Characterization and properties of elephant grass ashes as supplementary cementing material in pozzolan/Ca(OH)2 pastes

Compressive Strength of Construction Materials Containing Agricultural Crop Wastes: A Review

“…The study found that the cement paste containing 20% of Pennisetum Purpureum ash have similar strength with the control paste and cement paste containing 20% of silica fume after 90 days of curing period. Similarly, the same facts agreed by Nakanishi et al [25] in which the main hydrated phases during the pozzolanic reaction in Pennisetum Purpureum paste consisted of C-S-H gels similar to silica fume paste. The study agreed that Pennisetum Purpureum ash can be cementitious materials as an alternative to traditional pozzolans.…”

“…The Pennisetum Purpureum grass have reasonable energy content and higher calorific value fuels also categorized as biomass materials [25]. At the present, Brazil has been used 100% of Pennisetum Purpureum grass as a renewable energy source in several thermoelectric power plant in their country which deposited a large quantities of ashes during direct burning process resulting in environmental problems [23,25].…”

“…The study shows that Pennisetum Purpureum fibres had tensile strength of about 40 to 60 MPa, which has similar range to wheat straw fibres strength. On the other hand, Haameem et al [25] investigated the mechanical properties of Pennisetum Purpureum (Napier) used as fibre or polyester composites. The extraction of Pennisetum Purpureum fibres were done through water retting process and then the fibres were alkali treated using sodium hydroxide (NaOH) solutions.…”

“…Pennisetum Purpureum ash were prepared through same process conducted by Nakanishi et al [25]. The physical and mechanical of blended cement paste with 20% replacement of cement with Pennisetum Purpureum ash were evaluated after 28, 60 and 90 days of curing period.…”

“…The Pennisetum Purpureum grass have reasonable energy content and higher calorific value fuels also categorized as biomass materials [25]. At the present, Brazil has been used 100% of Pennisetum Purpureum grass as a renewable energy source in several thermoelectric power plant in their country which deposited a large quantities of ashes during direct burning process resulting in environmental problems [23,25]. The extraction of ortho-silicic acid from ground water by the Pennisetum Purpureum grass has made the plant contained considerable content of amorphous silica, which made it has pozzolanic properties similar to rice husk and sugarcane bagasse [23,25].…”