铁尾砂泡沫混凝土抗冻融性能及可靠性分析

摘要/Abstract

摘要： 为研究铁尾砂泡沫混凝土抗冻融性能,制备了5组目标密度为900 kg/m³的泡沫混凝土,在硫酸盐环境下冻融循环后,对比分析不同铁尾砂掺量泡沫混凝土的质量损失、强度损失、孔隙面积率和微观结构。以质量损失和强度损失为衡量指标,评选最优配合比,基于Wiener退化过程进行可靠度分析并预测剩余寿命。结果表明:在硫酸盐冻融循环过程中,泡沫混凝土表面损伤,内部孔隙连通形成裂缝,各试件质量呈先增加后减少的趋势;抗压强度和孔隙面积率持续下降,细粒径铁尾砂的掺入有效缓解了泡沫混凝土的损伤。其中,20%(质量分数)铁尾砂掺量的泡沫混凝土抗冻融能力最强,试件经过约300次冻融循环后失效。本研究可为泡沫混凝土在冻土地区的应用提供思路。

关键词: 铁尾砂, 泡沫混凝土, 冻融循环, 硫酸盐环境, Wiener退化过程

Abstract: In order to study the freeze-thaw resistance of iron tailings sand foam concrete, five groups of foam concrete with a target density of 900 kg/m³ were prepared. The mass loss, strength loss, pore area rate and microstructure of foam concrete with different iron tailings sand content after freeze-thaw cycle in sulfate environment were compared and analyzed. Taking the mass loss and strength loss as the measurement indexes, the optimal mix ratio was selected, and the reliability analysis and residual life prediction were carried out based on the Wiener degradation process. The results show that during the sulfate freeze-thaw cycle, the surface of foam concrete is damaged, the internal pores are connected to form cracks, and the mass of each specimen increases first and then decreases. The compressive strength and pore area rate continue to decline, and the addition of fine iron tailings sand effectively alleviates the damage of foamed concrete. Among them, the foam concrete with 20% (mass fraction) iron tailings sand content has the strongest freeze-thaw resistance, and the specimen fails after about 300 freeze-thaw cycles. This study can provide ideas for the application of foam concrete in frozen soil areas.

Key words: iron tailings sand, foam concrete, freeze-thaw cycle, sulfate environment, Wiener degradation process

中图分类号:

TU528

朱利平, 杜晓丽, 邹天民. 铁尾砂泡沫混凝土抗冻融性能及可靠性分析[J]. 硅酸盐通报, 2023, 42(11): 3988-3995.

ZHU Liping, DU Xiaoli, ZOU Tianmin. Freeze-Thaw Resistance and Reliability Analysis of Iron Tailings Sand Foam Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 3988-3995.

参考文献

[1] NARAYANAN N, RAMAMURTHY K. Structure and properties of aerated concrete: a review[J]. Cement and Concrete Composites, 2000, 22(5): 321-329.
[2] IKPONMWOSA E, FALADE F, FAPOHUNDA C. A review and investigations of some properties of foamed aerated concrete[J]. Nigerian Journal of Technology, 2014, 33(1): 1-9.
[3] 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).
[4] 刘超, 罗健林, 李秋义, 等. 泡沫混凝土的生产现状及未来发展趋势[J]. 现代化工, 2018, 38(9): 10-14+16.
LIU C, LUO J L, LI Q Y, et al. Outlook and review in foam concrete production[J]. Modern Chemical Industry, 2018, 38(9): 10-14+16 (in Chinese).
[5] 雷东移, 郭丽萍, 刘加平, 等. 泡沫混凝土的研究与应用现状[J]. 功能材料, 2017, 48(11): 11037-11042+11053.
LEI D Y, GUO L P, LIU J P, et al. State of study and application of foamed concrete[J]. Journal of Functional Materials, 2017, 48(11): 11037-11042+11053 (in Chinese).
[6] YAN Z, DA C, Y C L, et al. Study on engineering properties of foam concrete containing waste seashell[J]. Construction and Building Materials, 2020, 260: 119896.
[7] OREN O H, GHOLAMPOUR A, GENCEL O, et al. Physical and mechanical properties of foam concretes containing granulated blast furnace slag as fine aggregate[J]. Construction and Building Materials, 2020, 238: 117774.
[8] JHATIAL A A, GOH W I, SOHU S, et al. Preliminary investigation of thermal behavior of lightweight foamed concrete incorporating palm oil fuel ash and eggshell powder[J]. Periodica Polytechnica Civil Engineering, 2020, 65(1): 168-180.
[9] ALI KHAWAJA S, JAVED U, ZAFAR T, et al. Eco-friendly incorporation of sugarcane bagasse ash as partial replacement of sand in foam concrete[J]. Cleaner Engineering and Technology, 2021, 4: 100164.
[10] 吕绍伟, 姜屏, 钱彪, 等. 铁尾矿砂力学特性及再生利用研究进展[J]. 硅酸盐通报, 2020, 39(2): 466-470+512.
LYU S W, JIANG P, QIAN B, et al. Research progress on mechanical properties and recycling of iron tailings sand[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(2): 466-470+512 (in Chinese).
[11] 惠婧, 谢群, 陈涛, 等. 铁尾矿砂混凝土基本性能研究进展[J]. 新型建筑材料, 2023, 50(1): 1-7+51.
HUI J, XIE Q, CHEN T, et al. Research progress on basic properties of iron tailings sand concrete[J]. New Building Materials, 2023, 50(1): 1-7+51 (in Chinese).
[12] 陈东平, 刘芳, 齐艳涛. 铁尾矿在水泥基材料中的再利用研究进展[J]. 环境工程, 2015, 33(8): 83-86.
CHEN D P, LIU F, QI Y T. Research progress in development of utilization of iron tailings in cementitious materials[J]. Environmental Engineering, 2015, 33(8): 83-86 (in Chinese).
[13] HOU Y F. Comparison of effect of iron tailing sand and natural sand on concrete properties[J]. Key Engineering Materials, 2014, 599: 11-14.
[14] ZHAO J S, NI K, SU Y P, et al. An evaluation of iron ore tailings characteristics and iron ore tailings concrete properties[J]. Construction and Building Materials, 2021, 286: 122968.
[15] 张玉琢, 马洁, 刘海卿. 铁尾矿砂混凝土路用性能试验研究[J]. 混凝土, 2018(12): 157-160.
ZHANG Y Z, MA J, LIU H Q. Experimental research on iron tailings as concrete fine aggregate in highway[J]. Concrete, 2018(12): 157-160 (in Chinese).
[16] 赵苏, 温煦, 丁向群, 等. 铁尾矿粉泡沫混凝土收缩性能的研究[J]. 混凝土, 2017(8): 59-61+65.
ZHAO S, WEN X, DING X Q, et al. Shrinkage performance of foamed concrete with iron ore tailings[J]. Concrete, 2017(8): 59-61+65 (in Chinese).
[17] 王建辉, 孟祥荫, 李涛, 等. 干湿循环下铁尾矿砂再生混凝土耐久性研究[J]. 混凝土, 2020(4): 64-66+69.
WANG J H, MENG X Y, LI T, et al. Durability of recycled concrete with iron tailings sand under dry-wet cycling[J]. Concrete, 2020(4): 64-66+69 (in Chinese).
[18] ZHU Q, YUAN Y X, CHEN J H, et al. Research on the high-temperature resistance of recycled aggregate concrete with iron tailing sand[J]. Construction and Building Materials, 2022, 327: 126889.
[19] 刘辉. 硫酸盐侵蚀与冻融循环双重因素对混凝土耐久性的影响[D]. 成都: 西南交通大学, 2013.
LIU H. Influence of sulfate attack and freeze-thaw cycle on concrete durability[D]. Chengdu: Southwest Jiaotong University, 2013 (in Chinese).
[20] 史波, 何旺. 铁尾矿砂超高性能混凝土的冻融循环耐久性分析[J]. 金属矿山, 2022(12): 65-69.
SHI B, HE W. Durability analysis of freeze-thaw cycle of iron tailings ultra-high performance concrete[J]. Metal Mine, 2022(12): 65-69 (in Chinese).
[21] RANJANI S I, RAMAMURTHY K. Behaviour of foam concrete under sulphate environments[J]. Cement and Concrete Composites, 2012, 34(7): 825-834.
[22] LI J Z, HUANG H X, WANG W J, et al. Compressive properties and anti-erosion characteristics of foam concrete in road engineering[J]. IOP Conference Series: Earth and Environmental Science, 2018, 108: 022066.
[23] 冯扣宝, 王路明, 蒋蕾, 等. 超轻水泥基发泡混凝土抗冻融性能试验研究[J]. 混凝土, 2015(12): 38-42.
FENG K B, WANG L M, JIANG L, et al. Experimental study on the performance of freezing-thawing resistance of ultralight foam concrete[J]. Concrete, 2015(12): 38-42 (in Chinese).
[24] 秦毅. 铁尾矿砂对泡沫混凝土力学性质和微观结构的影响[J]. 中国测试, 2022, 48(6): 134-142.
QIN Y. Effect of iron tailings sand on the mechanical properties and microstructure of foam concrete[J]. China Measurement & Test, 2022, 48(6): 134-142 (in Chinese).
[25] SHETTIMA A U, HUSSIN M W, AHMAD Y, et al. Evaluation of iron ore tailings as replacement for fine aggregate in concrete[J]. Construction and Building Materials, 2016, 120: 72-79.
[26] 刘润清, 欧阳鹏, 杨元全, 等. 双氧水发泡泡沫混凝土抗冻性与气孔特征的关系[J]. 硅酸盐学报, 2014, 42(8): 1055-1063+1069.
LIU R Q, OUYANG P, YANG Y Q, et al. Relationship between freeze-thaw resistance and air-void characteristics of foam concrete with hydrogen peroxide as foaming agent[J]. Journal of the Chinese Ceramic Society, 2014, 42(8): 1055-1063+1069 (in Chinese).
[27] 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).
[28] 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).
[29] 刘鑫, 倪铖伟, 孙东宁, 等. 干湿循环下含初始损伤泡沫混凝土劣化机理研究[J]. 材料导报, 2021, 35(14): 14065-14071.
LIU X, NI C W, SUN D N, et al. Study on deterioration mechanism of lightweight cellular concrete with initial damage under wetting-drying cycles[J]. Materials Reports, 2021, 35(14): 14065-14071 (in Chinese).
[30] 魏婉梦. 基于Wiener退化过程的剩余寿命估计[D]. 南京: 东南大学, 2018: 28-32.
WEI W M. Residual life estimation based on Wiener degeneration process[D]. Nanjing: Southeast University, 2018: 28-32 (in Chinese).