•  
  •  
 

Corresponding Author

罗滋润，男，硕士.E-mail：2869994398@qq.com

Abstract

Determining the free shrinkage of U HPC is an important basis for analyzing the shrinkage effect of steel UHPC composite bridge deck.Therefore，based on the UHPC materials to be used in a project，three batches of UHPC free shrinkage specimens were made，and three specimens were made in each batch.By testing the strain and temperature of specimens during curing，the free shrinkage strain-age curve and temperature-age curve of UHPC were obtained.The development and variation law of UHPC shrinkage strain are discussed.Based on the experimental results，the equivalent time is introduced on the basis of Arrhenius empirical formula，and a modified model of free shrinkage is proposed.Finally，based on the regression analysis of the test results，the coefficients of the modified model are obtained.According to this discussion，the corresponding theoretical UHPC shrinkage stress calculate formula is obtained.The results show that the shrinkage from time zero to the point that temperature rise to 90 ℃ accounts about 42% of the total shrinkage during steam curing，and then the free shrinkage developed to more than 95% of the total shrinkage during steam curing within 48 hours after steam curing with 90 ℃.and the shrinkage strain curve will gradually stabilize during this period.And under the equivalent sealing curing condition of 20 ℃，the free shrinkage of UHPC will be basically completed about 40 days after time zero.

Publication Date

12-17-2024

DOI

10.14048/j.issn.1671-2579.2024.06.009

First Page

90

Last Page

97

Submission Date

February 2025

Reference

[1]李良 ,钟镇鸿 ,周志成 ,等.超高性能混凝土 UHPC力学性能及应用介绍 [J].混凝土世界 ,2018 (9):56-62.LI Liang ,ZHONG Zhenhong ,ZHOU Zhicheng ,et al .The mechanical properties and applications of ultra-high performance concrete [J].China Concrete ,2018 (9):56-62.
[2]张杰，蔺鹏臻 .UHPC加固钢筋混凝土简支梁后可靠度分析[J].中外公路 ，2023 ,43（5） ：72-77.ZHANG Jie ，LIN Pengzhen .Reliability analysis of RC simply supported beams strengthened by UHPC [J].Journal of China & Foreign Highway ,2023，43(5):72-77.
[3]YOO D Y ,SHIN H O ,LEE J Y ,et al .Enhancing cracking resistance of ultra-high-performance concrete slabs using steel fibres [J].Magazine of Concrete Research ,2015 ,67(10):487-495.
[4]YOO D Y ,BANTHIA N ,YOON Y S .Effectiveness of shrinkage-reducing admixture in reducing autogenous shrinkage stress of ultra-high-performance fiber-reinforced concrete [J].Cement and Concrete Composites ,2015 ,64:27-36.
[5]聂建国 .我国结构工程的未来 :高性能结构工程 [J].土木工程学报 ,2016 ,49(9):1-8.NIE Jianguo .The future of structural engineering in China :High-performance structural engineering [J].China Civil Engineering Journal ,2016 ,49(9):1-8.
[6]邵旭东 ,樊伟 ,黄政宇 .超高性能混凝土在结构中的应用[J].土木工程学报 ,2021 ,54(1):1-13.SHAO Xudong ,FAN Wei ,HUANG Zhengyu .Application of ultra-high-performance concrete in engineering structures [J].China Civil Engineering Journal ,2021 ,54(1):1-13.
[7]李传习 ,周佳乐 ,柯璐 ,等.配筋 UHPC矩形梁抗扭承载性能试验与计算方法 [J].中国公路学报 ,2021 ,34(8):118-131.LI Chuanxi ,ZHOU Jiale ,KE Lu ,et al .Experimental investigation and calculation of the torsional capacity of reinforced UHPC rectangle beams [J].China Journal of Highway and Transport ,2021 ,34(8):118-131.
[8]李传习 ,聂洁 ,潘仁胜 ,等.水胶比对超高性能混凝土施工与力学性能的影响 [J].土木与环境工程学报 (中英文 ),2020 ,42(4):164-174.LI Chuanxi ,NIE Jie ,PAN Rensheng ,et al .Effect of water-to-binder ratio on construction and mechanical properties of ultra-high performance concrete [J].Journal of Civil and Environmental Engineering ,2020 ,42(4):164-174.
[9]冉国建 ,姜怡林 ,吴昊南 ,等.养护方式对混凝土收缩性能的影响 [C]//2021年工业建筑学术交流会论文集 (下册 ).北京 ,2021 :838-841,937.RAN Guojian ,JIANG Yilin ,WU Haonan ,et al .Effect of curing method on the shrinkage performance of concrete[C]//2021 Industrial Building Academic Exchange .Beijing ,2021 :838-841,937.
[10]徐翔波 ,于泳 ,金祖权 ,等.养护制度对超高性能混凝土微观结构和力学性能影响的研究综述 [J].硅酸盐通报 ,2021 ,40(9):2856 -2870 .XU Xiangbo ,YU Yong ,JIN Zuquan ,et al .Review on effects of microstructure and mechanical properties of ultra-high performance concrete by curing regimes [J].Bulletin of the Chinese Ceramic Society ,2021 ,40(9):2856 -2870 .
[11]李家和 ,刘铁军 ,欧进萍 .高性能混凝土的自收缩与干燥收缩 [C]//中国土木工程学会高强与高性能混凝土委员会第五届学术讨论会 ,2004 .LI Jiahe ,LIU Tiejun ,OU Jinping .Self-shrinkage and dry shrinkage of high performance concrete [C]//The fifth Symposium of High Strength and High Performance Concrete Committee of China Civil Engineering Society ,2004 .
[12]陈宝春 ,李聪 ,黄伟 ,等.超高性能混凝土收缩综述 [J].交通运输工程学报 ,2018 ,18(1):13-28.CHEN Baochun ,LI Cong ,HUANG Wei ,et al .Review of ultra-high performance concrete shrinkage [J].Journal of Traffic and Transportation Engineering ,2018 ,18(1):13-28.
[13]刘丹 .不同养护制度下活性粉末混凝土早期收缩的模型研究 [D].北京 :北京交通大学 ,2017 .LIU Dan .Research on the early shrinkage-age model of reactive powder concrete in different curing conditions [D].Beijing :Beijing Jiaotong University ,2017 .
[14]罗霞 ,韦建刚 ,李聪 ,等.密闭条件下 UHPC的收缩性能试验研究 [J].应用基础与工程科学学报 ,2018 ,26(4):830-842.LUO Xia ,WEI Jiangang ,LI Cong ,et al .Experimental investigations of the shrinkage behavior of sealed UHPC[J].Journal of Basic Science and Engineering ,2018 ,26(4):830-842.
[15]TAZAWA E ,MIYAZAWA S .Effect of constituents and curing condition on autogenous shrinkage of concrete [C]//Proc .of Int .Workshop ,London :E& FN Spon ,1998 :269-280.
[16]KORDINA K R ,MANCINI G ,SCHÄFER K ,et al .Structural Concrete Textbook on behaviour ,design and performance (Second edition Volume 4) [M].fib.The International Federation for Structural Concrete ,2010 .
[17]赵辛玮，肖汝诚，孙斌，等.常温养护型超高性能混凝土组合桥面板收缩性能研究 [J].中外公路 ，2020，40（3）：100-107.ZHAO Xinwei ,XIAO Rucheng ,SUN Bin ,et al .Study on shrinkage performance of composite bridge deck with ultra-high performance concrete cured in normal temperature [J].Journal of China & Foreign Highway ,2020，40(3):100-107.
[18]ACI Committee 209.Prediction of creep ,shrinkage and temperature effect in concrete structures [R].Detroit :ACI,1992 .
[19]DILGER W H ,WANG C .Creep and shrinkage of high-performance concrete [C]//SP- 194:The Adam Neville Symposium :Creep and Shrinkage-Structural Design Effects .American Concrete Institute ,2000 .
[20]刘泰松 .活性粉末混凝土的收缩理论和试验研究 [D].北京:北京交通大学 ,2008 .LIU Taisong .Study of reactive powder concrete shrinkage theory and experimental research [D].Beijing :Beijing Jiaotong University ,2008 .
[21]YOO D Y ,KIM S ,KIM M J .Comparative shrinkage behavior of ultra-high-performance fiber-reinforced concrete under ambient and heat curing conditions [J].Construction and Building Materials ,2018 ,162:406-419.
[22]李传习 ,方昌乐 ,张永明 ,等.新型组合桥面板 UHPC收缩效应足尺试验 [J].中国公路学报 ,2023 ,36(6):94-106.LI Chuanxi ,FANG Changle ,ZHANG Yongming ,et al .Full-scale experiment on UHPC shrinkage effect of innovative composite bridge deck [J].China Journal of Highway and Transport ,2023 ,36(6):94-106.
[23]清华大学 .活性粉末混凝土 :GB/T 31387—2015 [S].北京 :中国标准出版社 ,2015 .Tsinghua University .Reactive powder concrete :GB/T 31387—2015 [S].Beijing :Standards Press of China ,2015 .
[24]清华大学 ，江西贝融循环材料股份有限公司 ，南京倍立达新材料系统工程股份有限公司 .超高性能混凝土基本性能试验与方法 :T/CBMF 37—2018 [S].北京 :中国建材工业出版社 ,2018 .Tsinghua University ,Jiangxi Beirong Recycling Materials Co.,Ltd.,Nanjing Beilida New Materials System Engineering Co .,Ltd..Fundamental characteristics and testmethods of ultra-high performance concrete :T/CBMF 37—2018 [S].Beijing :China Building Materials Press ,2018 .
[25]鲁亚 ,闵洋洋 ,刘华明 ,等.超高性能混凝土 (UHPC )的收缩测试方法研究 [J].混凝土世界 ,2020 (6):50-54.LU Ya ,MIN Yangyang ,LIU Huaming ,et al .Study on shrinkage testing method of ultra-high performance concrete (UHPC )[J].China Concrete ,2020 (6):50-54.
[26]中华人民共和国住房和城乡建设部 .普通混凝土长期性能和耐久性能试验方法标准 :GB/T 50082—2009 [S].北京:中国建筑工业出版社 ,2010 .Ministry of Housing and Urban-Rural Development of the People’s Republic of China .Standard for test methods of long-term performance and durability of ordinary concrete :GB/T 50082—2009 [S].Beijing :China Architecture & Building Press ,2010
[27]大连理工大学 .纤维混凝土试验方法标准 :CCES 13:2009 [S].北京 :中国计划出版社 ,2009 .Dalian University of Technology .Standard test methods for fiber reinforced concrete :CCES 13:2009 [S].Beijing :China Academy of Building Research ,2009 .
[28]黄政宇 ,胡功球 .热养护过程中超高性能混凝土的收缩性能研究 [J].材料导报 ,2016 ,30(4):115-120.HUANG Zhengyu ,HU Gongqiu .Research on the shrinkage performance of ultra high performance concrete during heat curing [J].Materials Review ,2016 ,30(4):115-120.
[29]HASHIDA H ,YAMAZAKI N .A study on composed deformation of autogenous shrinkage and thermal expansion due to heat of hydration in high-strength concrete [J].Concrete Research and Technology ,2002 ,13(1):25-32.
[30]BFUP AFGC .Ultra high performance fibre-reinforcedconcretes recommandations [S].France :AFGC Working Group ,2013 .
[31]TAZAWA E I .Autogenous shrinkage of concrete [M].London :E&F N Spon ,1999 .
[32]INTERNATIONAL A .Standard practice for estimating concrete strength by the maturity method [S].ASTM ,2011 .

Download

Share

COinS