黄土路基掺入生石灰的CBR试验分析

随着高等级公路的建设和发展，我国现行规范已将CBR值作为公路路床土最小强度要求的依据。本试验以罗定高速公路定西段黄土为研究对象，分析不同浸水时间、击实次数、掺灰量与CBR值的关系。试验结果表明；在黄土中掺入生石灰可以显著改善黄土的强度和水稳性，能满足规范中路床土最小强度的要求。得出定西地区黄土路基最佳灰剂量为3%，最佳压实度为97%。

A CBR Experimental Analysis on Mixing Quick Lime into Loess Roadbed

A value of CBR was Regarded as a basis of minimum intensity to measuring roadbed loess in present criterion along with the construction and development of highway. This test, as a case study of loess in Dingxi section of LuoDing highway, analyzes the relation between the different soaking time, striking frequency, quantity of mixing quick lime and CBR. It concludes that mixing quick lime into loess not only can greatly improve the intensity of the lime and the stability of the water, but also can satisfy the minimum demands to control intensity. The result of test also represents that the best lime dosage of loess roadbed in Dingxi is 3% and the best extrusion is 97%.