Improvement, characterization and use of waste corn cob ash in cement-based materials

Utilization of Corn Cobs Ash as Cementitious and Binary Cementitious Materials in Concrete and Cement-based Composites: A Review

“…Other reactors reported in the literature include rotary drums, fabricated chambers, charcoal-fired ovens, and open-air burning, as well. Analysis of reaction parameters revealed that the combustion of CC to CCA normally takes place at temperatures from 450 to 750 °C, although some studies mentioned temperatures above 1000 °C, and reaction times ranging from 2 to 10 h. According to Suwanmaneechot et al (2015), the selection of optimal combustion temperature and thermal treatment processes, such as calcination is critical to the quality of the ash and the cement-based composites produced.…”

“…The amorphous silica possesses favorable engineering properties, because of high SiO2, Al2O3, and F e 2 O 3 content (Bessenouci e t a l . , 2 0 1 1 ; Suwanmaneechot et al, 2015). Comprehensive characterization of CCA is done using advanced techniques, to evaluate the physicochemical properties, chemical composition, and mineral matter.…”

“…Results showed that the compressive strength and workability decreased with the addition of 10% CCA to concrete blends, whereas the insulation characteristics were improved. Suwanmaneechot et al (2015) examined the potential of CCA as supplementary materials for cement in concrete. The authors observed that the higher the composition of CCA used to replace cement, the higher the water requirement was.…”

Plant biomass ashes in cement-based building materials. Feasibility as eco-efficient structural mortars and grouts

“…Corn cob is an agricultural waste product obtained from maize or corn, both important elements of the food industry [37]. The corn cob ash is a fineness waste that is produced in the boilers of the animal feed industry [38] (Fig. 6).…”

“…The chemical composition of WSA, CSA, POFA and CCA also contains more than 70% of SiO2 + Al2O3 + Fe2O3. CCA has an oxide content around 72% when is treated at 600ºC for 4 hours (63.91% SiO2 + 4.01 % Al2O3 + 3.95 % Fe2O3 [38]) with a pozzolanic activity index of 103% (higher than 75%, and therefore a suitable value for being considered as pozzolanic material). WSA is composed by high amount of SiO2 (73.06%), being the rest of compounds in quite low proportion (Al2O3 3.90% and Fe2O3 1.75%) [62].…”