石粉掺量对混凝土力学性能及耐久性的影响

Influence of Mass Fractions of Limestone Powder on Mechanical Property and Durability of Concrete

通过研究外掺和内掺不同质量分数的石粉对混凝土工作性能、强度、弹性模量、干缩、渗透系数和抗冻性能的影响,确定了石粉的最佳掺量及掺入方式,并对其进行了机理分析.结果表明,当混凝土中外掺15%～20%（质量分数）石粉时,混凝土的力学性能及耐久性最好.

A series of experiments were carried out to investigate the effect of stone powder content and different way of mixture on the workability, different age of compressive strength, modulus of elasticity, drying shrinkage, coefficient of permeability as well as freezing-thawing resistance of concrete. The mechanisms of action, the best mass fractions and optimal way of stone powder were analyzed. The studies show that the performance of concrete is the best when the stone power content is between 15% and 20%.