脱硫石膏基无机保温砂浆的配制研究

Preparation of FGD gypsum inorganic thermal insulation mortar Study

以脱硫建筑石膏为胶凝材料,以膨胀玻化微珠为保温隔热轻骨料,并采用可再分散乳胶粉、纤维素醚、聚丙烯纤维等聚合物改性,配制无机保温砂浆,系统研究骨料、乳胶粉、纤维素醚和聚丙烯纤维对保温砂浆保水率、干湿容重、压折比、压剪粘结强度、极限变形量等综合性能的影响。实验结果表明：玻化微珠与石膏体积质量比达为4.5L∶1kg时,保温砂浆干密度达到GB/T20473-2006中Ⅱ类建筑保温砂浆的要求（≤400kg/m3）;达到7L∶1kg时,保温砂浆干密度达到Ⅰ类的要求（≤300kg/m3）。乳胶粉掺量达2%时,压剪粘结强度大于50MPa;纤维素醚掺量达0.6%时,砂浆的保水率从不掺时的64%上升至98%。配制Ⅰ类建筑保温砂浆,玻化微珠和脱硫石膏适宜的体积质量比为7L∶1kg,乳胶粉为2.0%~2.5%,纤维素醚为0.9%~1.0%,聚丙烯纤维为0.5%~0.6%,柠檬酸为0.05%~0.1%。

With FGD gypsum as a cementing material,and With glass beads as the aggregate of The inorganic thermal insulation mortar, Use of dispersible polymer powders, cellulose ethers, polypropylene fiber polymer modified, Study aggregate, latex powder, cellulose ethers, polypropylene fibers on the impact of mortar.