冻融环境下泡沫混凝土的单轴压缩特性

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (4): 1233-1241.

所属专题：水泥混凝土

冻融环境下泡沫混凝土的单轴压缩特性

周程涛^1,2, 陈波^1,2, 高志涵^1,2

1.河海大学,水利水电学院,南京 210098;
2.河海大学,水文水资源与水利工程科学国家重点实验室,南京 210098

收稿日期:2022-10-14 修订日期:2022-12-31 出版日期:2023-04-15 发布日期:2023-04-25
通信作者: 陈波,博士,教授。E-mail:chenbohhu@126.com
作者简介:周程涛(1999—),男,硕士研究生。主要从事水工混凝土新材料的研究。E-mail:zhouchengtao@hhu.edu.cn
基金资助:
国家自然科学基金面上项目(52079049);国家自然科学基金重点项目(51739003);国家重点实验室基本科研业务费(522012272)

Uniaxial Compression Characteristics of Foamed Concrete under Freeze-Thaw Environment

ZHOU Chengtao^1,2, CHEN Bo^1,2, GAO Zhihan^1,2

1. College of Water-Conservancy and Hydropower, Hohai University, Nanjing 210098, China;
2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China

Received:2022-10-14 Revised:2022-12-31 Online:2023-04-15 Published:2023-04-25

摘要/Abstract

摘要： 为了解冻融环境下泡沫混凝土的单轴压缩特性,分别对4种密度(500、600、800和1 000 kg/m³)的泡沫混凝土进行了变加载速率(10~100 N/s)的试验研究,并基于X-CT重构了冻融环境下泡沫混凝土的孔隙结构模型。在此基础上,研究了单轴压缩过程荷载-位移曲线的特征及其影响因素,并借助回归分析和灰关联理论分析了泡沫混凝土密度、冻融循环次数及加载速率与抗压强度的关联程度。结果表明:冻融循环后泡沫混凝土单轴压缩过程荷载-位移曲线的切线模量大幅减小,非线性特征加强;冻融循环后试件孔隙率增大,孔径分布离散化程度加强。冻融环境下泡沫混凝土抗压强度与密度等级之间始终保持指数关系,相关系数均在0.9以上;泡沫混凝土密度等级与抗压强度联系最为紧密,其次是冻融循环次数和加载速率,灰关联度均在0.65以上。

关键词: 泡沫混凝土, 单轴压缩, 密度等级, 冻融循环, 荷载-位移曲线, 孔隙结构, 灰关联理论

Abstract: In order to study the uniaxial compression characteristics of foamed concrete under freeze-thaw environment, foamed concrete with four kinds of densities (500, 600, 800 and 1 000 kg/m³) were studied with different loading rates (10~100 N/s). Moreover, the pore structure model of foamed concrete under freeze-thaw environment were illustrated by using X-CT. The characteristics and influencing factors of load-displacement curves in the uniaxial compression process were studied, and the relational degrees among the density, freeze-thaw cycles, loading rate and compressive strength of foamed concrete were analyzed utilizing the regression analysis and grey relational theory. The results show that the tangent modulus of load-displacement curve of foamed concrete is reduced greatly and the nonlinear characteristics are enhanced in the uniaxial compression process after freeze-thaw cycles. Besides, the porosity of specimen increases after freeze-thaw cycles, and the discretization of pore size distribution increases. There remains an exponential relationship between compressive strength and density grade of foamed concrete under freeze-thaw environment, and the correlation coefficients are all above 0.9. According to the grey relational theory, the density grade of foamed concrete is more related to the compressive strength than freeze-thaw cycles and loading rate, and the grey relational degrees are all above 0.65.

Key words: foamed concrete, uniaxial compression, density grade, freeze-thaw cycle, load-displacement curve, pore structure, grey relational theory

中图分类号:

TU528.2

周程涛, 陈波, 高志涵. 冻融环境下泡沫混凝土的单轴压缩特性[J]. 硅酸盐通报, 2023, 42(4): 1233-1241.

ZHOU Chengtao, CHEN Bo, GAO Zhihan. Uniaxial Compression Characteristics of Foamed Concrete under Freeze-Thaw Environment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(4): 1233-1241.

参考文献

[1] 宋强, 张鹏, 鲍玖文, 等. 泡沫混凝土的研究进展与应用[J]. 硅酸盐学报, 2021, 49(2): 398-410.
SONG Q, ZHANG P, BAO J W, et al. Research progress and application of foam concrete[J]. Journal of the Chinese Ceramic Society, 2021, 49(2): 398-410 (in Chinese).
[2] 周明杰, 王娜娜, 赵晓艳, 等. 泡沫混凝土的研究和应用最新进展[J]. 混凝土, 2009(4): 104-107.
ZHOU M J, WANG N N, ZHAO X Y, et al. Latest development of research and application on foam concrete[J]. Concrete, 2009(4): 104-107 (in Chinese).
[3] 张亚梅, 孙超, 王申, 等. 不同密度等级泡沫混凝土的性能和孔结构[J]. 重庆大学学报, 2020, 43(8): 54-63.
ZHANG Y M, SUN C, WANG S, et al. Properties and pore structure of foam concrete with different density[J]. Journal of Chongqing University, 2020, 43(8): 54-63 (in Chinese).
[4] 龙文武. 泡沫混凝土力学性能及其数值模拟[D]. 衡阳: 南华大学, 2016.
LONG W W. Mechanical properties of foamed concrete and its numerical simulation[D]. Hengyang: University of South China, 2016 (in Chinese).
[5] 周顺鄂, 卢忠远, 焦雷, 等. 泡沫混凝土压缩特性及抗压强度模型[J]. 武汉理工大学学报, 2010, 32(11): 9-13.
ZHOU S E, LU Z Y, JIAO L, et al. Compression property and compression strength model of foamed concrete[J]. Journal of Wuhan University of Technology, 2010, 32(11): 9-13 (in Chinese).
[6] 周宏元, 王业斌, 王小娟, 等. 泡沫混凝土压缩性能尺寸效应研究[J]. 材料导报, 2021, 35(18): 18076-18082+18095.
ZHOU H Y, WANG Y B, WANG X J, et al. Size effect of foam concrete subjected to quasi-static compression[J]. Materials Reports, 2021, 35(18): 18076-18082+18095 (in Chinese).
[7] 吴森宝, 宗琦, 王军国, 等. 低温下泡沫混凝土的动态力学性能[J]. 硅酸盐通报, 2022, 41(1): 76-87.
WU S B, ZONG Q, WANG J G, et al. Dynamic mechanical properties of foamed concrete at low temperature[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(1): 76-87 (in Chinese).
[8] 段桂珍, 方从启. 混凝土冻融破坏研究进展与新思考[J]. 混凝土, 2013(5): 16-20.
DUAN G Z, FANG C Q. Research progress and new thinking of destruction of concrete due to freeze-thaw cycles[J]. Concrete, 2013(5): 16-20 (in Chinese).
[9] 邹超英, 赵娟, 梁锋, 等. 冻融作用后混凝土力学性能的衰减规律[J]. 建筑结构学报, 2008, 29(1): 117-123+138.
ZOU C Y, ZHAO J, LIANG F, et al. Degradation of mechanical properties of concrete caused by freeze-thaw action[J]. Journal of Building Structures, 2008, 29(1): 117-123+138 (in Chinese).
[10] TIKALSKY P J, POSPISIL J, MACDONALD W. A method for assessment of the freeze-thaw resistance of preformed foam cellular concrete[J]. Cement and Concrete Research, 2004, 34(5): 889-893.
[11] 龚建清, 杨倩, 郭丽, 等. 碱激发矿渣-玻璃粉基泡沫混凝土性能研究[J]. 硅酸盐通报, 2022, 41(1): 226-234.
GONG J Q, YANG Q, GUO L, et al. Performance of alkali-activated slag-glass powder based foamed concrete[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(1): 226-234 (in Chinese).
[12] 叶林杰, 夏新华, 吴迪高, 等. 基于冻融循环和疲劳荷载共同作用下泡沫混凝土的微观力学性能研究[J]. 混凝土, 2022(9): 56-61.
YE L J, XIA X H, WU D G, et al. Study on the micro-mechanical properties of foam concrete under the combination of freeze-thaw cycle and fatigue load[J]. Concrete, 2022(9): 56-61 (in Chinese).
[13] 李升涛, 陈徐东, 张锦华, 等. 不同密度等级泡沫混凝土的单轴压缩破坏特征[J]. 建筑材料学报, 2021, 24(6): 1146-1153.
LI S T, CHEN X D, ZHANG J H, et al. Failure characteristics of foam concrete with different density under uniaxial compression[J]. Journal of Building Materials, 2021, 24(6): 1146-1153 (in Chinese).
[14] 李金玉, 曹建国, 徐文雨, 等. 混凝土冻融破坏机理的研究[J]. 水利学报, 1999, 30(1): 41-49.
LI J Y, CAO J G, XU W Y, et al. Stydy on the mechanism of concrete destruction under frost action[J]. Journal of Hydraulic Engineering, 1999, 30(1): 41-49 (in Chinese).
[15] 庞超明, 王少华. 泡沫混凝土孔结构的表征及其对性能的影响[J]. 建筑材料学报, 2017, 20(1): 93-98.
PANG C M, WANG S H. Void characterization and effect on properties of foam concrete[J]. Journal of Building Materials, 2017, 20(1): 93-98 (in Chinese).
[16] 方永浩, 王锐, 庞二波, 等. 水泥-粉煤灰泡沫混凝土抗压强度与气孔结构的关系[J]. 硅酸盐学报, 2010, 38(4): 621-626.
FANG Y H, WANG R, PANG E B, et al. Relationship between compressive strength and air-void structure of foamed cement-fly ash concrete[J]. Journal of the Chinese Ceramic Society, 2010, 38(4): 621-626 (in Chinese).
[17] 王琛艳. 结构物混凝土早期抗冻能力影响因素灰色关联分析[J]. 硅酸盐通报, 2015, 34(11): 3405-3411.
WANG C Y. Gray correlation analysis of factors affect the ability of structure concrete in early antifreeze[J]. Bulletin of the Chinese Ceramic Society, 2015, 34(11): 3405-3411 (in Chinese).
[18] 柯杨, 冯诚, 周琴, 等. 基于灰关联理论的混凝土孔结构对强度和耐久性的影响分析[J]. 混凝土, 2019(5): 42-47.
KE Y, FENG C, ZHOU Q, et al. Analysis of the influence of concrete pore structure on strength and durability based on grey relation theory[J]. Concrete, 2019(5): 42-47 (in Chinese).

冻融环境下泡沫混凝土的单轴压缩特性

Uniaxial Compression Characteristics of Foamed Concrete under Freeze-Thaw Environment

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	齐晓, 肖前慧, 邱继生, 刘书林. 冻融循环与硫酸盐侵蚀共同作用下再生混凝土的微观结构研究[J]. 硅酸盐通报, 2023, 42(4): 1194-1204.
[2]	郭毅松, 刘乐冕, 陈剑锋. 油茶粕绿色发泡剂制备泡沫混凝土的试验研究[J]. 硅酸盐通报, 2023, 42(4): 1226-1232.
[3]	高秀梅, 刘曙光, 闫敏. 冻融循环后PVA-ECC拉伸性能衰减规律研究[J]. 硅酸盐通报, 2023, 42(3): 837-844.
[4]	葛成龙, 周海龙, 陈岩, 吕志刚. 不同MB值机制砂混凝土的性能和微观孔隙结构[J]. 硅酸盐通报, 2023, 42(3): 888-897.
[5]	姚志鑫, 穆川川, 单俊鸿, 刘捷, 王奎, 高鹏. 基于裹浆工艺的煤矸石混凝土性能研究[J]. 硅酸盐通报, 2023, 42(2): 587-597.
[6]	李博, 石振武, 刘俊辰, 张洪瑞. 复合改良黄土状亚砂土强度特性及微观机制[J]. 硅酸盐通报, 2023, 42(1): 373-382.
[7]	孙杰, 冯川, 吴爽, 马稳, 孙明星. 持续荷载与冻融循环耦合作用下纤维混凝土损伤性能研究[J]. 硅酸盐通报, 2022, 41(8): 2728-2738.
[8]	熊远亮, 朱玉, 李保亮, 陈春, 张亚梅. 镍铁渣砂对泡沫混凝土孔结构及收缩开裂性能的影响[J]. 硅酸盐通报, 2022, 41(8): 2792-2799.
[9]	崔宁, 栾仲豪. 砖混类再生微粉泡沫胶凝材料力学性能研究[J]. 硅酸盐通报, 2022, 41(7): 2421-2429.
[10]	张阳, 麻梦梦, 刘佳鑫, 邓杰. 冻融循环下糯米浆对石灰土抗剪强度的影响[J]. 硅酸盐通报, 2022, 41(7): 2430-2437.
[11]	郝贠洪, 何丹丹, 吴日根, 何晓雁. 内蒙古中部隆盛庄古建筑青砖墙体冻害损伤研究[J]. 硅酸盐通报, 2022, 41(7): 2438-2446.
[12]	白应华, 潘秋阳. 煤矸石对泡沫混凝土孔结构的影响[J]. 硅酸盐通报, 2022, 41(6): 2047-2052.
[13]	宋向阳, 刘霖, 张永鹏. 聚丙烯酰胺改良土-膨润土的渗透性及对苯酚的吸附[J]. 硅酸盐通报, 2022, 41(6): 2201-2208.
[14]	戴时雨, 郝春来, 齐鹏远, 王刚, 赵美, 马伟民, 朱广超, 田怡然, 李莹. 组合处理工艺下硅藻土微观组织演变及孔隙结构变化[J]. 硅酸盐通报, 2022, 41(6): 2209-2216.
[15]	关国浩, 王学志, 贺晶晶. 海水海砂混凝土研究进展[J]. 硅酸盐通报, 2022, 41(5): 1483-1493.