Materials Reports 2022, Vol. 36 Issue (Z1): 21120009-5 |
INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
|
|
|
|
|
Experimental Study on Compressive Strength of Concrete Under Combined Action of Freeze-Thaw Cycle and Prestress |
CHEN Ruiming1, XIANG Yangkai2, LIANG Lu3, ZHAO Yi2
|
1 Urban and Rural Planning and Construction Branch of Guiyang Vocational and Technical College, Guiyang 550081, China 2 School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China 3 School of Water Conservancy and Construction Engineering, Shihezi University, Shihezi 832000, Xinjiang, China |
|
|
Abstract In order to study the strength loss law of concrete under the combined action of freeze-thaw cycle and prestress. 25 cycles, 50 cycles and 75 cycles of rapid freeze-thaw cycles were carried out on unbonded prestressed beams under σcon/fptk= 0.4, 0.6 and 0.8 prestressing conditions. The law of concrete strength loss under the combined action of freeze-thaw cycle and prestress is studied. The test results show that when the prestress reaches σcon/fptk= 0.8, the compressive strength of concrete under each freeze-thaw cycle is relatively close, and the freeze-thaw cycle has the least impact on the compressive strength of concrete. With the increase of freeze-thaw cycles, the loss of compressive strength of non prestressed concrete is much greater than that of prestressed concrete, and the greater the prestress, the slower the reduction of compressive strength.Prestress can inhibit the attenuation of concrete compressive strength under freeze-thaw cycle. With the increase of prestress, this inhibition is more obvious.Finally, according to the test results, the calculation model of compressive strength loss of concrete considering freeze-thaw cycle and prestress is established.
|
Published: 05 June 2022
Online: 2022-06-08
|
|
Fund:Open Fund of State Key Laboratory of Mountain Bridge and Tunnel Engineering(CQSLBF-Y14-13). |
|
|
1 孙科科,彭小芹,冉鹏,等.材料导报,2021,35(24),24106. 2 徐存东,高懿伟,程昱,等.混凝土,2019(11),29. 3 肖前慧,牛荻涛,朱文凭.武汉理工大学学报,2010,32(7),35. 4 Tian W, Gao F. Advances in Materials Science & Engineering, DOI:10.1155/2020/8032849. 5 Zhu X, Chen X, Zhang N, et al. Construction and Building Materials, 2021, 288, 123110. 6 Xu F,Wang S L,Li T,et al. Construction and Building Materials,2021,269, 121273. 7 王晓伟,王晓婷,刘品旭,等.土木工程与管理学报, 2017, 34(2),68. 8 赵燕茹,刘芳芳, 王磊,等. 建筑材料学报,2020, 23(6),1328. 9 薛翠真,申爱琴,乔宏霞.华南理工大学学报(自然科学版),2020,48(3),136. 10 魏毅萌,柴军瑞,覃源,等.硅酸盐通报,2018,37(3) ,825. 11 何晓雁,周曜,刘平源,等.建筑科学与工程学报,http://kns.cnki.net/kcms/detail/61.1442.TU.20211230.1013.004.html. 12 赵小明,王新科,乔宏霞,等.混凝土与水泥制品,2022(1),53. 13 吴小勇,周 凯,朱永帅,等.建筑结构学报,2021,42(s1),442. 14 黄奕霖,严武建,牛富俊.混凝土与水泥制品,2021(5),21. 15 冯忠居,郭穗柱,孟莹莹,等.哈尔滨工业大学学报,2021,53(9),69. 16 陈瑞明,向阳开,等.山东交通学院学报,2016,24(2),49. 17 中华人民共和国国家标准.GB/T20082—2009混凝土长期性能和耐久性性能试验方法标准, 中国建筑工业出版社,2009, pp.10. 18 周志祥,徐岳.高等钢筋混凝土结构, 人民交通出版社,2002, pp.22. 19 肖前慧,牛荻涛,等.建筑结构,2011,41(s2),203. |
|
|
|