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Mining waste, discarded polyester, and ground PET bottles have gained a new function in research conducted in Goiás, which transforms industrial waste into ecological bricks for civil construction, with rapid manufacturing, resistance comparable to traditional blocks, and possible use in affordable housing.
Researcher Hélio Elias da Silva developed ecological bricks from mining waste, polyester textile waste, and PET bottle powder, in research related to a Ph.D. in Environmental Sciences at the Federal University of Goiás.
Focusing on the reuse of materials discarded by the industry, the proposal transforms waste from different origins into blocks for civil construction, with application aimed at walls, partitions, slabs, and affordable housing.
The research was conducted in the Graduate Program in Environmental Sciences at UFG, under the guidance of Professor Nelson Roberto Antoniosi Filho, from the university’s Institute of Chemistry.
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In the composition of the bricks, iron and emerald mining waste, polyester fabric powder, and PET powder are used, materials that normally require proper disposal to reduce environmental impacts.
How the ecological brick is produced
Once prepared, the waste is placed in metal molds, pressed, and heated until forming the block used in construction.
According to Hélio Elias, the result shows quality comparable to that of soil-cement bricks, a material already known for not requiring the traditional firing applied to ceramic bricks.
In a publication about the research, IPOG, the institution where Hélio Elias appears as a Civil Engineering professor, reported that the mixture is heated at low temperature.
The same material indicates that the brick is ready in about three hours and has resistance comparable to traditional blocks used in construction.
The technology draws attention by bringing together three types of waste into a single solution aimed at civil construction.
Mineral waste, polyester scraps, and PET plastic cease to be treated merely as disposal and become part of a more durable product, intended for a sector that consumes a large volume of inputs.
Mining waste, fabrics, and PET become raw material
Among the central points of the study is the attempt to reduce the pressure on natural resources used in the conventional manufacturing of bricks.
The technique was presented as an alternative capable of avoiding the extraction of clay from the banks of streams and rivers, as well as the cutting down of native Cerrado trees used in ceramic burning.
The proposal also emphasizes the reuse of materials generated by production chains with a large volume of waste.
Mineral waste, synthetic fabrics, and plastic packaging appear at different stages of the industry and can cause impacts when not properly treated or disposed of.
In the case of PET bottles, the research gives a new role to an urban waste known for its presence in landfills, streets, and waterways.
When ground and incorporated into the brick mass, the plastic fulfills a role within a construction block, instead of just following disposal routes.
Textile scraps are included in the composition after being turned into powder, especially the polyester waste used in the experiment.
Combined with mining waste and ground PET, this material participates in forming the mass that gives rise to the ecological brick developed in Goiás.
Use in civil construction and affordable housing
According to information released about the project, the sustainable bricks were presented as a cheaper, more resistant, and environmentally correct alternative compared to traditional bricks.
The indicated applications include walls, partitions, and slabs, in addition to projects aimed at affordable housing, a social interest front linked to construction costs.
The relationship with affordable housing broadens the scope of the research because it brings together two frequent problems in the country.
While the construction of lower-cost housing remains a challenge, industrial sectors accumulate waste that needs proper disposal and can gain new value when safely repurposed.
However, to truly enter the productive sector, any alternative material needs to prove performance, durability, and safety.
Therefore, the comparison with soil-cement bricks and the indication of resistance similar to traditional blocks are important points to gauge the potential of the innovation.
UFG research gained exposure outside the laboratory
In addition to academic development, the project received visibility at events and scientific publications related to innovation.
UFG reported that the research was a finalist at the Falling Walls Lab Brazil, a competition focused on innovative projects held in Recife, which helped to increase the study’s visibility.
IPOG also reported that the work on ecological bricks made with mining waste and plastics was published in the international journal Remediation, by Wiley.
This type of recognition reinforces the scientific circulation of the research, although it does not indicate, by itself, that the product is commercially available on a large scale.
So far, public information treats the initiative as research and technological development, with potential use in civil construction and housing programs.
There is no reliable detail about industrial production, technical certifications, or a timeline for the possible market arrival of the bricks.
By reorganizing mining waste, textile residues, and discarded plastic into a new material, the research brings applied science closer to concrete environmental problems.
The proposal shows how civil construction can absorb alternative inputs when there is technical development, proper validation, and a search for solutions linked to the circular economy.
