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在石膏砂浆中掺入可再分散乳胶粉、羟丙基甲基纤维素醚和缓凝剂,制备加气混凝土板材专用修补剂,研究了原材料掺量对其凝结时间、抗压强度、压剪粘结强度、保水性和膨胀率等性能的影响,并进行生产应用。结果表明,该修补剂凝结时间适中,具有良好的黏结强度、体积稳定性和保水性,修补后与基材基本无色差,观感良好。
In the gypsum mortar incorporation of redispersible polymer powder, hydroxypropyl methyl cellulose ether and retarder, prepared aerated concrete sheet special repair agent, the study of the raw material content of its setting time, compressive strength, pressure shear Knot strength, water retention and expansion rate and other performance, and production and application. The results showed that the setting time of the repair agent was moderate, with good bond strength, volume stability and water retention. After repair, it had almost no color difference with the substrate, and the appearance was good.