石灰与水泥改性花岗岩残积土耐久性的对比评价

Comparative Evaluation of Durability of Granite Residual Soil Modified by Lime and Cement

花岗岩残积土粘聚力小,水稳定性差,遇水易崩解,应用时需进行土体改性。其中在土体中掺入水泥或石灰是最常用的化学改性方式。展开室内试验,分别将石灰及水泥掺入花岗岩残积土进行土体改性,从CBR强度、崩解特性和水稳性三个方面对比评价石灰与水泥改性花岗岩残积土耐久性。结果表明,在最佳掺加量下,水泥改性后的各项指标基本均优于石灰改性,水泥改性花岗岩残积土的耐久性更优。

Granite residual soil has little cohesive force and poor water stability. It is easy to disintegrate in water, and soil modification is needed in application. The incorporation of cement or lime in the soil is the most commonly used chemical modification. The lime and cement were mixed into granite residual soil for soil modification, and the durability of lime and cement modified granite residual soil was evaluated from CBR strength, disintegration characteristics and water stability. The results show that under the optimal dosage, the indexes of cement modification are better than lime modification, and the durability of cement-modified granite residual soil is better.