骨料界面效应下含初始缺陷再生混凝土弹性模量的均匀化预测

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (10): 3538-3545.

骨料界面效应下含初始缺陷再生混凝土弹性模量的均匀化预测

柴正一, 盛冬发, 秦飞飞, 霍晓伟

西南林业大学土木工程学院,昆明 650224

收稿日期:2023-06-13 修订日期:2023-07-26 出版日期:2023-10-15 发布日期:2023-10-17
通信作者: 盛冬发,博士,教授。E-mail:shengdf@swfu.edu.cn
作者简介:柴正一(1998—),男,硕士研究生。主要从事复合材料细观力学方向的研究。E-mail:czy2512143761@126.com
基金资助:
国家自然科学基金(11862023);云南省教育厅科学研究基金(2023Y0772,2023Y0774)

Homogenization Prediction of Elastic Modulus of Recycled Aggregate Concrete with Initial Defects under Aggregate Interface Effects

CHAI Zhengyi, SHENG Dongfa, QIN Feifei, HUO Xiaowei

College of Civil Engineering, Southwest Forestry University, Kunming 650224, China

Received:2023-06-13 Revised:2023-07-26 Online:2023-10-15 Published:2023-10-17

摘要/Abstract

摘要： 为了合理地设计和利用再生混凝土,在再生混凝土均匀化过程中,综合考虑原生骨料界面处较大的孔隙率、砂浆处的孔洞和微裂缝,以及骨料界面效应,同时结合扭转变形原理、Mori-Tanaka方法、微分法和Christensen三相模型,建立了一套可预测骨料界面效应下含初始缺陷再生混凝土弹性模量的模型。计算结果表明,当再生骨料取代率由0%增加到100%(质量分数)时,再生混凝土的弹性模量会降低24.4%,新水泥砂浆和原生骨料弹性模量的下降会导致再生混凝土的弹性模量出现不同程度的降低,预测模型能较好地预测界面效应下含初始缺陷再生混凝土弹性模量,并实现参数化分析。

关键词: 初始缺陷, 界面效应, 再生混凝土, 弹性模量, 均匀化方法, 三相模型

Abstract: In order to reasonably design and utilize recycled aggregate concrete, the larger porosity at the interface of primary aggregate, the pores and microcracks at the mortar and the aggregate interface effect were considered in the homogenization process of recycled aggregate concrete. A set of models that can predict the elastic modulus of recycled aggregate concrete with initial defects under aggregate interface effects was also developed by combining with the torsional deformation principle, Mori-Tanaka method, differential method and Christensen’s three-phase model. The calculation results show that with the increase of recycled aggregate replacement rate from 0% to 100% (mass fraction), the elastic modulus of recycled aggregate concrete decreases by 24.4%, and the decrease of elastic modulus of new mortar and primary aggregate also lead to the decrease the elastic modulus of recycled aggregate concrete by different degrees. The prediction model can better predict the elastic modulus of recycled aggregate concrete with initial defects under the interface effect, and realize parametric analysis.

Key words: initial defect, interface effect, recycled aggregate concrete, elastic modulus, homogenization method, three-phase model

中图分类号:

TU528

柴正一, 盛冬发, 秦飞飞, 霍晓伟. 骨料界面效应下含初始缺陷再生混凝土弹性模量的均匀化预测[J]. 硅酸盐通报, 2023, 42(10): 3538-3545.

CHAI Zhengyi, SHENG Dongfa, QIN Feifei, HUO Xiaowei. Homogenization Prediction of Elastic Modulus of Recycled Aggregate Concrete with Initial Defects under Aggregate Interface Effects[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(10): 3538-3545.

参考文献

[1] 肖建庄. 大有可为的再生混凝土[J]. 科技视界, 2022(9): 1-4.
XIAO J Z. Promising recycled concrete[J]. Science & Technology Vision, 2022(9): 1-4 (in Chinese).
[2] 王怀亮. 再生混凝土弹性模量的分析和计算[J]. 大连大学学报, 2013, 34(3): 45-49+71.
WANG H L. Study on elastic modulus of recycled aggregate concrete[J]. Journal of Dalian University, 2013, 34(3): 45-49+71 (in Chinese).
[3] 郑建军, 陈婷, 周欣竹, 等. 再生混凝土弹性模量的解析解[J]. 混凝土, 2019(3): 40-43.
ZHENG J J, CHEN T, ZHOU X Z, et al. Analytical solution for the elastic modulus of recycled concrete[J]. Concrete, 2019(3): 40-43 (in Chinese).
[4] 徐福卫, 田斌, 徐港. 再生混凝土界面过渡区定量分析[J]. 人民长江, 2020, 51(10): 177-181.
XU F W, TIAN B, XU G. Quantitative analysis of interface transition zone of recycled concrete[J]. Yangtze River, 2020, 51(10): 177-181 (in Chinese).
[5] 陈海玉, 徐福卫. 细观等效理论预测再生混凝土宏观力学参数[J]. 应用数学和力学, 2022, 43(7): 772-782.
CHEN H Y, XU F W. Prediction of the macroscopic mechanics properties of recycled aggregate concrete based on the mesoscopic equivalence theory[J]. Applied Mathematics and Mechanics, 2022, 43(7): 772-782 (in Chinese).
[6] 常熤存, 耿悦, 王玉银, 等. 基于两相复合材料的再生混凝土弹性模量预测模型[J]. 建筑结构学报, 2020, 41(12): 165-173.
CHANG Y C, GENG Y, WANG Y Y, et al. Models of elastic modulus for concrete made with recycled coarse aggregate based on two-phase composite material[J]. Journal of Building Structures, 2020, 41(12): 165-173 (in Chinese).
[7] 周静海, 何海进, 孟宪宏, 等. 再生混凝土基本力学性能试验[J]. 沈阳建筑大学学报(自然科学版), 2010, 26(3): 464-468.
ZHOU J H, HE H J, MENG X H, et al. Basic mechanical properties of recycled concrete experimental study[J]. Journal of Shenyang Jianzhu University (Natural Science), 2010, 26(3): 464-468 (in Chinese).
[8] 张剑波, 吴勇生, 孙可伟, 等. 再生骨料混凝土孔隙结构的试验研究[J]. 硅酸盐通报, 2011, 30(1): 239-244.
ZHANG J B, WU Y S, SUN K W, et al. Experiment and study on pore structure of recycled aggregate concrete[J]. Bulletin of the Chinese Ceramic Society, 2011, 30(1): 239-244 (in Chinese).
[9] 张志沛, 朱文清, 李可飞, 等. 不同初始缺陷再生混凝土渗透性能及其强度试验研究[J]. 混凝土, 2022(11): 23-26+31.
ZHANG Z P, ZHU W Q, LI K F, et al. Experimental study on permeability and strength of recycled concrete with different initial defects[J]. Concrete, 2022(11): 23-26+31 (in Chinese).
[10] 郭嘉, 高嵩, 班顺莉, 等. 再生混凝土单轴受压下多重界面过渡区的破坏机理研究[J]. 硅酸盐通报, 2022, 41(10): 3445-3457.
GUO J, GAO S, BAN S L, et al. Failure mechanism of multi-interfacial transition zones of recycled concrete under uniaxial compression[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(10): 3445-3457 (in Chinese).
[11] 李瑶, 黄茗, 姜挺, 等. 基于细微观结构的再生混凝土力学性能研究[J]. 混凝土, 2022(8): 67-70.
LI Y, HUANG M, JIANG T, et al. Study on mechanical properties of recycled concrete based on micro-structure[J]. Concrete, 2022(8): 67-70 (in Chinese).
[12] 刘茂军, 王根伟, 许国平, 等. 基于声发射技术的再生混凝土破坏机理细观研究[J]. 新型建筑材料, 2016, 43(5): 66-71.
LIU M J, WANG G W, XU G P, et al. Research on the failure mechanism of recycled concrete at the mesoscopic level based on acoustic emission technique[J]. New Building Materials, 2016, 43(5): 66-71 (in Chinese).
[13] 张亚飞, 安新正, 牛薇, 等. 基于检测方法的再生混凝土弹性模量试验研究[J]. 河北工程大学学报(自然科学版), 2019, 36(1): 41-45.
ZHANG Y F, AN X Z, NIU W, et al. Experimental study on elastic modulus of recycled concrete based on detection method[J]. Journal of Hebei University of Engineering (Natural Science Edition), 2019, 36(1): 41-45 (in Chinese).
[14] BENVENISTE Y. A new approach to the application of Mori-Tanaka’s theory in composite materials[J]. Mechanics of Materials, 1987, 6(2): 147-157.
[15] MORI T, TANAKA K. Average stress in matrix and average elastic energy of materials with misfitting inclusions[J]. Acta Metallurgica, 1973, 21(5): 571-574.
[16] CHRISTENSEN R M, LO K H. Solutions for effective shear properties in three phase sphere and cylinder models[J]. Journal of the Mechanics and Physics of Solids, 1979, 27(4): 315-330.
[17] 刘琼. 再生混凝土破坏机理的试验研究和格构数值模拟[D]. 上海: 同济大学, 2010.
LIU Q. Experimental study on failure mechanism of recycled concrete and lattice numerical simulation[D]. Shanghai: Tongji University, 2010 (in Chinese).