Fractal Cracking Patterns in Concretes Exposed to Sulfate Attack
Open Access
Abstract
Sulfate attack tests were performed on concrete samples with three water-to-cement ratios, and micro-crack growth patterns on concrete surfaces were recorded. The expansive stress and crack nucleation caused by delayed ettringite formation (DEF) were studied using X-ray diffraction and scanning electron microscopy. By means of a digital image processing technology, fractal dimensions of surface cracking patterns were determined, which monotonously increase during corrosion. Moreover, it is shown that the change of fractal dimensions is directly proportional to accumulation of DEF, and therefore, a simple theoretical model could be proposed to describe the micro-crack evolution in concretes under sulfate attack.Keywords
Funding Information
- National Natural Science Foundation of China (11832013)
This publication has 46 references indexed in Scilit:
- Sulfate Resistance of Recycled Aggregate Concrete with GGBS and Fly Ash-Based GeopolymerMaterials, 2019
- Durability of concrete structures in tropical atoll environmentOcean Engineering, 2017
- Chloride diffusion study of coral concrete in a marine environmentConstruction and Building Materials, 2016
- A numerical study on chloride migration in cracked concrete using multi-component ionic transport modelsComputational Materials Science, 2015
- A three-phase, multi-component ionic transport model for simulation of chloride penetration in concreteEngineering Structures, 2015
- Chemical, Mechanical, and Durability Properties of Concrete with Local Mineral Admixtures under Sulfate Environment in Northwest ChinaMaterials, 2014
- The confused world of sulfate attack on concreteCement and Concrete Research, 2004
- The use of tension testing to investigate the effect of W/C ratio and cement type on the resistance of concrete to sulfate attackCement and Concrete Research, 2004
- Sulfate attack research — whither now?Cement and Concrete Research, 2001
- “Sulfate attack,” or is it?Cement and Concrete Research, 1999