Chemical resistance of novel hybrid cement in various aggressive solutions

Author(s): I. Janotka, M. Bačuvčík, P. Martauz, J. Strigač
Paper category: Workshop
Book title: RILEM International workshop on performance-based specification and control of concrete durability
Editor(s): D. Bjegović, H. Beushausen, M. Serdar
ISBN: 978-2-35158-135-3
e-ISBN: 978-2-35158-136-0
Pages: 17 - 24
Total Pages: 8
Language: English

This work is aimed to investigate one-year impact of 5 % sodium sulphate and magnesium chloride solution as well as aggressive hydrochloride acid with pH in range from 3.5 to 4.5 on the mortar made of novel hybrid cement H-CEMENT. The findings of this impact on mechanical properties, microstructure and pore structure of the H-CEMENT mortar are related to the water curing and compared with the reference cement mortar made of CEM I cement (PC). Material composition of hybrid cement differs from those presented in EN 197-1 Standard as CEM I to CEM V cements. H-CEMENT represents a novel hybrid binder consisting of finely ground Portland cement clinker, granulated blast-furnace slag, fly ash and additives based on inorganic sulphates.

One-year of exposures in aggressive media observed by regularly-done visual control and by performing of non-destructive tests (dynamic modulus of elasticity and length changes), flexural and compressive strengths as well as by the XRD, TG/DTA/DSC, pore structure (MIP) techniques and chemical analyses indicates satisfactory high chemical resistance for hybrid cement. The used experimental methods confirmed only negligible evidence of clear symptoms of chemical attack in any aggressive solution within one-year exposure time.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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