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.
Keywords
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
DOI: https://dx.doi.org/10.21741/9781945291838-48
The article was published as article 48 of the book Non-Conventional Materials and Technologies
References
[1] ABNT – ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS, NBR NM 52 Agregado Miúdo – Determinação da massa específica e massa específica aparente (2009).
[2] ABNT – NBR NM 23 Cimento Portland e outros materiais em pó – Determinação da massa específica (2001).
[3] ABNT – NBR NM 248 Agregados – Determinação da composição granulométrica (2003).
[4] ABNT – NBR NM 76 Cimento Portland – Determinação da finura pelo método de permeabilidade ao ar (Método de Blaine) (1998).
[5] ACHE, Use of recycled aggregates for production of structural concrete. Asociación Científica del Hormigón Estructural, Madrid, 2005 (in Spanish).
[6] AENOR, EHE-08 regulation of structural concrete, Spain, 2008 (in Spanish).
[7] ALRIFAI, A.; AGGOUN, S.; KADRI, A.; KENAI, S.; KADRI, E.H. Paste and mortar studies on the influence of mix design parameters on autogenous shrinkage of self-compacting concrete. Construction and Building Materials, v. 47, p. 969-976, 2013. https://doi.org/10.1016/j.conbuildmat.2013.05.024
[8] ANDRADE, L.B.; ROCHA, J.C.; CHERIAF, M. Influence of coal bottom ash as fine aggregate on fresh properties of concrete. Construction and Building Materials, v. 23, p. 609-614, 2009. https://doi.org/10.1016/j.conbuildmat.2008.05.003
[9] BENABED, B. KADRI, E. H. AZZOUZ, L. KENAI, S. Properties of self-compacting mortar made with various types of sand. Cement & Concrete Composites, v. 34, p.1167-1173, 2012. https://doi.org/10.1016/j.cemconcomp.2012.07.007
[10] GEORGIN, J.F.; AMBROISE, J.; PÉRA, J.; REYNOUARD, J.M. Development of self-leveling screed based on calcium sulfoaluminate cement: modelling of curling due to drying. Cement & Concrete Composites, v.30, p. 769–778, 2008. https://doi.org/10.1016/j.cemconcomp.2008.06.004
[11] LE-BIHAN, T.; GEORGIN, J.F.; MICHEL, M.; AMBROISE, J.; MORESTIN, F. Measurements and modeling of cement base materials deformation at early age: The cause of sulfo-aluminous cement. Cement and Concrete Research, v.42, p. 1055-1065, 2012. https://doi.org/10.1016/j.cemconres.2012.04.004
[12] LIBRE, N.A.; KHOSHNAZAR, R.; SHEKARCHI, M. Relationship between fluidity and stability of self-consolidating mortar incorporating chemical and mineral admixtures. Construction and Building Materials, v. 24, p. 1262-1271, 2010. https://doi.org/10.1016/j.conbuildmat.2009.12.009
[13] LÓPEZ,D.C.; FONTEBOA B. G.; BRITO J.; ABELLA, F. M.; TABOADA, I.G.; SILVA, S. Study of the rheology of self-compacting concrete with fine recycled concrete aggregates. Construction and Building Materials. v. 96, p. 491-501, 2015. https://doi.org/10.1016/j.conbuildmat.2015.08.091
[14] MEHDIPOUR, I.; RAZZAGUI,M.S.; AMINI, K.; SHEKARCHI, M. Effect of mineral admixtures on fluidity and stability of self-consolidating mortar subjected to prolonged mixing time. Construction and Building Materials, v. 40, p. 1029-1037, 2013. https://doi.org/10.1016/j.conbuildmat.2012.11.108
[15] ONISHI, K.; BIER, T. Investigation into relations among technological properties, hydration kinetics and early age hydration of self-leveling underlayments. Cement and Concrete Research, v.40, p. 1034-1040, 2010. https://doi.org/10.1016/j.cemconres.2010.03.004
[16] PÉRA, J.; AMBROISE, J. New applications of calcium sulfoaluminate cement. Cement and Concrete Research, v.34, p. 671-676, 2004. https://doi.org/10.1016/j.cemconres.2003.10.019
[17] RAFIEIZONOOZ, M.; MIRZA, J.; SALIM, M. R.; HUSSIN, M. W.; KHANKHAJE, E. Investigation of coal bottom ash and fly ash in concrete as replacement for sand and cement. Construction and Building Materials, v. 116, p. 15 – 24, 2016. https://doi.org/10.1016/j.conbuildmat.2016.04.080
[18] SEIFERT, S.; NEUBAUER, J.; NEUNHOEFFER, F.G. Spatially resolved quantitative in-situ phase analysis of a self-leveling compound. Cement and Concrete Research, v.42, p. 919-927, 2012. https://doi.org/10.1016/j.cemconres.2012.03.012
[19] WYRZYKOWSKI, M.; GHOURCHIAN, S.; SINTHUPINYO, S.; CHITVORANUND, N.; CHINTANA, T.; LURA, P. Internal curing of high performance mortars with bottom ash. Cement & Concrete Composites, v. 71, p. 1 – 9, 2016. https://doi.org/10.1016/j.cemconcomp.2016.04.009
[20] ZHAO, Z,; REMOND, S.; Damidot, D.; Xu, W. Influence of fine recycled concrete aggregates on the properties of mortars. Construction and Building Materials, v.81, p.179-186, 2015. https://doi.org/10.1016/j.conbuildmat.2015.02.037
