Experimental Study on Early-Age Crack of RC Using TSTM

Abstract:

Thermal stress is a major cause of early-age crack of massive concrete structures. In order to analyze the influencing factors of concrete crack under thermal loads, a series of tests were conducted using the improved Temperature Stress Testing Machine (TSTM). Effects of temperature on crack resistance of concrete were studied on different concrete placing temperatures and curing temperatures. Meanwhile, the roles of reinforcement on concrete crack resistance and crack-width limitation were quantitative analyzed, which compare cracks of plain concrete and reinforced concrete with the same mix proportion. The results indicate that reinforcement can improve the crack resistance of the structures by approximately twenty percents, which against the engineering experience. After concrete cracks, the cracks photos show that reinforcement can induce the smaller cracks formation, and the crack width of reinforced concrete is about 1/10 of the plain concrete crack width.

• Periodical: Advanced Materials Research (Volumes 919-921)
• Pages: 119-122
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.919-921.119
• Online since: April 2014
• Authors: Nan Nan Shi*, Da Hai Huang
• Keywords: Early-Age Crack, Reinforcement, Temperature History, Thermal Stress, TSTM

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