Analysis of Carbonation Behavior of Cracked Concrete
Open Access
Abstract
The crack and carbonation of concrete pose a great challenge to its durability. Therefore, this paper studies the effect of cracks on the carbonation depth of cement paste under different factors. The relationship between carbonation and cracks was determined, and the carbonation mechanism of cement paste with cracks was clarified. The results show that a small water–binder ratio can effectively inhibit the carbonation process. The bidirectional carbonation enlarged the carbonation area around the crack. Within 21 days of the carbonation, the carbonation depth increased with carbonation time, and the Ca(OH)2 on the surface of the specimen was sufficient, allowing for a convenient chemical reaction with CO2. The influence of crack width on the carbonation process at the crack was greater than the influence of the crack depth. Carbonation influenced the hydration of cement-based materials, altering the types and quantities of hydration products. In conclusion, accurately predicting the regularity of carbonation in cracked structures is critical for improving the durability of concrete.Keywords
Funding Information
- National Natural Science Foundation of China (52178223, 51878360, 51778302)
This publication has 28 references indexed in Scilit:
- Estimation of Crack Depth in Concrete Using Diffuse Ultrasound: Validation in Cracked Concrete BeamsJournal of Nondestructive Evaluation, 2016
- Factors affecting crack repairing capacity of bacteria-based self-healing concreteConstruction and Building Materials, 2015
- Capillary absorption of structural lightweight aggregate concreteMaterials and Structures, 2014
- Study on Durability of Concrete with Machine-Made Sand Part II: Long-Term CarbonizationApplied Mechanics and Materials, 2013
- A review: Self-healing in cementitious materials and engineered cementitious composite as a self-healing materialConstruction and Building Materials, 2012
- Analysis of carbonation behavior in concrete using neural network algorithm and carbonation modelingCement and Concrete Research, 2010
- Effect of crack opening on carbon dioxide penetration in cracked mortar samplesMaterials and Structures, 2008
- Predicting carbonation in early-aged cracked concreteCement and Concrete Research, 2006
- Permeability and self-healing of cracked concrete as a function of temperature and crack widthCement and Concrete Research, 2003
- Modelling lime mortar carbonationMaterials and Structures, 1994