TY - GEN
T1 - Shrinkage Deformation of Ultra-High Performance Concrete Under Different Field Conditions
AU - Wang, Yougang
AU - Sun, Yunlun
AU - Mu, Shaoxiong
AU - Luo, Sheng
AU - Guo, Quanquan
AU - Zhang, Wuman
N1 - Publisher Copyright:
© 2024 Proceedings of the 12th Academic Conference of Geology Resource Management and Sustainable Development, GRMSD 2024. All rights reserved.
PY - 2024
Y1 - 2024
N2 - This study investigates the shrinkage deformation of ultra-high performance concrete (UHPC) under three exposure conditions: standard conditions (20℃, 60% RH), outdoor natural conditions (17℃ to 3℃, 17% to 53% RH) and low temperature conditions (3℃, 36% to 50% RH). Polycarboxylate superplasticizer and polyether shrinking reducing agent are used to control the workability and shrinkage deformation, respectively. The results show that the drying shrinkage of UHPC with SRA (UHPC-SRA) under standard conditions increases logarithmically with the testing time and tends to a stable value. For UHPC-SRA under 3℃, the average deformation on the 10th day is 8.9 times that on the 4th days. The early increase rate is the highest of the three exposure conditions. For UHPC-SRA under outdoor natural conditions, the later average deformation continues to increase at a higher rate. Both low temperature and outdoor natural conditions elevate the cracking risk of UHPC in field applications.
AB - This study investigates the shrinkage deformation of ultra-high performance concrete (UHPC) under three exposure conditions: standard conditions (20℃, 60% RH), outdoor natural conditions (17℃ to 3℃, 17% to 53% RH) and low temperature conditions (3℃, 36% to 50% RH). Polycarboxylate superplasticizer and polyether shrinking reducing agent are used to control the workability and shrinkage deformation, respectively. The results show that the drying shrinkage of UHPC with SRA (UHPC-SRA) under standard conditions increases logarithmically with the testing time and tends to a stable value. For UHPC-SRA under 3℃, the average deformation on the 10th day is 8.9 times that on the 4th days. The early increase rate is the highest of the three exposure conditions. For UHPC-SRA under outdoor natural conditions, the later average deformation continues to increase at a higher rate. Both low temperature and outdoor natural conditions elevate the cracking risk of UHPC in field applications.
KW - Deformation
KW - Shrinkage
KW - Ultra-high performance concrete (UHPC)
KW - shrinkage reducing agent (SRA)
UR - https://www.scopus.com/pages/publications/105001109942
U2 - 10.52202/079116-0231
DO - 10.52202/079116-0231
M3 - 会议稿件
AN - SCOPUS:105001109942
T3 - Proceedings of the 12th Academic Conference of Geology Resource Management and Sustainable Development, GRMSD 2024
SP - 1787
EP - 1793
BT - Proceedings of the 12th Academic Conference of Geology Resource Management and Sustainable Development, GRMSD 2024
A2 - Zhang, Henry
A2 - Cheng, Changbo
PB - Aussino Academic Publishing House
T2 - 12th Academic Conference of Geology Resource Management and Sustainable Development, GRMSD 2024
Y2 - 14 December 2024 through 15 December 2024
ER -