@misc{10481/54880,
year = {2019},
month = {1},
url = {http://hdl.handle.net/10481/54880},
abstract = {Solid bricks manufactured out of clayey earth from a quarry near the city of Granada
(Spain) were studied and compared with others to which two additives were added during the
kneading of the raw material: Calcined diatomite sludge and sodium chloride. Samples with and
without additives were fired at 800ºC, 950ºC, and 1100ºC. New mineral phases were formed
in the bricks after firing. These included gehlenite, diopside, and plagioclase, which is gradually
enriched in calcium, and microcline, which is transformed into sanidine. Mullite and molysite also
appeared in the bricks made with added salt. Porosity increased substantially in the bricks that
contained diatomite sludge, while the addition of sodium chloride accelerated the mineralogical
transformations and caused sintering at relatively low temperatures of 800ºC. The bricks became
more compact and less anisotropic as the firing temperature increased. This behaviour was less
evident in the bricks with added diatomite sludge, which alters the orientation of the phyllosilicates.
The bricks fired at 1100º C had the best physical parameters. However, the bricks with added sodium
chloride fired at 800º C reached hygric and compactness values that were at least similar to bricks
from the other groups fired at 950º C.},
organization = {This study was funded by Junta de Andalucía Research Group RNM179, by Research Project
MAT2016-75889-R and by the Eureka SD project (agreement number 2013-2591), which is supported by the
Erasmus Mundus programme of the European Union.},
publisher = {MDPI},
keywords = {Solid bricks},
keywords = {Calcined diatomite sludge},
keywords = {Sodium chloride},
keywords = {Mineralogy},
keywords = {Physical changes},
title = {On the Use of Sodium Chloride and Calcined Diatomite Sludge as Additives to Improve the Engineering Properties of Bricks Made with a Clay Earth from Jun (Granada, Spain)},
doi = {doi:10.3390/min9010064},
author = {Elias, María Laura and Cultrone , Giuseppe V.},
}