Material cycle realization by hazardous phosphogypsum waste, ferrous slag, and lime production waste application to produce sustainable construction materials

2021 ◽  
Author(s):  
Vsevolod Mymrin ◽  
Elaman K. Aibuldinov ◽  
Monica A. Avanci ◽  
Kirill Alekseev ◽  
Marco A. Argenda ◽  
...  
Keyword(s):  
Construction Materials ◽  
Production Waste ◽  
Sustainable Construction ◽  
Material Cycle ◽  
Lime Production ◽  
Phosphogypsum Waste

scholarly journals Materials From Hazardous Iron Ore Treatment Waste, Concrete Demolition Debris And Lime Production Waste to Increase Environmental Sustainability of Industrial Regions

2021 ◽  
Author(s):  
Vsevolod Mymrin ◽  
Ana Povaluk ◽  
Luana Cechin ◽  
Monica A. Avanci ◽  
Cleber L. Pedroso ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Iron Ore ◽  
Construction Materials ◽  
Solid Particles ◽  
Production Waste ◽  
Sustainable Construction ◽  
Natural Rock ◽  
Concrete Production ◽  
Ore Treatment ◽  
Lime Production

Abstract To prevent environment pollution by hazardous industrial dumps of iron ore treatment sludge, concrete production/demolition debris and lime production waste sustainable cement-less construction materials were developed for substitution of traditional natural raw components excavated in careers, irreversibly destroying natural bonds. Their ​​ axial resistance values on the 3rd day of hydration were till 2.34 MPa, on the 28th day - up to 3.94 MPa, on the 180th day 8.40 MPa and on the 365th day 10.22 MPa. The expanding coefficient on the 3rd day were till 2.13%, 2.51% on the 28th day, and on the 365th day 2.22%. Water absorption on the 28th day was 7.17 - 9.32% and decreases to 6.26 - 8.64% on the 90th day. All these characteristics correspond to the Brazilian norms. The physical - chemical processes of materials’ structures formation included alkaline dissociation of solid particles’ surface, with sol appearing and densification till transition to gel. Long-lasting gel compaction and densification to stone-like condition made its structure similar to natural rock materials - silica, opal, obsidian, perlite, pumice, amber, flask, etc. They can be used for production of road bases, concrete blocks and solid unburned bricks, among other sustainable construction materials.

Characterization of construction materials on the base of mortar waste, activated by aluminum anodization sludge and lime production waste

2019 ◽  
Vol 212 ◽  
pp. 202-209 ◽  
Author(s):  
Vsevolod Mymrin ◽  
Andrea Molinetti ◽  
Kirill Alekseev ◽  
Monica A. Avanci ◽  
Walderson Klitzke ◽  
...  
Keyword(s):  
Construction Materials ◽  
Production Waste ◽  
Aluminum Anodization ◽  
Lime Production

scholarly journals New composites from waste: iron ore, pulp, lime, and concrete

2020 ◽  
Vol 24 ◽  
pp. e6
Author(s):  
Cleber Luis Pedroso ◽  
Vsévolod Mymrine ◽  
Elizabete Yukiko Nakanishi Bavastri ◽  
Daniela Evaniki Pedroso ◽  
Alfredo Iarozinski Neto ◽  
...  
Keyword(s):  
Axial Compression ◽  
Iron Ore ◽  
Raw Materials ◽  
Construction Materials ◽  
Production Waste ◽  
Water Addition ◽  
Lime Production ◽  
Compression Resistance ◽  
Potential Use

This research aimed at the development of new composites for civil construction using only industrial waste, namely, iron ore tailings (IOT), pulp production waste (PPW), lime production waste (LPW), and concrete waste (CW). The characterization of raw materials was carried out through particle size, specific mass, hydrogen potential (pH), loss on ignition (LOI) tests, and scanning electron microscopy (SEM); and, it was analyzed axial compression resistance and SEM in the developed composites. The specimens for the resistance test were molded, always using the same four types of residues in the mixture, with only water addition and no other type of binder. The residues proportions used were, in percentage, 10% to 40% of IOT and PPW, 25 to 30% of the LPW, and 15% to 25% of CW, distributed in 19 different compositions, that is, the proportions' variation of the residues in each specimen. The specimens were tested at the ages of 3, 7, 14, 28, 60, 90, 180, 365, and 720 days of cure. The results indicated a slight increase in resistance with increasing curing time, with emphasis on compositions 16 and 17, whose 28-day axial compression resistance reached 4.07MPa and 6.92MPa, respectively. In these two compositions (16 and 17), the formation of new structures was observed in the materials due to the neutralization and dissolution of the surfaces, as the alkalinity gradually decreased over time, with the hydrogen potential (pH) around 7.50 that, consequently caused the synthesis of new amorphous and crystalline formations. In this context, the studies allowed to conclude that the association of industrial residues has potential use as civil construction materials, for instance, in concrete artifacts, besides contributing to the reduction of finite natural resources extraction. It also provides a correct destination for the waste disposed of inappropriately, that constantly menaces the environment and the society that lives around it.

scholarly journals Machine Learning Approaches for Prediction of the Compressive Strength of Alkali Activated Termite Mound Soil

2021 ◽  
Vol 11 (11) ◽  
pp. 4754
Author(s):  
Assia Aboubakar Mahamat ◽  
Moussa Mahamat Boukar ◽  
Nurudeen Mahmud Ibrahim ◽  
Tido Tiwa Stanislas ◽  
Numfor Linda Bih ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Construction Materials ◽  
Curing Temperature ◽  
Sustainable Construction ◽  
Support Vector ◽  
Learning Approaches ◽  
Artificial Neural Network Ann ◽  
Curing Regime ◽  
Alkali Activated

Earth-based materials have shown promise in the development of ecofriendly and sustainable construction materials. However, their unconventional usage in the construction field makes the estimation of their properties difficult and inaccurate. Often, the determination of their properties is conducted based on a conventional materials procedure. Hence, there is inaccuracy in understanding the properties of the unconventional materials. To obtain more accurate properties, a support vector machine (SVM), artificial neural network (ANN) and linear regression (LR) were used to predict the compressive strength of the alkali-activated termite soil. In this study, factors such as activator concentration, Si/Al, initial curing temperature, water absorption, weight and curing regime were used as input parameters due to their significant effect in the compressive strength. The experimental results depict that SVM outperforms ANN and LR in terms of R2 score and root mean square error (RMSE).

scholarly journals Innovative nanoparticle-based admixture for sustainable construction materials and technologies

◽  
2019 ◽  
Author(s):  
Van Bui ◽  
◽  
Chris Eagon ◽  
Steve Schaef ◽  
Paul Seiler ◽  
...  
Keyword(s):  
Construction Materials ◽  
Sustainable Construction

scholarly journals Innovation potentials for construction materials with specific focus on the challenges in Africa

2020 ◽  
Vol 5 ◽  
pp. 63-74
Author(s):  
Wolfram Schmidt ◽  
Mike Otieno ◽  
Kolawole Olonade ◽  
Nonkululeko Radebe ◽  
Henri Van-Damme ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Construction Materials ◽  
Cementitious Materials ◽  
Sustainable Construction ◽  
African Continent ◽  
Concrete Technology ◽  
Rich Diversity ◽  
The Rich ◽  
Basic Infrastructure ◽  
Industrialised Countries

Africa is urgently in need of adequate basic infrastructure and housing, and it is one of the continents where massive construction activities are on the rise. There is a vast variety of potentially viable resources for sustainable construction on the continents, and consequently, the continent can bring innovative, greener technologies based on local sources effectively into practice. However, unlike established concrete constituents from industrialised countries in the global North, most of the innovation potentials from the African continent have not yet been the focus of intensive fundamental and applied research. This clearly limits the implementation of more sustainable local technologies. This paper presents a case for the need to first appreciate the rich diversity and versatility of the African continent which is often not realistically perceived and appreciated. It discusses specific innovation potentials and challenges for cementitious materials and concrete technology based on local materials derived from sources on the African continent. The unique African materials solutions are presented and discussed, from mineral binders over chemical admixtures and fibres to reinforcement and aggregates. Due to the pressing challenges faced by Africa, with regards to population growth and urbanisation, the focus is not only put on the technological (durability, robustness and safety) and environmental sustainability, but also strongly on socio-economic applicability, adaptability and scalability. This includes a review of alternative, traditional and vernacular construction technologies such as materials-saving structures that help reducing cementitious materials. Eventually, a strategic research roadmap is hypothesised that points out the most relevant potentials and research needs for quick implementation of more localised construction materials.

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