geopolymer bricks made of copper mine tailings. Conventional brick production requires clay, shale, and high kiln firing temperatures (900–1000 °C) [9]. Clay and shale are experiencing a ...
Investigations were carried out to develop stabilized cement copper tailing bricks using a waste generated by primary copper producing industry. The study reveals that good quality of stabilized ...
1. Introduction. Worldwide, industrial-scale mining generates a large volume of waste in the form of tailings residues and waste rock. According to the UNEP 2019 report (UNEP, 2019), copper production alone generates around 4 billion tonnes of tailings annually that should be disposed of.This volume is predicted to increase as our metal …
Several studies have been conducted to make building bricks from waste materials: Ahmari and Zhang studied the feasibility of using copper mine tailings to …
The research demonstrated that building bricks meeting ASTM specification C62-66 for grades SW and MW of FBS-type bricks can be produced from waste copper mill tailings. Waste tailings from accumulations at Magna, Utah, Anaconda, Mont., and Hayden, Miami, and San Manuel, Ariz., were dry-pressed into bricks, and the products were tested in ...
By selecting appropriate preparation conditions (NaOH concentration, initial water content, forming pressure, and curing temperature), eco-friendly geopolymer …
1. Introduction. Microbial induced calcium carbonate precipitation (MICP) is a naturally occurring biomineralization process which harnesses the metabolic capability of some microorganisms to induce calcium carbonate (CaCO 3) precipitation in the presence of urea and a calcium source (Cheng et al., 2020).The precipitation of …
From Fig. 11, it is possible to identify the main types of tailings that were covered by the studies, such as "gold mine tailing/gmt," "iron ore tailing/iot," "red mud," "copper mine tailing," and "vanadium tailing," in order of occurrences. It is also possible to identify the use of "sodium hydroxide/NaOH," "KOH ...
A Study on Preparation of Bricks Using Copper Tailing Waste In India, 4 million tons of copper tailings produce every year, out of which 25,000 tons produce in Khetri Copper Mines, Khetri, and Rajasthan. This research was undertaken to study the effects of copper mine tailings as a replacement of sand on the properties of concrete …
Request PDF | Production of green bricks from low-reactive copper mine tailings: Chemical and mechanical aspects | To achieve sustainable construction and respond to the ever increasing demand for ...
Another study that focused on the possibility of using geopolymers for eco-friendly brick construction found that this material has high acid resistance, rapid development of mechanical strength, ... Graphical representation of compressive and splitting tensile strength of copper mine tailing contents in concrete [18, Fig. 12, …
2.1 Preparation of Materials. The iron ore tailings used in the study were sourced from tailing dam (Fig. 2b) of beneficiation plant at Barbil iron ore mine of Odisha state, India. Processed clay was procured from a local established fired clay brick manufacturing company, particularly to take advantage of the traditional knowledge of …
The study was extended to a pilot-scale glass column filled with raw copper tailing mixed with Acidithiobacillus ferrooxidans at a flow rate of 3 L h-1. ... The mix-proportion clay bricks were ...
The mix-proportion clay bricks were cast with the tailing waste after bioleaching. The bricks showed better compressive ... The copper tailing waste was collected from Hindustan Copper Limited ...
This study presents a methodology for making bricks, in a cost-effective and environmentally friendly manner, using the tailings produced from iron ore mines in …
To date, heavyweight concretes have been produced from various heavy aggregates as radiation insulation materials, and their gamma ray absorption levels have been investigated. Many of the studies have used heavy aggregates instead of cement or coarse aggregates from composite material components. The present study prepared …
This paper studies the feasibility of utilizing copper mine tailings for production of eco-friendly bricks based on the geopolymerization technology. The …
Fig. 4. Compressive strength and mass loss of sand–lime brick vs. copper tailing content after freeze/thaw cycle. the strength decrement and the mass loss of the bricks increased. For the brick specimen B34 with 60% copper tailing, the compressive strength decreased from 11.2 MPa to 6.2 MPa, about 45% decreased, and the mass loss is as high ...
This paper studies the feasibility of enhancing the physical and mechanical properties and the durability of copper mine tailings (MT)-based geopolymer bricks with cement kiln dust (CKD). The effects of CKD content (0-10%), sodium hydroxide (NaOH) concentration (10 and 15 M) and initial water content (12-20%) on unconfined compressive strength ...
This study investigates the durability and leaching behavior of geopolymer bricks produced from low-reactive copper MT as the primary aluminosilicate precursor and slag as the supplementary cementitious material (SCM). Durability tests include fourteen (14) wet-dry cycles and fifty (50) freeze–thaw cycles, respectively. After the durability ...
The influences of the batch ingredients and the autoclaving processes on the properties of autoclaved sand–lime brick from low SiO 2 content copper tailing were studied. The results show that the copper tailing with low content of SiO 2 can be used to produce autoclaved sand–lime bricks meeting GB11945-1999 for Mu 15 sand–lime …
The results showed that geopolymer-based copper MT bricks can be produced to meet the ASTM requirements by properly selecting the preparing condition. Kiventerä et al. [14] investigated the application of sulphidic MT from a gold mine to produce geopolymer bricks. Sodium hydroxide solution (5 M, 10 M, and 15 M) was used as an …
Investigations were curried out to develop stabilized cement copper tailing bricks using a waste generated by primary copper producing industry. The study reveals that good …
This paper studies the feasibility of utilizing copper mine tailings for production of eco-friendly bricks based on the geopolymerization technology. The procedure for producing …
The current manufacturing of clay-fired and cement bricks has contributed greatly to anthropogenic global emissions and environmental damages. A possible solution that could be used to alleviate such environmental pressures is through the adoption of carbon neutral, microbial induced calcium carbonate precipitation (MICP) bio-bricks as a …
In this paper, we selected copper tailings as a representative case study. First, we used material flow analysis for copper tailings in Tongling City and then constructed a life cycle assessment model. Finally, we set up a detailed scenario analysis of the carbon reduction benefits of copper tailings resource utilization. The results show …
The production of building bricks from copper mill tailings by the dry press method encompassed drying, screening, mixing with color modifying and binding …
Production of green bricks from low-reactive copper mine tailings: Chemical and mechanical aspects. Arash Nikvar-Hassani, Hamidreza Vashaghian, Renee ... this study investigates the utilization of low-reactive copper mine tailings (MT) with slag (SG) as a supplemental cementitious material to produce green bricks based on the …
Worldwide, an issue of copper production is the generation of mine waste with varying characteristics. This waste can pollute natural environments, and in particular, the heavy metal emissions of the tailings may pose long-term consequences. Currently, life cycle assessments of mine tailings are hampered by both limited data availability in the …
This study investigates the durability and leaching behavior of geopolymer bricks produced from low-reactive copper MT as the primary aluminosilicate precursor …
