Sulfate soils stabilization with magnesium-based binders

Seco Meneses, Andrés; Miqueléiz Jiménez, Luis; Prieto Cobo, Eduardo; Marcelino Sádaba, Sara; García, Beñat; Urmeneta, Pablo

Publication:
Sulfate soils stabilization with magnesium-based binders

dc.contributor.author	Seco Meneses, Andrés
dc.contributor.author	Miqueléiz Jiménez, Luis
dc.contributor.author	Prieto Cobo, Eduardo
dc.contributor.author	Marcelino Sádaba, Sara
dc.contributor.author	García, Beñat
dc.contributor.author	Urmeneta, Pablo
dc.contributor.department	Proyectos e Ingeniería Rural	es_ES
dc.contributor.department	Landa Ingeniaritza eta Proiektuak	eu
dc.contributor.funder	Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa	es
dc.date.accessioned	2018-12-05T08:52:59Z
dc.date.available	2018-12-05T08:52:59Z
dc.date.issued	2016
dc.description.abstract	Sulfate soils' stabilization is a very interesting subject with technical, economic and environmental implications. The difficulty of their stabilization is due to the fact that the usual stabilizer additives are based on calcium. In these soils, sulfate combines with the calcium from the additive and the aluminum from the clay, resulting in a highly hydrated expansive mineral named ettringite. This provokes the swelling of the treated material and even its destruction. This study analyzes the result of the substitution of the calciumbased additives by one alternative additive based on magnesium, an industrial byproduct named PC-8, in the stabilization of five different sulfate soils. From a mechanical point of view soils treated with PC-8 reached similar resistance values to the lime treated ones, of about 2–3 MPa for 4% dosage and 2–5 MPa for 8% dosage, being usually better with the PC-8 results than with the lime ones. When PC-8 was combined with GGBS the resistance values increased up to 11–13 MPa and the lime-GGBS reached the 6–7 MPa. The natural swelling of the soils treated with PC-8 decreased substantially and maintained constant even for immersion at long-term. In the case of the soils treated with lime, long-termswelling increased up to very high values even in the case of soilswithout natural swelling. XRD analysis of these samples demonstrated the existence of ettringite in 4 of the 5 soilswhen theywere treated with lime and there was not expansive minerals in the PC-8 treated soils, agreeing with the swelling observed behavior of the soils when treated with both additives.	en
dc.description.sponsorship	This research has been supported by research project OTRI 2011021091 with Magnesitas de Navarra S.A. Company.	en
dc.format.mimetype	application/pdf	en
dc.identifier.doi	10.1016/j.clay.2016.10.033
dc.identifier.issn	0169-1317 (Print)
dc.identifier.issn	1872-9053 (Electronic)
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/31708
dc.language.iso	eng	en
dc.publisher	Elsevier	en
dc.relation.ispartof	Applied Clay Science, volume 135, january 2017, pp. 457-464	en
dc.relation.publisherversion	https://doi.org/10.1016/j.clay.2016.10.033
dc.rights	© 2016 Elsevier B.V. The manuscript version is made available under the CC BY-NC-ND 4.0 license.	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	Sulfate soil	en
dc.subject	Soil stabilization	en
dc.subject	Valorization	en
dc.subject	Construction material	en
dc.subject	Ettringite	en
dc.title	Sulfate soils stabilization with magnesium-based binders	en
dc.type	info:eu-repo/semantics/article
dc.type.version	Versión aceptada / Onetsi den bertsioa	es
dc.type.version	info:eu-repo/semantics/acceptedVersion	en
dspace.entity.type	Publication
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