砂土的吸水能力强,保水能力弱。本文采用袋装法,对掺砂保水剂的吸水能力和保水能力给予评价。试验结果表明:当掺砂保水剂混合率在0.05%~0.1%。时,吸水效率最大。掺砂保水剂的吸水能力,随盐分浓度的增加而降低。掺砂保水剂和CaCl_2水溶液的吸水能力比掺砂保水剂和NaCl水溶液的吸水能力低。 Absorption of sand strong, weak water retention capacity. In this paper, bagging method, the water-absorbing ability and water retention capacity of sand-mixed SAP are evaluated. The test results show that when the mixing rate of sand-mixed SAP is between 0.05% and 0.1%. When the maximum water absorption efficiency. Water absorption capacity of sand-retaining agent decreases with the increase of salt concentration. Water-absorbing ability of sand-retaining agent and CaCl 2 solution is lower than that of sand-holding agent and NaCl solution.