Mechanical Properties of Fly Ash Concrete After Creep and Being Subjected to Different Stresses

ZHONG Zhiwu

doi:10.13204/j.gyjzG21112105

Volume 52 Issue 4

Jul. 2022

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ZHONG Zhiwu. Mechanical Properties of Fly Ash Concrete After Creep and Being Subjected to Different Stresses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 152-157,132. doi: 10.13204/j.gyjzG21112105

Citation:

ZHONG Zhiwu. Mechanical Properties of Fly Ash Concrete After Creep and Being Subjected to Different Stresses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 152-157,132. doi: 10.13204/j.gyjzG21112105

ZHONG Zhiwu. Mechanical Properties of Fly Ash Concrete After Creep and Being Subjected to Different Stresses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 152-157,132. doi: 10.13204/j.gyjzG21112105

Citation:

ZHONG Zhiwu. Mechanical Properties of Fly Ash Concrete After Creep and Being Subjected to Different Stresses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 152-157,132. doi: 10.13204/j.gyjzG21112105

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Mechanical Properties of Fly Ash Concrete After Creep and Being Subjected to Different Stresses

doi: 10.13204/j.gyjzG21112105

ZHONG Zhiwu

China Railway Eighteenth Bureau Group Co., Ltd., Tianjin 300222, China

Received Date: 2021-11-21
Available Online: 2022-07-25

Abstract

Abstract

In order to research the influence of sustained loads on the mechanical properties of concrete, taking the Tianjin Metro Line 6 Lushuidao station as the engineering background, the creep development of concrete under different sustained times and sustained stresses was tested, as well as the static performance of concrete after creep. At the same time, the static loading test for shrinkage specimens with the same environmental conditions of creep specimens was also carried out. The results showed that under 15% and 30% stress level, the elastic modulus of concrete after creep increased gradually with the sustained time, but its increase rate reduced. The elastic modulus of shrinkage specimens under the same environmental conditions also had a certain growth, and the value was about 5% lower than that of holding specimens at 0.3 stress level. With the increase of sustained time, the slope of the stress-strain curve of concrete after creep increased in the elastic stage, and the peak stress also increased. Under the same environmental conditions, the slope of the stress-strain curve of the shrinkage specimen without sustained loads also increased in the elastic stage, the peak stress was lower than that of the creep specimen, which was about 65% of that of the creep specimen.
- concrete,
- mechanical properties,
- shrinkage,
- creep,
- constitutive

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References(24)

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