{"title":"Characterization of Cement Mortar Based on Fine Quartz","authors":"K. Arroudj, M. Lanez, M. N. Oudjit ","volume":105,"journal":"International Journal of Structural and Construction Engineering","pagesStart":1278,"pagesEnd":1282,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10006917","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).<\/p>\r\n","references":"[1]\tP. C. Aitcin, \u201cBinders for durable and sustainable concrete. Modern Concrete Technology\u201d. Taylors and Francis Editions. London and New York. 2008\r\n[2]\tJ. D. Bapat. \u201cMineral Admixtures in Cement and Concrete\u201d Taylor &Francis Group 2013\r\n[3]\tN. Kaid, M.C yr, H. Khelafi. \u201cCharacterization of an Algerian natural pozzolan for its use in eco-efficient cement\u201d, International Journal of Civil Engineering, A, Transaction A: Civil Engineering, V.13, No. 4, 2015 pp 444-454.\r\n[4]\tH. Du, S. Du & X.Liu\u201cDurability performances of concrete with nano-silica\u201d Construction and Building Materials. V 73, 2014, pp705\u2013712 \r\n[5]\tR. L. Sharma and S. P. Pandey, \u201cInfluence of mineral additives on the hydration characteristics of ordinary Portland cement\u201d. Cement and Concrete Research, Vol 29, 1999, pp. 1525-1529. \r\n[6]\tP. C A\u00eftcin, \u201cHigh Performance Concrete\u201d, Taylors and Francis Editions, 2004.\r\n[7]\tM. Collepardi, The new concrete, Edition: Grafiche Tintoretto, 2006\r\n[8]\tK.Arroudj, M.Lanez, M..N.Oudjit and A.Tagnit-Hamou \u201cComparative Study of Chemical Activity of Different Ultrafine Cementitious Additions\u201d. International Journal of Advanced Materials Research, Vol 01, N\u00b002, 2015, pp. 45-52. \r\n[9]\tE. H. Kadri, A. Aggoun, G. De Shutter & K.Ezziane, \u201cCombined effect of chemical nature and fineness of mineral powders on Portland cement hydration\u201d. Materials and structures, Vol 43 N\u00b05, 2010, pp. 665-673.\r\n[10]\tJ. C Benezet and A. Benhassaine, \u201cInfluence de la taille des particules sur la r\u00e9activit\u00e9 pouzzolanique de poudres de quartz\u201d, Bulletin LCPC, Vol 19, 1999, pp 17-28.\r\n[11]\tJ. C Benezet and A. Benhassaine, \u201cContribution des populations granulom\u00e9triques d\u2019une poudre lors de la r\u00e9action pouzzolanqiue en p\u00e2te de chaux, Bulletin LCPC, Vol 235, 2001, pp 59-67.\r\n[12]\tM. N. Oudjit; K. Arroudj, M. Lanez, A. Bali, and A. Tagnit-Hamou \u201cPozzolanic Reactivity of Siliceous Wastes\u00bb 11th International Conference on Concrete Engineering and Technology 2012 (CONCET2012) 12th \u201313th June 2012, Putrajaya, Malaysia.\r\n[13]\tA. Zenati, K. Arroudj, M. Lanez, M. N. Oudjit \u201cInfluence of cementitious additions on rheological and mechanical properties of reactive powder concretes\u00bb Physics Procedia, volume 02, 2009, pp 1255-1261.\r\n[14]\tK. Arroudj, A. Zenati, M. N. Oudjit, A. Bali and A. Tagnit-Hamou \u201cReactivity of fine quartz in presence of silica fume and slag\u201d. Engineering, Vol 03, N\u00b0 06,2011, pp :569-576. \r\n[15]\tA. Bessa \u201cEtude de la contribution des additions min\u00e9rales aux propri\u00e9t\u00e9s physiques m\u00e9caniques et de durabilit\u00e9 des mortiers \u00bb Th\u00e8se de doctorat de l\u2019universit\u00e9 de Cergy Pontoise, 2004.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 105, 2015"}