Work

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

Year: 2025

Type: article

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 TiO2 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 TiO2 acting as the reinforcing agent. The surface of TiO2 was modified by silane coupling agent KH-560 and polyethyleneimine (PEI), and the effect of modified TiO2 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 TiO2 best. The optimal compressive strength of 79.6 MPa was achieved in gold tailings-based no-fire bricks with 2% modified TiO2 addition. Microscopic morphology and chemical analysis confirmed that the modified TiO2 significantly enhanced the structural integrity of gold tailings-based no-fire bricks.

Source: Environment Protection Engineering

DOI: 10.37190/epe250207

Authors: Yang Guohao, He Zhiming, Sun Jiawei, Guo Hao, Zhang Kai

Language: English

Topic: Recycling and utilization of industrial and municipal waste in materials production

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Responsible consumption and production

Open Access status: bronze

OpenAlex ID: W4412549148

FWCI:

Cites: 23

Cited by:

Related to: 10