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A platform for research: civil engineering, architecture and urbanism
Tensile strength of plain concrete under sustained load by PT machine
Highlights The linear attenuation of PT strength yields a logarithmic function. Oven-dry concrete has much lower PT strength than partially saturated concrete. Different failure modes can be explained in three ways by various proposed mechanisms.
Abstract This article illustrates new research regarding long-term deterioration in the tensile strength of plain concrete samples due to sustained stress loading. Two different water-cement ratio mixtures were subjected to sustained load using a Pressure Tension (PT) apparatus. Both saturated and oven dry samples were tested. Long-term PT strength under different load levels was found to decrease linearly as a function of the logarithm of time, corroborating existing creep studies. Pressure tension testing was used to determine the original strength of samples, and the effects of sustained load on tensile strength were analyzed. These results were compared with previous data obtained by direct tension tests to demonstrate efficacy of pressure tension testing for long-term creep studies. In addition, based on the analysis of failed samples, an assumption for the mechanism of the damage process is proposed.
Tensile strength of plain concrete under sustained load by PT machine
Highlights The linear attenuation of PT strength yields a logarithmic function. Oven-dry concrete has much lower PT strength than partially saturated concrete. Different failure modes can be explained in three ways by various proposed mechanisms.
Abstract This article illustrates new research regarding long-term deterioration in the tensile strength of plain concrete samples due to sustained stress loading. Two different water-cement ratio mixtures were subjected to sustained load using a Pressure Tension (PT) apparatus. Both saturated and oven dry samples were tested. Long-term PT strength under different load levels was found to decrease linearly as a function of the logarithm of time, corroborating existing creep studies. Pressure tension testing was used to determine the original strength of samples, and the effects of sustained load on tensile strength were analyzed. These results were compared with previous data obtained by direct tension tests to demonstrate efficacy of pressure tension testing for long-term creep studies. In addition, based on the analysis of failed samples, an assumption for the mechanism of the damage process is proposed.
Tensile strength of plain concrete under sustained load by PT machine
Xu, Gaowei (author) / Komar, Andrew (author) / Boyd, Andrew J. (author)
Construction and Building Materials ; 209 ; 260-268
2019-03-01
9 pages
Article (Journal)
Electronic Resource
English
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