Effect of rice husk ash (RHA) dosage on pore structural and mechanical properties of cemented paste backfill

Effect of the addition of silica obtained from rice husk on physicochemical and mechanical properties of fibercement

“…Fig. 3 a shows the abaxial or external surface of the rice husk, called the exocarp, which is characterized by having a symmetrical structure constituted by convex cells (presence of simple papillae) [ 4 ], which are separated by grooves and grains of silicon compounds dispersed over the entire surface ( Fig. 3 b).…”

“…However, it became established that asbestos causes incurable illnesses such as pulmonary asbestosis, mesothelioma, and poor-prognosis lung cancer after a latent period of 20–50 years [ 2 , 3 ]. For this reason, it had to be eliminated, which meant the implementation of other alternative materials such as slag mineral wools, rice husk (RH), amorphous silica, and refractory, organic, synthetic, glass [ 4 ] and acrylic fibers [ 5 , 6 ]. Law 1968 of 2019, banned the use of asbestos across the national territory of Colombia since 2021.…”

“…There RHA can be used in the production of biodiesel, the pyrolysis of RHA produces biochar that has been used to catalyze transesterification and esterification reactions [ 11 ]. This subproduct of the rice industry is also used in construction materials, mortars and concrete, rigid materials that have low tensile strength and low ductility, and which, because they contain cellulose, hemicellulose, and lignin, reinforce construction systems [ 4 ]. In addition, their incorporation in cement helps to reduce the use of reagents that generate CO 2 in its production [ 12 ].…”

Effects of slag-based cementitious material on the mechanical behavior and microstructure evolution of copper-base cemented tailings backfill

“…The cemented tailings backfilling (CTB) technique belongs to the category of filling mining methods. This approach entails proportionally mixing tailings, solid waste, water, and cementing materials to create a filling slurry Hou et al, 2021;Wang et al, 2022;Yang et al, 2018;Zhao et al, 2020). The resulting concoction is then conveyed to the designated goaf via either self-flowing or pumping mechanisms, after which it undergoes solidification to form a cemented backfill (Eker and Bascetin, 2022).…”

Cellulose nanocrystals from agricultural residues (Eichhornia crassipes): Extraction and characterization

“…Nevertheless, agro-residues are considered as lignocellulosic biomass and consist mainly of cellulose, hemicelluloses, lignin, besides other organic matters [ 2 , 3 ]. Currently, considerable works [ [4] , [5] , [6] ][ 7 ] have been conducted on agro-residues for reducing the risks associated with their disposal, and to promote their use in biofuels, construction, polysaccharide productions, and animal feed. Also, it was found that pyrolysis of these biomasses can yield biochar, bio-oil and bio-diesel [ 8 ].…”