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Influence of earthquake disturbance on concrete strength at early age

Construction projects commonly run for years in earthquake zones always have certain seismic risks during the construction process. For early-age concrete that has not fully reached the design strength, whether earthquake action will affect its final strength, and to what extent, needs to be studied...

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Main Authors: Lu, Yang, Ma, Xiaotong, Bao, Chao, Md. Noor, Norhazilan, Lian, Huahua, Lim, Kar Sing
Format: Article
Published: Elsevier Ltd 2022
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/103579/
http://dx.doi.org/10.1016/j.pce.2022.103280
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spelling my.utm.1035792023-11-20T02:51:16Z http://eprints.utm.my/103579/ Influence of earthquake disturbance on concrete strength at early age Lu, Yang Ma, Xiaotong Bao, Chao Md. Noor, Norhazilan Lian, Huahua Lim, Kar Sing TA Engineering (General). Civil engineering (General) Construction projects commonly run for years in earthquake zones always have certain seismic risks during the construction process. For early-age concrete that has not fully reached the design strength, whether earthquake action will affect its final strength, and to what extent, needs to be studied. This paper experimentally studied the influence of earthquake on final strength of concrete of grade C30 and C35 with earthquake simulation shaking table at the curing age of 3 h (h) and 8 h (h). Seismic wave speed of 0.1g, 0.2g, 0.3g, 0.4g, 0.5g was applied to the test blocks except for control specimens. After being disturbed by the earthquake at the age of 3h, it still has certain fluidity and can be well recovered by hydration process, hence the strength reduction is less than 4%. In contrast, at the age of 8h, the concrete block is in the final setting stage and become a solid state. After being disturbed by earthquakes, the compressive strength of these specimens has a significant decrement trend compared to the control specimen. Based on the findings, concrete at initial setting stage is less affected by seismic wave. While the seismic wave speed has a more obvious effect on the final strength for concrete at the final setting stage, i.e. when peak acceleration disturbance is greater than 0.4g. It was also observed that the final strength decreases with the increase of the acceleration peak value. Elsevier Ltd 2022-12 Article PeerReviewed Lu, Yang and Ma, Xiaotong and Bao, Chao and Md. Noor, Norhazilan and Lian, Huahua and Lim, Kar Sing (2022) Influence of earthquake disturbance on concrete strength at early age. Physics and Chemistry of the Earth, 128 (NA). pp. 1-5. ISSN 1474-7065 http://dx.doi.org/10.1016/j.pce.2022.103280 DOI:10.1016/j.pce.2022.103280
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Lu, Yang
Ma, Xiaotong
Bao, Chao
Md. Noor, Norhazilan
Lian, Huahua
Lim, Kar Sing
Influence of earthquake disturbance on concrete strength at early age
description Construction projects commonly run for years in earthquake zones always have certain seismic risks during the construction process. For early-age concrete that has not fully reached the design strength, whether earthquake action will affect its final strength, and to what extent, needs to be studied. This paper experimentally studied the influence of earthquake on final strength of concrete of grade C30 and C35 with earthquake simulation shaking table at the curing age of 3 h (h) and 8 h (h). Seismic wave speed of 0.1g, 0.2g, 0.3g, 0.4g, 0.5g was applied to the test blocks except for control specimens. After being disturbed by the earthquake at the age of 3h, it still has certain fluidity and can be well recovered by hydration process, hence the strength reduction is less than 4%. In contrast, at the age of 8h, the concrete block is in the final setting stage and become a solid state. After being disturbed by earthquakes, the compressive strength of these specimens has a significant decrement trend compared to the control specimen. Based on the findings, concrete at initial setting stage is less affected by seismic wave. While the seismic wave speed has a more obvious effect on the final strength for concrete at the final setting stage, i.e. when peak acceleration disturbance is greater than 0.4g. It was also observed that the final strength decreases with the increase of the acceleration peak value.
format Article
author Lu, Yang
Ma, Xiaotong
Bao, Chao
Md. Noor, Norhazilan
Lian, Huahua
Lim, Kar Sing
author_facet Lu, Yang
Ma, Xiaotong
Bao, Chao
Md. Noor, Norhazilan
Lian, Huahua
Lim, Kar Sing
author_sort Lu, Yang
title Influence of earthquake disturbance on concrete strength at early age
title_short Influence of earthquake disturbance on concrete strength at early age
title_full Influence of earthquake disturbance on concrete strength at early age
title_fullStr Influence of earthquake disturbance on concrete strength at early age
title_full_unstemmed Influence of earthquake disturbance on concrete strength at early age
title_sort influence of earthquake disturbance on concrete strength at early age
publisher Elsevier Ltd
publishDate 2022
url http://eprints.utm.my/103579/
http://dx.doi.org/10.1016/j.pce.2022.103280
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score 13.211869

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