Properties of mortar with waste clay bricks as fine aggregate

被引：72

作者：

Dang, Juntao ^{[1
]}

Zhao, Jun ^{[2
]}

Hu, Wenyuan ^{[1
]}

Du, Zhaohua ^{[3
]}

Gao, Danying ^{[1
]}

机构：

[1] Zhengzhou Univ, Coll Civil Engn, Zhengzhou 450001, Henan, Peoples R China

[2] Zhengzhou Univ, Coll Mech & Engn Sci, Zhengzhou 450001, Henan, Peoples R China

[3] Zhengzhou Univ, Multifunct Design & Res Acad, Zhengzhou 450052, Henan, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 166卷

关键词：

Fine recycled aggregates from crushed bricks; Recycled mortar; Physical index; Flowability; Strength; RECYCLED POWDER; CRUSHED BRICKS; CONCRETE; DURABILITY; CEMENT; PERFORMANCE; COARSE; SOLIDS;

D O I：

10.1016/j.conbuildmat.2018.01.109

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In order to solve the problem existing in the utilization of fine recycled aggregates from crushed bricks (RCBA), the replacement of natural fine aggregate (NA) by RCBA to produce a new green recycled mortar is an important technology to develop renewable resource products and realize waste resources recycling. In this paper, in order to deeply understand the mechanism of RCBA, macroscopic and microscopic tests are carried out to study the influence of RCBA with different replacement ratios, particle sizes and additional water contents on the flowability, compressive strength and flexural strength of mortar. And the physical properties, chemical composition, mineral composition and microscopic morphology of RCBA are analyzed. The results show that the porous structure of the waste clay bricks together with the secondary mechanical crushing treatment result in the decline of the physical properties of RCBA. The fully additional water content in RCBA is beneficial to improve the flowability of mortar, but the partially additional water content in RCBA has an adverse impact. In addition, the RCBA with partially additional water content and particle size of 0-5 mm is beneficial to the improvement of mortar strength. However, the RCBA with fully additional water content and particle size of 0.15-5 mm is detrimental to the development of mortar strength. The microscopic test indicates the rough surface and pozzolanic activity of RCBA produce relatively stable and dense interfacial transition zone between the RCBA and cement paste. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：898 / 907

页数：10

共 27 条

[1]

[Anonymous], 2011, 146842011 GBT CHIN S

[2]

[Anonymous], 2016, CONSTR BUILD MATER, DOI DOI 10.1016/J.CONBUILDMAT.2016.06.112

[3]

[Anonymous], 2005, 15962005 GBT CHIN ST

[4]

[Anonymous], 2005, 24192005 GBT CHIN ST

[5]

[Anonymous], 1999, 176711999 GBT CHIN S

[6] Effects of crushed clay brick aggregate on mortar durability [J].

Bektas, F. ;

Wang, K. ;

Ceylan, H. .

CONSTRUCTION AND BUILDING MATERIALS, 2009, 23 (05) :1909-1914

[7] Mechanical properties modeling of recycled aggregate concrete [J].

Bezerra Cabral, Antonio Eduardo ;

Schalch, Valdir ;

Coitinho Dal Molin, Denise Carpena ;

Duarte Ribeiro, Jose Luis .

CONSTRUCTION AND BUILDING MATERIALS, 2010, 24 (04) :421-430

[8] Mechanical properties of brick aggregate concrete [J].

Cachim, Paulo B. .

CONSTRUCTION AND BUILDING MATERIALS, 2009, 23 (03) :1292-1297

[9] Mechanical behaviour of non-structural concrete made with recycled ceramic aggregates [J].

de Brito, J ;

Pereira, AS ;

Correia, JR .

CEMENT & CONCRETE COMPOSITES, 2005, 27 (04) :429-433

[10] The use of coarse and fine crushed bricks as aggregate in concrete [J].

Debieb, Farid ;

Kenai, Said .

CONSTRUCTION AND BUILDING MATERIALS, 2008, 22 (05) :886-893

← 1 2 3 →