Clay-based construction and demolition waste as a pozzolanic addition in blended cements. Effect on sulfate resistance

被引：29

作者：

Asensio de Lucas, Eloy ^{[1
]}

Medina, Cesar ^{[2
]}

Frias, Moises ^{[1
]}

Sanchez de Rojas, Maria Isabel ^{[1
]}

机构：

[1] Eduardo Torroja Inst Construct Sci CSIC, Madrid 28033, Spain

[2] Univ Extremadura, Sch Civil Engn, UEX CSIC Partnering Unit, Caceres 10071, Spain

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 127卷

关键词：

Construction; Demolition; Waste; Clay-based material; Pozzolanic additions; Cement; Sulfate attack; ALTERNATIVE RAW-MATERIAL; SANITARY WARE INDUSTRY; UNPAVED RURAL ROADS; PORTLAND-CEMENT; FLY-ASH; MECHANICAL-PROPERTIES; RECYCLED CONCRETE; MAGNESIUM-SULFATE; COARSE AGGREGATE; ACTIVATED SLAG;

D O I：

10.1016/j.conbuildmat.2016.10.047

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The significant structural implications of cement durability have given rise to substantial research on the subject. This study explores the performance of new blended cements bearing pozzolanic construction and demolition waste (C&DW) as an addition when exposed to sulfate attack. Durability is studied in cement pastes with and without C&DW, addressing the formation of new compounds, mechanical strength, outward appearance and porosity after soaking in two concentrations of sodium sulfate solution for exposure times ranging from 14 to 56 days. The findings confirm that the inclusion of clay-based C&DW improves blended cement durability. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：950 / 958

页数：9

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