基于生物炭改良的水泥固化土强度试验研究

为明确生物炭的添加对固化高含水率疏浚泥强度的影响,对含生物炭的固化高含水率疏浚泥开展了一系列的无侧限抗压试验,探讨了不同养护龄期下生物炭添加对固化高含水率疏浚泥强度规律的影响。试验结果表明:和不含生物炭的固化疏浚泥相比,相同养护龄期下生物炭的添加将引起固化疏浚泥无侧限抗压强度的增加,且增加幅度随生物炭掺量的增加而增大。此外,随着养护龄期的增大,生物炭添加引起固化疏浚泥强度性状的改变幅度也是逐渐增大的。最终,固化疏浚泥的破坏应变表现出增加的变化趋势,含生物炭的水泥固化土的破坏应变比不含生物炭的水泥固化土更大,破坏形态更明显。

Experimental Study on the Strength of Cement-solidified Soil Based on Biochar Improvement

In order to clarify the effect of the addition of biochar on the strength of the solidified dredged mud with high moisture content, a series of unconfined compressive tests were carried out on the solidified dredged mud with high moisture content containing biochar, and the influence of the addition of biochar on the strength law of the solidified dredged mud with high moisture content under different curing ages was discussed. The results show that compared with the solidified dredged mud without biochar, the addition of biochar at the same curing age will increase the unconfined compressive strength of solidified dredged mud, and the increase range will increase with the increase of the biochar content. In addition, with the increase of curing age, the variation range of the strength properties of solidified dredged mud caused by the addition of biochar also gradually increased. Finally, the failure strain of solidified dredged mud increased with the biochar, and the failure strain of cement-solidified soil containing biochar was larger and the failure pattern was more obvious than that of cement-solidified soil without biochar.