AM常温原位聚合固化盐渍土的力学性能研究

Mechanical properties research of solidified saline soil in-situpolymerization of AM at room temperature

本文探讨了常温下丙烯酰胺单体（AM）、过氧还原体系引发剂（过硫酸铵-过硫酸氢钠）、交联剂（N-N亚甲基双丙烯酰胺）的用量对盐渍土土坯力学性能的影响,得出了丙烯酰胺常温原位聚合的最佳反应条件,从而达到加固改性盐渍土的目的。1在室温下,丙烯酰胺单体用量为盐渍土用量的3%,引发剂用量为丙烯酰胺用量的2%,引发剂体系过硫酸铵-过硫酸氢钠质量比为1∶1,交联剂用量为丙烯酰胺用量的1%,土坯养护28 d后,抗折强度达到5.2 MPa,抗压强度达到16.3 MPa。2和空白土坯试样的力学性能对比,AM常温原位聚合改性后的土坯试样的抗折强度和抗压强度是原来的4~5倍。

At room temperature, the acrylamide monomer, peroxideredox initiator （ ammonium persulfate sodium bisulfate had）, crosslinking agent （ N - N methylene bis acrylamide） were investigated on the mechanical properties of saline soil adobe were discussed in this paper, draw the optimum reaction conditions in situ polymerization of acrylamide, to reinforce the modification effect of saline soil. ①At room temperature, acrylamide monomer dosage for saline soil was 3%, the dosage of initiator is 2% of the amount ofinitiator, acrylamide, ammonium persulfate sodium bisulfate system had a ratio of 1∶1, and the dosage of crosslinking agent is 1% of the amount ofinitiator, 28 days after the adobe maintenance, flexural strength reached 5. 2MPa, compressive strength reached16. 3MPa. ②Comparison of mechanical properties and adobe blank group test samples at room temperature, AM in situ polymerization Adobe specimen of the flexural strength and compressive strength was 4-5 times of the original.