二次铝灰烧结渣料对高强混凝土力学性能和收缩性能的影响

doi:10.16552/j.cnki.issn1001-1625.2024.0868

摘要/Abstract

摘要： 为了探究二次铝灰烧结渣料的建材化利用途径,开展了不同掺量烧结渣料对C50、C60及C70混凝土力学性能和收缩性能的影响及机理研究。研究结果表明,烧结渣料掺量为15%(占总细骨料质量)时C50和C60混凝土的抗压强度均略高于未掺加烧结渣料基准试件,而对C70混凝土而言,不同烧结渣料掺量高强混凝土试件抗压强度均低于未掺加烧结渣料的基准试件,且烧结渣料掺量在10%～15%时,抗压强度的降低幅度最低。低掺量烧结渣料对高强混凝土峰值应变、极限应变、弹性模量及泊松比的影响不明显,但高掺量烧结渣料影响显著,且对更高强度等级混凝土影响最大;烧结渣料掺量为15%时高强混凝土的总收缩率和自收缩率最低,其中C50、C60及C70混凝土总收缩率相较未掺加烧结渣料的基准试件分别下降29.05%、22.17%和27.88%,自收缩率分别下降15.24%、26.52%和30.56%。因此,烧结渣料掺量为15%时,对高强混凝土的内养护作用和自身强度低的负面作用效果相当,从而使高强混凝土获得适宜的抗压强度和最低收缩率。

关键词: 高强混凝土, 收缩变形, 力学性能, 应力-应变曲线, 二次铝灰, 烧结渣料

Abstract: In order to explore the way of building materials utilization of secondary aluminum ash sintered slag, the influence and mechanism of different content of sintered slag on the mechanical and shrinkage properties of C50, C60 and C70 concrete were studied. The results show that the compressive strength of C50 and C60 concrete is slightly higher than that of unadded sintered slag reference specimen when the content of sintered slag is 15% (account for total fine aggregate mass), while for C70 concrete, the compressive strength of high-strength concrete specimens with different sintered slag content is lower than that of unadded sintered slag reference specimen. When the sintered slag content is in the range of 10%~15%, the reduction of compressive strength is the lowest. The effect of low content sintered slag on peak strain, ultimate strain, elastic modulus and Poisson ratio of high-strength concrete is not obvious, but the effect of high content sintered slag is significant, and the effect is the greatest on higher strength grade concrete. When the sintered slag content is 15%, the total shrinkage rate and self-shrinkage rate of high-strength concrete are the lowest, among which the total shrinkage of C50, C60 and C70 concrete decreases by 29.05%, 22.17% and 27.88%, and the self-shrinkage rate decreases by 15.24%, 26.52% and 30.56%, respectively, compared with the reference group without sintered slag. Therefore, when the content of sintered slag is 15%, the internal curing effect of high-strength concrete is equivalent to the negative effect of low self-strength, so that high-strength concrete can obtain the appropriate compressive strength and the lowest shrinkage rate.

Key words: high-strength concrete, shrinkage deformation, mechanical property, stress-strain curve, secondary aluminum ash, sintered slag

中图分类号:

TU528.31

纪璐鑫, 马红瑞, 马哲洋, 王胜, 崔嘉铭, 巴明芳. 二次铝灰烧结渣料对高强混凝土力学性能和收缩性能的影响[J]. 硅酸盐通报, 2025, 44(1): 212-222.

JI Luxin, MA Hongrui, MA Zheyang, WANG Sheng, CUI Jiaming, BA Mingfang. Influence of Secondary Aluminum Ash Sintered Slag on Mechanical and Shrinkage Properties of High-Strength Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(1): 212-222.

参考文献

[1] 姚燕, 王玲, 吴浩, 等. 高强高性能混凝土研究和应用现状与发展方向[J]. 建井技术, 2018, 39(4): 28-35.
YAO Y, WANG L, WU H, et al. Study, application status and development orientation of high strength and high performances concrete[J]. Mine Construction Technology, 2018, 39(4): 28-35 (in Chinese).
[2] 董淑慧. 内部湿度对陶粒混凝土界面区结构与收缩影响的研究[D]. 哈尔滨: 哈尔滨工业大学, 2010.
DONG S H. Study on the influence of internal humidity on the structure and shrinkage of ceramsite concrete interface area[D]. Harbin: Harbin Institute of Technology, 2010 (in Chinese).
[3] 杨健辉, 陈静, 张鹏, 等. 全轻页岩陶粒混凝土的强度影响因素[J]. 河南理工大学学报(自然科学版), 2014, 33(5): 664-670.
YANG J H, CHEN J, ZHANG P, et al. Influencing factors of strength on full lightweight shale ceramsite concrete[J]. Journal of Henan Polytechnic University (Natural Science), 2014, 33(5): 664-670 (in Chinese).
[4] YAO X L, WANG W L, LIU M, et al. Synergistic use of industrial solid waste mixtures to prepare ready-to-use lightweight porous concrete[J]. Journal of Cleaner Production, 2019, 211: 1034-1043.
[5] 董淑慧, 张宝生, 葛勇, 等. 轻骨料对混凝土自养护减缩效率的影响[J]. 硅酸盐学报, 2009, 37(3): 465-469.
DONG S H, ZHANG B S, GE Y, et al. Influence of lightweight aggregate on shrinkage reducing efficiency of concrete[J]. Journal of the Chinese Ceramic Society, 2009, 37(3): 465-469 (in Chinese).
[6] 高礼雄, 荣辉, 李强. 陶砂对混凝土收缩性能影响的研究[J]. 混凝土, 2008(12): 49-50.
GAO L X, RONG H, LI Q. Study on the influence of pottery sand on shrinkage property of concrete[J]. Concrete, 2008(12): 49-50 (in Chinese).
[7] 李青, 晏方, 陈宇良, 等. 外掺钢纤维混凝土早期力学性能的试验研究[J]. 混凝土, 2020(6): 102-105.
LI Q, YAN F, CHEN Y L, et al. Experimental study on mechanical properties of concrete with adding steel fiber at early age[J]. Concrete, 2020(6): 102-105 (in Chinese).
[8] 陈思颖, 雷冬, 赵彬娜, 等. 混凝土界面过渡区弹性模量分布的数值模拟[J]. 混凝土, 2020(4): 46-49.
CHEN S Y, LEI D, ZHAO B N, et al. Numerical simulation of ITZ elastic modules distribution of concrete[J]. Concrete, 2020(4): 46-49 (in Chinese).
[9] 刘喜, 史尚冕, 赵天俊, 等. 轻骨料混凝土弹性模量计算模型分析[J]. 硅酸盐通报, 2017, 36(7): 2192-2196+2202.
LIU X, SHI S M, ZHAO T J, et al. Calculation model for elastic modulus of lightweight aggregate concrete[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(7): 2192-2196+2202 (in Chinese).
[10] 孔丽娟, 段鹏飞, 王新军. 陶砂对混合骨料混凝土性能的影响[J]. 混凝土, 2023(3): 106-109.
KONG L J, DUAN P F, WANG X J. Effect of ceramic sand on performance of combined aggregate concrete[J]. Concrete, 2023(3): 106-109 (in Chinese).
[11] 刘风琴, 李劼, 陈开斌, 等. 我国铝工业固危废资源化利用现状及发展趋势[J]. 有色金属(冶炼部分), 2024(9): 1-13.
LIU F Q, LI J, CHEN K B, et al. Current situation and technology development trend of resource utilization for solid hazardous waste in aluminum industry in China[J]. Nonferrous Metals (Extractive Metallurgy), 2024(9): 1-13 (in Chinese).
[12] 康泽双, 刘中凯, 田野, 等. 国内铝工业全行业铝灰特性和利用处置技术研究进展[J]. 有色金属(冶炼部分), 2022(9): 28-35.
KANG Z S, LIU Z K, TIAN Y, et al. Research progress on characteristics of aluminum ash and practice of utilization and disposal technology in aluminum industry[J]. Nonferrous Metals (Extractive Metallurgy), 2022(9): 28-35 (in Chinese).
[13] 魏杰, 刘战伟, 颜恒维, 等. 铝灰的回收利用和无害化处理研究及应用进展[J]. 硅酸盐通报, 2022, 41(7): 2308-2320.
WEI J, LIU Z W, YAN H W, et al. Research and application progress on aluminum dross recycling and harmless treatment[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(7): 2308-2320 (in Chinese).
[14] 冯庆革, 邱树恒, 杨义, 等. 用废铝渣制备膨胀和自应力硫铝酸盐水泥的研究[J]. 中山大学学报(自然科学版), 2007, 46(6): 341.
FENG Q G, QIU S H, YANG Y, et al. Preparation of expansive and self-stressing sulphoaluminate cement using bauxite waste[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2007, 46(6): 341-342 (in Chinese).
[15] 曾雪玲, 喻庆华, 古安林, 等. 铝渣灰制备硫铝酸盐水泥的实验室研究[J]. 四川建材, 2017, 43(1): 10-12.
ZENG X L, YU Q H, GU A L, et al. Laboratory study of sulphoaluminate cement made from aluminum slag ash[J]. Sichuan Building Materials, 2017, 43(1): 10-12 (in Chinese).
[16] EWAIS E M M, KHALIL N M, AMIN M S, et al. Utilization of aluminum sludge and aluminum slag (dross) for the manufacture of calcium aluminate cement[J]. Ceramics International, 2009, 35(8): 3381-3388.
[17] 黎碧云, 孙振平, 胡匡艺, 等. 减缩剂对新拌水泥浆体体积变化的影响[J]. 建筑材料学报, 2020, 23(3): 493-499.
LI B Y, SUN Z P, HU K Y, et al. Effect of shrinkage reducing agents on absolute volume change of fresh cement paste[J]. Journal of Building Materials, 2020, 23(3): 493-499 (in Chinese).
[18] BRINKER C J, SCHERER G W. Sol-gei science[M]. New York: Academic Press, 1990.
[19] TSAKIRIDIS P E, OUSTADAKIS P, MOUSTAKAS K et al. Cyclones and fabric filters dusts from secondary aluminium flue gases: a characterization and leaching study[J]. International Journal of Environmental Science & Technology, 2016, 13(7): 1793-1802.
[20] REDDY M S, NEERAJA D. Mechanical and durability aspects of concrete incorporating secondary aluminium slag[J]. Resource-Efficient Technologies, 2016, 2(4): 225-232.
[21] PEREIRA D A, DE AGUIAR B, CASTRO F, et al. Mechanical behaviour of Portland cement mortars with incorporation of Al-containing salt slags[J]. Cement and Concrete Research, 2000, 30(7): 1131-1138.