纤维素纤维和石灰粉对上海黏土抗压强度的影响

为改良上海黏土强度低、易变形的特性,将纤维素纤维和石灰粉以不同的质量加筋率加入到上海黏土中并在不同养护龄期下养护,然后对试样进行无侧限抗压强度试验,来探究纤维素纤维和石灰粉对上海黏土抗压强度的影响。试验结果表明:石灰粉能够有效的提高上海黏土的抗压强度,同时也提高了土体的脆性;纤维素纤维对提高黏土抗压强度效果不明显,但提高了土体的延性;同时掺加纤维素纤维石灰粉时,土的抗压强度显著提高,土的脆性降低,延性增加;抗压强度最适宜的加筋率为0.8%纤维素纤维和10%石灰粉。

Influence of cellulose fiber and lime powder on compressive strength of cohesive soil in Shanghai

Inorder to overturn low strength and high deformation characteristics of Shanghai clay, the paper mixed cellulose fiber and lime powder into Shanghai clay with different weight reinforcement ratios, and maintained the clay under different curing age. Through unconfined compressive strength test,it investigated the impacts of cellulose fiber and lime powder on compressive strength of Shanghai clay. The result indicated that lime powder can effectively improve the compressive strength of Shanghai clay as well as soil residual strength;cellulose fiber has no obvious impact on soil compressive strength, but can obviously improve the ductility of soil; when both cellulose fiber and lime powder are mixed into the clay,the compressive strength and ductility of the soil have been enhanced and its brittleness has been reduced; the most suitable reinforcement ratio for compressive strength of soil is 0.8 percent of cellulose fiber and 10 percent of lime powder.