活性粉末混凝土高温后强度退化规律试验研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (12): 4245-4253.

所属专题：水泥混凝土

活性粉末混凝土高温后强度退化规律试验研究

毛振豪, 马乾坤, 张继承, 杜国锋

长江大学城市建设学院,荆州 434023

收稿日期:2022-07-19 修订日期:2022-08-03 出版日期:2022-12-15 发布日期:2023-01-11
通信作者: 张继承,博士,教授。E-mail:Zhangjicheng@yangtzeu.edu.cn
作者简介:毛振豪(1998—),男,硕士研究生。主要从事高性能混凝土耐久性方面的研究。E-mail:202071558@yangtzeu.edu.cn
基金资助:
国家自然科学基金(52078052)

Experimental Research on Strength Degradation Law of Reactive Powder Concrete after Elevated Temperatures

MAO Zhenhao, MA Qiankun, ZHANG Jicheng, DU Guofeng

School of Urban Construction, Yangtze University, Jingzhou 434023, China

Received:2022-07-19 Revised:2022-08-03 Online:2022-12-15 Published:2023-01-11

摘要/Abstract

摘要： 为研究活性粉末混凝土(RPC)高温后强度退化规律,对高温后RPC试件的质量损失、抗压性能和劈裂抗拉性能进行测试,并分析温度和纤维掺量对RPC强度的影响。结果表明:随着温度的升高,RPC试件的表观颜色由深逐渐变浅,质量损失率逐渐增大;而强度损失率均随着温度升高呈先减小后增大的趋势,但临界温度不同,立方体抗压强度和劈裂抗拉强度的临界温度为300 ℃,而轴心抗压强度的临界温度为200 ℃,此外,300 ℃后轴心抗压强度损失率高于立方体抗压强度,800 ℃后强度损失率均超80%,宏观强度退化的根本原因是基体微观形貌的劣化;掺有聚丙烯(PP)纤维的RPC试件高温后强度损失率相对较小,且当钢纤维掺量为2%(体积分数)时,PP纤维的最佳掺量为0.15%(体积分数)。通过回归分析,建立了RPC强度损失率与温度和PP纤维掺量间的计算公式。

关键词: 活性粉末混凝土, 高温, 聚丙烯纤维, 钢纤维, 强度退化, 函数关系

Abstract: To study the strength degradation law of reactive powder concrete (RPC) after elevated temperatures, the mass loss and compressive strength as well as split-tensile strength of RPC specimens after elevated temperatures were measured. Besides, the effects of temperature and fiber content on the strength of RPC samples were analyzed. The results show that the apparent color of RPC specimens gradually changes from dark to light, and the mass loss rate gradually increases with the rising temperature. The cubic strength loss rate and split-tensile strength loss rate as well as axial compressive strength loss rate all decrease first and then increase with the increasing temperature, but the critical temperature is different. The critical temperature of cube compressive strength and split-tensile strength is 300 ℃, while the critical temperature of axial compressive strength is 200 ℃. In addition, the loss rate of axial compressive strength is higher than that of cubic compressive strength after 300 ℃, and all the strength loss rates exceed 80% after 800 ℃. Deterioration of matrix microstructure is the root cause of macroscopic strength degradation. Moreover, the strength loss rate of the RPC specimen mixed with polypropylene (PP) fiber is relatively small after elevated temperature. When the steel fiber content is 2%(volume fraction), the optimal content of PP fiber is 0.15% (volume fraction). Finally, the calculation equation between the strength loss rate of RPC and temperature as well as PP fiber content was established through regression analysis.

Key words: reactive powder concrete, elevated temperature, polypropylene (PP) fiber, steel fiber, strength degradation, function

中图分类号:

TU528.2

毛振豪, 马乾坤, 张继承, 杜国锋. 活性粉末混凝土高温后强度退化规律试验研究[J]. 硅酸盐通报, 2022, 41(12): 4245-4253.

MAO Zhenhao, MA Qiankun, ZHANG Jicheng, DU Guofeng. Experimental Research on Strength Degradation Law of Reactive Powder Concrete after Elevated Temperatures[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(12): 4245-4253.

参考文献

[1] MESTROVIC D, CIZMR D, STANILOVIC V. Reactive powder concrete: material for the 21st century[J]. WIT Transactions on Engineering Sciences, 2007, 57.
[2] RICHARD P, CHEYREZY M H. Reactive powder concretes with high ductility and 200~800 MPa compressive strength[C]//“SP-144: Concrete Technology: Past, Present, and Future”. American Concrete Institute, 1994, 144: 507-518.
[3] RICHARD P, CHEYREZY M. Composition of reactive powder concretes[J]. Cement and Concrete Research, 1995, 25(7): 1501-1511.
[4] SANCHAYAN S, FOSTER S J. High temperature behaviour of hybrid steel-PVA fibre reinforced reactive powder concrete[J]. Materials and Structures, 2016, 49(3): 769-782.
[5] TAYEH B A, AADI A S, HILAL N N, et al. Properties of ultra-high-performance fiber-reinforced concrete (UHPFRC): a review paper[J]. AIP Conference Proceedings, 2019, 2157(1): 020040.
[6] 张丽辉,郭丽萍,孙伟,等.生态型高延性水泥基复合材料的高温损伤[J].硅酸盐学报,2014,42(8):1018-1024.
ZHANG L H, GUO L P, SUN W, et al. Damage of ecological high ductility cementitious composites after exposed to high temperature[J]. Journal of the Chinese Ceramic Society, 2014, 42(8): 1018-1024 (in Chinese).
[7] 邓明科,成媛,翁世强,等.高温后高延性混凝土的抗压性能及微观结构[J].复合材料学报,2020,37(4):985-996.
DENG M K, CHENG Y, WENG S Q, et al. Compressive properties and micro-structure of high ductility concrete exposed to elevated temperature[J]. Acta Materiae Compositae Sinica, 2020, 37(4): 985-996 (in Chinese).
[8] 李黎,李宗利,高丹盈,等.高温对钢纤维-聚乙烯醇纤维-CaCO₃晶须多尺度纤维/水泥复合材料弯曲性能和微观结构的影响[J].复合材料学报,2021,38(7):2326-2335.
LI L, LI Z L, GAO D Y, et al. Influence of high temperature on flexural properties and micro structure of steel fiberpolyvinyl alcohol fiber-CaCO₃ whisker multi-scale fibers/cement composite[J]. Acta Materiae Compositae Sinica, 2021, 38(7): 2326-2335 (in Chinese).
[9] 丁明冬,杜红秀.混杂纤维对活性粉末混凝土高温后抗压强度的影响[J].硅酸盐通报,2017,36(8):2763-2767.
DING M D, DU H X. Hybrid fiber on the influence of the reactive powder concrete compressive strength after high temperature[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(8): 2763-2767 (in Chinese).
[10] 李海艳,郑文忠,罗百福.高温后RPC立方体抗压强度退化规律研究[J].哈尔滨工业大学学报,2012,44(4):17-22+49.
LI H Y, ZHENG W Z, LUO B F. Experimental research on compressive strength degradation of reactive powder concrete after high temperature[J]. Journal of Harbin Institute of Technology, 2012, 44(4): 17-22+49 (in Chinese).
[11] 贺一轩,杜红秀.RPC高温后抗折强度试验及红外检测[J].消防科学与技术,2019,38(5):615-617.
HE Y X, DU H X. Flexural strength test and infrared detection of RPC after elevated temperature[J]. Fire Science and Technology, 2019, 38(5): 615-617 (in Chinese).
[12] 李根.掺聚丙烯纤维活性粉末混凝土高温后力学性能研究[J].新型建筑材料,2018,45(6):29-32+47.
LI G. Study on mechanical properties of reactive powder concrete with polypropylene fiber after high temperatures[J]. New Building Materials, 2018, 45(6): 29-32+47 (in Chinese).
[13] MAO Z H, ZHANG J C, LUO Z Z, et al. Behavior evaluation of hybrid fibre-reinforced reactive powder concrete after elevated temperatures[J]. Construction and Building Materials, 2021, 306: 124917.
[14] 鞠杨,刘红彬,刘金慧,等.活性粉末混凝土热物理性质的研究[J].中国科学:技术科学,2011,41(12):1584-1605.
JU Y, LIU H B, LIU J H, et al. Study on Thermophysical properties of reactive powder concrete [J]. Scientia Sinica (Technologica), 2011, 41(12): 1584-1605 (in Chinese).
[15] ZHENG W Z, LUO B F, WANG Y. Microstructure and mechanical properties of RPC containing PP fibres at elevated temperatures[J]. Magazine of Concrete Research, 2014, 66(8): 397-408.
[16] ABID M, HOU X M, ZHENG W Z, et al. Effect of fibers on high-temperature mechanical behavior and microstructure of reactive powder concrete[J]. Materials (Basel, Switzerland), 2019, 12(2): 329.
[17] CHANG Y F, CHEN Y H, SHEU M S, et al. Residual stress-strain relationship for concrete after exposure to high temperatures[J]. Cement and Concrete Research, 2006, 36(10): 1999-2005.
[18] British Standard Institute. Eurocode 2: design of concrete structures-part 1.2: general rules-structural fire design: 1992-1-2: 2004[S]. BS EN, 1992.

活性粉末混凝土高温后强度退化规律试验研究

Experimental Research on Strength Degradation Law of Reactive Powder Concrete after Elevated Temperatures

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]	董祎然, 赵成琳, 郭伟, 姜葱葱, 黄世峰, 程新. 花岗岩锯泥和大理石废石粉制备发泡陶瓷[J]. 硅酸盐通报, 2023, 42(3): 939-947.
[2]	梁金源, 张礼华, 刘来宝, 焦茂鹏, 荆桂花, 刘川北, 辜涛. 高碳铬铁渣基尖晶石-镁橄榄石高强陶瓷骨料的制备及性能[J]. 硅酸盐通报, 2023, 42(3): 1054-1062.
[3]	史扬帆, 潘勇, 高扬, 迟蓬涛, 陈思安. 超高温陶瓷及其复合材料的稀土改性研究进展[J]. 硅酸盐通报, 2023, 42(2): 682-693.
[4]	杨鹏鹏, 魏国平, 黄奥, 李昇昊, 顾华志. 基于数字图像相关法的铝镁质耐火材料抗侵蚀性能研究[J]. 硅酸盐通报, 2023, 42(2): 761-768.
[5]	刘虎林, 侯慧慧, 于成龙, 满振勇, 党锋珍, 薛云龙, 伍媛婷. 超高温稀土硼化物(Y_1-xYb_x)B₆的制备及力学性能研究[J]. 硅酸盐通报, 2023, 42(1): 276-286.
[6]	李成, 耿晨梓, 代丹, 王春雨, 宋维凯, 姚晓. 废弃玻璃粉对水泥石高温抗压强度和微观结构的影响[J]. 硅酸盐通报, 2022, 41(9): 3219-3226.
[7]	董博, 闵昌胜, 陈博, 邓承继, 谢哲, 杨千秋, 丁军, 祝洪喜, 杨昕雨, 余超. 陶瓷相结合粉煤灰漂珠轻质隔热材料的制备及性能研究[J]. 硅酸盐通报, 2022, 41(9): 3315-3323.
[8]	王聪聪, 杜红秀, 石丽娜, 樊祺. 碳纤维-钢纤维水泥基复合材料电学性能试验研究[J]. 硅酸盐通报, 2022, 41(8): 2696-2705.
[9]	张建波, 陈升平, 卢应发. FRP筋异强混凝土叠浇梁挠度与延性研究[J]. 硅酸盐通报, 2022, 41(8): 2739-2747.
[10]	夏冬桃, 李向阳, 胡军安. 基于正交试验的透水再生混凝土性能优化试验研究[J]. 硅酸盐通报, 2022, 41(8): 2748-2758.
[11]	庄彬彬, 萧超雄, 刘强, 邓嘉辉, 汪大洋. 不同掺合料混凝土与锈蚀钢筋间粘结-滑移力学性能试验研究[J]. 硅酸盐通报, 2022, 41(8): 2767-2773.
[12]	刘欣楠, 肖彦之, 黄美琪, 蒋菡, 孔江榕, 周涛. Ni、Cu共浸渍的LSCM-GDC复合阴极性能研究[J]. 硅酸盐通报, 2022, 41(7): 2458-2466.
[13]	毛传勇, 董淑娟, 蒋佳宁, 邓龙辉, 曹学强. Si/(Yb_1-xY_x)₂Si₂O₇/LaMgAl₁₁O₁₉热/环境障涂层的高温性能研究[J]. 硅酸盐通报, 2022, 41(7): 2564-2573.
[14]	梁宁慧, 毛金旺, 刘新荣, 许益华, 周侃. 玄武岩-粗聚丙烯纤维干硬性混凝土拉压性能试验研究[J]. 硅酸盐通报, 2022, 41(6): 1946-1954.
[15]	陈晶晶, 黄章益, 齐建起, 邓貌, 石阳, 胡春峰, 王皓民. (Ti_0.25Zr_0.25Nb_0.25Ta_0.25)C高熵陶瓷的制备、力学性能及氧化行为研究[J]. 硅酸盐通报, 2022, 41(6): 2117-2125.