Qiao Wang, Wolfgang Kunther, Ye Li, Talakokula Visalakshi, Ramesh Gomasa, Sofiane Amroun, Diego Jesus De Souza, Mahipal Kasaniya, Ilda Tole, Xuerun Li, R. Douglas Hooton, Prannoy Suraneni, William Wilson
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引用次数: 0
Abstract
Most existing test methods determine the sulfate resistance of concrete using accelerated methods in the laboratory, on mortar or concrete specimens. However, these accelerated tests often use high sulfate concentrations or require very complicated setups, which may alter the deterioration mechanisms, while still being laborious and time-consuming. Additionally, the need for more sustainable binders and distinctive properties of systems incorporating emerging supplementary cementitious materials (SCMs) may limit the applicability of conventional test methods. In this context, the Working Group 3 of RILEM TC 298-EBD aims to develop simple accelerated test methods on cement pastes for evaluating sulfate resistance, which directly investigate the reactive component of concrete. Working at this scale can provide reliable results in a much shorter time than traditional tests on mortars and concretes, while providing means to assess the impact of different SCMs and binders on the resistance to sulfate attack. This paper presents our first step, a critical literature review on sulfate deterioration testing from the concrete/mortar to the cement paste scale. We present a general introduction to sulfate attack, common test parameters, assessment methods, test setups for paste specimens, a discussion of potential approaches, and concluding remarks. Insights gained from this review will be instrumental in establishing an effective and reliable approach to sulfate deterioration testing on cement paste specimens.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.