Mechanism of the effect of modified TiO2 on the strength of gold tailings-based no-fire bricks samples

IF 0.6 4区环境科学与生态学 Q4 ENGINEERING, ENVIRONMENTAL

Environment Protection Engineering Pub Date : 2025-01-01 DOI:10.37190/epe250207

Yang Guohao, HE Zhi-ming, Jiawei Sun, Hao Guo, Kai Zhang

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引用次数: 0

Abstract

Brick-making from gold tailings is one of the common utilization methods, however, this method usually requires pressurized sintering. This study investigates the effect of modified TiO 2 on the strength of gold tailings-based no-fire bricks under ambient temperature and pressure conditions. Gold tailings, river sand, and gravel were used as raw materials, with cement-epoxy resin serving as the composite binder and modified TiO 2 acting as the reinforcing agent. The surface of TiO 2 was modified by silane coupling agent KH-560 and polyethyleneimine (PEI), and the effect of modified TiO 2 on the performance and characterization of gold tailings-based no-fire bricks was investigated. The results show that 25% KH-560 silane coupling agent and 75% polyethyleneimine (PEI) modify TiO 2 best. The optimal compressive strength of 79.6 MPa was achieved in gold tailings-based no-fire bricks with 2% modified TiO 2 addition. Microscopic morphology and chemical analysis confirmed that the modified TiO 2 significantly enhanced the structural integrity of gold tailings-based no-fire bricks.

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改性TiO2对金尾矿基无火砖试样强度影响的机理

金尾矿制砖是常用的利用方法之一，但这种方法通常需要加压烧结。研究了常温常压条件下，改性二氧化钛对金尾矿基无火砖强度的影响。以金尾矿、河砂、砾石为原料，水泥-环氧树脂为复合粘结剂，改性二氧化钛为补强剂。采用硅烷偶联剂KH-560和聚乙烯亚胺（PEI）对二氧化钛进行表面改性，研究了改性后的二氧化钛对金尾矿基无火砖性能和表征的影响。结果表明，25% KH-560硅烷偶联剂和75%聚乙烯亚胺（PEI）对tio2的改性效果最好。添加2%改性tio2的金尾矿基无火砖抗压强度为79.6 MPa。显微形貌和化学分析证实，改性tio2显著提高了金尾矿基无火砖的结构完整性。

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来源期刊

Environment Protection Engineering 环境科学-工程：环境

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

12 months

期刊介绍： Water purification, wastewater treatment, water reuse, solid waste disposal, gas emission abatement, systems of water and air pollution control, soil remediation.