蒙脱石对保水剂效率提升实验研究

The Effect of Montmorillonite on Water-retaining Agent Efficiency

实验以蒙脱石与保水剂混合,在考虑粒径、重力及与保水剂混合比例的条件下,分析各个因素对保水剂效率提升的影响。其结果如下:(1)在一定重力条件下,保水剂与粒径为6~8、8~10、10~12、12~15 mm的蒙脱石配比分别为1∶24~1∶206、1∶40~1∶199、1∶20~1∶199、1∶40~1∶199时,能够提升保水剂的吸水倍率且其吸水倍率都随时间的增加而增加,待吸水饱和后,吸水倍率增速缓慢。(2)各粒径蒙脱石与保水剂混合,保水剂的吸水倍率随重力的增加而减小,但均高于单独使用保水剂的吸水倍率106 g/g。在重力作用下,12~15 mm的蒙脱石较其他3种粒径与保水剂混合,保水剂吸水倍率最高。(3)保水率都随时间的增加而逐渐降低,各粒径都表现为与保水剂的配比为160/1时保水性较好,12~15 mm的蒙脱石与保水剂混合保水性较其他3种粒径最好。此次实验研究,为提高保水剂效率及其在干旱区的推广应用提供了新的思路。

In this research,the effect of various factors on the water retention and absorption capacity of the absorbent agent are analyzed by considering the particle size,gravity and mixing ratio with absorbent agent.The results show that（1）Under certain gravity conditions,the ratio of water retaining agent to montmorillonite with particle sizes of 6 ～ 8,8 ～ 10,10 ～ 12,and 12 ～ 15 mm is 1 ∶ 24 ～ 1 ∶ 206、1 ∶ 40 ～ 1 ∶ 199、1 ∶ 20 ～ 1 ∶ 199、1 ∶ 40 ～ 1 ∶ 199,respectively.Could enhance the water absorption rate and its water absorption rate increased with the time,when the absorb water saturation,the water absorption rate became slow.（2） Every particle size montmorillonite was mixed with the water absorbent agent,and the water absorbent ratio decreases with the increase of gravity,but it is higher than the water absorption ratio 106 g/g.Under the gravity,montmorillonite with particle size of 12 ～ 15 mm has the highest water absorbency compared with other particle sizes of montmorillonite.（3）The water retention rate decreases with the increase of time.Montmorillonite with particle size of 12 ～ 15 mm has the best water retention rate compared with other particle sizes of montmorillonite.This study provides new ideas for improving the efficiency of water retaining agents and their application in arid regions.