纤维水泥基材料抗冻性与孔结构关系的变化规律

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (5): 1529-1538.

纤维水泥基材料抗冻性与孔结构关系的变化规律

何晓雁, 张天晓, 王辰昊, 武皓杰

内蒙古工业大学土木工程学院,呼和浩特 010051

收稿日期:2021-12-29 修回日期:2022-02-28 出版日期:2022-05-15 发布日期:2022-06-01
作者简介:何晓雁(1970—),女,副教授。主要从事混凝土耐久性方面的研究。E-mail:2732108278@qq.com
基金资助:
国家自然科学基金(51468049);内蒙古自治区自然科学基金(2020LH05008)

Variation of Relationship Between Frost Resistance and Pore Structure of Fiber Cement-Based Material

HE Xiaoyan, ZHANG Tianxiao, WANG Chenhao, WU Haojie

School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Received:2021-12-29 Revised:2022-02-28 Online:2022-05-15 Published:2022-06-01

摘要/Abstract

摘要： 本文探究了冻融循环过程中纤维水泥基材料性能的变化规律与劣化机理。采用压汞法测量纤维水泥基材料在未经历冻融和经历300次冻融循环后,其孔隙特征参数(总孔体积、总孔隙率、最可几孔径、临界孔径和平均孔径)与体积百分比(无害孔、少害孔、有害孔和多害孔)。并运用灰色相对关联度将纤维水泥基材料在未经历冻融和经历300次冻融循环后的抗冻性指标与孔隙特征参数和体积百分比分别进行关联分析。研究表明,随着冻融循环次数的增加,纤维水泥基材料的质量损失率逐渐降低,即质量呈现增加趋势,抗压强度、动弹性模量和超声波波速均有不同程度的减小。其内部孔隙特征参数和体积百分比的变化规律可以解释抗冻性指标产生变化的微观原因。经历过冻融循环后,纤维水泥基材料的平均孔径和孔隙体积百分比与抗冻性指标的相对关联度有明显的提高。

关键词: 纤维水泥基材料, 抗冻性, 孔结构, 压汞法, 灰色相对关联度

Abstract: In this paper, the variation law and deterioration mechanism of fiber cement-based material properties during freeze-thaw cycles were explored. Mercury injection method was used to measure the pore characteristic parameters (total pore volume, total porosity, most probable pore size, critical pore size and average pore size) and the volume percentage (harmless pore, less harmful pore, harmful pore and multi-harmful pore) of fiber cement-based materials without freeze-thaw and after 300 freeze-thaw cycles. And the gray relative correlation degree was used to correlate the frost resistance index of fiber cement-based materials without freeze-thaw and after 300 freeze-thaw cycles with pore characteristic parameters and volume percentage respectively. The study shows that with the increase of the number of freeze-thaw cycles, the mass loss rate of fiber cement-based materials decreases gradually, that is, the mass increases gradually, and the compressive strength, dynamic elastic modulus and ultrasonic wave velocity all decrease to different degrees. The variation law of its internal pore characteristic parameters and volume percentage explain the microscopic reasons for the variation of the frost resistance index. After the freeze-thaw cycles, the relative correlation between the average pore size and pore volume percentage of fiber cement-based materials and the frost resistance index is significantly improved.

Key words: fiber cement-based material, frost resistance, pore structure, mercury intrusion method, grey relative correlation degree

中图分类号:

TU528

何晓雁, 张天晓, 王辰昊, 武皓杰. 纤维水泥基材料抗冻性与孔结构关系的变化规律[J]. 硅酸盐通报, 2022, 41(5): 1529-1538.

HE Xiaoyan, ZHANG Tianxiao, WANG Chenhao, WU Haojie. Variation of Relationship Between Frost Resistance and Pore Structure of Fiber Cement-Based Material[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1529-1538.

参考文献

[1] AVDAR A. Investigation of freeze-thaw effects on mechanical properties of fiber reinforced cement mortars[J]. Composites Part B: Engineering, 2014, 58: 463-472.
[2] KOSIOR-KAZBERUK M, BERKOWSKI P. Surface scaling resistance of concrete subjected to freeze-thaw cycles and sustained load[J]. Procedia Engineering, 2017, 172: 513-520.
[3] 张永存,李青宁.基于孔结构分析的混凝土抗冻融性研究[J].公路,2016,61(3):182-186.
ZHANG Y C, LI Q N. Research on freeze-thaw resistance of concrete based on pore structure analysis[J]. Highway, 2016, 61(3): 182-186 (in Chinese).
[4] 秦泳,徐彬,郑一峰.掺加硅藻土混凝土孔隙结构冻融破坏试验研究[J].路基工程,2020(5):43-48.
QIN Y, XU B, ZHENG Y F. Experimental study on freezing and thawing failure test of diatomite doped concrete with pore structure[J]. Subgrade Engineering, 2020(5): 43-48 (in Chinese).
[5] 陈虎.矿物复掺C60机制砂混凝土耐久性能研究[J].中外公路,2015,35(4):300-303.
CHEN H. Study on the durability performance of mineral compounded C60 mechanism sand concrete[J]. Journal of China & Foreign Highway, 2015, 35(4): 300-303 (in Chinese).
[6] 赵燕茹,刘芳芳,王磊,等.单面盐冻条件下基于孔结构的玄武岩纤维混凝土抗压强度模型[J].材料导报,2020,34(12):12064-12069.
ZHAO Y R, LIU F F, WANG L, et al. Modeling of the compressive strength of basalt fiber concrete based on pore structure under single-side freeze-thaw condition[J]. Materials Reports, 2020, 34(12): 12064-12069 (in Chinese).
[7] 吴倩云,马芹永,王莹.冻融循环作用下玄武岩纤维-矿渣粉-粉煤灰混凝土压拉强度试验与细观结构[J].复合材料学报,2021,38(3):953-965.
WU Q Y, MA Q Y, WANG Y. Compression-tensile tests and meso-structure of basalt fiber-slag powder-fly ash concrete under freeze-thaw cycles[J]. Acta Materiae Compositae Sinica, 2021, 38(3): 953-965 (in Chinese).
[8] 吴倩云,马芹永.冻融循环作用下BSFC的抗冻性及损伤模型[J].建筑材料学报,2021,24(6):1169-1178.
WU Q Y, MA Q Y. Frost resistance and damage model of BSFC under freeze-thaw cycles[J]. Journal of Building Materials, 2021, 24(6): 1169-1178 (in Chinese).
[9] AMORIM N S J, SILVA G A O, RIBEIRO D V. Effects of the incorporation of recycled aggregate in the durability of the concrete submitted to freeze-thaw cycles[J]. Construction and Building Materials, 2018, 161: 723-730.
[10] GU C P, YE G, SUN W. A review of the chloride transport properties of cracked concrete: experiments and simulations[J]. Journal of Zhejiang University-SCIENCE A, 2015, 16(2): 81-92.
[11] 刘海峰,马映昌,张润奇,等.冻融环境下沙漠砂对混凝土轴心受压力学性能的影响[J].哈尔滨工业大学学报,2021,53(3):101-109+117.
LIU H F, MA Y C, ZHANG R Q, et al. Influence of desert sand on axial compression behavior of concrete under freezing and thawing environment[J]. Journal of Harbin Institute of Technology, 2021, 53(3): 101-109+117 (in Chinese).
[12] 郭耀华,丁红岩,张浦阳,等.基于压汞试验的SAP混凝土孔结构特征[J].建筑材料学报,2018,21(1):138-142.
GUO Y H, DING H Y, ZHANG P Y, et al. Pore structure characteristics of SAP concrete based on mercury intrusion test[J]. Journal of Building Materials, 2018, 21(1): 138-142 (in Chinese).
[13] 邢秉元,程鹏宇,唐继朋,等.冻融循环作用下饱水砂浆孔结构的演变规律[J].硅酸盐学报,2021,49(2):331-339.
XING B Y, CHENG P Y, TANG J P, et al. Pore structure evolution of water-saturated mortar under freeze-thaw cycles[J]. Journal of the Chinese Ceramic Society, 2021, 49(2): 331-339 (in Chinese).
[14] 高延红,邵鑫杰,章玉容,等.自然潮差环境粉煤灰混凝土渗透性能的相关性[J].水力发电学报,2021,40(2):214-222.
GAO Y H, SHAO X J, ZHANG Y R, et al. Permeability dependency of fly ash concrete in natural tidal environment[J]. Journal of Hydroelectric Engineering, 2021, 40(2): 214-222 (in Chinese).
[15] 吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1999.
WU Z W, LIAN H Z. High performance concrete[M]. Beijing: China Railway Press, 1999 (in Chinese).
[16] 刘思峰,党耀国,方志耕.灰色系统理论及其应用[M].5版.北京:科学出版社,2010.
LIU S F, DANG Y G, FANG Z G. Gray system theory and its applications[M]. 5th ed. Beijing: Science Press, 2010 (in Chinese).