Effect of Sodium Bentonite Clays on the Behaviours of Fresh Sprayed Mortars
Journal Title: Scholars Journal of Engineering and Technology - Year 2016, Vol 4, Issue 9
Abstract
Abstract:This paper presents an experimental study of mortars proportioned with various contents of bentonite. In comparable with a reference formulation, the effect of a bentonite-clay additive is investigated. To determine the adhesive properties the probe tack test was used. The tack test results have been exploited to identify the adhesion strength, the cohesion strength and the adherence force. It is found that the cohesion component monotonically increases with bentonite content. The behaviour of the adherence force is more complex, while the evolution of the adhesive force versus bentonite content displays optima depending upon the tack velocity. The rheological behaviour of the mortars was also considered. The comparison between adhesion tests and rheological measurements has shown that the cohesion force can be related to the yield stress identified on flow curves. Keywords:Bentonite clays; Rheological measurement; Pull-off test; Fresh mortar
Authors and Affiliations
Van Tien Phan, Trong Cuong Vo, Dinh Quoc Phan, Ngoc Hung Le
Keywords
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