长龄期自密实混凝土与普通混凝土强度及弹性模量对比试验研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (10): 3530-3537.

长龄期自密实混凝土与普通混凝土强度及弹性模量对比试验研究

贠建洲¹, 陈顺超¹, 董春彦¹, 王磊², 聂良鹏³

1.西南林业大学土木工程学院,昆明 650224;
2.苏交科集团检测认证有限公司云南分公司,昆明 650224;
3.云南通衢工程检测有限公司,昆明 650224

收稿日期:2023-06-07 修订日期:2023-07-03 出版日期:2023-10-15 发布日期:2023-10-17
通信作者: 陈顺超,博士,副教授。E-mail:410106781@qq.com
作者简介:贠建洲(1998—),男,硕士研究生。主要从事桥梁检测与加固的研究。E-mail:yunjianzhou2022@163.com
基金资助:
云南省交通运输厅科技项目(云交科教便[2020]91号)

Comparative Experimental Study on Strength and Elastic Modulus of Long Age Self-Compacting Concrete and Normal Concrete

YUN Jianzhou¹, CHEN Shunchao¹, DONG Chunyan¹, WANG Lei², NIE Liangpeng³

1. College of Civil Engineering, Southwest Forestry University, Kunming 650224, China;
2. Yunnan Branch of Sujiaoke Group Testing and Certification Co., Ltd., Kunming 650224, China;
3. Yunnan Tongqu Engineering Testing Co., Ltd., Kunming 650224, China

Received:2023-06-07 Revised:2023-07-03 Online:2023-10-15 Published:2023-10-17

摘要/Abstract

摘要： 为了研究不同龄期下自密实混凝土(SCC)与普通混凝土(NC)试件抗压强度、劈裂抗拉强度、弹性模量的发展规律和差异,设计并浇筑了8组不同龄期(3、7、14、28、56、120、200、400 d)下的SCC与NC试件(强度等级均为C40),测试不同龄期下SCC、NC立方体抗压强度、棱柱体抗压强度、劈裂抗拉强度和弹性模量。根据试验结果对比分析不同龄期下两种混凝土力学参数的发展规律与差异。结果表明,长龄期下两种混凝土抗压强度、劈裂抗拉强度、弹性模量发展规律近似,均为早期(28 d以前)增长较快,后期(200 d以后)增长缓慢且趋于稳定。同强度等级下的SCC抗压强度及劈裂抗拉强度大于NC,弹性模量小于NC。长龄期(400 d以后)下SCC抗压强度比NC高25%左右,劈裂抗拉强度比NC高9%左右,弹性模量比NC小8%左右。NC实测弹性模量与规范公式计算值较吻合,SCC实测弹性模量大约为规范公式计算值的85.9%,采用NC弹性模量规范计算公式预测SCC弹性模量时需乘0.859进行修正。

关键词: 自密实混凝土, 普通混凝土, 抗压强度, 劈裂抗拉强度, 弹性模量

Abstract: In order to study the development patterns and differences in compressive strength, splitting tensile strength, and elastic modulus of self-compacting concrete (SCC) and normal concrete (NC) specimens at different ages, eight groups of SCC and NC specimens were designed and poured at different ages (3, 7, 14, 28, 56, 120, 200, 400 d) with strength class C40, and the cube compressive strength, prism compressive strength, splitting tensile strength and elastic modulus of SCC and NC were tested at different ages. According to the test results, the development laws and differences of the two kinds of concrete mechanical parameters at different ages were compared and analysed. The results show that the compressive strength, splitting tensile strength and elastic modulus of the two types of concrete have similar development law at long ages, with rapid growth in early stage (before 28 d) and slow and stable growth in later stage (after 200 d). The compressive strength and splitting tensile strength of SCC at the same strength level are greater than NC, and the elastic modulus is smaller than NC. The compressive strength of SCC is about 25% higher than NC, the splitting tensile strength is about 9% higher than NC, and the elastic modulus is about 8% smaller than NC at long age (after 400 d). The measured elastic modulus of NC is in good agreement with the calculated elastic modulus of specification formula, and the measured elastic modulus of SCC is about 85.9% of calculated elastic modulus of specification formula. If the NC elastic modulus formula is used to predict SCC elastic modulus, the correction should be multiplied by 0.859.

Key words: self-compacting concrete, normal concrete, compressive strength, splitting tensile strength, elastic modulus

中图分类号:

TU528

贠建洲, 陈顺超, 董春彦, 王磊, 聂良鹏. 长龄期自密实混凝土与普通混凝土强度及弹性模量对比试验研究[J]. 硅酸盐通报, 2023, 42(10): 3530-3537.

YUN Jianzhou, CHEN Shunchao, DONG Chunyan, WANG Lei, NIE Liangpeng. Comparative Experimental Study on Strength and Elastic Modulus of Long Age Self-Compacting Concrete and Normal Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(10): 3530-3537.

参考文献

[1] OKAMURA H O. Self-compacting high-performance concrete[J]. Concrete International, 1997, 19(7): 50-54.
[2] PERSSON B. A comparison between mechanical properties of self-compacting concrete and the corresponding properties of normal concrete[J]. Cement and Concrete Research, 2001, 31(2): 193-198.
[3] FELEKOĞLU B, TÜRKEL S, BARADAN B. Effect of water/cement ratio on the fresh and hardened properties of self-compacting concrete[J]. Building and Environment, 2007, 42(4): 1795-1802.
[4] ALMEIDA F F M, BARRAGÁN B E, CASAS J R, et al. Hardened properties of self-compacting concrete: a statistical approach[J]. Construction and Building Materials, 2010, 24(9): 1608-1615.
[5] 杨树桐, 吴智敏. 自密实混凝土力学性能的试验研究[J]. 混凝土, 2005(1): 33-36+39.
YANG S T, WU Z M. Experimental study on the mechanical performance of self-compacting concrete[J]. Concrete, 2005(1): 33-36+39 (in Chinese).
[6] 胡琼, 颜伟华, 郑文忠. 自密实混凝土基本力学性能试验研究[J]. 工业建筑, 2008, 38(10): 90-93.
HU Q, YAN W H, ZHENG W Z. Experimental research on mechanical property of self-compacting concrete[J]. Industrial Construction, 2008, 38(10): 90-93 (in Chinese).
[7] 黄维蓉, 刘贞鹏, 张忠明, 等. 自密实混凝土的特点及性能研究综述[J]. 混凝土, 2014(1): 108-110.
HUANG W R, LIU Z P, ZHANG Z M, et al. Summary of research on the characteristic and property of self-compacting concrete[J]. Concrete, 2014(1): 108-110 (in Chinese).
[8] 李玉龙. 掺机制砂C50自密实混凝土设计及应用[J]. 建筑结构, 2022, 52(3): 19-22+29.
LI Y L. Design and application of C50 self-compacting concrete with machine-made sand[J]. Building Structure, 2022, 52(3): 19-22+29 (in Chinese).
[9] 张淑云, 王恩, 周杰, 等. 骨料对自密实混凝土工作性能和力学性能的影响[J]. 中国科技论文, 2022, 17(4): 437-443.
ZHANG S Y, WANG E, ZHOU J, et al. The influence of aggregate on the working performance and mechanical properties of self-compacting concrete[J]. China Sciencepaper, 2022, 17(4): 437-443 (in Chinese).
[10] 伊庆刚, 琚花花, 张启志. 再生骨料自密实混凝土力学与长期性能研究[J]. 建筑结构, 2023, 53(12): 87-90+86.
YI Q G, JU H H, ZHANG Q Z. Research on mechanical and long-term performance of recycled aggregate self-compacting concrete[J]. Building Structure, 2023, 53(12): 87-90+86 (in Chinese).
[11] LI J J, NIU J G, WAN C J, et al. Comparison of flexural property between high performance polypropylene fiber reinforced lightweight aggregate concrete and steel fiber reinforced lightweight aggregate concrete[J]. Construction and Building Materials, 2017, 157: 729-736.
[12] 海然, 刘盼, 杨艳蒙, 等. 钢纤维增强粉煤灰自密实混凝土力学性能[J]. 建筑材料学报, 2021, 24(1): 87-92.
HAI R, LIU P, YANG Y M, et al. Mechanical properties of steel fiber reinforced fly ash self-compacting concrete[J]. Journal of Building Materials, 2021, 24(1): 87-92 (in Chinese).
[13] CHOLKER A K, AHMAD TANTRAY M. Mechanical and durability properties of self-compacting concrete reinforced with carbon fibers[J]. International Journal of Recent Technology and Engineering (IJRTE), 2019, 7(6): 1738-1743.
[14] 中华人民共和国住房和城乡建设部. 自密实混凝土应用技术规程: JGJ/T 283—2012[S]. 北京: 中国建筑工业出版社, 2012.
Ministry of Housing and Urban-Rural Development of the People’s Republic of China. Technical specification for application of self-compacting concrete: JGJ/T 283—2012[S]. Beijing: China Construction Industry Press, 2012 (in Chinese).
[15] 中华人民共和国交通部. 公路工程水泥及水泥混凝土试验规程: JTG 3420—2020[S]. 北京: 人民交通出版社, 2020.
Ministry of Communications of the People’s Republic of China. Testing methods of cement and concrete for highway engineering: JTG 3420—2020[S]. Beijing: People’s Traffic Press, 2020 (in Chinese).
[16] 梁兴文, 史庆轩. 混凝土结构设计原理[M]. 2版. 北京: 中国建筑工业出版社, 2011.
LIANG X W, SHI Q X. Concrete structure design principle[M]. 2nd ed. Beijing: China Construction Industry Press, 2011 (in Chinese).
[17] 谢友均, 周士琼, 尹健, 等. 免振高性能混凝土力学性能及耐久性研究[J]. 建筑材料学报, 2000, 3(2): 118-123.
XIE Y J, ZHOU S Q, YIN J, et al. Study on mechanical properties and durability of self-compacting high performance concrete[J]. Journal of Building Materials, 2000, 3(2): 118-123 (in Chinese).
[18] 李化建, 黄法礼, 谭盐宾, 等. 自密实混凝土力学性能研究[J]. 硅酸盐通报, 2016, 35(5): 1343-1348.
LI H J, HUANG F L, TAN Y B, et al. Mechanical properties of self-compacting concrete[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(5): 1343-1348 (in Chinese).
[19] DOMONE P L. A review of the hardened mechanical properties of self-compacting concrete[J]. Cement and Concrete Composites, 2007, 29(1): 1-12.
[20] 中国土木工程协会标准. 自密实混凝土设计与施工指南: CCES 02—2004[S]. 北京: 中国建筑工业出版社, 2005.
China Civil Engineering Association standard. Guide to design and construction of self-compacting concrete: CCES 02—2004[S]. Beijing: China Architecture and Construction Press, 2005 (in Chinese).
[21] 潘志宏. 自密实高性能混凝土配比优化及制备技术研究[D]. 长沙: 中南大学, 2004.
PAN Z H. Optimization of self-compacting high performance concrete proportioning and preparation technology[D]. Changsha: Central South University, 2004 (in Chinese).
[22] 刘运华. 自密实混凝土制备原理与应用技术[D]. 长沙: 中南大学, 2008.
LIU Y H. Self-compacting concrete preparation principle and application technology[D]. Changsha: Central South University, 2008 (in Chinese).