The Curing Performance Test of HEC Curing Agent on the Solar Greenhouse Gobi Soil Wall

【Objective】 The project aims to test the solidification properties of Gobi soil wall in three typical solar greenhouses in Xinjiang and analyze the mechanical properties of Gobi soil before and after solidification and the change rule of strength after sulfate erosion in the hope of providing a reliable theoretical basis for the wall solidification scheme of non-cultivated land in Xinjiang. 【Method】 According to the test requirements of "Standard of Geotechnical Test method" GB 50123-1999, "soil Mechanics experiment" and "soil Test procedure" SL 237-1999, particle analysis test and compaction test were used to determine particle gradation, classification and compaction performance of soil. The physical properties of Gobi soil before solidification were studied. The compressive strength of the cured soil and the strength after sulfate erosion were further measured. 【Result】 (1) The soil samples of three kinds of non-cultivated Gobi soil were all round boulders. According to the characteristic grain diameter, the non-uniform coefficient Cu and the curvature coefficient Cc of soil sample showed that the grain composition of No.2 soil sample was the best, followed by No.3 soil sample, the worst was No.1 soil sample. (2) Compared with undisturbed soil, the maximum dry density ρd and the optimal moisture content wop of soil No.1 increased significantly with the addition of 15% curing master batch, which were 0.046% and 0.017% respectively. (3) With the curing agent content increased and the more cementing material, the denser of curing soil, the greater the compressive strength of Gobi soil. (4) During a 90-day erosion test, with the increasing erosion period the compressive strength of curing soil was greater. 【Conclusion】 HEC curing agent commonly have a significant curing effect on Xinjiang commonly used solar greenhouse wall materials. Its compressive strength and sulfate resistance meet the requirements of the construction of soil greenhouses walls. The cured wall is strong and corrosion-resistant, which can greatly reduce the maintenance cost of the greenhouse and effectively prolong the service life of the greenhouse.