Influence Of The Properties Of Fines in Mechanism Sand On The Performance Of Concrete

1, the effect of fine powder on the performance of freshly mixed concrete

Through the use of different fine powder to carry out concrete construction, analyze its compatibility with cement and water reducing agent to the situation can be seen, the fine powder in the mineral admixture used in the mixing, can have to improve the compatibility of cement and water reducing agent, improve the fluidity of cement and concrete strength. Although there is a small increase in the fluidity of the cement paste, the stone dust in the fines does not have a significant effect on the strength of the concrete. And from the density of the fine powder to analyze, the fine powder fineness is low will be more processing compared to the washed fine powder.

2, the impact of fine powder characteristics on hardened concrete when fine powder

MBV is increasing when the water consumption of concrete will be effectively enhanced, which will invariably increase the cost of concrete configuration, and the performance of concrete itself will continue to decline. From the effect of its use in a fixed slump, the performance of the fines will have a direct impact on the shrinkage of concrete, the need to increase the amount of water in order to strengthen the effect of its use to ensure. Moreover, this kind of MBV fine powder will produce adverse effects on the construction of concrete, and it is necessary for the engineering department to strictly control the mud content, in order to eliminate its adverse effects on the compressive strength and dry shrinkage of concrete as far as possible, and to realize the effective guarantee of the quality of concrete.