Characterization of Cement Mortar Based on Fine Quartz

Authors: K. Arroudj, M. Lanez, M. N. Oudjit

Abstract:

The introduction of siliceous mineral additions in cement production allows, in addition to the ecological and economic gain, improvement of concrete performance. This improvement is mainly due to the fixing of Portlandite, released during the hydration of cement, by fine siliceous, forming denser calcium silicate hydrates and therefore a more compact cementitious matrix. This research is part of the valuation of the Dune Sand (DS) in the cement industry in Algeria. The high silica content of DS motivated us to study its effect, at ground state, on the properties of mortars in fresh and hardened state. For this purpose, cement pastes and mortars based on ground dune sand (fine quartz) has been analyzed with a replacement to cement of 15%, 20% and 25%. This substitution has reduced the amount of heat of hydration and avoids any risk of initial cracking. In addition, the grinding of the dune sand provides amorphous thin populations adsorbed at the surface of the crystal particles of quartz. Which gives to ground quartz pozzolanic character. This character results an improvement of mechanical strength of mortar (66 MPa in the presence of 25% of ground quartz).

Keywords: Mineralogical structure, Pozzolanic reactivity, quartz, mechanical strength.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1130083

References:

[1] P. C. Aitcin, “Binders for durable and sustainable concrete. Modern Concrete Technology”. Taylors and Francis Editions. London and New York. 2008
[2] J. D. Bapat. “Mineral Admixtures in Cement and Concrete” Taylor &Francis Group 2013
[3] N. Kaid, M.C yr, H. Khelafi. “Characterization of an Algerian natural pozzolan for its use in eco-efficient cement”, International Journal of Civil Engineering, A, Transaction A: Civil Engineering, V.13, No. 4, 2015 pp 444-454.
[4] H. Du, S. Du & X.Liu“Durability performances of concrete with nano-silica” Construction and Building Materials. V 73, 2014, pp705–712
[5] R. L. Sharma and S. P. Pandey, “Influence of mineral additives on the hydration characteristics of ordinary Portland cement”. Cement and Concrete Research, Vol 29, 1999, pp. 1525-1529.
[6] P. C Aïtcin, “High Performance Concrete”, Taylors and Francis Editions, 2004.
[7] M. Collepardi, The new concrete, Edition: Grafiche Tintoretto, 2006
[8] K.Arroudj, M.Lanez, M..N.Oudjit and A.Tagnit-Hamou “Comparative Study of Chemical Activity of Different Ultrafine Cementitious Additions”. International Journal of Advanced Materials Research, Vol 01, N°02, 2015, pp. 45-52.
[9] E. H. Kadri, A. Aggoun, G. De Shutter & K.Ezziane, “Combined effect of chemical nature and fineness of mineral powders on Portland cement hydration”. Materials and structures, Vol 43 N°5, 2010, pp. 665-673.
[10] J. C Benezet and A. Benhassaine, “Influence de la taille des particules sur la réactivité pouzzolanique de poudres de quartz”, Bulletin LCPC, Vol 19, 1999, pp 17-28.
[11] J. C Benezet and A. Benhassaine, “Contribution des populations granulométriques d’une poudre lors de la réaction pouzzolanqiue en pâte de chaux, Bulletin LCPC, Vol 235, 2001, pp 59-67.
[12] M. N. Oudjit; K. Arroudj, M. Lanez, A. Bali, and A. Tagnit-Hamou “Pozzolanic Reactivity of Siliceous Wastes» 11th International Conference on Concrete Engineering and Technology 2012 (CONCET2012) 12th –13th June 2012, Putrajaya, Malaysia.
[13] A. Zenati, K. Arroudj, M. Lanez, M. N. Oudjit “Influence of cementitious additions on rheological and mechanical properties of reactive powder concretes» Physics Procedia, volume 02, 2009, pp 1255-1261.
[14] K. Arroudj, A. Zenati, M. N. Oudjit, A. Bali and A. Tagnit-Hamou “Reactivity of fine quartz in presence of silica fume and slag”. Engineering, Vol 03, N° 06,2011, pp :569-576.
[15] A. Bessa “Etude de la contribution des additions minérales aux propriétés physiques mécaniques et de durabilité des mortiers » Thèse de doctorat de l’université de Cergy Pontoise, 2004.