冻融循环后高强高性能混凝土劈裂拉伸力学性能尺寸效应研究

doi:10.16552/j.cnki.issn1001-1625.2025.0385

摘要/Abstract

摘要： 为探究冻融循环后高强高性能混凝土抗拉力学性能尺寸效应,本文设计了五种冻融循环次数和三种尺寸,利用冻融循环设备和液压伺服机,结合数字图像相关(DIC)技术,对其开展冻融循环后劈裂拉伸力学性能试验,获取不同工况下高强高性能混凝土的劈裂拉伸力学性能参数,进而分析冻融循环次数和尺寸效应对其劈裂拉伸力学性能的影响规律。研究结果表明:随着冻融循环次数的增加,试件质量与相对动态弹性模量总体呈逐步下降趋势,试件的抗拉强度逐步下降;当冻融循环达到300次时,50、75、100 mm尺寸试件的抗拉强度降幅分别为15.11%、22.60%、27.20%。尺寸越大,冻融循环对混凝土抗拉强度降低的影响越显著。随着冻融循环次数增加,混凝土抗拉强度尺寸效应更为显著。根据经典的尺寸效应律模型,结合本文试验结果,提出了考虑冻融循环影响的高强高性能混凝土抗拉强度尺寸效应律模型。同时,应用DIC技术分析了冻融后混凝土损伤演化特征和裂缝扩展。研究成果为寒区高强高性能混凝土结构优化设计与安全评估提供了理论依据。

关键词: 高强高性能混凝土, 冻融循环, 尺寸效应, 劈裂拉伸, 数字图像相关技术, 损伤演化, 裂缝扩展

Abstract: To investigate the effect of freeze-thaw cycles on the tensile mechanical properties size effect of high-strength high-performance concrete, a study was conducted involving the design of five freeze-thaw cycles and three specimen sizes. Using a freeze-thaw cycle equipment, a hydraulic servo machine, and digital image correlation (DIC) technology, splitting tensile mechanical performance tests were carried out after freeze-thaw cycles, allowing for the acquisition of the splitting tensile mechanical performance parameters of high-strength high-performance concrete under varying conditions. The results indicate that, with an increase in the number of freeze-thaw cycles, a gradual decline is observed in both the mass of the specimens and the relative dynamic modulus of elasticity. A progressive decrease in the tensile strength of the specimens is also noted. After 300 freeze-thaw cycles, the tensile strength reductions for specimens of 50, 75, and 100 mm in size are 15.11%, 22.60%, and 27.20%, respectively. It is demonstrated that larger specimen sizes exhibited a more significant impact from freeze-thaw cycles on the tensile strength of concrete. Furthermore, it is found that, as the number of freeze-thaw cycles increases, the size effect on the tensile strength of the concrete becomes more pronounced. Based on the classical size effect law model and the experimental results obtained, a model is proposed that considers the influence of freeze-thaw cycles on the tensile strength size effect of high-strength high-performance concrete. In addition, DIC technology is employed to analyze the damage evolution characteristics and crack expansion of concrete after freeze-thaw cycles. The research findings provide a theoretical basis for the optimization design and safety assessment of high-strength high-performance concrete structures in cold regions.

Key words: high-strength high-performance concrete, freeze-thaw cycle, size effect, splitting tensile, digital image correlation technology, damage evolution, crack propagation

中图分类号:

TU528

金唐鱼, 彭帅, 余振鹏, 吴天乾. 冻融循环后高强高性能混凝土劈裂拉伸力学性能尺寸效应研究[J]. 硅酸盐通报, 2025, 44(10): 3609-3619.

JIN Tangyu, PENG Shuai, YU Zhenpeng, WU Tianqian. Size Effect on Splitting Tensile Performance of High-Strength High-Performance Concrete after Freeze-Thaw Cycles[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(10): 3609-3619.

参考文献

[1] 孙江涛, 吴定略, 曹亮宏, 等. 混合砂高强高性能混凝土性能研究[J]. 混凝土, 2019, 41(9): 146-149.
SUN J T, WU D L, CAO L H, et al. Study on the performance of the mixed sand high strength concrete[J]. Concrete, 2019, 41(9): 146-149 (in Chinese).
[2] 邓祥辉, 张鹏, 王睿, 等. 青藏高原地区纤维混凝土抗冻耐久性试验与损伤模型研究[J]. 硅酸盐通报, 2023, 42(9): 3143-3153.
DENG X H, ZHANG P, WANG R, et al. Frost resistance durability and damage model of fiber concrete in Xizang Plateau area[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(9): 3143-3153 (in Chinese).
[3] 向君正, 宋慧, 冷梦辉, 等. 透水混凝土冻融剥蚀成因分析[J]. 硅酸盐通报, 2021, 40(7): 2215-2224.
XIANG J Z, SONG H, LENG M H, et al. Cause analysis of freeze-thaw erosion of pervious concrete[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(7): 2215-2224 (in Chinese).
[4] 刘宏波, 贾小静, 张博洋, 等. 双掺石墨烯-氧化石墨烯再生粗骨料混凝土力学性能和抗冻耐久性研究[J]. 硅酸盐通报, 2024, 43(9): 3359-3367.
LIU H B, JIA X J, ZHANG B Y, et al. Mechanical properties and frost resistance durability of recycled coarse aggregate concrete dual doping graphene and oxide-graphene[J]. Bulletin of the Chinese Ceramic Society, 2024, 43(9): 3359-3367 (in Chinese).
[5] KARAKURT C, BAYAZIT Y. Freeze-thaw resistance of normal and high strength concretes produced with fly ash and silica fume[J]. Advances in Materials Science and Engineering, 2015, 2015(1): 830984.
[6] MA H X, YU H F, LI C, et al. Freeze-thaw damage to high-performance concrete with synthetic fibre and fly ash due to ethylene glycol deicer[J]. Construction and Building Materials, 2018, 187: 197-204.
[7] WANG R J, HU Z Y, LI Y, et al. Review on the deterioration and approaches to enhance the durability of concrete in the freeze-thaw environment[J]. Construction and Building Materials, 2022, 321: 126371.
[8] 冯博, 刘青, 钱永久. 高性能混凝土在氯盐侵蚀和冻融循环作用下的耐久性分析[J]. 西南交通大学学报, 2023, 58(5): 1083-1089.
FENG B, LIU Q, QIAN Y J. Durability analysis of high-performance concrete under chloride salt erosion and freeze-thaw cycles[J]. Journal of Southwest Jiaotong University, 2023, 58(5): 1083-1089 (in Chinese).
[9] LIU F, TANG R, MA W W, et al. Analysis on frost resistance and pore structure of phase change concrete modified by nano-SiO₂ under freeze-thaw cycles[J]. Measurement, 2024, 230: 114524.
[10] HUANG C H, NANTUNG T, FENG Y N, et al. Effect of colloidal nano silica on the freeze-thaw resistance and air void system of Portland cement concrete[J]. Journal of Building Engineering, 2024, 86: 108888.
[11] HEIDARI-RARANI M, ALIHA M R M, SHOKRIEH M M, et al. Mechanical durability of an optimized polymer concrete under various thermal cyclic loadings-an experimental study[J]. Construction and Building Materials, 2014, 64: 308-315.
[12] JIN L, FAN M Y, YU W X, et al. Effect of fibre content on low-temperature failure strength and toughness of different sized BFRC under static and dynamic loadings: an experimental study[J]. Engineering Fracture Mechanics, 2025, 314: 110737. [13] GUAN J F, LIU L, YAO X H, et al. Study on the strength size effect of wastewater concrete under freeze-thaw cycles[J]. Construction and Building Materials, 2024, 438: 137074.
[14] ZHANG M J, YU H F, GONG X, et al. Size effect on tensile strength of interface between coarse aggregate and mortar under freeze-thaw cycle[J]. Journal of Building Engineering, 2023, 75: 106939.
[15] DONG F Y, WANG H P, YU J T, et al. Effect of freeze-thaw cycling on mechanical properties of polyethylene fiber and steel fiber reinforced concrete[J]. Construction and Building Materials, 2021, 295: 123427.
[16] YU Z P, WU T Q, SUN X J, et al. Fracture mechanical properties and failure mechanism of high-performance concrete after freeze-thaw cycles[J]. Engineering Fracture Mechanics, 2025, 315: 110795.
[17] TANG T. Effects of load-distributed width on split tension of unnotched and notched cylindrical specimens[J]. Journal of Testing and Evaluation, 1994, 22(5): 401-409.
[18] WANG Y F, ZHANG J C, DU G F, et al. Synergistic effects of polypropylene fiber and basalt fiber on the mechanical properties of concrete incorporating fly ash ceramsite after freeze-thaw cycles[J]. Journal of Building Engineering, 2024, 91: 109593.
[19] 王月, 安明喆, 余自若, 等. 氯盐侵蚀与冻融循环耦合作用下C50高性能混凝土的耐久性研究[J]. 中国铁道科学, 2014, 35(3): 41-46.
WANG Y, AN M Z, YU Z R, et al. Durability of C50 high performance concrete under the coupled action of chloride salt erosion and freeze-thaw cycle[J]. China Railway Science, 2014, 35(3): 41-46 (in Chinese).
[20] CHEN B, CHEN J L, CHEN X D, et al. Experimental study on compressive strength and frost resistance of steam cured concrete with mineral admixtures[J]. Construction and Building Materials, 2022, 325: 126725.
[21] 王晨霞, 刘路, 曹芙波, 等. 冻融循环后再生混凝土力学性能试验研究[J]. 建筑结构学报, 2020, 41(12): 193-202.
WANG C X, LIU L, CAO F B, et al. Experimental study on mechanical properties of recycled concrete after freeze-thaw cycles[J]. Journal of Building Structures, 2020, 41(12): 193-202 (in Chinese).
[22] BAŽANT Z P, PLANAS J. Fracture and size effect in concrete and other quasibrittle materials[M]. London: Routledge, 2019.
[23] YU Z P, YANG Q, ZHANG J, et al. Research on uniaxial mechanical performance of high-performance concrete after high temperature rapid cooling and damage mechanism analysis[J]. Journal of Building Engineering, 2024, 86: 108921.