超细矿物掺合料混凝土抗盐冻性能的试验研究

Experimental study on salt-frost resistance of superfine mineral admixture concrete

试验研究了盐冻条件下超细矿物掺合料以及水灰比对混凝土的质量损失率、相对动弹性模量以及其表面剥蚀的影响。试验结果表明:水灰比对混凝土质量损失率有很重要的影响,水灰比小于0.4时混凝土的质量损失率有明显下降;单独掺加超细粉煤灰时混凝土的质量损失率以及动弹性模量损失率并未减小,但当复掺超细粉煤灰和矿粉时,混凝土质量损失率以及动弹性模量损失率有显著的下降;混凝土试件随着盐冻次数的增加,其表面剥蚀越来越严重。

Admixtures and water-cement ratio on experimental study of the quality of the mass loss rate and relative dynamic elastic modulus and the influence of the surface erosion.The test results show that water cement ratio on mass loss rate of concrete has very impor- tant influence,when water cement ratio is less than 0.4 ,mass loss rate has decreased obviously.Separate mixed with superfine fly ash as the mass loss rate and dynamic elastic modulus of concrete does not reduce.But when mixed superfine fly ash and mineral powder,mass loss rate and dynamic elastic modulus of concrete fell significantly.With the increase of number of salt-frost, the surface erosion of concrete specimen is more and more serious.