对泰州地区粉土用石灰和水玻璃进行室内改良试验,研究了不同掺量石灰+水玻璃(1%石灰+3%水玻璃、3%石灰+1%水玻璃、3%石灰+3%水玻璃)改良粉土的改良效果,得出以下结论:石灰+水玻璃对粉土有良好的改良效果,改良土的CBR值较素土有很大的提高;改良土的CBR值与无侧限抗压强度均随着养护时间和压实度的增加明显提高;粉土中掺入3%石灰+3%水玻璃后改良效果最佳,掺入1%石灰+3%水玻璃后能快速提高粉土的早期强度。试验成果可以指导实际工程依据强度要求确定不同的石灰+水玻璃掺量。

An indoor test of improving silt in Taizhou by using lime and sodium silicate was carried out, and the improvement effects of different mix proportions of lime and sodium silicate were studied: 1% lime and 3% sodium silicate, 3% lime and 1% sodium silicate, 3% of lime and 3% sodium silicate, respectively. Results revealed that, 1) lime and sodium silicate could effectively improve silt’s properties, with obvious increase of CBR value in comparison with plain soil; 2) the CBR value and unconfined compressive strength of improved soil obviously increased with the increase of curing age and compaction degree; 3) 1% lime and 3% sodium silicate could achieve the best improvement effect, while 1% lime and 3% sodium silicate could rapidly improve the early strength of soil. The test results can be taken as reference for determining the blending proportions of lime and sodium silicate according to needed strength.