粉煤灰对渠道用混凝土抗冻及抗冲磨性能的影响

摘要/Abstract

摘要： 新疆北疆地区混凝土渠道冻胀及冲刷磨损严重,渠道用混凝土成本偏高,为合理利用新疆地区粉煤灰资源,保证装配式渠道用混凝土抗冻及抗冲磨性能,本文制备了粉煤灰掺量分别为胶凝材料的0%(质量分数,下同)、10%、20%、30%的混凝土,同时结合装配式混凝土渠道企业生产用配合比,对混凝土进行力学性能、冻融循环、冲刷磨损试验。结果表明:混凝土3、7 d的力学性能随粉煤灰掺量的增加而降低,粉煤灰掺量为10%的混凝土28 d力学性能最优,达57.8 MPa;混凝土抗冻性能随粉煤灰掺量的增加呈先增大后减小的趋势,粉煤灰掺量为20%的混凝土抗冻性能最佳,与未掺粉煤灰的混凝土相比,粉煤灰掺量为10%、20%的混凝土抗冻性能均有所提升;混凝土抗冲磨性能随粉煤灰掺量增大呈先上升后下降趋势,粉煤灰掺量为10%的混凝土抗冲磨性能最好,与未掺粉煤灰的混凝土相比,其抗冲磨性能提升了约12%,表明粉煤灰对混凝土抗冻及抗冲磨性能有较明显的改善作用。

关键词: 粉煤灰, 渠道用混凝土, 力学性能, 冻融循环, 抗冻性能, 抗冲磨性能, 微观结构

Abstract: Concrete channels in northern Xinjiang are heavily frost-heave and scour and wear, and the cost of concrete used in channels is relatively high. In order to make reasonable use of fly ash resources in Xinjiang and ensure the frost resistance and scour resistance of concrete used in channels, concrete with fly ash content of 0% (mass fraction, the same below), 10%, 20% and 30%, respectively, was prepared. At the same time, the mechanical properties, freeze-thaw cycle and erosion wear tests were carried out in combination with the ratio used in the production of prefabricated concrete channels. The results show that 3 and 7 d mechanical properties of concrete decrease with the increase of fly ash content, and 28 d mechanical properties of concrete with 10% fly ash content are the best. The frost resistance of concrete increases first and then decreases with the increase of fly ash content. The forst resistance of concrete with 20% fly ash content is the best. Compared with the concrete without fly ash, the frost resistance of concrete with 10% and 20% fly ash content is improved. The impact wear resistance of concrete increases first and then decreases with the increase of fly ash content. The scour resistance of concrete with 10% fly ash content is the best, and the scour resistance of concrete with 10% fly ash content is improved by about 12% compared with that without fly ash. The results show that fly ash can improve the frost resistance and scour resistance of concrete.

Key words: fly ash, channel concrete, mechanical property, freeze-thaw cycle, frost resistance, scour resistance, microstructure

中图分类号:

TU528.36

刘佳敏, 马玉薇, 李刚. 粉煤灰对渠道用混凝土抗冻及抗冲磨性能的影响[J]. 硅酸盐通报, 2024, 43(4): 1436-1444.

LIU Jiamin, MA Yuwei, LI Gang. Effect of Fly Ash on Frost and Scour Resistance ofConcrete for Channels[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(4): 1436-1444.

参考文献

[1] 王正中, 江浩源, 王羿, 等. 旱寒区输水渠道防渗抗冻胀研究进展与前沿[J]. 农业工程学报, 2020, 36(22): 120-132.
WANG Z Z, JIANG H Y, WANG Y, et al. Research progresses and frontiers in anti-seepage and anti-frost heave of canals in cold-arid regions[J]. Transactions of the Chinese Society of Agricultural Engineering, 2020, 36(22): 120-132 (in Chinese).
[2] 姜春萌, 李双喜, 蒋林华, 等. 冻融作用下低热水泥混凝土抗冲磨性能评价[J]. 长江科学院院报, 2023, 40(8): 163-169.
JIANG C M, LI S X, JIANG L H, et al. Evaluation of abrasion resistance of low heat cement concrete under freezing and thawing[J]. Journal of Yangtze River Scientific Research Institute, 2023, 40(8): 163-169 (in Chinese).
[3] 方建银, 潘优, 党发宁, 等. 季节性寒区高地下水位渠道衬砌形式试验研究[J]. 西安理工大学学报, 2021, 37(3): 433-440.
FANG J Y, PAN Y, DANG F N, et al. Experimental study of channel lining forms with high groundwater in seasonal cold area[J]. Journal of Xi'an University of Technology, 2021, 37(3): 433-440 (in Chinese).
[4] 王辉, 刘旭辉, 蔡升宇, 等. 粉煤灰掺量对高性能自密实混凝土抗压强度发展影响分析[J]. 硅酸盐通报, 2021, 40(5): 1573-1578.
WANG H, LIU X H, CAI S Y, et al. Influence of fly ash content on compressive strength development of high performance self-compacting concrete[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(5): 1573-1578 (in Chinese).
[5] 程宁熹, 虞小芳, 刘盈智, 等. 新疆电力行业碳减排路径模拟[J]. 合作经济与科技, 2023(11): 23-27.
CHENG N X, YU X F, LIU Y Z, et al. Simulation of carbon emission reduction path in Xinjiang electric power industry[J]. Co-Operative Economy & Science, 2023(11): 23-27 (in Chinese).
[6] 王春晓, 董建明, 李得胜. 基于孔结构分形的混杂纤维混凝土抗冻性能研究[J]. 硅酸盐通报, 2021, 40(11): 3608-3616.
WANG C X, DONG J M, LI D S. Research on frost resistance of hybrid fiber reinforced concrete based on fractal theory of pore structure[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(11): 3608-3616 (in Chinese).
[7] ZHAO R D, YUAN Y, CHENG Z Q, et al. Freeze-thaw resistance of class F fly ash-based geopolymer concrete[J]. Construction and Building Materials, 2019, 222: 474-483.
[8] DAI J P, WANG Q C, ZHANG B. Frost resistance and life prediction of equal strength concrete under negative temperature curing[J]. Construction and Building Materials, 2023, 396: 132278.
[9] 丁向群, 王钰, 邢进, 等. 粉煤灰对混凝土干湿循环抗冻性能的影响[J]. 硅酸盐通报, 2015, 34(S1): 17-21+26.
DING X Q, WANG Y, XING J, et al. Effect of fly ash on frost resistance of concrete under dry-wet cycle[J]. Bulletin of the Chinese Ceramic Society, 2015, 34(S1): 17-21+26 (in Chinese).
[10] 李阳, 王瑞骏, 闫菲, 等. 粉煤灰对混凝土抗冻及抗硫酸盐性能的影响[J]. 西北农林科技大学学报(自然科学版), 2017, 45(2): 219-226.
LI Y, WANG R J, YAN F, et al. Influence of fly ash on resistance of concrete to freeze and sulfate[J]. Journal of Northwest A & F University (Natural Science Edition), 2017, 45(2): 219-226 (in Chinese).
[11] 丁庆军, 耿雪飞, 彭程康琰, 等. 纤维对抗冲磨超高性能混凝土性能的影响[J]. 硅酸盐通报, 2020, 39(3): 724-729.
DING Q J, GENG X F, PENG C K Y, et al. Effect of fiber on performance of anti-wear ultra-high performance concrete[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(3): 724-729 (in Chinese).
[12] 段珍华, 邓琪, 肖建庄, 等. 再生混凝土冲击磨耗性能与调控方法[J]. 建筑材料学报, 2022, 25(11): 1136-1142.
DUAN Z H, DENG Q, XIAO J Z, et al. Abrasion resistance of recycled aggregate concrete and its control method[J]. Journal of Building Materials, 2022, 25(11): 1136-1142 (in Chinese).
[13] LI T Y, LIU X M, WEI Z Q, et al. Study on the wear-resistant mechanism of concrete based on wear theory[J]. Construction and Building Materials, 2021, 271: 121594.
[14] 刘荣桂, 徐超杰, 崔钊玮, 等. 纳米MgO粉煤灰混凝土的力学性能研究[J]. 混凝土, 2023(5): 121-123.
LIU R G, XU C J, CUI Z W, et al. Mechanical properties experiment research of nano-MgO fly ash concrete[J]. Concrete, 2023(5): 121-123 (in Chinese).
[15] WANG L, JIN M M, GUO F X, et al. Pore structural and fractal analysis of the influence of fly ash and silica fume on the mechanical property and abrasion resistance of concrete[J]. Fractals, 2021, 29(2): 2140003.
[16] ISLAM M M, ALAM M T, ISLAM M S. Effect of fly ash on freeze-thaw durability of concrete in marine environment[J]. Australian Journal of Structural Engineering, 2018, 19(2): 146-161.
[17] ZHANG D S, MAO M J, ZHANG S R, et al. Influence of stress damage and high temperature on the freeze-thaw resistance of concrete with fly ash as fine aggregate[J]. Construction and Building Materials, 2019, 229: 116845.
[18] 丁庆军, 李进辉, 耿雪飞, 等. 橡胶颗粒掺杂提高超高性能混凝土的抗冲磨性能及其机理[J]. 硅酸盐学报, 2020, 48(10): 1636-1643.
DING Q J, LI J H, GENG X F, et al. Mechanism of enhancing anti-abrasion performance of ultrahigh-performance concrete via rubber particles[J]. Journal of the Chinese Ceramic Society, 2020, 48(10): 1636-1643 (in Chinese).
[19] 余舟, 王磊, 杨华全. 不同掺合料对水工混凝土抗冲磨性能的影响研究[J]. 混凝土, 2019(6): 96-99.
YU Z, WANG L, YANG H Q. Study on the influence of different admixtures on the abrasion resistance of hydraulic concrete[J]. Concrete, 2019(6): 96-99 (in Chinese).
[20] CAI X H, HE Z, TANG S W, et al. Abrasion erosion characteristics of concrete made with moderate heat Portland cement, fly ash and silica fume using sandblasting test[J]. Construction and Building Materials, 2016, 127: 804-814.
[21] WU F, CHEN X Q, CHEN J G. Abrasion resistance enhancement of concrete using surface treatment methods[J]. Tribology International, 2023, 179: 108180.
[22] ZARRABI N, MOGHIM M N, EFTEKHAR M R. Effect of hydraulic parameters on abrasion erosion of fiber reinforced concrete in hydraulic structures[J]. Construction and Building Materials, 2021, 267: 120966.
[23] XU O M, HAN S, LIU Y M, et al. Experimental investigation surface abrasion resistance and surface frost resistance of concrete pavement incorporating fly ash and slag[J]. International Journal of Pavement Engineering, 2021, 22(14): 1858-1866.
[24] BA H J, LI J J, NI W, et al. Effect of calcium to silicon ratio on the microstructure of hydrated calcium silicate gels prepared under medium alkalinity[J]. Construction and Building Materials, 2023, 379: 131240.
[25] WANG S Y, GU X W, LIU J P, et al. Modulation of the workability and Ca/Si/Al ratio of cement-metakaolin cementitious material system by using fly ash: synergistic effect and hydration products[J]. Construction and Building Materials, 2023, 404: 133300.