水泥基不燃性轻质保温材料制备的研究.pdfVIP

学兔兔 全国中文核心期刊 新癯建览 中国科技核心期刊 水泥基不燃性轻质保温~I$,15tl备的研究 秦璜，潘志华，吕钦刚 (南京工业大学 材料科学与工程学院，江苏南京 210009) 摘要：以水泥为主要原料制成的密度小于300 kg,／m3的泡沫混凝土，是一种新型外墙外保温材料。采用硅酸盐水泥为主要原料 在实验室研究了这种材料的制备方法，并系统地研究了几种混凝土外加剂对该材料制备过程及其性能的影响。结果表明，以硅酸盐 水泥为主要原料，并适量添加适宜的混凝土外加剂，可以制得性能优良的低密度泡沫混凝土；其中，几种外加剂的适宜掺量分别为： 早强剂1．8％，促凝剂0．8％；聚丙烯纤维O．8％～1．0％；憎水剂O．1％～0．2％，苯丙乳液O．3％～0．4％。在此最佳条件下制得泡沫混凝土的 干密度为290kg／m3，28 d抗压强度可达1．1 MPa，吸水率为6．11％，导热系数为0．07W／(m·K)。 关键词：水泥基；不燃性；轻质；保温材料；发泡 中图分类号：TU55+1．3 文献标识码：B 文章编号：1001—702X(2012)04—0027—04 Study on the preparation of cement based nonflammable lightweight thermal insulation material QmHuang，PANZhihua，LV Qingang (College of Materials Science＆Engineering，Nanjing University of Technology，Nanjing 210009，Jiangsu，China) Abstract：A foamed concrete，made from cement as its main component and with its density less than 300 kg／m3，is a novel insulation material for exterior wal1．The preparation method of this material was studied in the laboratory with Portland cement as its main raw material，and the influence of some chemical admixtures on the preparation process and the properties of the resultant material were carried in laboratory systematically．Results show that high performance and low density foamed concrete can be prepared with Portland cement as its main raw material and with aid of proper addition of some chemical admixtures，among which the appropriate dosage of the chemical admixtures are as follows：strengthening agent 1．8％，setting accelerator 0．8％，polypropylene fiber 0．8％-1．O％，hydrophobic agent O．1％-0．2％and styrene—acrylic emulsion 0．3％-0．4％．Foam