Thermal insulation enhancement of rammed earth using wood fly ash and calcium bentonite

Zarasvand, Kianoush Alasvand; Narani, Shayan Sheikhi; Siddiqua, Sumi

doi:10.1016/j.conbuildmat.2023.134097

Cited by 5 publications

(1 citation statement)

References 74 publications

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“…More importantly, the collapse of CDWRS dams highly threatened the life and property safety of human beings [47][48][49]; therefore, it was urgent to deal with CDWRS. For CDWRS, aluminosilicate minerals, such as montmorillonite, were the main mineralogical phases, showing great potential for use as nanopore-forming agents, to strengthen the thermal insulation performance of foamed concrete [39,[50][51][52], and contribute to the energy saving of building and the reduction of CO 2 emissions, which may be very vital in the sustainable development of society. Meanwhile, the successful utilization might also provide a promising approach to consume CDWRS, which could relieve environmental stress caused by waste accumulation, also contributing to sustainability of city development.…”

Section: Introductionmentioning

confidence: 99%

Pore Structure, Hardened Performance and Sandwich Wallboard Application of Construction and Demolition Waste Residue Soil Recycled Foamed Concrete

Yang,

Jin

et al. 2024

Sustainability

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Construction and demolition waste residue soil (CDWRS) recycled foamed concretes were prepared by introducing the original CDWRS into modified binders. Pore structure, hardened performance, and sandwich wallboard application were also investigated. The results indicated that 51 kg/m3 of water glass and 7.5 kg/m3 of gypsum could significantly increase the strength and generate a slight influence on the thermal insulation performance of CDWRS recycled foamed concrete. The largest enhancing rate of 28-day compressive strength at a density of 600 kg/m3 could reach 205.5%. Foamed concrete with 1126 kg/m3 of CDWRS, modified with water glass and gypsum, showed a low thermal conductivity of 0.11 W/(m·K) and a dry density of 626 kg/m3. In total, 988 kg/m3 of CDWRS in foamed concrete led to a compressive strength of 7.76 MPa, a thermal conductivity of 0.14 W/(m·K), and a dry density of 948 kg/m3. Utilization of the foamed concrete in the sandwich structure could fabricate energy-saving wallboards with a minimum heat transfer coefficient of 0.75 W/(m2·K) and a relatively high compressive strength of 16.5 MPa, providing great confidence of CDWRS consumption in the building energy-saving field.

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