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Rodrigues, C.
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Publications (4/4 displayed)
- 2021Deformation and Anchoring of AA 2024-T3 rivets within thin printed circuit boardscitations
- 2019Mechanical and durability properties of a soil stabilised with an alkali-activated cementcitations
- 2017Characterization of Soil Treated With Alkali-Activated Cement in Large-Scale Specimenscitations
- 2008Active optical structures by use of PZT thick films ; Aktive optische Strukturen unter Verwendung von PZT-Dickschichten
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article
Mechanical and durability properties of a soil stabilised with an alkali-activated cement
Abstract
Alkali-activated cements (AAC) have been extensively studied for different applications as an alternative to Portland cement (which has a high carbon footprint) and due to the possibility of including waste materials such fly ash or slags. However, few works have addressed the topic of stabilised soils with AAC for unpaved roads, with curing at ambient temperature, where the resistance to wetting and drying (WD) as well as the mechanical properties evolution over time is particularly relevant. In this paper, silty sand was stabilised with an AAC synthesised from low calcium fly ash and an alkaline solution made from sodium silicate and sodium hydroxide. The evolution of stiffness and strength up to 360 days, the tensile strength, and the performance during WD cycles were some of the characteristics analysed. Strength and stiffness results show a significant evolution far beyond the 28th curing day, but still with a reasonable short-term strength. Strength parameters deduced from triaxial tests were found to be very high with stress-strain behaviour typical of cemented soils. Durability properties related to resistance to immersion and WD cycles were found to comply with existing specifications for soil-cement, giving validity for its use as soil-cement replacement.