Effect of air entrainment on the performance of reactive MgO and PC mixes

被引：41

作者：

Ruan, S. ^{[1
]}

Unluer, C. ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Civil & Environm Engn, 50 Nanyang Ave, Singapore 639798, Singapore

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 142卷

关键词：

Reactive MgO; Air-entrainment agent; Carbonation; Porosity; Strength; Microstructure; Thermal conductivity; LIFE-CYCLE ASSESSMENT; ACCELERATED CARBONATION; CEMENT PASTE; FLY-ASH; THERMAL-DECOMPOSITION; TRANSPORT-PROPERTIES; MAGNESIA CEMENTS; POROUS BLOCKS; HIGH-VOLUME; CO2;

D O I：

10.1016/j.conbuildmat.2017.03.068

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study investigated the influence of air-entraining agents (AEA) on the performance and microstructure of reactive MgO cement (RMC) samples in comparison with Portland cement (PC) samples under different water contents and curing conditions. Porosity, density, workability, strength, pH and thermal conductivity measurements were supported with XRD, TGAIDSC and SEM analyses. Performance of RMC samples depended on the dense formation of carbonate phases such as nesquehonite and hydro-magnesite, whereas PC samples gained strength by hydration. Introduction of AEA reduced early strength due to increased air contents. This was compensated by increased CO2 penetration, carbonation and strength gain in longer periods. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：221 / 232

页数：12

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