Impact of drying on pore structures in ettringite-rich cements. (June 2016)

• Record Type: Journal Article
• Authors: Galan, I.; Beltagui, H.; García-Maté, M.; Glasser, F.P.; Imbabi, M.S.
• Is Part Of: Cement and concrete research. Volume 84(2016)
• Page Start: 85
• Page End: 94
• Publication Date: 2016-06
• Subjects: Drying (A) -- Mercury porosimetry (B) -- Pore size distribution (B) -- 3CaO·3Al2O3·CaSO4 (D) -- Ettringite (D); Cement -- Periodicals; Cement -- Research -- Periodicals; Concrete -- Periodicals; Concrete -- Research -- Periodicals; Ciment -- Périodiques; Béton -- Périodiques; Cement; Concrete; Periodicals; 620.135
• DOI: 10.1016/j.cemconres.2016.03.003
• Languages: English
• ISSNs: 0008-8846

Abstract

Abstract: Drying techniques affect the properties of cement pastes to varying extents. The effect of different drying techniques on calcium sulfoaluminate-based (C$A) cements and their constituent phases is reported for a range of simulated and commercial C$A pastes which are benchmarked against an OPC paste. The recommended methodologies used to dry samples were identified from the literature and include D-drying and solvent exchange. These methods were used in conjunction with mercury intrusion porosimetry (MIP) and X-ray powder diffraction (XRPD) measurements to assess the changes in pore structure and the damage to crystalline phases, respectively. D-drying and isopropanol exchange are the most satisfactory and least damaging methods for drying C$A based pastes.