岩土力学Issue(z2)：105-109,5.
绢云母片岩粗粒料改性试验研究
Modified test research of sericite schist coarse aggregates
摘要
Abstract
The surface vibration compaction test, indoor heavy compaction test, interior California bearing ratio(CBR) test and modulus of resilience test have been carried out on sericite schist coarse aggregates and four modified soils, because the sericite schist belong to the soft rock, strength low, which is easy to make road collapse and pavement cracking when it as subgrade filling material. Test results shows that it is a big difference in the maximum dry density of sericite schist coarse aggregates by using heavy compaction test in contrast to the surface vibration compaction test. The results of maximum dry density is 2.01 g/cm3 by using heavy compaction test; but another is 1.92 g/cm3. The main reason is that due to particle breakage in sericite schist. The effects of the change of the optimum moisture content is not obvious for sericite schist coarse aggregates, as well as for four modified soils, which is beneficial to compaction. The modulus of resilience of sericite schist coarse aggregates is low, less than 32 MPa. However the modulus of resilience of modified soil have been remarkable improved, up to 50 MPa above all. The CBR both only have 3.7 when blend it with 20%red sandstone or 20%clay. But the CBR ascends obviously when to mix it with 3%or 5%cement. Sericit schist after chemical modification by adding 3%, 5%of cement can be used in the embank kment of highway 94 zone and 96 zone.关键词
绢云母片岩/CBR试验/回弹模量/改性土Key words
sericite schist/california bearing ratio(CBR) test/modulus of resilience/modified soils分类
建筑与水利引用本文复制引用
秦尚林,杨兰强,陈荣辉,熊署丹..绢云母片岩粗粒料改性试验研究[J].岩土力学,2013,(z2):105-109,5.基金项目
国家自然科学基金资助（No.51079142）；湖北省谷城至竹溪高速公路科技项目资助（GZL-KJ-02-01）。 （）
