Evaluation of modulus of elasticity of concrete containing both natural and recycled concrete aggregates

被引：21
作者：
Li, Zaiwei [1 ]
Li, Long-yuan [2 ]
Cheng, Shanshan [2 ]
机构：
[1] Shanghai Univ Engn Sci, Sch Urban Railway Transportat, Shanghai 201620, Peoples R China
[2] Univ Plymouth, Sch Engn Comp & Math, Plymouth PL4 8AA, England
来源：
JOURNAL OF CLEANER PRODUCTION | 2024年 / 447卷
基金：
中国国家自然科学基金;
关键词：
Recycled concrete aggregate; Concrete; Elastic modulus; Two-phase modelling; Effective medium approximation; MECHANICAL-PROPERTIES; FORMULATIONS;
D O I：
10.1016/j.jclepro.2024.141591
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
There is growing requirement to use recycled aggregate in concrete to demote industrial wastes produced by construction sectors. Thus, to develop simple but meaningful formulations to assess the mechanical properties of concrete, when it is mixed with both natural and recycled aggregates, becomes essential. In the present study an analytical approach to calculate the elastic modulus of concrete containing both natural and recycled concrete aggregates is proposed. The approach is developed on the concept of effective medium approximation but considering the effect of Poisson's ratio. Two analytical formulas are derived. One is for the two-phase concrete (mortar and aggregate) that is mixed with 100% natural aggregate or 100% recycled concrete aggregate. The other is for the three-phase concrete (mortar, natural aggregate, and recycled concrete aggregate) that is mixed with both natural and recycled aggregates. The analytical formulations are validated using the results obtained from both the numerical simulations and experimental tests. The present analytical model not only provides the simple and meaningful formulations to calculate the effective elastic modulus but also can be used to directly examine the influence of mortar, natural aggregate, recycled concrete aggregate and its replacement ratio to natural aggregate on the elastic modulus of the mixed concrete.
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页数：8
相关论文
共 58 条
[11]   Experimental investigation on flexural behavior of full-scale glued laminated bamboo (glubam)-concrete composite beams: A case study of using recycled concrete aggregates [J].
Deresa, Simret Tesfaye ;
Xu, Jinjun ;
Shan, Bo ;
Ren, Haitao ;
Xiao, Yan .
ENGINEERING STRUCTURES, 2021, 233
[12]  
Dhir R.K., 2019, Recycled Aggregates: Use in Concrete
[13]   Properties of recycled aggregate concrete made with recycled aggregates with different amounts of old adhered mortars [J].
Duan, Zhen Hua ;
Poon, Chi Sun .
MATERIALS & DESIGN, 2014, 58 :19-29
[14]   Microstructure analysis of hardened recycled aggregate concrete [J].
Etxeberria, M. ;
Vazquez, E. ;
Mari, A. .
MAGAZINE OF CONCRETE RESEARCH, 2006, 58 (10) :683-690
[15]   Percolation threshold and effective properties of CNTs-reinforced two-phase composite materials [J].
Fang, Yuan ;
Hu, Shouwang ;
Li, Long-yuan ;
Jang, Sung-Hwan .
MATERIALS TODAY COMMUNICATIONS, 2021, 29
[16]   Heat transfer modelling of carbon nanotube reinforced composites [J].
Fang, Yuan ;
Li, Long-yuan ;
Dassekpo, Jean-Baptiste Mawule ;
Jang, Sung-Hwan .
COMPOSITES PART B-ENGINEERING, 2021, 225
[17]   Piezoresistive modelling of CNTs reinforced composites under mechanical loadings [J].
Fang, Yuan ;
Li, Long-Yuan ;
Jang, Sung-Hwan .
COMPOSITES SCIENCE AND TECHNOLOGY, 2021, 208
[18]   Calculation of electrical conductivity of self-sensing carbon nanotube composites [J].
Fang, Yuan ;
Li, Long-Yuan ;
Jang, Sung-Hwan .
COMPOSITES PART B-ENGINEERING, 2020, 199
[19]   Time-dependent and long-term mechanical properties of concretes incorporating different grades of coarse recycled concrete aggregates [J].
Gholampour, Aliakbar ;
Ozbakkaloglu, Togay .
ENGINEERING STRUCTURES, 2018, 157 :224-234
[20]   New formulations for mechanical properties of recycled aggregate concrete using gene expression programming [J].
Gholampour, Aliakbar ;
Gandomi, Amir H. ;
Ozbakkaloglu, Togay .
CONSTRUCTION AND BUILDING MATERIALS, 2017, 130 :122-145
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