钢渣微粉与粉煤灰复合效应对混凝土力学性能与耐盐冻性的影响

Influences of Combined Effects of Steel Slag Powder and Fly Ash on Mechanical Properties and Salt Frost Resistance of Concrete

研究了钢渣微粉及其与粉煤灰复合效应对混凝土力学性能与耐盐冻性能的影响。研究结果表明:随着钢渣微粉掺量的增加,抗折强度逐渐下降;抗压强度仅在用量为5%时,有近0.5 MPa的提高。经受冻融循环后,抗折强度、抗压强度以及动弹性模量分别在钢渣微粉掺量为10%、15%时,达到了最高值。在钢渣微粉用量为5%的基础上,粉煤灰用量在10%时,抗折强度、抗压强度以及动弹性模量均达到了最高值。钢渣微粉与粉煤灰复合效应有助于改善混凝土的力学性能与耐盐冻性能。

This paper studied the influences of combined effects of the steel slag powder and fly ash on the mechanical properties and salt frost resistance of concrete.The results showed that,with the increase of the steel slag powder content,the flexural strength gradually decreased.The compressive strength increased by about 0.5 MPa when the content of steel slag powder was 5%.After the freezing-thawing cycle,the flexural strength,compressive strength and dynamic elastic modulus reached the maximum when the content of steel slag powder was 10%and 15%respectively.On the basis of steel slag powder content of 5%and fly ash content of 10%,the flexural strength,compressive strength and dynamic elastic modulus all reached the maximum value.It can be concluded that the combined effects of the steel slag powder and fly ash can improve the mechanical properties and salt frost resistance of concrete.