドロ
キシプロピルメチルセルロース、ヒドロキシエチ
ルエチルセルロース、ヒドロキシエチルセルロー
ス、ヒドロキシプロピルセルロースなどが例示さ
れる。これらセルロースエーテルの一般的添加量
は普通セメント100重量部当り0.02〜１重量部の
範囲であり、この範囲では可使時間の調節や硬化
促進の硬化に悪影響を与えることはない。
本発明のセメント系凝結調節組成物において、
普通セメントとしては普通ポルトランドセメント
が主体であるが、ほかにフライアツシユセメン
ト、高炉セメント等のセメントや石コウ、消石
灰、炭酸カルシウム、ベントナイト、粘土等を併
用してもよい。さらに骨材としては川砂、山砂、
けい砂、寒水砂、軽量骨材などが用いられる。こ
のほか必要に応じて減水剤、AE剤、消泡剤、収
縮低減材、エマルジヨン、繊維物質等を配合して
も差支えない。
つぎに具体的実施例をあげる。
実施例 １
第１表に示すとおりのセメントモルタル組成物
（実験No.１〜７）を調製し、これらについて経時
的フロー値、圧縮強度を測定し、可使時間、硬化
速度を評価した。結果を同表に示すとおりであつ
た。また注水後の経過時間に対する硬化挙動をグ
ラフにしたところ、実験No.１〜No.７のそれぞれは
曲線１〜７に示すとおりであつた。
(Industrial Application Field) The present invention relates to a cementitious setting control composition, particularly for controlling the pot life of hydraulic cement mixtures, and
The purpose of the present invention is to provide a cement-based setting control composition that has a rapid rise in subsequent curing and has excellent strength as a cured product. (Conventional technology) In recent years, measures such as shortening the construction period and increasing the rotation rate of formwork have been emphasized in civil engineering and architectural construction using concrete or mortar. When manufacturing products, etc., workability is stable during the pot life until finishing pouring, and after that, to improve work efficiency or to allow cumulative curing, etc.
Curing as quickly as possible is desired. Conventionally, sodium silicate, sodium aluminate, sodium carbonate, calcium chloride, and the like have been known as substances (hardening accelerators) that accelerate the hardening of cement. These accelerators are used as quick hardening agents for water stopping, quick setting agents for spraying, hardening accelerators for early demolding, antifreezing agents for concrete in cold weather, etc. On the other hand, the speed of hardening can be adjusted by using a combination of a hardening accelerator such as carbonate and a hardening retardant such as oxycarboxylic acid, or a combination of jet cement and citric acid, or alumina cement and citric acid. This is known and has been put into practical use in some cases. However, depending on the amount added, these curing accelerators alone or in combination may have a relatively short pot life, or may not have a long pot life, depending on the amount added. Even if you use it for a long time, it may not cure well,
Furthermore, there are drawbacks such as reduced strength of the cured product,
It wasn't satisfying. (Structure of the Invention) The present inventors have conducted extensive research in order to solve the conventional disadvantages, and as a result of testing various additives,
The present invention has been achieved, and this is made using ordinary cement.
Alkali metal carbonate 0.05 to 100 parts by weight
2 parts by weight, citric acid or citrate 0.01~
0.5 parts by weight, 0.5 to 15 parts by weight of alumina cement or diet cement, and 0.01 to 0.5 parts by weight of gluconic acid or gluconate; The present invention relates to the composition in which the compound is added. The present invention will be explained in detail below. According to the present invention, the following (1) to
Although a remarkable effect can be obtained as described in (3), such an effect cannot be achieved by using a combination of accelerators and retarders other than carbonate and citric acid (salt). (Effects of the Invention) (1) The cement-based composition according to the present invention has a pot life of several tens of minutes, has a quick start-up, and can provide a cured product with excellent strength. (2) In the present invention, especially by adding gluconic acid (salt), the pot life can be freely adjusted.
The change in workability over time during the pot life is very small and almost as good as that of a plain product, and the cured product has a quick start-up and excellent strength. (3) By further adding water-soluble nonionic cellulose ether according to the present invention, in addition to the above-mentioned effects, breathing is reduced,
A cured product with improved water retention and workability, strong adhesion to the base, reinforcing bars, and joint surfaces, and excellent strength can be obtained. In the cementitious setting control composition of the present invention,
Alkali metal carbonates and citric acid (salts) and alumina cement (or jet cement)
Due to their synergistic effect, these three components have the effect of extremely quickly accelerating the start of curing after the pot life has elapsed, and if any one of these components is missing, a satisfactory curing accelerating effect cannot be obtained. For example, although it is possible to accelerate hardening with the two components of alumina cement (or jet cement) and citric acid (salt), it does not provide sufficient pot life, and the combination of carbonate and citric acid (salt) Although the two components promote hardening to some extent, it is insufficient, and by adding alumina cement (or jet cement) to this, the hardening promoting effect is improved and stabilized. Furthermore, by adding gluconic acid (salt) and changing the amount added, it becomes possible to freely adjust the pot life. Furthermore, by using the various additives of the present invention in combination, a water-reducing effect can be obtained compared to when they are not used together, so that a cured product with less shrinkage and excellent strength can be obtained. The amount of alkali metal carbonate added to 100 parts by weight of ordinary cement is 0.05 to 2 parts by weight (preferably
(0.1 to 1.5 parts by weight); if it is less than this, the effect of accelerating curing will be reduced, and if it is more than this, it will be difficult to control the pot life and it will be shortened. The amount of citric acid (salt) added is 0.01 to 0.5 parts by weight (preferably
(0.05 to 0.4 parts by weight), and if it is less or more than this, the curing accelerating effect will decrease. Furthermore, the amount of alumina cement (or jet cement) added is 0.5 to 15 parts by weight (preferably 1 to 15 parts by weight).
(10 parts by weight); if it is less than this, the effect of accelerating curing will be reduced, and if it is more than this, it will be difficult to adjust the pot life. A pot life of about 30 minutes can be obtained by combining the above additives, but the pot life can be extended by further adding gluconic acid (salt). If the amount added is increased, the pot life will be extended accordingly, but if it is too much, the effect of accelerating hardening will be adversely affected.
It is required that the amount per part by weight be 0.5 part by weight or less (preferably 0.4 part by weight or less). Note that the effect of pot life extension appears at 0.01
The amount is about parts by weight, and if the amount is less than this, it is essentially meaningless. Examples of the water-soluble nonionic cellulose ether that may be added as necessary include methylcellulose, hydroxypropylmethylcellulose, hydroxyethylethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose. The general amount of these cellulose ethers added is in the range of 0.02 to 1 part by weight per 100 parts by weight of ordinary cement, and within this range there will be no adverse effect on adjustment of pot life or on hardening acceleration. In the cementitious setting control composition of the present invention,
The main type of ordinary cement is ordinary Portland cement, but other cements such as fly ash cement and blast furnace cement, gypsum, slaked lime, calcium carbonate, bentonite, clay, etc. may also be used in combination. Furthermore, as aggregates, river sand, mountain sand,
Silica sand, cold water sand, lightweight aggregate, etc. are used. In addition, water reducing agents, AE agents, antifoaming agents, shrinkage reducing agents, emulsions, fiber substances, etc. may be added as necessary. Next, a specific example will be given. Example 1 Cement mortar compositions (Experiments Nos. 1 to 7) as shown in Table 1 were prepared, and their temporal flow values and compressive strengths were measured, and their pot life and hardening speed were evaluated. The results were as shown in the same table. Further, when the curing behavior with respect to the elapsed time after water injection was graphed, the results were as shown in curves 1 to 7 for Experiments No. 1 to No. 7, respectively.
【表】
実施例 ２
第２表に示すとおりのセメントモルタル組成物
（実験No.８〜12）を調製し、これらについて前例
と同様の諸測定を行うと共に、セルロースエーテ
ルの効果のみるためにブリージング率と接着強度
を測定した。結果は第２表に示すとおりであつ
た。また注水後の経過時間に対する硬化挙動をグ
ラフにしたところ、実験No.８〜No.12のそれぞれは
曲線８〜１２に示すとおりであつた。[Table] Example 2 Cement mortar compositions (Experiments No. 8 to 12) as shown in Table 2 were prepared, and the same measurements as in the previous example were carried out. The rate and adhesive strength were measured. The results were as shown in Table 2. Further, when the curing behavior with respect to the elapsed time after water injection was graphed, the results were as shown in curves 8 to 12 for Experiments No. 8 to No. 12, respectively.
単位セメント量 300Kg／m3、 細骨材率40％、単位水量 170Kg／m3、 混和剤量 第３表に示すとおり（対センメト％） Unit amount of cement: 300Kg/m 3 , Fine aggregate rate: 40%, Unit water amount: 170Kg/m 3 , Admixture amount: As shown in Table 3 (% of cement)
【表】【table】
第１図および第２図は、実施例１および２にお
ける各実験例についての注水後の経過時間と硬化
挙動の関係を、また第３図は実施例３における各
実験例についての注水後の経過時間とスランプ
（cm）値との関係をそれぞれ示したものである。
Figures 1 and 2 show the relationship between the elapsed time after water injection and curing behavior for each experimental example in Examples 1 and 2, and Figure 3 shows the relationship between the curing behavior and the elapsed time after water injection for each experimental example in Example 3. It shows the relationship between time and slump (cm) value.
Claims (1)
金属炭酸塩0.05〜２重量部、クエン酸もしくはク
エン酸塩0.01〜0.5重量部、アルミナセメントも
しくはジエツトセメント0.5〜15重量部およびグ
ルコン酸もしくはグルコン酸塩0.01〜0.5.重量部
添加してなるセメント系凝結調節組成物。1. For 100 parts by weight of ordinary cement, 0.05 to 2 parts by weight of alkali metal carbonate, 0.01 to 0.5 parts by weight of citric acid or citrate, 0.5 to 15 parts by weight of alumina cement or diet cement, and gluconic acid or gluconate. A cementitious setting control composition containing 0.01 to 0.5 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15705084A JPS61155239A (en) | 1984-07-27 | 1984-07-27 | Cementitious set conditioning composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15705084A JPS61155239A (en) | 1984-07-27 | 1984-07-27 | Cementitious set conditioning composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61155239A JPS61155239A (en) | 1986-07-14 |
| JPH0476941B2 true JPH0476941B2 (en) | 1992-12-07 |
Family
ID=15641096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15705084A Granted JPS61155239A (en) | 1984-07-27 | 1984-07-27 | Cementitious set conditioning composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61155239A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63222055A (en) * | 1987-03-10 | 1988-09-14 | 三菱化学株式会社 | Manufacture of cement molded body |
| US4842649A (en) * | 1987-10-02 | 1989-06-27 | Pyrament, Inc. | Cement composition curable at low temperatures |
| DE4242107C1 (en) * | 1992-12-14 | 1994-06-01 | Heidelberger Zement Ag | Fast curing binder mixture and its use |
| US5916361A (en) * | 1993-10-12 | 1999-06-29 | Henry J. Molly & Associates, Inc. | Glass fiber reinforced cement composites |
| US5629048A (en) * | 1994-09-20 | 1997-05-13 | Sandoz Ltd. | Rapid setting cementitious compositions and method |
| JP4535723B2 (en) * | 2003-12-26 | 2010-09-01 | 太平洋マテリアル株式会社 | Medium insert |
| JP4535724B2 (en) * | 2003-12-26 | 2010-09-01 | 太平洋マテリアル株式会社 | Low exothermic intermediate material |
| JP4583220B2 (en) * | 2005-03-30 | 2010-11-17 | 住友大阪セメント株式会社 | Method for improving fluidity of ultrafast hard concrete and fluidity improver for ultrafast concrete |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5181823A (en) * | 1975-01-14 | 1976-07-17 | Onoda Cement Co Ltd | KYUKOSEISEMENTONOSEISHITSUKAIZENHOHO |
| JPS52145429A (en) * | 1976-05-28 | 1977-12-03 | Sumitomo Cement Co | Method of improving cement |
| JPS5684357A (en) * | 1979-12-10 | 1981-07-09 | Kamakura Hiroshi | Flowable adhesive cement composition |
| JPS58176156A (en) * | 1982-04-09 | 1983-10-15 | 日本板硝子株式会社 | Mixed cementitious material for grc manufacture |
| JPS5964551A (en) * | 1982-10-05 | 1984-04-12 | 三星化学合資会社 | Cement composition |
-
1984
- 1984-07-27 JP JP15705084A patent/JPS61155239A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5181823A (en) * | 1975-01-14 | 1976-07-17 | Onoda Cement Co Ltd | KYUKOSEISEMENTONOSEISHITSUKAIZENHOHO |
| JPS52145429A (en) * | 1976-05-28 | 1977-12-03 | Sumitomo Cement Co | Method of improving cement |
| JPS5684357A (en) * | 1979-12-10 | 1981-07-09 | Kamakura Hiroshi | Flowable adhesive cement composition |
| JPS58176156A (en) * | 1982-04-09 | 1983-10-15 | 日本板硝子株式会社 | Mixed cementitious material for grc manufacture |
| JPS5964551A (en) * | 1982-10-05 | 1984-04-12 | 三星化学合資会社 | Cement composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61155239A (en) | 1986-07-14 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |