Experimental study and multi-physics modelling of concrete under supercritical carbonation

被引：21

作者：

Bao, Hao ^{[1
,2
]}

Yu, Min ^{[1
]}

Xu, Lihua ^{[1
]}

Saafi, Mohamed ^{[3
]}

Ye, Jianqiao ^{[3
]}

机构：

[1] Wuhan Univ, Sch Civil Engn, Wuhan, Hubei, Peoples R China

[2] China Three Gorges Univ, Coll Civil Engn & Architecture, Yichang, Peoples R China

[3] Univ Lancaster, Dept Engn, Lancaster LA1 4YR, England

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 227卷

基金：

中国国家自然科学基金;

关键词：

Carbonation depth; Concrete; Irregularity; Random aggregate model; Supercritical carbonation; ACCELERATED CARBONATION; CEMENT PASTE; AGGREGATE; RESISTANCE; CO2; MORTAR; PENETRATION; MECHANISM; PRESSURE; MOISTURE;

D O I：

10.1016/j.conbuildmat.2019.116680

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents both experimental study and multi-physics modelling of supercritical carbonation of concrete. A novel mathematical model is proposed to simulate random distribution of coarse aggregates in concrete. Supercritical carbonation tests of concrete are carried out and the measured carbonation depth is compared with the simulation results. On the basis of previous research on random field of porosity and supercritical carbonation of cement mortar, a new supercritical carbonation model is developed to study the effect of randomly distributed coarse aggregates and porosity on the irregularities of carbonation depth of concrete. The effect of the type, volume fraction and gradation of coarse aggregates and the porosity of ITZ on the distribution of irregular carbonation depth are also studied. The results demonstrate that the proposed two-dimensional random coarse aggregates model can be used satisfactorily to generate different types, volume fraction and gradation of coarse aggregates with the designed mix proportion within a confined space. The method provides a better and more realistic predictive model for simulating carbonation depth of concrete due to random distribution of coarse aggregates and porosity. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：13

共 54 条

[1] Effect of crack opening on carbon dioxide penetration in cracked mortar samples [J].

Alahmad, S. ;

Toumi, A. ;

Verdier, J. ;

Francois, R. .

MATERIALS AND STRUCTURES, 2009, 42 (05) :559-566

[2] Service life prediction of a concrete bridge structure subjected to carbonation [J].

Ann, K. Y. ;

Pack, S. -W. ;

Hwang, J. -P. ;

Song, H. -W. ;

Kim, S. -H. .

CONSTRUCTION AND BUILDING MATERIALS, 2010, 24 (08) :1494-1501

[3] Experimental and statistical study on the irregularity of carbonation depth of cement mortar under supercritical condition [J].

Bao, Hao ;

Yu, Min ;

Liu, Yu ;

Ye, Jianqiao .

CONSTRUCTION AND BUILDING MATERIALS, 2018, 174 :47-59

[4] Carbon Dating Concrete Cracks [J].

Beasley, Kimball J. .

JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES, 2015, 29 (01)

[5] Studying the hardening and mechanical performances of rice husk and hemp-based building materials cured under natural and accelerated carbonation [J].

Chabannes, Morgan ;

Garcia-Diaz, Eric ;

Clerc, Laurent ;

Benezet, Jean-Charles .

CONSTRUCTION AND BUILDING MATERIALS, 2015, 94 :105-115

[6] The experimental investigation of concrete carbonation depth [J].

Chang, Cheng-Feng ;

Chen, Jing-Wen .

CEMENT AND CONCRETE RESEARCH, 2006, 36 (09) :1760-1767

[7] Effect of porosity on carbonation and hydration resistance of CaO materials [J].

Chen, Min ;

Wang, Nan ;

Yu, Jingkun ;

Yamaguchi, Akira .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (04) :1953-1959

[8] RANDOM PARTICLE MODEL FOR CONCRETE BASED ON DELAUNAY TRIANGULATION [J].

DE SCHUTTER, G ;

TAERWE, L .

MATERIALS AND STRUCTURES, 1993, 26 (156) :67-73

[9] A review of accelerated carbonation technology in the treatment of cement-based materials and sequestration of CO2 [J].

Fernández Bertos, M ;

Simons, SJR ;

Hills, CD ;

Carey, PJ .

JOURNAL OF HAZARDOUS MATERIALS, 2004, 112 (03) :193-205

[10] The ITZ microstructure, thickness and porosity in blended cementitious composite: Effects of curing age, water to binder ratio and aggregate content [J].

Gao, Yun ;

De Schutter, Geert ;

Ye, Guang ;

Tan, Zhijun ;

Wu, Kai .

COMPOSITES PART B-ENGINEERING, 2014, 60 :1-13

← 1 2 3 4 5 6 →