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论文类型：期刊论文

发表时间：2021-01-10

发表刊物：CANADIAN JOURNAL OF CIVIL ENGINEERING

卷号：47

期号：11

页面范围：1226-1237

ISSN号：0315-1468

关键字：concrete pavement; polymer-modified cement mortar and concrete; rheological characteristics; mechanical properties; abrasion resistance

摘要：The settlement of fresh concrete or improper operation during construction usually makes the water to cement (w/c) ratio of the cement mortar on the concrete pavement surface higher than designed, which may influence the abrasion resistance of concrete pavement. This study firstly tried to establish relationships between abrasion of hardened cement mortar and rheological characteristics of fresh cement mortar in the laboratory. Secondly, a polymer-modified cement mortar was developed with carboxyl styrene butadiene rubber latex added to the cement mortar. Its rheological properties in mixing, mechanical properties, and abrasion were investigated. It is found that the polymer-modified cement mortar has a much better abrasion resistance and flexural strength while lower compressive strength than cement mortar. A stronger correlation was observed between flexural strength rather than compressive strength and abrasion resistance of cement mortar. The proposed polymer-modified concrete also exhibited good abrasion resistance.