DBPapers
DOI: 10.5593/SGEM2014/B62/S26.012

ECOLOGICAL MATERIALS FOR CONSTRUCTION

G. CALATAN , A. HEGYI , C. MIRCEA
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-21-6 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 2, 89-96 pp

ABSTRACT
This work is a study that includes comparative experimental research carried out on mixtures of soil, sand, lime, oil and other natural additives, used to manufacture
masonry bodies. Experimental tests were aimed at studying the physico-mechanical properties of materials and their variation depending on the additives used. The purpose of this experimental research was to fixing some optimum compositions for making masonry bodies used in the construction of green houses, energy-efficient and with low impact on the health of users, applying basic principles of traditional vernacular architecture and improving their knowledge using current technology. Based on the experimental results, it was found that: addition of sand has positive influences of density and linear shrinkage, reducing the risk of cracking and the compressive and flexural strength of tested specimens was influenced by the amount of sand introduced into the mix (maximum values of strength are obtained for the 65% ground - 35% sand). In the case of mixtures earth - sand – lime it was noted that linear shrinkage was small, but this is probably due to sand in the mixture. Unsatisfactory results in terms of mechanical strength and the density recorded indicated the need to reduce the amount of slurry lime in the mixtures. In the case of mixtures earth – different solutions (NaCl, NaOH and bone glue) it was noted that linear shrinkage are not significantly influenced by changing the liquid (water or other solution) and high mechanical strength are recorded but the apparent densities are below the allowable value according to the literature, which leads us to the idea of the possibility of improving apparent density by introducing controlled amounts of sand The experimental results showed that organic materials can successfully replace or minimize the use of traditional building materials (concrete, cement).

Keywords: Building from earth, compressive strength, flexural tensile strength, axial shrinkage