硅微粉固化盐渍土强度试验研究

文章以双洮公路沿线盐渍土为研究对象,利用硅微粉固化改良盐渍土,研究其无侧限抗压强度的变化规律。在盐渍土中分别掺入2%、4%、6%、8%的硅微粉进行固化改良,调整试样的养护龄期,通过无侧限抗压试验,研究了不同试样的无侧限抗压强度和应力应变曲线。试验结果表明,硅微粉固化盐渍土存在最优掺量,随着养护龄期增长,最优掺量有小幅增加,龄期为56d的试样,硅微粉掺量为8%时,强度为0.751MPa,较素土试样强度增加了155%。

In this paper,the salinized soil along the Shuangtao highway is taken as the research object,and the change rule of unconfined compressive strength of the salinized soil is studied.Adding 2%,4%,6%and 8%silica powder to the salinized soil for curing,adjusting the curing age of the samples,and through the unconfined compression test,the unconfined compressive strength and stress-strain curves of different samples were studied.The test results show that there is an optimal content of silica fume in solidified saline soil.With the increase of curing age,the optimal content of silica fume increases slightly.The strength of the sample with the age of 56d is 0.751mpa when the content of silica fume is 8%,which is 155%higher than that of the sample with plain soil.