Thickening agents for self compacting concrete, their preparation and application of the self-compacting concrete thickener
2014
The present invention discloses a method for the preparation of self-compacting concrete thickener, comprising the steps of: (1) weighing scale 2-acrylamido-2-methylpropane sulfonic acid, formulated in aqueous solutions, adjusting the pH to 6.5 to 7.0; (2) was added with stirring the prepared concentration of 25% to 35% acrylamide monomer solution, stir poured into the flask, water bath through nitrogen; (3) when the reaction when the temperature rose to 30 ~ 40 ℃, the initiator is added dropwise, incubated 40 ℃, the reaction was stirred for about 1.5 to 2 hours, the reaction was stopped when the nitrogen product as a viscous liquid, temperature curing period of time, namely to obtain a white transparent gel thickener. The present invention is obtained by formulating a thickener for self-compacting concrete, its good water solubility, good thickening effect, can effectively increase the viscosity of the plastic self-compacting concrete, self-compacting concrete to solve the problem of bleeding and segregation.
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