Use of different agro-waste ashes in concrete for effective upcycling of locally available resources

Charitha, V.; Athira, V.S.; Jittin, V.; Bahurudeen, A.; Nanthagopalan, Prakash

doi:10.1016/j.conbuildmat.2021.122851

Cited by 83 publications

(44 citation statements)

References 126 publications

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“…The thermal conductivity of 0.07 W/m K and sound absorption coefficient of 0.87 at 2500 Hz was noted for rice husk panels, and the values are comparable with other recycled products described elsewhere 18 , 19 . Many researchers have studied the application of agro-waste ashes from various resources viz., wood, rice husk, rice/wheat straw ash, sugarcane bagasse ash, etc., as a replacement for cement and aggregates 14 , 20 – 22 . Biomass obtained from agricultural residues has potential application in the production of biofuels, electricity, and heat, which can be utilised in various domestic and industrial applications 23 .…”

Section: Introductionmentioning

confidence: 99%

Performance behaviour of agro-waste based gypsum hollow blocks for partition walls

Singh

Maiti

Bisht

et al. 2022

Sci Rep

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Crop residue management is a massive problem in the agriculture sector. Agricultural waste in the form of stubble which is usually burnt in the farm fields, causes severe air pollution and poses a threat to the environment. The present study investigates the addition of agro-waste (rice straw) in gypsum hollow-core blocks for partition walls. Various compositions of agro-waste-based gypsum samples have been studied for compressive strength, thermal, sound absorption, sound transmission loss, and fire-resistant properties. The addition of rice straw in gypsum reduces the density and compressive strength of the test sample, thus making it lightweight for non-load bearing wall application. The thermal conductivity of the rice straw added gypsum samples show a decrease in thermal conductivity from 0.2 to 0.11 W/m K. Acoustic properties viz., noise reduction coefficient (NRC) increases from 25 to 45% with increase in rice straw addition and a decreasing trend in sound transmission class (STC) from 37 to 28 dB. The fire-resistant properties viz., surface spread of flame, and fire propagation index test have shown good fire-resistant properties. The agro-waste-based hollow gypsum blocks may be used as a promising material for drywall partitions owing to its thermal insulation, low density, good acoustic and fire-resistant properties.

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Section: Introductionmentioning

confidence: 99%

Performance behaviour of agro-waste based gypsum hollow blocks for partition walls

Singh

Maiti

Bisht

et al. 2022

Sci Rep

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“…The production of cement clinker is responsible for the release of 8–10% of CO 2 in the environment [ 2 , 3 ]. Overall, the construction industry is reported to be responsible for CO 2 emissions greater than 20% in the environment [ 4 ]. Since the production of cement is an energy-intensive process, the substitution of supplementary cementitious material (SCM) becomes a promising way to produce alternative binding material for the construction industry [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…Overall, the construction industry is reported to be responsible for CO 2 emissions greater than 20% in the environment [ 4 ]. Since the production of cement is an energy-intensive process, the substitution of supplementary cementitious material (SCM) becomes a promising way to produce alternative binding material for the construction industry [ 4 , 5 ]. In addition, the disposal of untreated waste materials from industries and agricultural lands in open-air landfills has always been an environmental concern [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

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Investigating Optimum Conditions for Developing Pozzolanic Ashes from Organic Wastes as Cement Replacing Materials

et al. 2022

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This research was performed to investigate the optimum conditions for developing pozzolanic ashes from organic wastes to be used as cement replacement materials. The organic wastes explored in the research are rice husk ash (RHA), wheat straw ash (WSA), and cow dung (CDA). When the organic waste is turned into ash, it develops a pozzolanic character due to the presence of silica. However, the presence of reactive silica and its pozzolanic reactivity depends on the calcination temperature, duration, and grinding. In this research, the organic wastes were calcined at three different calcination temperatures (300 °C, 400 °C, and 800 °C) for 2, 4, 6, and 8 h duration. The obtained ashes were ground for 30 min and replaced by 20% with cement. The samples containing ashes were tested for compressive strength, X-ray diffractometry (XRD), weight loss, and strength activity index (SAI). It was observed that the RHA calcinated at 600 °C for 2 h showed better strength. However, in the case of WSA and CDA, the most favorable calcination condition in terms of strength development was obtained at 600 °C for 6 h duration. The highest SAI was achieved for the mortar samples containing CDA calcinated at 600 °C for 6 h duration (CDA600-6H). The other two ashes (RHA and WSA) did not qualify as pozzolan according to the ASTM C618 classification. This was due to the presence of silica in crystalline form and lower surface area of the ash material. In this research, the ash was ground only for 30 min after calcination which did not contribute to an increase in the specific surface area and thus the pozzolanic activity. The materials ground for the higher duration are recommended for higher SAI.

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“…The use of vegetable ashes as SCMs is attracting interest as an option to contribute to turning the cement sector into a greener industry [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Durability of eco-efficient binary cement mortars based on ichu ash: Effect on carbonation and chloride resistance

Caneda-Martínez

Frı́as

Sánchez

et al. 2022

Cement and Concrete Composites

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Use of different agro-waste ashes in concrete for effective upcycling of locally available resources

Cited by 83 publications

References 126 publications

Performance behaviour of agro-waste based gypsum hollow blocks for partition walls

Performance behaviour of agro-waste based gypsum hollow blocks for partition walls

Investigating Optimum Conditions for Developing Pozzolanic Ashes from Organic Wastes as Cement Replacing Materials

Durability of eco-efficient binary cement mortars based on ichu ash: Effect on carbonation and chloride resistance

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