The optimal solution for reducing concrete slump loss

The technical measures for controlling concrete slump loss are multifaceted and multifaceted. Targeted measures should be taken based on the causes of concrete slump loss in order to achieve immediate results. The following measures can be taken.

When the loss of slump of commercial concrete is too fast and cannot be pumped due to unpredictable circumstances, the method of adding pumping agent can be adopted to solve it.

2. The finer the cement particles, the more water is required. An increase in water demand will inevitably exacerbate the loss of concrete slump. To alleviate slump loss, it is necessary to determine the optimal dosage of pumping agent through the adaptability test of pumping agent.

3. It is necessary to optimize the raw materials used for pumping concrete. Cement, admixtures, aggregates, pumping agents, etc. must meet the quality requirements of the standards, and have an understanding of their quality and performance. The frequency of retesting should be increased, and the manufacturers used should be relatively stable. The concrete mix proportion should be determined through experiments and continuously optimized and summarized through production practice to achieve the optimal design of the concrete mix proportion, the best aggregate gradation, and the minimum mud content, The slump loss is minimal.

4. Adding air entraining agent or air entraining retarder to concrete can effectively reduce the loss of concrete slump, and the amount of addition is determined through experiments. After the addition of air entraining agent, a large number of fine and dense bubbles are generated, which can isolate a large number of dispersed cement particles. This is an effective way to reduce the secondary adsorption of cement and reduce the loss of concrete slump. The appropriate air content of concrete is also an effective way to improve the workability, cohesion, water retention, and pumpability of concrete.

During the hot summer season, experiments can increase the dosage of admixtures and effectively reduce the loss of concrete slump.

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