Influence of raw rice husk addition on structure and properties of concrete

Quality optimization in briquettes made from rice milling by-products

“…Targeting millers who also parboil rice is expected to increase the adoption rate of these briquettes, as this will reduce their dependence on firewood, which is becoming scarce, especially with increasing urbanization. Briquettes produced using husk only could be of added advantage, as the ash by-product could be used for building and construction (Khan et al, 2012;Yuzer et al, 2013) or in the local ceramic industry (Prasad et al, 2001;Andreola et al, 2013). Rice-husk briquettes can also be produced for companies that require rice husk as raw material.…”

“…These include the use of rice husk as biofuel for the generation of heat and electricity (Sookkumnerd et al, 2005;Goyal et al, 2008;Lim et al, 2012a), biosorption of heavy metals from single and mixed metal solutions (Krishnani et al, 2008;El-Shafey, 2010), vermicomposting for the production of organic fertilizer (Lim et al, 2012b), as animal feed after physical, chemical, or biological treatment (Vadiveloo et al, 2009), and as a support for solid-state fermentation (Kapilan and Arasaratnam, 2011). Rice husk ash (RHA), a product of rice-husk combustion, is useful as a material for building and construction (Khan et al, 2012;Yuzer et al, 2013), glass ceramic tiles and whiteware (Prasad et al, 2001;Andreola et al, 2013), reinforcement of aluminum alloy (Saravanan and Senthil Kumar, 2013), production of silica powder, activated carbon, and carbon-silica composite (Kumagai and Sasaki, 2009;An et al, 2011).…”

Use of biotechnological approaches to add value to rice hulls

“…Due to the beneficial pozzolanic effect, the fibers have the effect of improving the tensile strength of the material . Also, increasing amount of RH causes a decrease in density and compressive strength due to enhanced pore structure . Research was also carried out to utilize raw RH as insulation material, which are particularly important for agricultural constructions, because in general, farm buildings are short and carry low loads.…”

“…45 Also, increasing amount of RH causes a decrease in density and compressive strength due to enhanced pore structure. 46 Research was also carried out to utilize raw RH as insulation material, which are particularly important for agricultural constructions, because in general, farm buildings are short and carry low loads. Therefore, the strength of constructed buildings is not as important as heat isolation and construction cost.…”

“…49 Therefore, there is a great deal of current interest in the application of natural fibers in concrete materials, including the use of RH to replace PP and PVA. Yuzer et al 46 and Akturk et al 48 both showed that RH addition can be used in concrete production, can prevent explosive spalling, and can prevent releasing of harmful gases under high temperatures, being a suitable alternative to PP. Pakravan et al 44 Thus, at least the partial replacement of cement by RH or its ashes seems to be an alternative for development of eco-friendly civil construction.…”