Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained States
As structures like skyscrapers and long-span bridges become larger, the demand for higher strength of concrete is increasing. However, research on ultrahigh-strength concrete (UHSC) is still in its infancy. In particular, UHSC is known to have a considerably higher level of autogenous shrinkage than...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/3679323 |
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| author | Joo-Ha Lee Kwang-Mo Lim Doo-Yeol Yoo Nam-Hyoung Lim |
| author_facet | Joo-Ha Lee Kwang-Mo Lim Doo-Yeol Yoo Nam-Hyoung Lim |
| author_sort | Joo-Ha Lee |
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| description | As structures like skyscrapers and long-span bridges become larger, the demand for higher strength of concrete is increasing. However, research on ultrahigh-strength concrete (UHSC) is still in its infancy. In particular, UHSC is known to have a considerably higher level of autogenous shrinkage than normal strength concrete (NSC), and the possibility of cracking at an early age is very high. Therefore, in this study, shrinkage and cracking behavior of high-strength concrete (HSC), very-high-strength concrete (VHSC), and UHSC were evaluated through unrestrained shrinkage test and restrained shrinkage test (ring test). The primary experimental variables are the compressive strength level according to the water-to-binder ratio (W/B), fly ash content, and concrete specimen thickness. The experimental results demonstrated that the drying shrinkage decreased as the W/B ratio and the fly ash replacement ratio increased, and the restraint cracks appeared to be the earliest and most brittle in the UHSC with the smallest W/B. Increased concrete thickness and incorporation of fly ash were observed to inhibit crack initiation effectively. |
| format | Article |
| id | doaj-art-61b3c30ee1a64944a9de2b3541f42ff3 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-61b3c30ee1a64944a9de2b3541f42ff32025-02-03T01:11:04ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/36793233679323Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained StatesJoo-Ha Lee0Kwang-Mo Lim1Doo-Yeol Yoo2Nam-Hyoung Lim3Department of Civil Engineering, The University of Suwon, 17 Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi-do 18323, Republic of KoreaDepartment of Civil Engineering, The University of Suwon, 17 Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi-do 18323, Republic of KoreaDepartment of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of KoreaDepartment of Civil Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of KoreaAs structures like skyscrapers and long-span bridges become larger, the demand for higher strength of concrete is increasing. However, research on ultrahigh-strength concrete (UHSC) is still in its infancy. In particular, UHSC is known to have a considerably higher level of autogenous shrinkage than normal strength concrete (NSC), and the possibility of cracking at an early age is very high. Therefore, in this study, shrinkage and cracking behavior of high-strength concrete (HSC), very-high-strength concrete (VHSC), and UHSC were evaluated through unrestrained shrinkage test and restrained shrinkage test (ring test). The primary experimental variables are the compressive strength level according to the water-to-binder ratio (W/B), fly ash content, and concrete specimen thickness. The experimental results demonstrated that the drying shrinkage decreased as the W/B ratio and the fly ash replacement ratio increased, and the restraint cracks appeared to be the earliest and most brittle in the UHSC with the smallest W/B. Increased concrete thickness and incorporation of fly ash were observed to inhibit crack initiation effectively.http://dx.doi.org/10.1155/2017/3679323 |
| spellingShingle | Joo-Ha Lee Kwang-Mo Lim Doo-Yeol Yoo Nam-Hyoung Lim Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained States Advances in Materials Science and Engineering |
| title | Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained States |
| title_full | Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained States |
| title_fullStr | Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained States |
| title_full_unstemmed | Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained States |
| title_short | Deformation Characteristics of Ultrahigh-Strength Concrete under Unrestrained and Restrained States |
| title_sort | deformation characteristics of ultrahigh strength concrete under unrestrained and restrained states |
| url | http://dx.doi.org/10.1155/2017/3679323 |
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