纤维素醚对无砂自流平材料物理力学性能的影响  

Impacts of Cellulose Ethers on Physical and Mechanical Properties of Non-Sand Self-Leve Materials

作　　者：欧志华[1] 赵明明 李光球 李家楣 李芳涛 曹晖[1] OU Zhihua;ZHAO Mingming;LI Guangqiu;LI Jiamei;LI fangtao;CAO Hui(School of Civil Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan,China;Hunan SANSHU New Material Research Institute Co.,Ltd.,Changsha 410100,Hunan,China)

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007 [2]湖南省三树新材料研究院有限公司,湖南长沙410100

出　　处：《上海建材》2022年第6期10-13,共4页Shanghai Building Materials

基　　金：湖南省自然科学基金株洲联合基金资助项目(2021JJ50044)。

摘　　要：将自流平砂浆中的细骨料换成粉料,制成无砂自流平材料,可以减少离析并充分利用废弃粉料。试验研究了2种不同黏度的纤维素醚对无砂自流平材料流动度和力学性能的影响,结果表明:随低黏纤维素醚掺量的增加,自流平材料的初始流动度和30min流动度都先增加,后逐渐减少,抗新和抗压强度大体上呈先增加后减少,再趋于稳定的趋势;随中黏纤维素醚掺量的增加,自流平材料的流动度先下降,后略有提升并保持稳定,抗新和抗压强度大体上呈先下降较快,后有所增加且总体上保持稳定的趋势。中黏纤维素醚不适合用于自流平材料,应该选择使用低黏的纤维素醚,且掺量小于0.2‰。Non-sand self-levelling material,produced by replacing the fine aggregate in self-levelling mortars with powder,can reduce segregation and the use of a large amount of waste powder.In this paper,the effect of two kinds of cellulose ethers with different viscosity on the fluidity and strength of non-sand self-levelling materials was studied.The results show that with the increase of the content of low viscosity cellulose ether,the initial fluidity and 30min fluidity of self-levelling materials increase before they gradually decrease,and the strength increases followed by its decrease,and then tends to be stable.With the increase of medium viscosity cellulose ether content,the fluidity of self-levelling materials decreases initially,then slightly increases and ends in stable,and the strength generally decreases rapidly before it increases and remains stable in general.In conclusion,medium-viscosity cellulose ether is superior to low-viscosity cellulose ether,and ideally should be used in self-levellingmaterialswitha dosageof less than 0.2‰.

关 键 词：无砂自流平材料 纤维素醚 流动度 抗新强度 抗压强度 

分 类 号：TU526[建筑科学—建筑技术科学]