摘要To study the effect of iron tailings content on the workability, mechanical properties and durability of road concrete, different proportions of iron tailings were used to replace natural sand as fine aggregate to prepare road concrete. The workability, compressive strength, flexural tensile strength, splitting tensile strength, dry shrinkage, impermeability and wear resistance of concrete were tested. The results showed that the workability of concrete mixed with iron tailings was good, which could fully meet the construction requirements. The 28-d flexural tensile strength of iron tailings concrete exceeds the designed standard value of 4.0 MPa, and the maximum is 5.9 MPa. With the increase of the dosage of iron tailing sand, the dry shrinkage strain and wear amount of concrete gradually increased and the water penetration depth decreased. The introduction of iron tailings will improve the impermeability and wear resistance of concrete, but it will increase the dry shrinkage. Therefore, the content of iron tail sand should not be too large. Under the condition of ensuring the performance of concrete, the content of iron tailings in fine aggregates should be controlled at about 50%.
Abstract：To study the effect of iron tailings content on the workability, mechanical properties and durability of road concrete, different proportions of iron tailings were used to replace natural sand as fine aggregate to prepare road concrete. The workability, compressive strength, flexural tensile strength, splitting tensile strength, dry shrinkage, impermeability and wear resistance of concrete were tested. The results showed that the workability of concrete mixed with iron tailings was good, which could fully meet the construction requirements. The 28-d flexural tensile strength of iron tailings concrete exceeds the designed standard value of 4.0 MPa, and the maximum is 5.9 MPa. With the increase of the dosage of iron tailing sand, the dry shrinkage strain and wear amount of concrete gradually increased and the water penetration depth decreased. The introduction of iron tailings will improve the impermeability and wear resistance of concrete, but it will increase the dry shrinkage. Therefore, the content of iron tail sand should not be too large. Under the condition of ensuring the performance of concrete, the content of iron tailings in fine aggregates should be controlled at about 50%.
张黎明, 彭举, 王显赫, 巢钟月, 尘福涛. Study on the Performance of Iron Tailings Road Concrete[J]. Journal of Highway and Transportation Research and Development, 2023, 17(4): 1-6.
ZHANG Li-ming, PENG Ju, WANG Xian-he, CHAO Zhong-yue, CHEN Fu-tao. Study on the Performance of Iron Tailings Road Concrete. Journal of Highway and Transportation Research and Development, 2023, 17(4): 1-6.
[1] NING Bao-kuan, LIU Wei. Research on Comprehensive Utilization of Ultra-fine Iron Tailings[M]. Beijing:Chemical Industry Press, 2016. (in Chinese) [2] LÜ Xing-dong, LIU Zhan-ao, ZHU Zhi-gang, et al. Study of the Progress of Tailings Comprehensive Utilization of Raw Materials in Cement and Concrete[J]. Materials Reports, 2018, 32(S2):452-456. (in Chinese) [3] JORG M, RICARDO P B, ELEONORA D. Human Environmental Contamination in the Iron Quadrangle, Brazil[J]. Applied Geochemistry, 2000, 15:193-201. [4] DAS S K, KUMAR S, RAMACHANDRARAO P. Exploitation of Iron Ore for the Development of Ceramic Tiles[J]. Waste Management, 2000, 20(8):725-729. [5] LICSKO I, LOIS l, SZEBENYI G. Tailings as A SOURCE of Environmental Pollution[J]. Water Science and Technology, 1999, 39(10-11):333-336. [6] WANG Xing-yi. Research on Road Performance of Iron Tailings Cement Concrete[D]. Liaoning:Dalian University of Technology. 2014. (in Chinese) [7] SIRKECI A A, GUL A, BULUT G. Recovery of Co, Ni, and Cu from the Tailings of Divrigi Iron Ore Concentrator[J]. Mineral Processing and Extractive Metallurgy Review, 2006, 27(2):131-141. [8] MCKEAGNEY R B. Trend to Use More Stone Sand Conference on Crushed Stone for Road and Street Construction and Reconstruction[J]. Cement and Concrete Composites, 1984(6):14-15. [9] SEYED R M, MOSTAFA F, RAMIN T et al. Mechanical Properties of Concrete with Sarcheshmeh Mineral Complex Copper Slag as a Part of Contentious Materials[J]. Construction and Building Materials, 2016, 134:44-49. [10] ANA C V Z, CAROLINA B F, FERNANDO S L. Synthetic Gravel for Concrete Obtained from Sandy Iron Ore Tailing and Recycled Polyethyltherephtalate[J]. Construction and Building Materials, 2017, 151:859-865. [11] BLESSEN S T, ALOK D, GUPTA R C. Strength and Durability Characteristics of Copper Tailing Concrete[J]. Construction and Building Materials, 2013, 48:894-900. [12] TANG Ke, MAO Xue-song, XU Wang. Performance Analysis of Cement Concrete Mixed with Fine Aggregate of Iron Tailings Sand[J]. Industrial Construction, 2019, 49(8):153-157. (in Chinese) [13] ZHANG Yu-zhuo, ZHOU Mei, LIU Kai. Experimental Study on the Application of Iron Tailings Sand to Concrete Fine Aggregate[J]. Non-metallic Mines, 2016, 39(6):57-59, 66. (in Chinese) [14] WANG Zhen-ming, LI Zhu, JIA Guan-hua, et al. Experimental Study on the Reuse of Tailings Sand in Glazed Hollow Bead Insulation Concrete[J]. Concrete, 2017(3):138-141. (in Chinese)
2023, Vol. 17 
