AM常温原位聚合固化盐渍土的力学性能研究

摘要

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 ado-be were discussed in this paper, draw the optimum reaction con-ditions in situ polymerization of acrylamide, to reinforce the modification effect of saline soil. ①At room temperature, acryl-amide monomer dosage for saline soil was 3%, the dosage of in-itiator 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. ②Compari-son 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.%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。