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干混砂浆专用增效剂的性能研究
作者：陈周鹏
（科之杰新材料集团福建有限公司，福建 厦门 361101）
摘要：以Point-Z型预拌砂浆专用增效剂为主要原料，通过测试普通干混砂浆力学和工作性能，研究了不同增效剂掺量、水泥减少率、温度、砂浆强度等级下该增效剂对普通干混砂浆性能的影响。实验结果表明，随着增效剂掺量的增加，增效剂性能呈现出先提高后平稳的趋势；温度升高有助于发挥增效剂性能；砂浆强度等级与增效剂的促进效果存在正相关关系；当水泥减少率为8%~12%时，掺加增效剂的干混砂浆工作性能与基准砂浆基本一致；掺加增效剂后，砂浆的渗透压力有所增加。
关键词：干混砂浆增效剂；抗压强度；保水率；拉伸粘结强度；渗透压力
中图分类号：TU528.042 文献标识码：A 文章编号：1001-702X（2020）08-0111-04
Study on performance of special synergist for dry mixed mortar
CHEN Zhoupeng
（Kezhijie New Materials Group Fujian Co. Ltd.，Xiamen 361101，China）
Abstract：By measuring the mechanical properties and working performance of ordinary dry mortar，we have conducted a research on how different amounts of admixture，substitution ratios of cement，temperatures and strength grades of mortar exert influences on ordinary dry mortar with the usage of Point-Z synergist for ready-mixed mortar. The experimental results show that the performance of synergist increases first and then remains unchanged with the increase of its dosage. On the other hand，there is a positive correlation between the strength grade of mortar and the performance of synergist. And a higher temperature helps to maximize the performance of the synergist. When the substitution ratio of cement is 8%~12%，the working performance of the dry mortar mixed with the synergist is basically the same as that of the reference mortar. And the osmotic pressure of mortar increases with the addition of synergist.
Key words：dry mixed mortar synergist，compressive strength，water retention rate，tensile bond strength，osmotic pressure