In the process of cement production, the use of grinding AIDS has a significant effect on improving the efficiency and yield of the mill. However, when the grinding aid contains nano water reducing agent, it may cause the concrete collapse to increase, which brings great trouble to the construction unit. This problem needs to be solved urgently to ensure concrete quality and engineering safety.
To solve this problem, the use of polycarboxylic acid admixtures has become an effective means of adjustment. First of all, we need to understand the cause of concrete collapse caused by grinding AIDS. The nano superplasticizer will accelerate the hydration reaction of cement, which will increase the water demand and increase the slump loss. When the grinding aid containing nano powder is used in the field, if the conflict with the polycarboxylic acid mother liquor, the loss will be further increased.
In order to deal with this problem, we can make adjustments from the two aspects of synthesis and compounding. In the aspect of synthesis, the use of anti-mud mother liquor is an effective method. The anti-mud mother liquor can improve the mud resistance of concrete and reduce the water requirement, thus reducing the collapse phenomenon. At the same time, increasing the ratio of acid to ether can increase the water reduction rate and further improve the working performance of concrete.
In terms of compounding, the selection of large dispersive raw materials is the key. For example, raw materials such as sodium gluconate, K12, sodium metabisulfite, sodium bisulfite and dispersible emulsion powder have good dispersion properties, which can help improve the fluidity and slump retention of concrete. By adjusting the proportion of these raw materials reasonably, the performance of concrete can be further optimized and the risk of collapse can be reduced.
In short, polycarboxylic acid admixtures can be used to adjust the concrete collapse caused by grinding AIDS. By synthesizing the anti-mud mother liquor and increasing the ratio of acid to ether, as well as the selection of dispersed raw materials in the compounding, we can effectively improve the performance of concrete and ensure the quality and safety of the project.
