Durability of recycled aggregate concrete designed with equivalent mortar volume method

被引：318

作者：

Abbas, Abdelgadir ^{[2
]}

Fathifazl, Gholamreza ^{[3
]}

Isgor, O. Burkan ^{[1
]}

Razaqpur, A. Ghani ^{[4
]}

Fournier, Benoit ^{[5
]}

Foo, Simon ^{[6
]}

机构：

[1] Carleton Univ, Dept Civil & Environm Engn, Ottawa, ON K1S 5B6, Canada

[2] Amec Amer, Calgary, AB, Canada

[3] Adjeleian Allen Rubeli Consulting Struct Engineer, Ottawa, ON, Canada

[4] McMaster Univ, Dept Civil Engn, Hamilton, ON, Canada

[5] Univ Laval, Dept Geol & Geol Engn, Quebec City, PQ, Canada

[6] Publ Works & Govt Serv Canada, Gatineau, PQ, Canada

来源：

CEMENT & CONCRETE COMPOSITES | 2009年 / 31卷 / 08期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Recycled concrete aggregate (RCA); RCA-concrete; Mix design; Chloride penetration; Carbonation; Freeze-and-thaw action; FLY-ASH;

D O I：

10.1016/j.cemconcomp.2009.02.012

中图分类号：

TU [建筑科学];

学科分类号：

081407 [建筑环境与能源工程];

摘要：

Results of a comprehensive investigation about the durability of structural-grade concrete made with recycled concrete aggregate (RCA) are presented. The RCA-concrete mixes were proportioned using a new concrete mix design method, termed the equivalent mortar volume (EMV) method. The EMV method is based on the hypothesis that RCA is a composite material comprising mortar and natural aggregate; therefore, when proportioning a concrete mixture containing RCA, one must account for the relative amount and properties of each the two components and adjust both the fresh coarse aggregate and fresh paste content of the mix accordingly. Tests were conducted to study the freeze-thaw, chloride penetration and carbonation resistances of the mixes proportioned by the EMV method and by the conventional method. Results of the test showed that RCA-concrete mixes proportioned by the EMV method have higher resistance to freeze-thaw action, chloride penetration and carbonation than those designed and they satisfy the Current requirements for concrete exposed to severe with the conventional method, environments. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：555 / 563

页数：9

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