激发剂对氯氧镁泡沫水泥发泡过程与性能的影响.pdfVIP

学兔兔 全国中文核心期-T4 钎癯建巍 中国科技核心期刊 激发剂对氯氧镁泡沫水泥 发泡过程与性能的影响 孙诗兵，姚晓丹，田英良 (北京工业大学 材料科学与工程学院，北京 100124) 摘要：研究了激发剂与低密度氯氧镁泡沫水泥发泡倍数、发泡速率和强度的关系。结果表明：随激发剂掺量的增加，发泡倍数不 变，均为4．4倍，但发泡速率随激发剂掺量增加而增大，且随时间推移很快减慢；通过气态方程计算得到25℃时气泡内部压力为 4．02xlO5Pa；出现塌模临界状态时，气泡内的压力为1．07xlO Pa；改变激发剂掺量对氯氧镁泡沫水泥的强度无明显影响，当激发剂掺 量为0．15％～0．55％时，氯氧镁泡沫水泥的28 d抗压、抗折强度分别约为1-30、O．48 MPa。 关键词：激发剂；氯氧镁泡沫水泥；发泡倍数；发泡速率；强度 中图分类号：TU528．042 文献标识码：A 文章编号：1001—702X(2015)09—0057—04 Effects of activator on the preparation and properties of foamed magnesium oxychloride cement SUN Shibing，YA0 Xiaodan，TIAN Yingliang (School of Materials Science and Engineering，Beijing University of Technology，Beijing 100124，China) Abstract：This paper aims to research the effects of activator on the foaming multiple，foaming rate and strength of foamed magnesium oxychloride cement with low density．The results indicate that the foaming multiple remains constant，is 4．4，but the foam ing rate is increasing with activator increasing．The internal pressure of air bubbles is 4．02x10 Pa through equ~ion of state of ideal gas．When the internal pressure of air bubbles achieves 1．07x10 Pa，it is the critical state of collapse．Activator has no effect on strength of magnesium oxychloride cement~amed materia1．When activator content is between O．15％~0．55％，the 28th day com— pressive strength is about 1．30 MPa，the 28th day flexural strength reaches 0．48 MPa． Key words：activator，foamed magnesium oxychloride cement，foaming multiple，foaming rate，strength 氯氧镁水泥是由菱镁矿或白云石经轻烧粉磨而成的轻烧 质防火材料。苏素芹等同采用松香类发泡剂制各氯氧镁水泥 氧化镁与氯化镁和水三元体系经合理配制而形成的气硬性胶 复合保温材料。但目前对低密度(300 k咖 )氯氧镁泡沫水泥 凝材料【l】，具有快凝高强、耐磨性好、粘结性好、阻燃性好、耐高