高温后冷却方式对玄武岩纤维混凝土力学性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (1): 92-101.

高温后冷却方式对玄武岩纤维混凝土力学性能的影响

庞建勇, 郑瑞琪, 胡秀月, 孙健, 徐国平, 苏永强

安徽理工大学土木建筑学院,淮南 232001

收稿日期:2023-07-04 修订日期:2023-10-08 出版日期:2024-01-15 发布日期:2024-01-16
通信作者: 孙健,硕士研究生。E-mail:SunJ0039@163.com
作者简介:庞建勇(1964—),男,博士,教授。主要从事岩土工程的研究。E-mail:pangjyong@163.com
基金资助:
煤炭资源与安全开采国家重点实验室基金(SKLCRSM23KF007);矿山建设工程安徽省高校重点实验室开放基金(GXZDSYS2022106);安徽省高校自然科学研究项目(2023AH051219);安徽理工大学研究生创新基金(2022CX2038)

Effect of Cooling Method after High Temperature on Mechanical Properties of Basalt Fiber Reinforced Concrete

PANG Jianyong, ZHENG Ruiqi, HU Xiuyue, SUN Jian, XU Guoping, SU Yongqiang

School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China

Received:2023-07-04 Revised:2023-10-08 Online:2024-01-15 Published:2024-01-16

摘要/Abstract

摘要： 高温处理后混凝土力学性能是工程建设中评价混凝土结构安全性能的重要指标之一。对不同玄武岩纤维(BF)掺量混凝土的力学性能进行了测试,将最优掺量的玄武岩纤维混凝土(BFRC)与普通混凝土(OC)进行高温处理(200、400、600、800 ℃),研究不同冷却方式(自然冷却和喷水冷却)对高温后BFRC性能劣化的影响,分析BFRC在不同温度和冷却方式下的力学性能变化规律。结果表明,当BF掺量为0.05%(体积分数)时,BFRC抗压强度、劈裂抗拉强度达到最大值,分别为50.2、3.5 MPa,较OC分别提高了14.87%、34.62%。BF的掺入能够有效增加混凝土的韧性以及抵抗开裂变形的能力。随着温度增加,BFRC试件的弹性模量减小但始终大于OC试件。同一冷却方式下OC的峰值应变均大于BFRC,不同冷却方式下的延性指数较常温均有所提高。

关键词: 混凝土, 高温冷却, 玄武岩纤维, 力学性能, 弹性模量, 延性指数, 韧性

Abstract: The mechanical property of concrete after high temperature treatment is one of the important indexes to evaluate the safety performance of concrete structure in engineering construction. The mechanical properties of concrete with different basalt fiber (BF) content were tested. The optimal basalt fiber reinforced concrete (BFRC) and ordinary concrete (OC) were subjected to high temperature treatment (200, 400, 600, 800 ℃). The effects of different cooling methods (natural cooling and spray cooling) on the performance degradation of BFRC after high temperature were studied, and the mechanical properties of BFRC under different temperatures and cooling methods were analyzed. The results show that when the content of BF is 0.05% (volume fraction), the compressive strength and splitting tensile strength of BFRC reach the maximum values of 50.2 and 3.5 MPa, which are 14.87% and 34.62% higher than those of OC, respectively. The incorporation of BF can effectively increase the toughness of concrete and the ability to resist cracking. With the increase of temperature, the elastic modulus of BFRC specimen decreases, but the elastic modulus of BFRC specimen is always greater than that of OC specimen. The peak strain of OC is greater than that of BFRC under the same cooling method, and the ductility index under different cooling methods is higher than that under normal temperature.

Key words: concrete, high temperature cooling, basalt fiber, mechanical property, elastic modulus, ductility index, toughness

中图分类号:

TU528

庞建勇, 郑瑞琪, 胡秀月, 孙健, 徐国平, 苏永强. 高温后冷却方式对玄武岩纤维混凝土力学性能的影响[J]. 硅酸盐通报, 2024, 43(1): 92-101.

PANG Jianyong, ZHENG Ruiqi, HU Xiuyue, SUN Jian, XU Guoping, SU Yongqiang. Effect of Cooling Method after High Temperature on Mechanical Properties of Basalt Fiber Reinforced Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(1): 92-101.

参考文献

[1] ZHOU M, LU W, SONG J W, et al. Application of ultra-high performance concrete in bridge engineering[J]. Construction and Building Materials, 2018, 186: 1256-1267.
[2] DE S A F, RIBEIRO C C, DA S P J D, et al. Influence of adding discontinuous and dispersed carbon fiber waste on concrete performance[J]. Journal of Cleaner Production, 2020, 273: 122920.
[3] ZHANG P, ZHENG Y X, WANG K J, et al. A review on properties of fresh and hardened geopolymer mortar[J]. Composites Part B: Engineering, 2018, 152: 79-95.
[4] HACHEMI S, KHATTAB M, BENZETTA H. Enhancing the performance of concrete after exposure to high temperature by coarse and fine waste fire brick: an experimental study[J]. Construction and Building Materials, 2023, 368: 130356.
[5] 杨娟, 朋改非. 钢纤维类型对超高性能混凝土高温爆裂性能的影响[J]. 复合材料学报, 2018, 35(6): 1599-1608.
YANG J, PENG G F. Influence of different types of steel fiber on explosive spalling behavior of ultra-high-performance concrete exposed to high temperature[J]. Acta Materiae Compositae Sinica, 2018, 35(6): 1599-1608 (in Chinese).
[6] 余江滔, 史天成, 郁颉, 等. 高性能纤维增强混凝土与筋材复合体系拉伸性能研究[J]. 同济大学学报(自然科学版), 2021, 49(6): 825-833+890.
YU J T, SHI T C, YU J, et al. Experimental study of tensile properties of composite system of high performance concrete and reinforcements[J]. Journal of Tongji University (Natural Science), 2021, 49(6): 825-833+890 (in Chinese).
[7] BAO H, YU M, CHI Y, et al. Performance evaluation of steel-polypropylene hybrid fiber reinforced concrete under supercritical carbonation[J]. Journal of Building Engineering, 2021, 43: 103159.
[8] KOČí V, VEJMELKOVÁ E, KOŇÁKOVÁ D, et al. Basic physical, mechanical, thermal and hygric properties of reactive powder concrete with basalt and polypropylene fibers after high-temperature exposure[J]. Construction and Building Materials, 2023, 374: 130922.
[9] 元成方, 赵军. 聚丙烯纤维混凝土的高温损伤机理[J]. 材料科学与工程学报, 2017, 35(1): 37-40+56.
YUAN C F, ZHAO J. Damage mechanism of polypropylene fiber reinforced concrete exposed to high temperature[J]. Journal of Materials Science and Engineering, 2017, 35(1): 37-40+56 (in Chinese).
[10] SU Q, XU J M. Durability and mechanical properties of rubber concrete incorporating basalt and polypropylene fibers: experimental evaluation at elevated temperatures[J]. Construction and Building Materials, 2023, 368: 130445.
[11] 李趁趁, 魏非凡, 刘超伟, 等. 高温后BFRP筋与纤维混凝土黏结性能[J]. 铁道科学与工程学报, 2023, 20(8): 3014-3025.
LI C C, WEI F F, LIU C W, et al. Bond performance between BFRP bars and fiber reinforced concrete exposed to high temperature[J]. Journal of Railway Science and Engineering, 2023, 20(8): 3014-3025 (in Chinese).
[12] 杨海峰, 杨焱茜, 王玉梅, 等. 高温后不同冷却方式下的混凝土钢筋粘结性能[J]. 土木与环境工程学报(中英文), 2021, 43(5): 94-100.
YANG H F, YANG Y X, WANG Y M, et al. Bond performance of concrete-steel rebar under different cooling ways after high temperature[J]. Journal of Civil and Environmental Engineering, 2021, 43(5): 94-100 (in Chinese).
[13] 吴海林, 郭金雨, 张玉. 混杂纤维混凝土抗压强度正交试验研究[J]. 科学技术与工程, 2022, 22(32): 14370-14378.
WU H L, GUO J Y, ZHANG Y. Orthogonal experimental study on compressive strength of hybrid fiber reinforced concrete[J]. Science Technology and Engineering, 2022, 22(32): 14370-14378 (in Chinese).
[14] PENG G F, BIAN S H, GUO Z Q, et al. Effect of thermal shock due to rapid cooling on residual mechanical properties of fiber concrete exposed to high temperatures[J]. Construction and Building Materials, 2008, 22(5): 948-955.
[15] LI Q T, XIA H R, YUAN G L, et al. Experimental study on the free expansion deformation of concrete during the cooling process after being heated to high temperature[J]. Construction and Building Materials, 2022, 337: 127617.
[16] 任纬航. 不同冷却制度下混凝土高温损伤机理的研究[D]. 杨凌: 西北农林科技大学, 2015.
REN W H. Study on high temperature damage mechanism of concrete under different cooling systems[D]. Yangling: Northwest A&F University, 2015 (in Chinese).
[17] ZHAO Y, DING D, BI J, et al. Experimental study on mechanical properties of precast cracked concrete under different cooling methods[J]. Construction and Building Materials, 2021, 301: 124141.
[18] ZHENG Y X, ZHANG Y, ZHUO J B, et al. A review of the mechanical properties and durability of basalt fiber-reinforced concrete[J]. Construction and Building Materials, 2022, 359: 129360.
[19] 王俊颜, 杨全兵. HDPE管混凝土延性和韧性的试验研究[J]. 建筑材料学报, 2009, 12(4): 394-397.
WANG J Y, YANG Q B. Experimental study on ductility and toughness of HDPE-pipe concrete[J]. Journal of Building Materials, 2009, 12(4): 394-397 (in Chinese).