聚苯颗粒/发泡石膏保温材料的防水性能改性

Modification of waterproof property for foamed polystyrene grain and foaming gypsum thermal insulation material

采用掺加自制憎水性能优异的SFA防水剂和外喷甲基硅酸钠防水剂两种方式对聚苯颗粒/发泡石膏保温材料进行复合防水改性,研究了不同掺量SFA防水剂对保温材料吸水率、软化系数、密度、导热系数和绝干抗折抗压强度的影响,以及SFA防水剂最优掺量下外喷不同次数甲基硅酸钠防水剂对保温材料吸水率、软化系数的影响,并分析了其作用机理。结果表明:当SFA防水剂的掺量为16%并外喷三次甲基硅酸钠防水剂时,保温材料的各项性能明显改善,其中2h、24h吸水率分别降至40.30%、40.36%,软化系数升高至0.61。

The waterproof property of foamed polystyrene grain and foaming gypsum thermal insulationmaterial is modified by SFA waterproof agent with good hydrophobic property and spraying methyl-sodium.The influences of SFA waterproof agent on the absorption rate, softening coefficient, density, coefficient ofthermal conductivity and dry flexural, compressive strength of insulation material are investigated. Based ondoping the optimum amount of SFA waterproof agent, the effects of different spraying times of methyl-sodiumon the absorption rate and softening coefficient are studied, and their mechanism is also analyzed. Theexperimental results show that the properties of the thermal insulation material are improved obviously withdoping of 16 % of SFA waterproof agent and spraying methyl-sodium 3 times. The absorption rates for 2h and24 h reduce to 40.30 % and 40.36 % respectively and the softening coefficient rises to 0.61.