聚丙烯纤维EPS轻质混合土抗压强度试验研究

为了进一步提高聚丙烯纤维EPS轻质混合土的抗裂性能和抗压性能,将聚丙烯纤维、EPS、水泥按照不同比例掺加到粘土中制成试样,进行了室内无侧限抗压强度试验和三轴固结不排水试验。结果表明,EPS添加量是影响轻质混合土密度的最主要原因;轻质混合土的无侧限抗压强度随着EPS添加量的增加而降低,但随着水泥添加量的增加而显著提高;掺加一定量的聚丙烯纤维能有效提高无侧限抗压强度,当聚丙烯纤维添加量增加到一定量后强度增加缓慢,但能提高轻质混合土的残余强度,可改善轻质混合土的脆性破坏形式。

Experimental Study on Compressive Strength of Lightweight Soil Mixed with EPS by Polypropylene Fibers

In order to improve cracking resistance and compressive property of EPS lightweight polypropylene fiber mixed soil, polypropylene fiber, EPS, and cement are mixed in different proportions with clay to make specimen, and they are conducted to unconfined compressive strength indoor test. The result shows that the content of EPS is the main reason for affecting the density of light soil; the strength of the sample decreases with the increase of EPS content, and it increased sharply with the increase of cement; mixed polypropylene fiber addition can effectively improve the strength; as fiber ratio increases, the strength of mixture increases slowly, but the residual strength and the form of brittle failure of the specimen are improved.