Wood Bottom Ash and GeoSilex: A By-Product of the Acetylene Industry as Alternative Raw Materials in Calcium Silicate Units

Abstract

The main objective of this research was to obtain calcium silicate units from alternative raw materials, such as the bottom ashes from the combustion of wooden boards (WBA), as a source of silica, and GeoSilex (G), a by-product with low energy and environmental costs generated in the manufacture of acetylene, as a source of lime. Once the raw materials were physically, mineralogically and chemically characterized, calcium silicate units were obtained by mixing different amounts of WBA residue (90–20 wt%) and G by-product (10–80 wt%). The mixtures were compressed at 10 MPa and cured in water for 28 days. The calcium silicate units were subjected to a wide experimental program that included the determination of physical properties (bulk density, apparent porosity and water absorption), mechanical properties (compressive strength), and thermal properties (thermal conductivity). Optimum values are obtained for calcium silicate units that contain a 1/1 WBA/G weight ratio, which have an optimal amount of SiO2 and CaO for the cementation reaction. The 50WBA-50g units have compressive strength values of 46.9 MPa and a thermal conductivity value of 0.40 W/mK. However, all calcium silicate units obtained comply with the European Standard EN 771-2: 2011 to be used as structural building materials.

Climate Change versus Economic Growth: Case of Greenhouse Apply a Study of European Union Countries and England from 2010 to 2019 Using Linear Regression and Neural Networks

“…South Africa), there has been developments in the mitigation of the building sector (increase in efficient material, transport, and waste) to limit and reduce the urban sprawl. One example regarding the increase in efficient of material is the GeoSilex [84], which converts CO 2 into limestone upon contact; a metamorphosis that causes the tile to increase in weight, but not size. Lasting 12 to 15 years, these tiles, more than pavements, are sustainable choices that offer respite for a city.…”

Effect of Wood Biomass Ash on the Mechanical and Thermal Performance of Compressed Earth Bricks

“…But its disadvantage is that they suffer from a lack of mechanical strength, cracking due to shrinkage and sensitivity to water. To remedy these problems, the researchers used different stabilizers namely cement, lime, natural materials, biomass waste and industrial by-products [5,6]. Compressed earth brick is considered a green building technique for future generations with sustainable solutions and energy saving [7].…”

“…Due to the growing concerns about the environmental impact of the production of building materials, as well as carbon emissions mainly related to construction and also to growing waste management issues, it is essential to develop innovative, sustainable and environmentally friendly products as an alternative material for a sustainable earth brick by recovering different types of recycled materials from waste and by-products low-energy, lowcarbon industrial [2,[5][6][7].…”

Investigation of Wood Biomass Ash on the Thermal Behaviour of Compressed Earth Bricks

“…The performance of this earth depends mainly on its hygrothermal behavior, which is directly related to thermal and hydric properties and can be characterized by thermal conductivity (Mansour et al, 2016;Balasubramaniam et al, 2021;Omar Sore et al, 2018), but its disadvantage is that they suffer from a lack of mechanical strength, cracking due to shrinkage and sensitivity to water. To remedy these problems, the researchers used different stabilizers namely cement, lime, natural materials, biomass waste and industrial by-products (Felipe -Sesé et al, 2020;Eliche -Quesada et al, 2021).It hasseveralecological,economicandenvironmentalbenefits.…”

“…The current challenge in the champ of building materials is oriented towards the recovery of wood ashresulting of combustion of biomass waste to ensure on the one hand an improvement in thermal properties and on the other hand, an energy saving (Mansour et al, 2016;Felipe -Sesé et al, 2020;Çiçek et al, 2015). The main objective of this study is to develop new, cost-effective and environmentally friendly building materials based on wood ash from the calcination of biomass waste.…”