Identification of ASR and Estimation of ASR Damage by Double Color Staining Technique(Gel Stain Method)
By K. Shimase, H. Yamakawa and M. Kawamura
Concrete Journal, Vol.56, No.3, Mar. 2018
- Synopsis
- The possibility of estimating the development of ASR with a new double color staining technique (gel stain method) developed for the purpose of easily revealing the presence and extent of ASR gel in concrete was investigated. This report examines the identification of the presence of ASR and its distribution based on the staining pattern caused by the application of chemicals to the fractured surface of specimens, and the relationship between the staining characteristics and the expansion process. The distribution of ASR gel inside and around coarse aggregate and fine aggregate particles was clarified using a digital microscope to examine the fracture surface coated with the chemicals in greater detail. As a result, it was found that the presence and extent of ASR can be determined from the staining characteristics of the fractured surface of concrete coated with chemicals.
- Keywords:
- ASR, ASR gel, simple method for identification of ASR damage, gel stain method
