金尾矿复合砂对不同强度等级混凝土性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (9): 3231-3239.

金尾矿复合砂对不同强度等级混凝土性能的影响

童小根^1,2, 张凯峰^1,2,3, 孟刚^1,2, 朱王科^1,2, 王敏^1,2, 付万长³

1.中建西部建设北方有限公司,西安 710065;
2.西安市特种混凝土与低碳建材工程技术中心,西安 710065;
3.长安大学建筑工程学院,西安 710064

收稿日期:2023-05-05 修订日期:2023-06-06 出版日期:2023-09-15 发布日期:2023-09-14
作者简介:童小根(1990—),男,硕士研究生。主要从事水泥混凝土方面的研究。E-mail:793818815@qq.com
基金资助:
中建西部建设科技研发项目(ZJXJ-2021-08);陕西省科协企业创新争先青年人才托举计划(2021-1-2)

Influence of Gold Tailing Composite Sand on Properties of Different Strength Grade Concrete

TONG Xiaogen^1,2, ZHANG Kaifeng^1,2,3, MENG Gang^1,2, ZHU Wangke^1,2, WANG Min^1,2, FU Wanzhang³

1. China West Construction North Co., Ltd., Xi'an 710065, China;
2. Xi'an Engineering Technology Research Center of Special Concrete and Low-carbon Building Materials, Xi'an 710065, China;
3. College of Civil Engineering, Chang'an University, Xi'an 710064, China

Received:2023-05-05 Revised:2023-06-06 Online:2023-09-15 Published:2023-09-14

摘要/Abstract

摘要： 将金尾矿复合砂作为细集料替代天然砂,研究了金尾矿复合砂替代率对C30~C50混凝土和易性、抗压强度及耐久性的影响,并对力学性能较优组进行了微观结构分析。结果表明:当金尾矿复合砂替代率低于50%(质量分数)时,混合砂具有较优级配;当金尾矿复合砂替代率由0%增加至50%时,需通过调整外加剂掺量来保证金尾矿复合砂混凝土良好的工作性;当金尾矿复合砂替代率为20%~30%时,C30~C50混凝土不同龄期抗压强度、抗碳化性能和抗冻性能较未掺金尾矿复合砂基准组均有较大提升,微观水化产物相互交织增强了结构密实性。

关键词: 金尾矿复合砂, 颗粒级配, 混凝土, 工作性, 抗压强度, 耐久性能

Abstract: The gold tailing composite sand was used as fine aggregate to replace natural sand, the effect of gold tailing composite sand replacement rate on workability, compressive strength and durability of C30~C50 concrete were studied, and the microstructure of group with better mechanical properties was analyzed. The results show that when the replacement rate of gold tailing composite sand is lower than 50%(mass fraction), the composite sand has better gradation. When the replacement rate of gold tailing composite sand increases from 0% to 50%(mass fraction), it is necessary to adjust admixture amount to ensure the good workability of gold tailing composite sand concrete. When the replacement rate of gold tailing composite sand is 20%~30%(mass fraction), the compressive strength, carbonization resistance and freezing resistance of C30~C50 concrete at different ages are significantly improved compared with the reference group without gold tailing composite sand, and the interweaving microstructure hydration products enhances the structural compactness.

Key words: gold tailing composite sand, particle gradation, concrete, workability, compressive strength, durability

中图分类号:

TU528.041

童小根, 张凯峰, 孟刚, 朱王科, 王敏, 付万长. 金尾矿复合砂对不同强度等级混凝土性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3231-3239.

TONG Xiaogen, ZHANG Kaifeng, MENG Gang, ZHU Wangke, WANG Min, FU Wanzhang. Influence of Gold Tailing Composite Sand on Properties of Different Strength Grade Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(9): 3231-3239.

参考文献

[1] 中国混凝土与水泥制品协会预拌混凝土分会. 2020年度预拌混凝土行业发展报告[J]. 混凝土世界, 2021(1): 28-37.
China Concrete and Cement Products Association Premixed Concrete Branch. Development report of ready-mixed concrete industry in 2020[J]. China Concrete, 2021(1): 28-37 (in Chinese).
[2] 翟文静. 机制砂混凝土配合比设计方法研究[D]. 北京: 北京建筑大学, 2022: 1-5.
ZHAI W J. Study on mix proportion design method of machine-made sand concrete[D].Beijing: Beijing University of Civil Engineering and Architecture, 2022: 1-5 (in Chinese).
[3] GLOTOV V E, CHLACHULA J, GLOTOVA L P, et al. Causes and environmental impact of the gold-tailings dam failure at Karamken, the Russian Far East[J]. Engineering Geology, 2018, 245: 236-247.
[4] 王家臣, 王炳文, 徐文彬, 等. 高海拔高寒地区金属矿山采选固废安全处置现状及研究进展[J]. 中国安全生产科学技术, 2022, 18(7): 54-60.
WANG J C, WANG B W, XU W B, et al. Current status and research progress of safety disposal of solid waste from mining and mineral processing of metal mines in cold regions with high altitude[J]. Journal of Safety Science and Technology, 2022, 18(7): 54-60 (in Chinese).
[5] 刘竞怡, 孙志华, 温久然, 等. 金尾矿复合砂作为混凝土集料的物化性质及其改性试验[J]. 金属矿山, 2021(5): 211-220.
LIU J Y, SUN Z H, WEN J R, et al. Physical and chemical properties of gold tailing sand as concrete aggregate and its modification test[J]. Metal Mine, 2021(5): 211-220 (in Chinese).
[6] 孙旭东, 刘晓敏, 龚裕, 等. 黄金尾矿建材化利用的研究现状及展望[J]. 金属矿山, 2020(3): 12-22.
SUN X D, LIU X M, GONG Y, et al. Research status and prospects for the utilization of gold tailings as building materials[J]. Metal Mine, 2020(3): 12-22 (in Chinese).
[7] 孙婧, 元敬顺, 张会芳, 等. 基于骨料级配设计的活性粉末混凝土性能的研究[J]. 混凝土, 2017(7): 70-73+82.
SUN J, YUAN J S, ZHANG H F, et al. Study on properties of reactive powder concrete based on aggregate gradation design[J]. Concrete, 2017(7): 70-73+82 (in Chinese).
[8] INCE C. Reusing gold-mine tailings in cement mortars: mechanical properties and socio-economic developments for the Lefke-Xeros area of Cyprus[J]. Journal of Cleaner Production, 2019, 238: 117871.
[9] LIU C, LUO J L, LI Q Y, et al. Calcination of green high-belite sulphoaluminate cement (GHSC) and performance optimizations of GHSC-based foamed concrete[J]. Materials & Design, 2019, 182: 107986.
[10] 王长龙, 常宁, 陈烈, 等. 金尾矿固化氯离子的机理研究[J]. 矿产保护与利用, 2018(4): 112-117.
WANG C L, CHANG N, CHEN L, et al. Study on the curing mechanism of chloride ions from gold tailings[J]. Conservation and Utilization of Mineral Resources, 2018(4): 112-117 (in Chinese).
[11] 付万长, 蔡基伟, 史俊礼, 等. 化学与热处理法对金尾矿胶凝活性的激发[J]. 硅酸盐通报, 2020, 39(8): 2542-2548.
FU W C, CAI J W, SHI J L, et al. Chemical and thermal activation of reactivity of gold tailings as a supplementary cementitious material[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(8): 2542-2548 (in Chinese).
[12] WANG J N, YU R, XU W Y, et al. A novel design of low carbon footprint ultra-high performance concrete (UHPC) based on full scale recycling of gold tailings[J]. Construction and Building Materials, 2021, 304: 124664.
[13] CHENG Y H, HUANG F, QI S S, et al. Durability of concrete incorporated with siliceous iron tailings[J]. Construction and Building Materials, 2020, 242: 118147.
[14] LI T, WANG S L, XU F, et al. Study of the basic mechanical properties and degradation mechanism of recycled concrete with tailings before and after carbonation[J]. Journal of Cleaner Production, 2020, 259: 120923.
[15] 申艳军, 白志鹏, 郝建帅, 等. 尾矿制备混凝土研究进展与利用现状分析[J]. 硅酸盐通报, 2021, 40(3): 845-857+876.
SHEN Y J, BAI Z P, HAO J S, et al. Research progress and utilization status analysis of concrete prepared by tailings[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(3): 845-857+876 (in Chinese).
[16] 张啸, 王璜琪, 王栋民. 黄金尾矿制备水泥和混凝土的研究进展[J]. 硅酸盐通报, 2022, 41(9): 3121-3128.
ZHANG X, WANG H Q, WANG D M. Research progress on preparation of cement and concrete from gold tailings[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(9): 3121-3128 (in Chinese).
[17] 李志强, 王丹丹, 黄烈阳, 等. 金尾矿复合砂对C30混凝土物理性能的影响研究[J]. 河北建筑工程学院学报, 2021, 39(2): 7-10.
LI Z Q, WANG D D, HUANG L Y, et al. Study on the influence of gold tailings on physical properties of C30 concrete[J]. Journal of Hebei Institute of Architecture and Civil Engineering, 2021, 39(2): 7-10 (in Chinese).
[18] 李志强, 张轩硕, 卜娜蕊, 等. 基于正交实验金尾矿复合砂再生混凝土实验研究[J]. 矿产综合利用, 2022(6): 73-78+83.
LI Z Q, ZHANG X S, BU N R, et al. Research on orthogonal test of mixture ratio of gold tailings recycled concrete[J]. Multipurpose Utilization of Mineral Resources, 2022(6): 73-78+83 (in Chinese).