保水剂对石膏基固沙材料性能的影响

Effect of Water-retaining Agent on Properties of Gypsum Based Sand-fixing Material

采用溶液共混法制备膨润土/聚丙烯酰胺复合保水剂,分析了不同掺量保水剂对石膏基固沙材料性能的影响。结果表明:石膏基固沙材料吸水率和孔隙率随保水剂掺量增加而增大,但抗压强度随保水剂掺量增加而降低,当保水剂掺量为10%时,吸水率为46%,空隙率为45.41%,抗压强度仅有1.73MPa;保水剂掺量在短时间内对石膏基固沙材料保水性能无影响,随着时间延长保水剂掺量增加,材料保水性能增强,48h后保水剂掺量为10%的固沙材料水分还剩19%。本技术为进一步优化石膏基固沙材料配方提供了依据。

With bentonite,polyacrylamide as raw materials,use the method of solution blended process to achieve the preparation of bentonite/polyacrylamide composite water-retention agent.The effect of different dosage of water-retaining agent on the properties of material were analyzed.The results show that：the water absorption and porosity of material increases with increasing dosage of water-retaining agent,but compressive strength decreased.When water-reaining agent content is 10％,water absorption rate was 46％,the gap rate was 45.41％,the compressive strength of only 1.73 MPa.In a short time,the dosage of water-retaining agent had no effect on water retention performance of material,as time grows,it enhanced with increasing dosage,after 48 hours,the material contents 10％ water-retaining agent surplus moisture of 19％.The research will provide the basis for optimizing formulation of gypsum based sand-fixing material.