Influence of fiber and cement addition on behavior of sandy soil
Influence of fiber and cement addition on behavior of sandy soil
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DOI：
10.1061/(asce)1090-0241(1998)124:12(1211
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发表时间：
1998-12-01
影响因子：
3.9
通讯作者：
Ulbrich, LA
中科院分区：
文献类型：
--
作者：
Consoli, NC;Prietto, PDM;Ulbrich, LA
通过三轴压缩试验，研究了随机分布的纤维和水泥对桑迪荷载响应的影响。制备水泥试样，水泥含量为干土重量的0%和1%，并养护7天。纤维长度为12.8 mm，含量为干土壤-水泥混合物重量的0%和3%。试验结果表明，加入水泥的土壤增加刚度，脆性和峰值强度。纤维增强提高了峰值强度和残余三轴强度，降低了刚度，并改变了水泥土的脆性行为更延性。纤维掺入对非水泥土三轴峰值强度的提高更为有效。然而，当纤维加入到水泥土中时，残余强度的增加更有效。峰值强度包络线表明，由于纤维的加入，摩擦角从35度增加到46度。纤维添加量对粘聚力截距的影响很小，基本上是胶结作用的函数。
Triaxial compression tests were carried out to evaluate the effect of randomly distributed fiber reinforcement and cement inclusion on the response of a sandy soil to load. Cemented specimens were prepared with cement contents of 0% and 1% by weight of dry soil and cured for seven days. Fiber length was of 12.8 mm, in the contents of 0% and 3% by weight of dry soil-cement mixture. Test results indicated that the addition of cement to soil increases stiffness, brittleness, and peak strength. The fiber reinforcement increases both the peak and residual triaxial strength, decreases stiffness, and changes the cemented soil's brittle behavior to a more ductile one. The triaxial peak strength increase due to fiber inclusion is more effective for uncemented soil. However, the increase in residual strength is more efficacious when fiber is added to cemented soil. Peak strength envelopes indicate that the friction angle is increased from 35 degrees to 46 degrees as a result of fiber inclusion. The cohesion intercept is affected slightly by fiber addition, being basically a function of cementation.