Work

Evaluation of concrete frost resistance using drilled concrete powder

Year: 2024

Type: article

Abstract: Monitoring in-situ frost damage of concrete structures has always been a substantial challenge. Core tests are commonly used for direct evaluation of frost damage, but they affect structural integrity and are unsuitable for ongoing monitoring. Therefore, investigating on other evaluation methods that induce minimal damage is necessary. This study examines the applicability of the drilling powder method for estimating the degree of frost damage in concrete. Concrete samples were prepared using different water–cement ratios, curing conditions, and air-entrained admixture dosages. The powder samples were extracted using a 4-mm drilling bit, and the pore structures of the powder were evaluated. Their correlation with the degree of frost damage is examined. The results showed that the degree of frost damage can be evaluated based on the threshold powder porosity. These findings indicate that the proposed method can potentially be employed for minimal damage assessments of concrete structures in cold regions.

Source: Procedia Structural Integrity

DOI: 10.1016/j.prostr.2024.09.220

Authors: Sothyrak Rath, Xi Ji, Yuya Takahashi, Shunsei Tanaka, Yuya Sakai

Institutions: The University of Tokyo, Taisei (Japan), Institute of Industrial Science, The University of Tokyo

Language: English

Topic: Concrete Corrosion and Durability

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: diamond

Funder: Japan Society for the Promotion of Science