synopsis
Alkali-free quick-setting agent liquid
A kind of alkali-free concrete quick-setting agent and its processing method, containing 30~65 parts of aluminum sulfate, 2~8 parts of organic amine, 1~5 parts of suspending agent and 20~35 parts of water by weight, grinding and processing of aluminum sulfate, passing through 80~300 mesh sieve, and adding into the mixing solution of organic amine, suspending agent and water of the said weight parts, and dissolving it under the condition of 40~100ºC, and at the same time, mixing it strongly with high speed stirrer for 10 ~ 30 minutes, mixing uniformly and then emulsified with an emulsifier for 5 ~ 10 minutes, that is, to obtain the desired alkali-free liquid quick-setting agent; aluminum sulfate and organic amines grinding and processing, through 80 ~ 300 mesh sieve, that is, to obtain the desired alkali-free dry powder quick-setting agent. The alkali-free quick-setting agent of the present invention has no alkali, no chlorine, no irritating odor, good adhesion, low rebound, high late strength preservation rate, and high impermeability level, and the addition of the alkali-free quick-setting agent of the present invention to shotcrete can bring about a better working environment and a considerable market value.
A non-alkali quick-setting agent, characterized in that: the main component is aluminum sulfate and organic amine, aluminum sulfate: organic amine weight ratio of 30-65:2-8.
performances
1,Appearance:Slightly yellow uniform liquid.
2, features: completely environmentally friendly, alkali-free and chlorine-free, some indicators exceed the requirements of JC477 - 2005 "standard", the solidification time can be adjusted arbitrarily by the amount of admixture, the use of safe and convenient.
3, the scope of use: mainly used in mining shafts and alleys, railroad tunnels, diversion culverts, underground engineering and other shotcrete construction and repair works, to speed up the progress of the project, improve the efficiency of work.
Speed up the progress of the project, improve the efficiency and quality of the project.
4, the use of methods and precautions:
a. Before use, it is necessary to do adaptability test on the cement and other materials used in construction to determine the best mixing amount. The reference amount is 3-6% of the cement quality, the water-cement ratio is 1:0.4-0.45, and the gray-sand ratio is 1:2-3.
b. During construction, the water-cement ratio should be strictly controlled. If the water-cement ratio is too large, it will prolong the solidification time and affect the use effect.
c. The mixed product should be deducted from the corresponding amount of water mixing.
d. The concrete after construction should be strengthened by splashing water to improve the strength.
5,Main technical performance index requirements and test results:
Function
The product with good adaptability to the cement, condense sclerosis is fast, the initial setting time is less than 3minutes ,the final setting time is less than 8 minutes. 1 day compressive strength is 7Mpa. 28 days compressive strength ratio is not less than 75%, conform to the index requirements of " JC477-2005 accelerating agent for shotcrete "
in the use accelerating agent ,the sprayed concrete strength loss is small ,rebound rate is low ,a jet thickness is high , it is helpful to improve the quality and durability of sprayed concrete engineering ,has obvious technical and economic benefits .
Adaptation
This product is suitable for spraying concrete construction and leakage plugging of underground projects such as mine engineering, coal mine, shaft engineering, mine room engineering, highway and railroad, traffic tunnel engineering, spraying anchor support concrete, urban construction, national defense, water conservancy, etc., rapid construction of ground cement concrete and concrete emergency rescue and repair and reinforcement projects.
Usage and attention
(1) Dosage 3-6%, usually is 5%, 6%.
(2) In the use of alkaline liquid quick setting agent please pay attention to the adaption and freshness of the cement, ensure the dosage according to the environment and experience, and keep the temperature between 5-35 degree
Pay attention to the water cement ratio should be 0.4-0.45. it shouldn't be too large ,with no flowing ejecta, no spot , uniform color is appropriate
When using should strictly note protection of the labor
Storage
Stored in Blue plastic bucket, one bucket is about 300kg, we also have tons of barrels
The shelf life is half a year, if the bottom have precipitate please shake it uniformity. You can still use if there is no influence to the using effect.
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