Sulphate resistance of lime-based barium mortars

Karatasios, Ioannis, Kilikoglou, Vassilis, Thlakis, Panagiotis , Colston, Belinda and Watt, David (2008) Sulphate resistance of lime-based barium mortars. Cement and Concrete Composites, 30 (9). pp. 815-821. ISSN 0958-9465

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This work studies the effect of barium hydroxide on the sulphate-resistance of lime-based mortars when used as an additive material to the lime binder. The overall aim of the work was to study the potential of barium hydroxide to produce a mixed binder with lime, which is able to fix the sulphate ions, block the diffusion of sulphate solutions and, therefore, reduce the degradation rate of mixtures.
The durability of different mixtures was studied through sulphate salt crystallisation and acid rain simulation tests, along with the characterisation of their pore-space properties. X-ray diffraction (XRD), scanning electron microscopy (SEM/EDX) and inductively coupled plasma spectroscopy (ICP) were used for materials characterisation. Experimental results proved that barium hydroxide increases the durability of hardened mixtures against sulphate attack without affecting the microstructure characteristics.

Keywords:Restoration mortars, lime, barium hydroxide, acid attack, sulphates, conservation
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F110 Applied Chemistry
F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Life Sciences
ID Code:5097
Deposited On:26 Apr 2012 12:53

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