Swine deep bedding ashes as a mineral additive for cement based mortar
DOI:
https://doi.org/10.1590/S0103-90162008000200001Keywords:
rice husk, pozzolanicity, vitreous silica, sustainabilityAbstract
The sustainability of intensive swine production demands alternative destinations for the generated residues. Ashes from swine rice husk-based deep bedding were tested as a mineral addition for cement mortars. The ashes were obtained at 400 to 600ºC, ground and sieved through a 325 mesh sieve (# 0.045 mm). The characterization of the ashes included the determination of the index of pozzolanic activity with lime. The ashes were also tested as partial substitutes of Portland cement. The mortars were prepared using a cement:sand proportion of 1:1.5, and with water/cement ratio of 0.4. Three percentages of mass substitution of the cement were tested: 10, 20 and 30%. Mortar performances were assessed at 7 and 28 days determining their compressive strength. The chosen condition for calcinations at the laboratory scale was related to the maximum temperature of 600ºC since the resulting ashes contained vitreous materials and presented satisfactory values for the pozzolanic index under analysis. The pozzolanic activity indicated promising results for ashes produced at 600ºC as a replacement of up to 30% in cement masses.Downloads
Download data is not yet available.
Downloads
Published
2008-04-01
Issue
Section
Agricultural Engineering
License
All content of the journal, except where identified, is licensed under a Creative Common attribution-type BY-NC.How to Cite
Swine deep bedding ashes as a mineral additive for cement based mortar . (2008). Scientia Agricola, 65(2), 109-115. https://doi.org/10.1590/S0103-90162008000200001