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.

引用

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