Sulphate soil stabilisation with magnesium binders for road subgrade construction
| Autor: | S. Espuelas, A. Seco, B. García, J.M. del Castillo, S. Marcelino |
|---|---|
| Přispěvatelé: | Universidad Pública de Navarra. Departamento de Ingeniería, Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. ISC - Institute of Smart Cities, Nafarroako Unibertsitate Publikoa. Ingeniaritza Saila, Gobierno de Navarra / Nafarroako Gobernua |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Gypsum Subgrade 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology engineering.material complex mixtures law.invention law 021105 building & construction 0502 economics and business Geotechnical engineering Civil and Structural Engineering 050210 logistics & transportation Bearing (mechanical) Magnesium 05 social sciences Sulphate chemistry Mechanics of Materials engineering Engineering properties Gypsum marly soil Soil stabilisation |
| Zdroj: | Academica-e. Repositorio Institucional de la Universidad Pública de Navarra instname |
| ISSN: | 1477-268X 1029-8436 |
| Popis: | This paper analyzes the ability of magnesium oxide-based additives to stabilise a low bearing gypsum marly soil, in order to reach subgrade requirements. This soil was not adequate for stabilisation with lime or cement because of its high sulphate content. Binders considered in this investigation were composed of three reactive Mg products and by products, both with and without ground granulated blast furnace slags (GGBS). They were compared to two cements and an aerial lime as soil stabilisers in a laboratory investigation and a field trial. Laboratory tests showed that Mg products with GGBS reached strength results close and at times even better than those of cement. One of the Mg products was the only additive able to reduce the natural soil swelling. Leaching tests demonstrated the ability of the Mg products to reduce the soil leaching of substances like calcium, magnesium, sulphate and chloride. In field trials two of the Mg products combined with GGBS met the bearing capacity requirements for subgrades, in accordance with the Spanish standard. This work was supported by Gobierno de Navarra and Fondo Europeo de Desarrollo Regional [grant number 0011-1365-2018-000093]. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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