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

Abstract

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.

Towards a circular economy: valorization of banana peels by developing bio-composites thermal insulators

“…The results support the role of adding polystyrene to improve the thermal conductivity performance of banana composites, according to Al-Kadhemy (2013) 30 , who stated that the material is qualified to be a thermal insulator when its thermal conductivity is less than 0.1 W/m.K. The thermal conductivity coefficient of pure banana peels was lower than corn stalk and gypsum (0.1999–0.1 W/m.K) (Binici, Aksogan, and Demirhan 2016) date and polystyrene (0.053 W/m.K) 31 and camilina and expanded perlite (0.082 W/m.K) 32 , and rice straw and gypsum (0.2–011 W/m.K) 33 . Meanwhile, the thermal conductivity coefficient of banana peel was higher than banana leaves and polystyrene (0.0183 W/m.K) 19 .…”

APPLICATION OF BIO-BRICKS & ITS BENEFITS

“…The blocks were also designed with a male-female joint to facilitate interlocking when building the walls. (Singh et al, 2022).…”

Rapid Prototyping Technologies: 3D Printing Applied in Medicine

“…In additive manufacturing, the material is laid out layer by layer in a predetermined path that reflects the shape of the printed object until the complete geometry of the object is obtained. Depending on the 3D printing process, additive manufacturing can be divided into four categories, including extrusion printing (fused deposition modeling (FDM) and bioprinting) [ 14 , 15 , 16 , 17 ], material sintering (selective laser sintering (SLS), electron beam manufacturing (EBM), stereolithography (SLA) and continuous liquid interface production (CLIP)) [ 18 , 19 , 20 , 21 ], material binding (binder jetting/inkjet and PolyJet) [ 22 ] and object lamination (laminated object manufacturing (LOM)).…”