YAO Zheng-yi,WANG Tao,HAN Zhi-wen,et al.Field Tests on Consolidation Effect of Three Sand Stabilizers[J].Research of Soil and Water Conservation,2008,15(02):66-68.
3种固沙剂固沙能力的野外试验研究
- Title:
- Field Tests on Consolidation Effect of Three Sand Stabilizers
- Keywords:
- sand stabilizers; sand consolidation effect; field test
- 分类号:
- X171;S157
- 摘要:
- 以国内种化学固沙剂为研究对象,对其不同用量下形成的结皮渗透性能、结皮厚度,抗风蚀能力、力学强度进行了野外实验观测研究.结果表明,DST、改性聚醋酸乙烯的渗透性较好,人渗深度分别可达到4.0～5.0 mm和3.2～5.0 mm,星火A渗透性差.在种固沙剂中,DST形成的结皮厚度大,可达到10～13 mm,抗压强度也最大,为1.22～2.27 MPa.改性聚醋酸乙烯和星火A形成的结皮厚度小.只有DST结皮的1/4～1/5.改性聚醋酸乙烯结皮在用量为150 g/m2时抗压强度为0.98 MPa,中小用量强度较低.星火A种用量结皮强度都弱.野外实验表明,DST无论是耐候性和抗紫外线辐射性能较好,具有较强的抗风蚀能力,改性聚醋酸乙烯的耐候性和抗紫外线辐射性能较差.相比之下,DST是一种优良的固沙剂,用量还可以降低,以降低成本.
- Abstract:
- Three types of sand stabilizers were used for field tests on loose sand surface in Shapotou.Each sand stabilizer was conducted in three concentrations.The observed contents include penetration depth,crust thickness,surface hardness,compressive strength and erodibility.Based on the test results,PAE(Polyvinyl acetate emulsion) and DST have good permeability and penetration depth is 4.0～5.0 mm and 3.2～5.0 mm respectively.The Xinghuo A has poor permeability.The crust thickness of DST is 10～13 mm and is the thickest among three sand stabilizers.The crust thickness of PAE and the Xinghuo A only is 1/4～1/5 of DST’s.Compressive strength of DST crust can reach 1.22～2.27 MPa and can bear a human being weight.Compressive strength of the Xinghuo A crust is the lowest among three sand stabilizers.Field tests show that DST is the most appropriate material for fixing sand drift because DST has the wider range of temperature tolerance,higher aging and natural weathering resistance and sand-flow resistance,and the test also showed that the dosage of DST can be reduced and decrease the cost.
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备注/Memo
收稿日期:2007-5-15;改回日期:。
基金项目:国家自然科学基金项目(40472144)
作者简介:姚正毅(1969- ),男,博士,副研究员,主要从事风沙工程与沙漠化研究.E-mail:yaozy@lzb.ac.cn