Agro-industrial-based wastes as supplementary cementitious or alkali-activated binder material: a comprehensive review

Blesson, S.; Rao, Asha Udaya

doi:10.1007/s41062-023-01096-8

Cited by 21 publications

(3 citation statements)

References 109 publications

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“…Concrete is the most widely used material in the construction industry and Portland cement is the most widely used binder 1 , 2 . CO 2 emission caused by cement production is about 8–10% of total CO 2 emission 3 , 4 . The production of Portland cement requires high energy and causes air pollution besides carbon dioxide emissions causing climate change due to global warming 5 .…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of geopolymer mortars containing waste ferrochrome slag and fly ash for sustainable green building

Koçyiğit

2024

Sci Rep

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The aim of the present study, an attempt to shed light on the use of industrial-based wastes as alkali-activated binder (AAB) material is mainly. The present novel research work, the characterization of waste ferrochrome slag (FCS) and the performance of alkali-activated mortar consisting of fly ash (FA) were investigated. The characterization of used materials were carried out using advanced microstructural analysis techniques (XRF, XRD and SEM). A total of thirty two mortars are prepared using FCS (90–60%) and FA (10–40%) with 5 M, 10 M sodium hydroxide (NaOH), Na2SiO3/NaOH (SS/SH = 1 and 2) solution. All specimens were cured in an oven at 70 °C and 100 °C for 24 h. After oven curing, the geopolymer mortars were kept in the laboratory for 28 days and thermal and mechanical tests were applied to them. The A5 mixture (SS/SH = 1 with 10%FA, 90%FCS and 5 M NaOH) was found to be optimum in terms of thermal insulation properties, making it suitable for use in sustainable construction in terms of low energy cost through exterior insulation. The C8 mixture (SS/SH = 1 with 40%FA, 60% FCS and 10 M NaOH) was found to be optimum in terms of strength and durability, making it suitable for use in sustainable construction. As a result, in this study, an optimum mixture of waste FCS and FA was obtained and geopolymer building materials that provide thermal insulation and structural performance and are resistant to external influences were produced.

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Section: Introductionmentioning

confidence: 99%

Performance evaluation of geopolymer mortars containing waste ferrochrome slag and fly ash for sustainable green building

Koçyiğit

2024

Sci Rep

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“…In the present day, the rapid growth in infrastructure has created a demand for construction materials [1][2][3]. The combination of fine aggregate, coarse aggregate, and cement undergoes hydration to form concrete.…”

Section: Introductionmentioning

confidence: 99%

Application of Coffee Husk Ash as Partial Replacement of Fine Aggregate in Concrete

Bhandary,

Rao,

Shetty

et al. 2023

Sustainability

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The task of turning agricultural waste into practical construction and building materials has been placed before civil engineers. Coffee husk is produced in vast amounts due to the global commerce of coffee beans, which are incinerated into ash when used as fuel, producing coffee husk ash (CHA). Even though many researchers have worked on the utilization of CHA in concrete, they have been used as partial cement replacement but not as a replacement of aggregates. The experimental study of the performance of concrete on fine aggregate replaced partially with CHA is represented in this paper. The fine aggregate is replaced by 0%, 2%, 4%, 6%, and 8% by weight of CHA. The performance of the partially replaced fine aggregate with CHA is reviewed by considering the compressive strength and workability of fresh concrete and the splitting tensile strength, flexural strength, durability under acid and alkaline media, thermal conductivity, and rapid chloride permeability test of hardened concrete. The results indicate that the partial replacement of fine aggregate with 4% of CHA (CHA04) in concrete provides a positive impact to all the selected performance parameters. The compressive strength, flexural strength, and splitting tensile of the CHA04 mix were 43.4 MPa, 3.7 MPa, and 2.44 MPa, respectively, which were 28.4%, 19.35%, and 1.66%, respectively, greater than normal concrete mix (CHA00). Even the study of acid and alkaline attack on the CHA04 mix showed lesser strength reduction as compared to other mixes. The RCPT showed less chloride permeability, and the thermal conductivity is higher for CHA04, indicating lesser voids compared to other mixes. With the help of this investigation, it can be said that fine aggregate replacement with 4% CHA has the best strength and durability properties compared to regular concrete.

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“…The use of Ordinary Portland Cement (OPC) has led to a substantial amount of CO 2 emissions and ecological imbalance due to the depletion of natural resources. It is estimated that OPC production accounts for approximately 8-10% of global greenhouse gas emission (1) . To address this issue and promote environmental sustainability, it is crucial to explore the utilization of industrial and agricultural waste materials as an alternative in concrete production, thereby conserving resources and mitigating waste disposal problems (2) .…”

Section: Introductionmentioning

confidence: 99%

Workability and Compressive Strength of Self-Compacting Geopolymer Concrete Blended with Industrial and Agricultural Waste

Patel¹,

Shah²

2023

IJST

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Objectives: To investigate the effect of replacement of Rice Husk Ash (RHA) on the workability and compressive strength of Self Compacting Geopolymer Concrete (SCGC) blended with Ground Granulated-Blast Furnace Slag (GGBFS) for sustainable environment. Methods: GGBFS as an industrial waste and RHA as an agricultural waste were used as an aluminosilicate source materials for the development of SCGC. Use of RHA is popular for their considerable effects on the mechanical as well as microstructural properties of cement based binders as well as geopolymer binders. The SCGC mixes were prepared by replacing GGBFS with RHA at various proportions of 5%, 15% and 25%. The fresh properties of SCGC have assessed through "Slump Flow, V-funnel, L-Box and J-Ring test methods as per EFNARC" guidelines. Findings: Partial replacement of RHA decreases the workability. Replacement of RHA in SCGC beyond 5% reduces the compressive strength, yet the target strength (30MPa) of all mixes were achieved. SEM analysis with EDXS spectra shows the dense microstructure of optimum mix with 5% RHA replacement. The 28 days strength of 42.6 MPa for 5% RHA, 39.31MPa for 15% RHA and 31.59 MPa for 25% RHA were achieved at ambient temperature, which is 110%, 94% and 56% higher than control mix strength (MF-100% FA) at ambient temperature. Novelty: SCGC is a new concrete which fulfill the properties of both Geopolymer (GPC) and Self Compacting Concrete (SCC). Most of the investigations in SCGC have been performed using Fly Ash, Metakeoline, and GGBFS as a binder. In this experimental study, GGBFS as an industrial waste and RHA as an agricultural waste are used as source material to develop the SCGC.

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Agro-industrial-based wastes as supplementary cementitious or alkali-activated binder material: a comprehensive review

Cited by 21 publications

References 109 publications

Performance evaluation of geopolymer mortars containing waste ferrochrome slag and fly ash for sustainable green building

Performance evaluation of geopolymer mortars containing waste ferrochrome slag and fly ash for sustainable green building

Application of Coffee Husk Ash as Partial Replacement of Fine Aggregate in Concrete

Workability and Compressive Strength of Self-Compacting Geopolymer Concrete Blended with Industrial and Agricultural Waste

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