Oat straw,wool fibre,glutinous rice pulp and sodium methylsilicate were mixed into the raw soil from the southern foot of Yinshan Mountain in Inner Mongolia,and the composite modification of raw soil materials was carried out through orthogonal test,to study the influence of each modified material on the compressive strength and thermal conductivity of modified raw soil specimens under different dosage and to determine the optimal mixing ratios.The results show that the optimal mixing ratio of modified raw soil material with high compressive strength is as follows:the overall water content is 18％,the dosage of oat straw is 0.6％,the dosage of wool fibre is 0.6％,the dosage of glutinous rice pulp is 2％,and the dosage of sodium methyl silicate is 1.5％.The compressive strength was increased by 65.6％and the thermal conductivity was reduced by 8.0％compared with the plain soil test block.The optimal mixing ratio of low thermal conductivity type is 18％of overall moisture content,0.6％of oat straw,0.6％of wool fibre,2％of glutinous rice pulp and 0.7％of sodium methyl silicate.The compressive strength was increased by 50.5％and the thermal conductivity was reduced by 16.6％.
关键词
生土改性/正交试验/最优配合比/抗压强度/导热系数
Key words
raw soil modification/orthogonal test/optimal mix ratio/compressive strength/thermal conductivity
维普
万方数据