铁尾矿砂基环氧树脂透水材料力学性能及界面特性研究

摘要/Abstract

摘要： 利用固体废弃物制备透水材料是海绵城市发展新方向,而力学性能差成为固废基透水材料应用的难点之一。为解决该问题,设计了一类用铁尾矿砂作为骨料,环氧树脂作为胶凝材料的聚合物透水材料,研究了环氧树脂含量对透水材料力学性能和透水性能的影响,并探讨了纳米SiO₂、TiO₂、Al₂O₃和硅烷偶联剂KH-560等有机-无机材料对透水材料力学性能的影响。结果表明:当环氧树脂质量分数为6%时,可以得到兼顾力学性能和透水性能的透水材料,抗压、抗折强度和透水速率分别为17.5 MPa、5.3 MPa和1.12 mm/s;同时,当纳米SiO₂、TiO₂、Al₂O₃的添加量分别为环氧树脂的3%、4%、4%(质量分数)时,对透水材料力学性能的提升分别为33.1%、30.5%、28.6%,其原因是纳米粒子在透水材料受压过程中会吸收树脂基体中的部分能量,抑制或消除树脂中微裂纹的扩散;当硅烷偶联剂KH-560的添加量为环氧树脂的0.9%(质量分数)时,透水材料的强度可提升36.5%。SEM和FTIR分析表明,硅烷偶联剂KH-560对改善铁尾矿砂与环氧树脂界面具有显著作用。该研究对研发高性能的固废基透水材料具有重要意义。

关键词: 透水材料, 铁尾矿砂, 纳米改性, 环氧树脂, 硅烷偶联剂, 力学性能, 透水系数

Abstract: Manufacturing of permeable materials via solid waste is a potential direction in the development of sponge cities. However, the poor mechanical properties become one of the key difficulties for the application of permeable materials. In this study, polymer permeable material combined with iron tailings sand as aggregate and epoxy resin as cementitious material was designed. The effects of epoxy resin content on the mechanical properties and water permeability of permeable materials were investigated. Additionally, the effects of different organic-inorganic admixtures such as nano-SiO₂, TiO₂, Al₂O₃ and silane coupling agent KH-560 on the mechanical properties were discussed. The results show that when the mass fraction of epoxy resin is 6%, a high performance permeable material is obtained, the compressive strength, flexural strength and water permeability rates are 17.5 MPa, 5.3 MPa and 1.12 mm/s, respectively. When the addition amount of nano-SiO₂, TiO₂, Al₂O₃ is 3%, 4%, 4% (mass fraction) of epoxy resin, the improvement of the compressive strength is 33.1%, 30.5%, 28.6%, respectively. The reason is concluded that nanoparticles absorb part of the energy in the resin matrix during the compression of the permeable material, inhibiting or eliminating the diffusion of microcracks in the resin. When the addition amount of the silane coupling agent KH-560 is 0.9% of epoxy resin, the compressive strength increased by 36.5%.SEM and FTIR analysis show that silane coupling agent KH-560 has a significant effect on improving the interface between iron tailings sand and epoxy resins. This research provides significant guidance to development of high-performance solid waste-based permeable materials.

Key words: permeable material, iron tailings sand, nano-modified, epoxy resin, silane coupling agent, mechanical property, water permeability coefficient

中图分类号:

TU521

曹港豪, 蹇守卫, 魏博, 李宝栋, 赵金鹏. 铁尾矿砂基环氧树脂透水材料力学性能及界面特性研究[J]. 硅酸盐通报, 2022, 41(7): 2384-2392.

CAO Ganghao, JIAN Shouwei, WEI Bo, LI Baodong, ZHAO Jinpeng. Mechanical Properties and Interface Characteristics of Iron Tailings Sand-Based Epoxy Resin Permeable Material[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2384-2392.

参考文献

[1] JAMALI B, LÖWE R, BACH P M, et al. A rapid urban flood inundation and damage assessment model[J]. Journal of Hydrology, 2018, 564: 1085-1098.
[2] ANSARI A H, JAKARNI F M, MUNIANDY R, et al. Natural rubber as a renewable and sustainable bio-modifier for pavement applications: a review[J]. Journal of Cleaner Production, 2021, 289: 125727.
[3] APOSTOLIDIS P, LIU X Y, ERKENS S, et al. Use of epoxy asphalt as surfacing and tack coat material for roadway pavements[J]. Construction and Building Materials, 2020, 250: 118936.
[4] WANG C H, XIAO X D, LU Y F, et al. Utilization and properties of modified epoxy resin for colorful anti-slip pavements[J]. Construction and Building Materials, 2019, 227: 116801.
[5] ZHANG H, GAO P W, PAN Y Q, et al. Development of cold-mix high-toughness resin and experimental research into its performance in a steel deck pavement[J]. Construction and Building Materials, 2020, 235: 117427.
[6] WANG Y P, YE J F, LIU Y H, et al. Influence of freeze-thaw cycles on properties of asphalt-modified epoxy repair materials[J]. Construction and Building Materials, 2013, 41: 580-585.
[7] 田鹏江.环氧树脂类混凝土透水路面材料组成设计及性能研究[D].西安:长安大学,2018.
TIAN P J. Design and design of epoxy resin permeable pavement material performance study[D]. Xi’an: Changan University, 2018 (in Chinese).
[8] 吴承彬.聚合物透水混凝土性质及应用技术研究[J].福建建设科技,2020(2):35-38.
WU C B. Properties and application of polymer permeable concrete[J]. Fujian Construction Science & Technology, 2020(2): 35-38 (in Chinese).
[9] DE LA VARGA I, MUÑOZ J F, SPRAGG R P, et al. Nanosilica coatings to improve the tensile bond strength of cementitious grouts[J]. Transportation Research Record: Journal of the Transportation Research Board, 2019, 2673(10): 586-594.
[10] MORSHED S A, YOUNG T J, CHIRDON W M, et al. Durability of wet lay-up FRP bonded to concrete with nanomodified epoxy adhesives[J]. The Journal of Adhesion, 2020, 96(13): 1141-1166.
[11] MENDES B C, PEDROTI L G, FONTES M P F, et al. Technical and environmental assessment of the incorporation of iron ore tailings in construction clay bricks[J]. Construction and Building Materials, 2019, 227: 116669.
[12] GOLAFSHANI E M, BEHNOOD A. Application of soft computing methods for predicting the elastic modulus of recycled aggregate concrete[J]. Journal of Cleaner Production, 2018, 176: 1163-1176.
[13] POON C S, SHUI Z H, LAM L. Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregates[J]. Construction and Building Materials, 2004, 18(6): 461-468.
[14] ULSEN C, TSENG E, ANGULO S C, et al. Concrete aggregates properties crushed by jaw and impact secondary crushing[J]. Journal of Materials Research and Technology, 2019, 8(1): 494-502.
[15] TOPÇU Ì B, ȘENGEL S. Properties of concretes produced with waste concrete aggregate[J]. Cement and Concrete Research, 2004, 34(8): 1307-1312.
[16] 赵世琦,云会明.刚性粒子增韧环氧树脂的研究[J].中国塑料,1999,13(9):37-41.
ZHAO S Q, YUN H M. Study on rigid particle toughened epoxy resin[J]. China Plastics, 1999, 13(9): 37-41 (in Chinese).
[17] 陈健聪,彭勃.纳米SiO₂改性环氧树脂结构胶的性能研究[J].热固性树脂,2006,21(5):17-20.
CHEN J C, PENG B. Study on properties of epoxy resin structural adhesive modified by nanosize silicate[J]. Thermosetting Resin, 2006, 21(5): 17-20 (in Chinese).
[18] 李朝阳,邱大健,谢国先,等.纳米SiO₂增韧改性环氧树脂的研究[J].材料保护,2008,41(4):21-23+2.
LI C Y, QIU D J, XIE G X, et al. Structure and properties of epoxy resin modified by nano-SiO₂[J]. Materials Protection, 2008, 41(4): 21-23+2 (in Chinese).
[19] 董元彩,孟卫,魏欣,等.环氧树脂/二氧化钛纳米复合材料的制备及性能[J].塑料工业,1999,27(6):37-38.
DONG Y C, MENG W, WEI X, et al. Preparation and property of EP/TiO₂ nanocomposite[J]. China Plastics Industry, 1999, 27(6): 37-38 (in Chinese).
[20] ZHANG X Y, WEN W Y, YU H Q, et al. Preparation, characterization of nano-silica/fluoroacrylate material and the application in stone surface conservation[J]. Journal of Polymer Research, 2016, 23(4): 1-12.
[21] LIU J S, WU S P, DONG E. Effect of coupling agent as integral blend additive on silicone rubber sealant[J]. Journal of Applied Polymer Science, 2013, 128(4): 2337-2343.
[22] WANG Z H, YUAN L, LIANG G Z, et al. Mechanically durable and self-healing super-hydrophobic coating with hierarchically structured KH570 modified SiO₂-decorated aligned carbon nanotube bundles[J]. Chemical Engineering Journal, 2021, 408: 127263.
[23] GU J W, ZHANG Q Y, DANG J, et al. Preparation and mechanical properties researches of silane coupling reagent modified β-silicon carbide filled epoxy composites[J]. Polymer Bulletin, 2009, 62(5): 689-697.
[24] WEI Q, WANG W H. Properties of phenol formaldehyde resin modified with silane coupling agent (KH550)[J]. International Journal of Adhesion and Adhesives, 2018, 84: 166-172.
[25] NAGUIB H M, AHMED M A, ABO-SHANAB Z L. Silane coupling agent for enhanced epoxy-iron oxide nanocomposite[J]. Journal of Materials Research and Technology, 2018, 7(1): 21-28.