水泥稳定风积沙基层抗剪强度试验研究

Grassroots-level Shear Strength Experimental Study of Aeolian Sand with Cement

近年来,内蒙古锡林浩特地区沙漠化程度逐年上升,当地的风积沙储量很大,筑路取料方便,运输经济;而风积沙为不良的筑路材料,若能够解决风积沙作为基层筑路材料使用问题,使其强度和稳定性达到基层建设标准的规范使用要求,不失为修筑沙漠地区公路材料提供了一种新的选择。基于此,在内蒙古地区风积沙特性研究的基础上,对其掺入了一定量的水泥,研究探讨了水泥稳定风积沙作为道路施工的基层材料的抗剪强度,得出不同水泥掺量对风积沙基层抗剪强度影响因素以及作用机理。通过试验得出,水泥稳定风积沙的抗剪强度会随着水泥掺量的改变发生较大变化,在一定程度上对沙漠地区风积沙作为筑路材料施工提供了些许参考价值。

In recent years, the desertification degree in Xilinhot region of Inner Mongolia is rising year by year, and quantity of the local aeolian sand reserves is so large that it has been used as the road-building materials. More-over, the transportation is so convenient and economic. However, the aeolian sands are not good road-building ma-terials. If the usage problem of aeolian sand as road materials at the grass-roots level could be solved, and its strength and stability at the grassroots level could meet the construction specification requirements, a new choice of material will be made for building a desert highway. Based on this, the experimental study by adding a certain amount of cement was illustrated into the aeolian sand based on the study of the characteristics of aeolian sand in the Inner Mongolia region and studies and researches the shear strength of aeolian sand and cement as the grassro-ots-level materials of the road-building and also concludes the affective factors and mechanism of different amount of cement to the grassroots-level shear strength of aeolian sand. According to the experiments, the conclusion was draw that the shear strength of the aeolian sand with cement will change a lot as the change of the dosage of cement. Therefore, some reference for the road building materials （ aeolian sand） in the desert area to some extent was pro-vided.