基于响应面法的高原红土固化性能试验研究

Experimental of Consolidation Performance of Laterite in Plateau Based on RSM

为了提升高原红土固化后的性能,使其满足施工便道对材料的需求,本工作采用响应面法研究了固化剂、河沙、短切纤维对固化高原红土性能的影响。采用三因素三水平设计实验,在实验结果的基础上采用多目标优化法对固化高原红土的配合比进行了优化,为固化高原红土路面材料提供了科学的配合比设计方法。研究结果表明:固化剂掺量、河沙替代率和短切玄武岩纤维掺量对固化高原红土的性能均存在显著影响。固化高原红土路面材料的最优配合比为固化剂掺量20%、河沙替代率28.54%、短切玄武岩纤维掺量2%,此条件下,材料无侧限抗压强度达到8.57 MPa,水稳系数达到0.879。

In order to improve the properties of laterite in plateau after solidification and meet the needs of construction roads for materials,the response surface method was used to study the effects of curing agent,river sand and chopped fiber on the properties of laterite in plateau.The three factors and three levels design experiment is adopted to optimize the mix proportion of solidified laterite in plateau,which provides a scientific mix proportion design method for solidified laterite in plateau pavement materials.The results show that the content of curing agent,the replacement rate of river sand and the content of chopped basalt fiber have significant effects on the properties of solidified laterite in plateau.The optimal mix proportion of solidified laterite in plateau pavement materials is:20%of curing agent,28.54%of river sand replacement rate,and 2%of chopped basalt fiber.Under this condition,the unconfined compressive strength of the materials reaches 8.57MPa,and the water stability coefficient reaches 0.879.