黄原胶和棕榈丝纤维对上海黏土抗压强度的影响

为改良上海黏土强度低、易变形的工程特性,将黄原胶和棕榈丝纤维以不同质量加筋率加入上海黏土并在不同养护龄期下养护,通过无侧限抗压强度试验探究黄原胶和棕榈丝纤维对上海黏土抗压强度的影响。试验结果表明:与素土相比,黄原胶能够提高土体抗压强度,但也增加了土体的脆性;棕榈丝纤维能提高土体抗压强度,也能提高土体的延性;同时添加黄原胶和棕榈丝纤维,土体的抗压强度和延性均有明显提高;抗压强度最适宜加筋率为1. 5%黄原胶和0. 75%棕榈丝纤维。

Effect of xanthan gum and palm silk fiber on compressive strength of Shanghai clay

In order to improve the low strength and easy deformation engineering properties of Shanghai clay, xanthan gum and palm silk fiber were added at different mass reinforcement ratios and cured the clay under different curing ages. Through unconfined compressive strength test, we investigated the impacts of xanthan gum and palm silk fiber on compressive strength of Shanghai clay. The results indicated that compared with plain soil, xanthan gum can improve the compressive strength of soil, but also increase the brittleness of soil; palm fiber can improve the compressive strength of soil and improve the ductility of soil. Adding both xanthan gum and palm silk fiber, the compressive strength and ductility of the soil obviously improved. The most suitable reinforcement ratio for compressive strength of soil is 1.5% xanthan gum and 0.75% palm silk fiber.