陕南生土材料改性试验研究

Experimental Research on Raw-Soil Material Modification in South Shaanxi

传统的生土材料存在强度较低、耐水性差、体积稳定性差等缺陷,限制了生土材料的应用,为了探索陕南山区生土建筑合适的墙体改性材料,首先,对目前常见的生土改性材料进行归纳分析,认为天然可再生材料有应用潜能,其次,对素土,3%稻草、3%淀粉、7%淀粉、3%生石灰和5%熟石灰改性生土进行了抗压试验、直接剪切试验等,试验表明稻草和淀粉可用于山区生土建筑的改性,为陕南山区生土材料的改性研究提供科学参考。

The traditional raw-soil material has fatal flaws,such as poor compressive strength and low water resistance and volume stability,which restricted its application seriously.In order to explore the proper modified materials for the raw-soil building in mountainous areas of South Shaanxi,the raw-soil modified materials now being used commonly are analyzed effectively at first,and the natural regenerated resource is thought as an ideal modification material which has a promising application prospect.Then experiments on compressive properties and direct shear properties of raw-soil,3% straw soil,3% starch soil,7% starch soil,3% quicklime soil and 5% slaked lime soil are carried out,and the tests show straw and starch are applicable to modify raw-soil in mountainous areas,which provides the reference for the raw-soil materials modification in mountainous areas of South Shaanxi.