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University of Colorado, Boulder

Concrete

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Thermal Strain Of Concrete Under Low Temperatures And Durability And Processing Techniques Of Concrete With Cnts, Xingang Wang Jan 2013

Thermal Strain Of Concrete Under Low Temperatures And Durability And Processing Techniques Of Concrete With Cnts, Xingang Wang

Civil Engineering Graduate Theses & Dissertations

This thesis consists of two topics: Thermal strain of concrete under low temperatures, and durability and processing techniques of concrete with CNTs. The low temperature test studies the anti-freezing action of concrete under cooling environment. Concrete mixes using different amounts of air-entraining agent and water/cement ratios were made and cured under different humidity environments. During the cooling process from 10 ºC to -25 ºC, the strain of concrete was measured every 3~5 ºC. The strain-temperature curve of concrete under different mixing proportion was produced from these results. A numerical model was developed based on the theory of the ...