Study on Properties of Cement Mortar Modified by Styrene-acrylic Ester Redispersible Powder
This study is conducted to evaluate physical and mechanical properties of styrene-acrylic ester (SAE) redispersible powder-modified cement mortar. The physical properties, such as water retention, air content, bulk density, and mechanical properties, such as compressive strength, flexural strength, and adhesive strength are studied. The SAE redispersible powder-modified mortar has remarkably improved water retention over unmodified mortar. A quantity of air is entrained with the range between 6.8％ and 13％ according to the SAE redispersible powder content. The bulk density of mortar in fresh and hardened stages both declines firstly to a minimum, and then slightly goes up with the increasing polymer content. A noticeable increase in flexural strength but no improvement in compressive strength is shown in mortar compared with unmodified one. The adhesive strength between SAE redispersible powder-modified mortar and concrete substrate has been enhanced compared to conventional mortar. By ESEM investigation, the presence of polymer films and bridges in the cement matrix is demonstrated.
polymer-modified mortar styrene-acrylic ester redispersible powder physical properties
Peiming Wang Engui Liu Ru Wang
Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
国际会议
6th Asian Symposium on Polymers in Concrete(第六届亚洲聚合物混凝土国际会议)
上海
英文
514-522
2009-10-29（万方平台首次上网日期，不代表论文的发表时间）