摘要
为研究不同聚合物乳液对水泥砂浆的改性效果,将苯丙乳液(SA乳液)、醋酸乙烯-乙烯共聚乳液(VAE乳液)和丁苯乳液(SB乳液)单掺或复掺到砂浆中,并测试了试件的拉伸粘结强度、抗压强度、抗折强度。结果表明:单掺SA乳液和单掺VAE乳液均能提高试件的拉伸粘结强度,但随着聚灰比的增加,单掺VAE乳液时的试件拉伸粘结强度逐渐降低,单掺SA乳液时的试件拉伸粘结强度逐渐升高;复掺乳液对试件拉伸粘结强度的改善作用由大到小依次是SB-SA复配乳液、SB-VAE复配乳液、SA-VAE复配乳液;相同SB乳液掺量下,SA乳液和VAE乳液的掺入分别对试件的拉伸粘结强度、抗压强度的提升效果较好;当mVAE∶mSB为1∶1时,二者可发挥协同作用,进一步提高了试件的拉伸粘结强度和抗压强度。
In order to study the modification effects of different polymers on mortar,styrene-acrylic emulsion(SA),vinyl acetate ethylene copolymerization emulsion(VAE)and styrene-butadiene emulsion(SB)were added to the mortar by single or compound.The tensile bond strength,compressive strength,flexural strength were tested.The results show that the tensile bond strength of mortar can be improved with the addition VAE or SA single.With the increase of the ratio of polymer to cement,the tensile bond strength of mortar with single-mixing of VAE gradually decreases,the strength of mortar with single-mixing of SA gradually increases.The improvement effect of mixed emulsion on the tensile bond strength of mortar are in descending order:SB-SA,SB-VAE,SA-VAE.Under the same dosage of SB,the incorporation of SA can improves the tensile bond strength of mortar,and the incorporation of VAE can improve the compressive strength of mortar better.When mVAE∶mSB is 1∶1,it has a synergistic role to further improve the tensile bond strength and compressive strength.
作者
王克凡
龙天艳
王娟
周志云
WANG Ke-fan;LONG Tian-yan;WANG Juan;ZHOU Zhi-yun(University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Academy of Building Science Co.,Ltd.,Shanghai 200003,China)
出处
《混凝土与水泥制品》
2023年第5期63-67,共5页
China Concrete and Cement Products
基金
上海市科学技术委员会科研计划课题项目(19DZ1202701)。
关键词
聚合物改性砂浆
单掺
复配
力学性能
Polymer modified mortar
Single-mixing
Compound-mixing
Mechanical property
