Friction Influence between Particles in the Behavior of Flow of Lime-Rendering Mortars
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 3
Abstract
The behavior and properties of rendering mortars, in the fresh state, are influenced primarily by particle grading, amount of water employed, and the shape and surface texture of particles. Production processes and application of rendering mortars demand an appropriate adjustment in their materials so that the plasticity and consistency need to be optimized allowing an appropriate execution of rendering. The friction between particles of sand is decisive in the rheological behavior of mortars. In this context, the present study evaluates the mortar flow behavior focusing on the influence of microfine content and grading of sands on friction angle of mortars. For experimental development, mortars that differ according to binder/aggregate ratios and aggregate grading distributions were used, in addition to using sands with different microfine contents. The mortar consistencies were established based on the cone penetration test. The mortars were tested to determine the internal friction angle using the direct shear test. The yield stress was obtained from the Vane test. The results indicate a relationship between the microfine content and the internal friction angle of the mortars, identifying a strong influences of friction under the behavior of flow of the rendering mortars.
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Acknowledgments
The authors would like to thank the following authorities:
•
The Testing Materials Laboratory of the University of Brasilia () for availability in carrying out the tests;
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The National Council of Scientific and Technological Development (CNPq) for research aid and scholarship grants; and
•
The Higher Education Personnel Improvement Coordination (CAPES) for granting scholarships.
References
Ancey, C., and Jorrot, H. (2001). “Yield stress for particle suspensions within a clay dispersion.” J. Rheol., 45, 297–319.
Associação Brasileira de Normas Técnicas (ABNT). (2003a). Agregados—Determinação da composição granulométrica, ABNT NBR NM 248, Rio de Janeiro, Brazil (in Portuguese).
Associação Brasileira de Normas Técnicas (ABNT). (2003b). Cal hidratada para argamassas, ABNT NBR 7175, Rio de Janeiro, Brazil (in Portuguese).
Associação Brasileira de Normas Técnicas (ABNT). (2006). Agregados—Determinação da massa unitária e do volume de vazios, ABNT NBR NM 45, Rio de Janeiro, Brazil (in Portuguese).
Associação Brasileira de Normas Técnicas (ABNT). (2009). Agregado miúdo—Determinação da massa específica e massa específica aparente, ABNT NBR NM 52, Rio de Janeiro, Brazil (in Portuguese).
ASTM. (1996). “Standard test method for preconstruction and construction evaluation of mortars for plain and reinforced unit masonry.”, Philadelphia.
Banfill, P. F. (1994). “Rheological methods for assessing the flow properties of mortar and related materials.” Constr. Build. Mater., 8(1), 43–50.
Bauer, E., Mota, N. M. B., Kraus, E., and Pereira, C. H. A. F. (2006). “Rendering mortars consistency and its relationship with water demand and fine particles content.” e-mat—Revista de Ciência e Tecnologia de Materiais de Construção Civ., 3(2), 91–102.
Bauer, E., Sousa, J. G. G., Guimarães, E. A., and Silva, F. G. (2007). “Study of the laboratory vane test on mortars.” Build. Environ., 42(1), 86–92.
Caputo, H. P. (1988). Soil mechanics and its applications, LTC, Rio de Janeiro, Brazil 234.
Cascudo, O., and Carasek, H. (2006). “Cone penetration test proposal for the production control of mortars in construction-site.” e-mat—Revista de Ciência e Tecnologia de Materiais de Construção Civ., 3, 77–90.
Esteves, L. P., Cachim, P. B., and Ferreira, V. M. (2010). “Effect of fine aggregate on the rheology properties of high performance cement-silica systems.” Constr. Build. Mater., 24(5), 640–649.
Ferraris, C. F. (1999). “Measurement of the rheological properties of high performance concrete: State of the art report.” J. Res. Nat. Inst. Stand., 104(5), 461–478.
Kwan, A. K. H., and Fung, W. W. S. (2009). “Packing density measurement and modelling of fine aggregate and mortar.” Cem. Concr. Compos., 31(6), 349–357.
Kwan, A. K. H., and Wong, H. H. C. (2008). “Effects of packing density, excess water and solid surface area on flowability of cement paste.” Adv. Cem. Res., 20(1), 1–11.
Lecompte, T., Perrot, A., Picandet, V., Bellegou, H., and Amziane, S. (2012). “Cement-based mixes: Shearing properties and pore pressure.” Cem. Concr. Res., 42(1), 139–147.
Lu, G., and Wang, K. (2011). “Theoretical and experimental study on shear behavior of fresh mortar.” Cem. Concr. Compos., 33(2), 319–327.
Mahaut, F., Mok, S., Chateau, X., Roussel, N., and Ovarlez, G. (2008). “Effect of coarse particle volume fraction on the yield stress and thixotropy of cementitious materials.” Cem. Concr. Res., 38(11), 1276–1285.
Sousa, J. G. G. (2005). “Contribution to the study of mortar coating properties on fresh state.” Dc.S. thesis, Univ. of Brasília, Brasília, Brazil.
Stefanidou, M., and Papayianni, I. (2005). “The role of aggregates on the structure and properties of lime mortars.” Cem. Concr. Compos., 27(9–10), 914–919.
Westerholm, M., Lagerblad, B., and Forssberg, E. (2007). “Rheological properties of micromortars containing fines from manufactured aggregates.” Mater. Struct., 40(6), 615–625.
Westerholm, M., Silfwerbrand, J., and Forssberg, E. (2008). “Influence of fine aggregate characteristics on the rheological properties of mortars.” Cem. Concr. Res., 30(4), 274–282.
Wong, H. H. C., and Kwan, A. K. H. (2008a). “Rheology of cement paste: Role of excess water to solid surface area ratio.” J. Mater. Civ. Eng., 189–198.
Wong, H. H. C., and Kwan, A. K. H. (2008b). “Packing density of cementitious materials: Part 1—measurement using a wet packing method.” Mater. Struct., 41(4), 689–701.
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© 2014 American Society of Civil Engineers.
History
Received: May 1, 2013
Accepted: Feb 27, 2014
Published online: Jul 21, 2014
Discussion open until: Dec 21, 2014
Published in print: Mar 1, 2015
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