1 The problem of the amount of water reducing agent
On the question of how to add a water reducing agent, the problem worth noting is that its dosage should be scientifically controlled.Condensate will use different types of cement, and the same type of water reducer will have different types.
In actual engineering construction, the problem of the amount of water reducing agent needs to be tested several times to obtain the best condition.
2 Water consumption problem
When preparing high-performance concrete, fine slag should be used, sometimes with a large amount of fly ash.
The thickness of the admixture has a certain influence on the water reducing agent. If the quality is not up to standard, the working performance of the concrete will be affected.If the adaptability of slag is better, but the proportion of the admixture should not be too large, if it is too large, bleeding is likely to occur.For fly ash, the quality should be strictly controlled, and it should be controlled to the second level or above. The fly ash above this level has a good effect on the water reducing agent.
3 problem of blending amount
In order to reduce the amount of cement, save costs, and improve the performance of concrete, a large amount of slag and fly ash must be incorporated in the preparation of concrete.In order to reduce the amount of cement, save costs, and improve the performance of concrete, a large amount of slag and fly ash must be incorporated in the preparation of concrete.
The fineness and quality of the admixture will affect the water reducing effect of the water reducing agent.It is worth noting that high performance concrete has high requirements for the fineness and quality of the admixture.When formulating high-performance concrete, the slag powder can effectively improve the performance of the concrete as a blending material. For the blending, a scientific amount is needed.
4 problem with aggregates
The quality of the aggregate is evaluated from various aspects, mainly including particle gradation, shape, surface structure, mud content, mud content, and harmful substance content.
These factors will affect the quality standards of aggregates, especially the amount of mud,The mud content should be less than 3%. If it exceeds this range, even if the water reducing agent is added, it will still not meet the standard.In addition, due to the different particle shape of the coarse aggregate, the water reducing effect of the water reducing agent is also greatly affected.As the surface of the needle material and the coarse aggregate become more and more, the fluidity of the concrete is lowered.If you want to improve the practical effect of concrete, it is not feasible to rely solely on water reducing agent. The optimization of concrete coordination is also very important.
How to use the water reducing agent to make the construction industry improve the comprehensive performance and economic benefits of commercial concrete is a topic worthy of attention.