Circular economy strategy for the valorization of fly ash as a substitute for cement in monoliths (resistance and reactivity evaluation) DOI

Luisa F. Morales,

Katherine Herrera, Julián E. López

et al.

Environmental Progress & Sustainable Energy, Journal Year: 2023, Volume and Issue: 43(3)

Published: Nov. 14, 2023

Abstract Fly ash is currently a problem in different companies, mainly thermoelectric plants, which must follow production and consumption model that involves reusing, renewing, recycling, thus contributing to the circular economy. This work aims evaluate reactivity compressive strength of types ashes concrete monoliths. For this purpose, sugarcane bagasse (SCBA), bituminous coal (BC), untreated hazardous waste (RUD) were evaluated as replacements for cement. Monoliths mortars have been manufactured mixtures, taken curing room, their determined at times (up 28 days monoliths up 90 mortars), order check formation calcium silicate hydrate (CSH) gels. In monolith tests, best performances with SCBA BC, used manufacture mortars. On day 56, behavior replacement 30% fly (15% BC:15% SCBA) presents type H mortar behavior, better results than control. By 90, all had same resistance M even higher resistances demonstrates feasibility its use Portland cement low‐performance inputs. implies possible reduction impacts, both disposal sites emissions caused by construction industry,

Language: Английский

A review of current practice for life cycle assessment of cement and concrete DOI Creative Commons
Josefine A. Olsson, Sabbie A. Miller, Joshua Kneifel

et al.

Resources Conservation and Recycling, Journal Year: 2024, Volume and Issue: 206, P. 107619 - 107619

Published: April 27, 2024

Language: Английский

Citations

21
Suitability of sustainable sand for concrete manufacturing - A complete review of recycled and desert sand substitution DOI Creative Commons
Mohammad Nadeem Akhtar, Khaldoon A. Bani-Hani, Dima A. Husein Malkawi

et al.

Results in Engineering, Journal Year: 2024, Volume and Issue: 23, P. 102478 - 102478

Published: June 28, 2024

Workable, environmentally friendly, sustainable sand concrete was reviewed to replace river for production. The ecology and the biological balance will be preserved with help of carefully chosen sand. A systematic literature review (SLR) methodology employed extract data. study examined strength durability characteristics recycled desert from past published studies. Experimental results investigations indicate that prepared 30 % is best result compared 100 There an acceptable decrease in at 50 replacement, a significant reduction reported %. Compared sand, less durable. In addition, based on example used this study, replacement approximately 735 × 106 tons preserved. Finally, it concludes using make would economical beneficial environment.

Language: Английский

Citations

15
Effect of Iron Ore and Copper Ore Tailings on Engineering Properties and Hydration Products of Sustainable Cement Mortar DOI

E. P. Sumukh,

Bibhuti Bhusan Das, Salim Barbhuiya

et al.

Advances in Civil Engineering Materials, Journal Year: 2024, Volume and Issue: 13(1), P. 50 - 75

Published: March 21, 2024

ABSTRACT The prohibition of river sand mining has drawn the attention researchers in finding practicable alternatives. In approach these alternatives, it is essential to ensure minimal or zero impairment ecological balance, which can be mainly attained by making use industrial waste/byproducts. wastes from industry are major contributors causing environment, and their influence on stability mortars using as fine aggregates needs systematically investigated with view long-term performance concerns. Thus, present study explores applicability mine tailings optimum dosage cement investigating engineering properties microstructure development aid qualitative quantitative analysis associated hydration products. studies confirm that increased consumption portlandite for secondary reactions followed additional formation calcium silicate hydrate (CSH) aluminum (CASH) phases tailing-based helped achieving a quality microstructure. These formations CSH CASH also confirmed through Fourier transform infrared spectroscopy identifying shift Si-O-Si stretching vibration bands toward lower wavenumber. lowering calcium/silicate atomic ratio mineralogical compounds related x-ray diffraction patterns confirms same. Gismondine, chabazite, hillebrandite formed found take part refining pore structure. This enhanced tailing was verified modified Andreasen Andersen particle packing model. high-quality reflected hardened optimized mortar proportion 20 % iron ore 30 copper tailing.

Language: Английский

Citations

5
Strong Structure Formation of Ceramic Composites Based on Coal Mining Overburden Rocks DOI Open Access
Galiya Rakhimova,

Andrey Stolboushkin,

Olga Vyshar

et al.

Journal of Composites Science, Journal Year: 2023, Volume and Issue: 7(5), P. 209 - 209

Published: May 22, 2023

Currently, the amount of man-made waste worldwide is steadily increasing. It is, therefore, necessary to constantly look for effective ways utilization and recycling. also reduce use non-renewable resources impact on environment. The coal industry currently quite insignificant, amounting some 10% total volume. work aimed study properties raw materials processes structure formation during forming, drying, firing composite ceramic produced using overburden rock additives. work’s relevance lies in need solve environmental, economic, technological problems related mining waste. Experiments past prove possibility as additives production building materials. article presents results studies chemical, mineralogical, granulometric composition mining. Peculiarities composites based optimal fractional compositions from coal-mine were revealed. Organic chemical used correction improvement quality finished products. physical mechanical indices obtained samples determined, analysis which revealed that highly mineralized carbonaceous rocks solid provided a 2–2.5-fold increase strength product, 5.6% reduction water absorption, an product frost resistance by 20–25 cycles. aluminum oxychloride influence articles was reflected their absorption 8.2 7.0%, 10–12% compression, freeze–thaw 30–35 Research proved are close those conventional clays. With special preparation, they can be This will significantly cost bricks, make up shortage high-grade clay improve environmental situation. Nevertheless, further research into overburdens material technology warranted.

Language: Английский

Citations

11
Strategies for Achieving Sustainable Management of Offshore Sand Mining in Malaysia DOI Open Access

Parveen Farjan Ali,

Gerald Guan Gan Goh, Arnifa Asmawi

et al.

Sustainability, Journal Year: 2025, Volume and Issue: 17(4), P. 1679 - 1679

Published: Feb. 18, 2025

Urbanization and land development in Asia, including Malaysia, have led to an increase offshore sand mining activities, leading significant environmental social issues. Excessive extraction disrupts the ocean system equilibrium, necessitating sustainable management strategies. This study examined Malaysian practices recommend approaches be adopted. Using case studies involving interviews document analysis, data were collected from 34 participants six federal state government departments, business owners, technical agencies, community groups (including non-governmental organizations action consumer rights). The thematic analysis conducted revealed need for key strategies management: (1) institutional strengthening, (2) adopting flexible technologies, (3) implementing comprehensive policy measures, (4) fostering stakeholder engagement, (5) capacity building, (6) enhancing monitoring enforcement. bridges theoretical gap sustainability of by examining governance challenges faced proposing strategic enhancements. offers practical implications designing policies that strengthen regulatory frameworks improve mechanisms development. Ultimately, this underscores importance understanding structures their driving transformation regional contexts. Hence, it a valuable planning framework authorities, enabling effective timely decision making managing Malaysia.

Language: Английский

Citations

0
Raw and Pre-Treated Styrene Butadiene Rubber (SBR) Dust as a Partial Replacement for Natural Sand in Mortars DOI Open Access
Krzysztof Pikoń, Nikolina Poranek,

Marcin Marczak

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(2), P. 441 - 441

Published: Jan. 17, 2024

The circular economy (CE) is widely known for its emphasis on reducing waste and maximizing the use of resources by reusing, recycling, repurposing materials to create a sustainable efficient system. CE based 3R—reuse, reduce, recycle. aim this article styrene butadiene rubber dust (SBR) in building material, constituting secondary production SBR, which currently disposed as landfill. SBR partly intended replace natural raw material sand. purpose final it light weight, insulating properties, or ability absorb vibrations sounds. Various shares mortars were tested. Some used thermal pre-treatment at temperatures 200, 275, 350 °C. strength SEM results are presented. best treatment 275 maximum usage with 60% sand substitute. novel finding study possibility more than 30% (as substitute sand) thanks pre-treatment, whereby common ratio mortars.

Language: Английский

Citations

1
Life cycle assessment of manual toothbrush materials DOI Creative Commons
Marta Mazur,

Marco Ruggeri,

Livia Ottolenghi

et al.

Discover Environment, Journal Year: 2024, Volume and Issue: 2(1)

Published: July 22, 2024

Abstract Background A manual toothbrush is an indispensable tool for promoting and maintaining oral health worldwide but given the non-biodegradable non-recyclable thermoplastic materials from which it made, cannot be considered free of threats to environment. Therefore, also in light World Dental Federation's goals implement initiate policies sustainable dentistry, this study evaluates sustainability two most used bristles, namely nylon, silicone. Objectives The objective investigate optimal solution reduce environmental impact toothbrushes, how would change if only brush head was changed instead entire toothbrush. Methods Life Cycle Assessment Carbon Footprint were used. Four toothbrushes with nylon a handle polypropylene with/without silicone parts (N1, N2, N3, N4) one (Si1), other (Si2) evaluated. Results bristles more than all 18 categories, average values − 14%. In addition, eliminating could result savings 4.69 × 10 ‒3 kg CO 2 eq per based on results meet Dentistry's need its impact, ideal should lightweight, less superfluous material, impactful such as nylon. Conclusions concluding indications improving are therefore: (i) eliminate amount material; (ii) develop lighter models; (iii) models replaced rather

Language: Английский

Citations

1
Exploring the Synergy: Experimental and Theoretical Investigation of Steel and Glass Fiber Reinforced Polymer (GFRP) Reinforced Slab Incorporating Alccofine and M-Sand DOI Open Access

Vijayalakshmi Ravichandran,

Ravichandran Ramanujam Srinivasan,

Saravanan Jagadeesan

et al.

Open Journal of Civil Engineering, Journal Year: 2024, Volume and Issue: 14(03), P. 334 - 347

Published: Jan. 1, 2024

Language: Английский

Citations

1
Impact of concrete durability improvement on building life cycle carbon emissions: a case study of residential buildings in Northwest China DOI
Xiangchen Zhu, Zhiyong Liu,

Yunsheng Zhang

et al.

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(47), P. 57804 - 57821

Published: Sept. 18, 2024

Language: Английский

Citations

1
Integrated Techno-Environmental Analysis of Finely Ground Silica Sand in Sustainable Mortar Production DOI Creative Commons
Kamel Hebbache, Mourad Boutlikht, Abdellah Douadi

et al.

Buildings, Journal Year: 2024, Volume and Issue: 14(10), P. 3295 - 3295

Published: Oct. 18, 2024

The environmental impacts of cement production are becoming more urgent concerns. This study examined the mechanical characteristics when it is partially replaced with finely crushed sand. experimental program consisted three different levels sand fineness 459 m2/kg, 497 and 543 as well four substitution ratios 10%, 20%, 30%, 40%. A total thirteen combinations were formulated then evaluated. results demonstrated that increasing from m2/kg to substantially impacted compressive strength (CS), by up ratio 10% 40% reduced roughly An extensive techno-environmental evaluation showed replacing technically feasible environmentally advantageous. technique can decrease carbon dioxide (CO2) emissions around 40%, emphasizing its ecological benefits coinciding worldwide initiatives impact construction materials. In summary, this demonstrates advantages improving while minimizing footprint. It suggests be used a sustainable alternative in manufacturing, promoting use friendly methods.

Language: Английский

Citations

1