硅酸盐学报

模拟海水海砂混凝土孔溶液碱度对玄武岩-碳混杂纤维增强复合筋耐久性的影响

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郭向柯 ¹ , 吴庆亮 ¹ , 周新显 ¹ , 宋灿 ¹ , 李伟华 ¹^,²

硅酸盐学报 | 研究论文 2025,53(8): 2264-2272

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硅酸盐学报 |研究论文 2025 , 53 (8) : 2264 -2272

模拟海水海砂混凝土孔溶液碱度对玄武岩-碳混杂纤维增强复合筋耐久性的影响

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郭向柯¹, 吴庆亮¹, 周新显¹, 宋灿¹, 李伟华¹^,²

作者信息

^1．华北水利水电大学河南省基础设施腐蚀防控重点实验室，郑州 450045

^2．河南省科学院化学研究所，郑州 450046

通讯作者:

李伟华（1971—），女，博士，教授。

作者简介:

郭向柯（1992—），男，博士，讲师。

Effects of Simulated Seawater Sea Sand Concrete Pore Solution Alkalinity on Durability of Basalt-carbon Hybrid Fiber Reinforced Plastics Bars

Xiangke GUO¹, Qingliang WU¹, Xinxian ZHOU¹, Can SONG¹, Weihua LI¹^,²

Affiliations

^1.Henan Provincial Key Laboratory of Infrastructure Corrosion Prevention and Control, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

^2.Institute of Chemistry, Henan Academy of Sciences, Zhengzhou 450046, China

Corresponding Author:

LI Weihua (1971-), female, Ph.D., Professor. E-mail: liweihua@ncwu.edu.cn

GUO Xiangke (1992-), male, Ph.D., Lecturer. E-mail: guoxiangke@ncwu.edu.cn

出版时间: 2025-08-20 doi: 10.14062/j.issn.0454-5648.20250082

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摘要

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利用碳纤维代替部分玄武岩纤维形成玄武岩-碳混杂纤维增强复合（HFRP）筋，以期提高玄武岩纤维增强复合（BFRP）筋在碱性海水海砂混凝土（SSSC）中的耐久性。研究不同碱度模拟SSSC孔溶液（pH=10.1，12.3，13.2）中BFRP筋和HFRP筋的力学性能时变规律，利用微观分析测试手段揭示其耐腐蚀性能提升机制。结果表明：BFRP和HFRP筋受拉伸和层间剪切失效模式基本相似；相比BFRP筋，HFRP筋初始拉伸性能得到明显提升，且界面性能并未弱化，腐蚀90 d后由于碱度提升致使拉伸强度和层间剪切强度衰减的最大幅度分别降低19.67%和23.43%；HFRP筋的劣化包括纤维刻蚀、树脂水解、纤维/树脂界面及BFRP/CFRP界面性能退化；由于碳纤维较小的直径、优异的耐腐蚀性能，以及BFRP/CFRP界面的屏障作用，延缓了水分和腐蚀离子在HFRP筋中的腐蚀和渗透，进而提高了其在高碱性SSSC环境中的耐久性。

关键词

混杂纤维增强复合筋 / 海水海砂混凝土 / 孔溶液碱度 / 力学性能 / 耐久性

Abstract

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Introduction

Alkaline environment-induced (Basalt fiber reinforced polymer) BFRP bars degradation is the prominent issues to BFRP-reinforced seawater sea sand concrete (SSSC) durability. A new type of basalt-carbon hybrid FRP (HFRP) bars was developed to improve the mechanical properties and durability of BFRP bars in marine environments. Herein, the effect of simulated SSSC pore solution alkalinity on the durability of HFRP bars was studied. Macro- and micro-properties of HFRP samples were tested, i.e., tensile properties, interlayer shear properties, microstructure, chemical composition, and chemical stability. Meanwhile, the degradation mechanism of HFRP bars in simulated SSSC pore solutions with different alkalinity has also been summarized. The results show that compared with BFRP bars, the initial tensile strength of HFRP bars has been significantly improved, and its interfacial strength has not weakened. After 90 d of corrosion, the increase in alkalinity leads to a maximum decrease in tensile strength and interlayer shear strength degradation of 19.67% and 23.43%, respectively. The degradation of HFRP bars includes fiber etching, resin hydrolysis, degradation of interfaces on fiber/resin and BFRP/CFRP. The smaller diameter and excellent corrosion resistance of carbon fiber, and BFRP/CFRP interface barrier function delay the penetration and corrosion of moisture and existing ions, i.e., Cl^- and OH^-, improving the durability of HFRP bars in high alkaline SSSC environments.

Methods

Tensile properties, interlayer shear properties, microstructure, chemical composition, and chemical stability of HFRP bars in simulated SSSC pore solution with different alkalinity were systematically measured. The research mainly adopts a combination of macroscopic performance testing and microscopic testing analysis.

Both epoxy resin based BFRP and HFRP bars with a nominal diameter d of 10 mm were prepared by pultrusion process. HFRP bars consists of inner and outer cores made of CFRP and BFRP materials, respectively. The volume fraction of carbon fiber replacing basalt fiber was 25%.

Three alkaline salt solutions with different pH values were designed to study the effects of simulated SSSC pore solution alkalinity on HFRP bars. The ordinary SSSC pore solution (Ca(OH)₂ 2 g/L, KOH 19.9 g/L, NaOH 2.4 g/L) was prepared from seawater with a pH value of 13.2. Two lower alkalinity SSSC pore solutions with pH value of 12.3 and 10.1 were diluted with artificial seawater, respectively. All corrosion exposure experiments were conducted in a constant temperature water tank at 55 ℃.

The tensile performance was evaluated according to ACI 40.3R-12. The total length of the sample was 1000 mm, and the testing section was 10 d. The interlayer shear performance was determined based on ASTM D4475. The length and span of the sample were 7d and 6d, respectively. All experiments were conducted using MTS testing. The testing rates for tension and interlayer shear are 2 mm/min and 1.3 mm/min, respectively.

Digital microscopy (DM) and SEM-EDS were used to analyze the corrosion morphology and composition of BFRP and HFRP bars after corrosion. AFM was used to analyze the microstructure of the transition zone at the BFRP/CFRP interface.

Results and discussion

The macroscopic morphology analysis results indicate that the carbon fiber hybrid did not change the tensile line elastic failure mode and interlayer interface failure modes of HFRP bars. Compared to BFRP bars, the ultimate load of HFRP bars was increased, and the explosive fibers during failure were significantly reduced with the extension of corrosion time and the increase in simulated SSSC pore solution alkalinity; Both BFRP and HFRP bars interlayer interface failures involve a main crack that runs through and deviates from the BFRP/CFRP interface.

The carbon fiber hybrid improves the tensile properties and interlayer interface properties of HFRP bars, and enhances its corrosion resistance in alkaline simulated SSSC pore solution. Taking tensile strength as an example, compared with BFRP bars, the tensile strength of BFRP bars in simulated SSSC pore solutions with pH values of 10.1, 12.4, and 13.2 was 78.48%, 71.20%, and 26.20% of its original value, while the corresponding values of HFRP bars were 87.86%, 85.22%, and 55.26%, respectively. After 90 d of corrosion, the maximum decrease in tensile strength and interlayer shear strength due to the increase in alkalinity was 19.67% and 23.43%, respectively.

The degradation of HFRP bars in alkaline SSSC pore solution includes fiber etching, resin hydrolysis, and degradation of fiber/resin interfacial and BFRP/CFRP interfacial properties. The smaller diameter of carbon fiber, excellent corrosion resistance, and BFRP/CFRP interface barrier function delay the penetration and corrosion of moisture and existing ions, improving the durability of HFRP bars in high alkaline SSSC environments.

Key words

hybrid fiber reinforced plastics bars / seawater sea sand concrete / alkalinity pore solution / mechanical properties / durability

引用本文

郭向柯, 吴庆亮, 周新显, 宋灿, 李伟华. 模拟海水海砂混凝土孔溶液碱度对玄武岩-碳混杂纤维增强复合筋耐久性的影响. 硅酸盐学报, 2025 , 53 (8) : 2264 -2272 . DOI: 10.14062/j.issn.0454-5648.20250082

Xiangke GUO, Qingliang WU, Xinxian ZHOU, Can SONG, Weihua LI. Effects of Simulated Seawater Sea Sand Concrete Pore Solution Alkalinity on Durability of Basalt-carbon Hybrid Fiber Reinforced Plastics Bars[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (8) : 2264 -2272 . DOI: 10.14062/j.issn.0454-5648.20250082

基金

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国家自然科学基金(52408258)
河南省基础设施腐蚀防控重点实验室开放基金(HNICP 202410)
河南省科技厅科技攻关项目(252102320027)
河南省建设厅科技研发项目(HNJS-2024-K32)

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2025年第53卷第8期

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文章信息

doi: 10.14062/j.issn.0454-5648.20250082

接收时间：2025-02-10
首发时间：2026-10-21
出版时间：2025-08-20

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出版历史

收稿日期：2025-02-10
修回日期：2025-03-10

基金

国家自然科学基金(52408258)

河南省基础设施腐蚀防控重点实验室开放基金(HNICP 202410)

河南省科技厅科技攻关项目(252102320027)

河南省建设厅科技研发项目(HNJS-2024-K32)

作者信息

^1．华北水利水电大学河南省基础设施腐蚀防控重点实验室，郑州 450045

^2．河南省科学院化学研究所，郑州 450046

通讯作者:

李伟华（1971—），女，博士，教授。

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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20250082

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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