Effect of the Residual Fine Elements and Contribution on Fresh Properties of Self-Levelling Mortars
H.D.S. Carvalho, M. Cheriaf, J.C. Rocha
Abstract. The self-levelling mortar are a fluid product that has as a low viscosity and high fluidity. This building material requires no vibration and levelling, having very low thickness ( 30 mm). The purpose of this study was to evaluate fresh properties of self-levelling SLU using three by-products: bottom-ashes, fine elements of quarry limestone and fine elements from recycled-concrete-waste. Portland Cement OPC was partially replaced by 0,10, 15 e 20% of fines. The water/binder was maintained constant at 0.50 and mix proportion 1:2 cement and sand (by weight) was used. Fresh properties were examined: plastic shrinkage, curling and and heat measurements using a semi-adiabatic calorimeter. A superplasticizer (polycarboxylate) was used to assure a fluidity. During drying (HR=50%) a mass loss was monitored. To the same cement content fine from bottom-ash act as efficiently to reduce a shrinkage. The curling phenomenon is high (more than 1,70 to mortar based on fine from recycled-concrete-waste. Higher early curling was obtained to mortar with quarry limestone. A good performance could be assured with ternary mixes with bottom ashes (curling less than 8mm). Self-levelling mortar systems with more than 20% of fine produced the mixes with negative effect on segregation and bleeding, so not recommended to self-levelling mortar purposes.
Bottom Ashes, Fine From CDW Aggregates, Self-Levelling Mortars, Fresh Properties, Shrinkage
Published online , 11 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: H.D.S. Carvalho, M. Cheriaf, J.C. Rocha, ‘Effect of the Residual Fine Elements and Contribution on Fresh Properties of Self-Levelling Mortars’, Materials Research Proceedings, Vol. 7, pp 505-515, 2018
The article was published as article 48 of the book Non-Conventional Materials and Technologies
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