Concrete Collapse - High Alkali Cement

In the construction industry, the collapse of high alkali cement has been concerned. When the alkali content in cement is too high, it will lead to the increase of hydration heat water demand, which will affect the strength and durability of concrete. This problem not only brings great trouble to the construction unit, but also may seriously affect the quality of the project.

The compatibility between high alkali cement and water reducing agent is poor, which is also an important reason for the collapse problem. In order to solve this problem, we can start from two aspects: synthesis and recombination.

In the aspect of synthesis, it is an effective method to add mud resistant mother liquor and slow release mother liquor. The anti-mud mother liquor can improve the compressive strength of cement and reduce the water requirement, thus reducing the collapse phenomenon. The slow-release mother liquor can delay the hydration reaction speed, reduce the hydration heat, and further improve the working performance of concrete.

In terms of compounding, adding acid retarder is a good choice. Acid retarder can react with alkaline substances in high-alkali cement to reduce the heat rate of hydration, thus improving the fluidity and slump retention of concrete. At the same time, acid retarder can also improve the late strength of concrete and enhance the durability of concrete.

It should be noted that solving the problem of high-alkali cement collapse is not an overnight thing. In the construction process, we need to pay close attention to the quality fluctuations of raw materials, and timely adjust the mix ratio and admixture dosage. In addition, strengthening concrete maintenance is also an important link to prevent collapse. Through comprehensive policies, we can effectively deal with the crisis of high-alkali cement collapse and ensure the quality and safety of the project.