Durability and shrinkage of concrete with CDW as recycled aggregates: Benefits from superplasticizer's incorporation and influence of CDW composition

被引：76

作者：

Bravo, M. ^{[1
]}

de Brito, J. ^{[2
]}

Evangelista, L. ^{[3
]}

Pacheco, J. ^{[2
]}

机构：

[1] Polytech Inst Setabal, Barreiro Sch Technol, Dept Civil Engn, CERIS ICIST, Rua Amer Silva Marinho, Lavradio, Portugal

[2] Univ Lisbon, Inst Super Tecn, Dept Civil Engn Architecture & Georresources, CERIS ICIST, Av Rovisco Pais, P-1049001 Lisbon, Portugal

[3] Inst Super Engn Lisboa, Dept Civil Engn, CERIS ISEL, Rua Conselheiro Emidio Navarro 1, P-1959007 Lisbon, Portugal

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 168卷

关键词：

Recycled aggregates; Construction and demolition waste; Water absorption; Carbonation; Chloride ingress; Shrinkage; Eco-efficient concrete; COMPRESSIVE STRENGTH; CARBONATION BEHAVIOR; PERFORMANCE; CONSTRUCTION; PENETRATION;

D O I：

10.1016/j.conbuildmat.2018.02.176

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The shrinkage and durability properties of a total of 34 concrete mixes with recycled aggregates produced from different untreated construction and demolition waste (CDW) were tested. The effect of a polycarboxylic superplasticizer on the enhancement of these properties is presented, discussed, and compared with the findings of studies on concrete whose recycled aggregates are sourced from concrete. All properties were significantly affected by recycled aggregate incorporation and this effect was strongly dependent on the properties of the recycled aggregates of each specific source. The superplasticizer was less efficient in mixes with CDW than when the recycled aggregates were produced from concrete, the most common source of recycled aggregates in experimental works, despite untreated CDW being more practical and desirable from an industrial and environmental perspective. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：818 / 830

页数：13

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