摘要
红粘土和膨胀土均具有胀缩性、裂隙性等类似性质,属特殊土,用做路基填料时需符合现行规范要求。击实试验和CBR试验结果表明,当素土不能满足路基填筑要求时,石灰改性可改善土体胀缩性和承载能力指标。分析试验数据发现,填筑含水率宜控制在最佳含水率3.0%范围内,施工中需采取合理的搅拌和检测措施,以保证红粘土和膨胀土石灰改性后的路基处置效果。
Laterite soil and expansive soil, which belong to special soil, both perform the swell-shrinking and fracture behaviors. It must fit the code for subgrade filling. Through the compaction and CBR test, lime modification may improve the swell-shrinking and bearing index. From the experimental data, filling moisture content should be 3.0% more than optimum moisture content. The proper mix and detection methods must be used to ensure the subgrade disposition quality of lime exoansive soil and lime laterite.
出处
《建筑技术》
2012年第9期830-833,共4页
Architecture Technology
关键词
红粘土
膨胀土
胀缩性
石灰改性
laterite
expansive soil
swell-shrinking property
lime modification
