A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Suppressing Alkali-Silica Expansion
Due mainly to the limited durability of conventional concrete, concrete structures tend to have a shorter service life than expected. At the root of this problem is the brittle nature of concrete. To overcome this persistent problem, ductile ECC can be effective in eliminating the need for repeated maintenance. Given that cracks tend to accelerate the deterioration by creating additional pathways for aggressive agents, many durability problems can be reduced and/or overcome by the high ductility and self-controlled microcracking behavior of ECCs. Along with many other mechanisms affecting the durability of infrastructures, ASR has been shown to be harmful, especially for concrete structures subjected to prolonged service periods. While ECC applications in the field have been relatively recent, the limited experience indicates that ASR is not a concern for structures comprising ECCs. This is corroborated by laboratory test results that demonstrate the ASR suppression mechanisms of ECC -- high pozzolanic material content, nonreactive aggregates, and microfibers.
Suppressing Alkali-Silica Expansion
Due mainly to the limited durability of conventional concrete, concrete structures tend to have a shorter service life than expected. At the root of this problem is the brittle nature of concrete. To overcome this persistent problem, ductile ECC can be effective in eliminating the need for repeated maintenance. Given that cracks tend to accelerate the deterioration by creating additional pathways for aggressive agents, many durability problems can be reduced and/or overcome by the high ductility and self-controlled microcracking behavior of ECCs. Along with many other mechanisms affecting the durability of infrastructures, ASR has been shown to be harmful, especially for concrete structures subjected to prolonged service periods. While ECC applications in the field have been relatively recent, the limited experience indicates that ASR is not a concern for structures comprising ECCs. This is corroborated by laboratory test results that demonstrate the ASR suppression mechanisms of ECC -- high pozzolanic material content, nonreactive aggregates, and microfibers.
Suppressing Alkali-Silica Expansion
Mustafa Sahmaran (author) / Victor C Li
2016
Article (Journal)
English
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