Strength and microstructure evaluation of recycled glass-fly ash geopolymer as low-carbon masonry units

被引：101

作者：

Arulrajah, Arul ^{[1
]}

Kua, Teck-Ang ^{[1
]}

Horpibulsuk, Suksun ^{[1
,2
]}

Phetchuay, Chayakrit ^{[2
]}

Suksiripattanapong, Cherdsak ^{[3
]}

Du, Yan-Jun ^{[4
]}

机构：

[1] Swinburne Univ Technol, Dept Civil & Construct Engn, Melbourne, Vic, Australia

[2] Suranaree Univ Technol, Sch Civil Engn, Nakhon Ratchasima, Thailand

[3] Rajamangala Univ Technol Isan, Bangkok, Thailand

[4] Southeast Univ, Nanjing, Jiangsu, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 114卷

基金：

中国国家自然科学基金;

关键词：

Glass; Fly ash; Geopolymer; Masonry; Recycling; CALCIUM CARBIDE RESIDUE; CEMENT; CONSTRUCTION; SOIL;

D O I：

10.1016/j.conbuildmat.2016.03.123

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The objective of this research was to evaluate the strength development of industrial by-products, namely Recycled Glass (RG) and Fly Ash (FA) in the manufacture of low carbon masonry units. A low carbon concept for manufacturing masonry units using RG-FA geopolymers was explored by applying low curing temperature of 50 degrees C and a low curing period of just 3-7 days. RG, being rich in silica was used as a filler material. FA, being a silica and alumina rich industrial by-product was used as a precursor in the RG-FA geopolymers. A liquid alkaline activator (L) comprising of a sodium hydroxide-sodium silicate solution was used for the alkali activation of 30% content of FA in the RG-FA blend. Factors found to affect strength development of the RG-FA geopolymers were: (1) the ratio of sodium hydroxide and sodium silicate in the liquid activator, (2) application of a low curing temperature of only 50 C, (3) short curing periods of just 7 days and (4) the L/FA ratios. A geopolymer composed of a 70% Na2SiO3:30% NaOH ratio with a L/FA ratio of 0.625 was found to be the most efficient combination to provide the required unconfined compression strengths for manufacturing masonry. The usage of RG-FA geopolymers as low carbon masonry units was found to be viable using a low curing period of just 7 days and a curing temperature of just 50 degrees C. The RG-FA geopolymers had sufficient compressive strength be used as structural masonry units and needed only a low amount of heat treatment to achieve the minimum strength requirement. Optimally, 30% of FA was found to be sufficient for geopolymerization to occur for this novel low carbon RG-FA masonry units. Furthermore, the core materials needed to produce RG-FA masonry units were industrial by-products, the sustainable usage of which would contribute significantly to efficient waste management, through the production of aesthetically pleasing masonry units. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：400 / 406

页数：7

共 32 条

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