International Science Community Association Research Journal of Recent Sciences 2277 - 2502 1 4 2012 April 2 An Experimental Study on Separately Ground and together Grinding Portland Slag Cements Strength Properties 27 40 EN Pascal C. 1 Laboratoire d’Etude et de Recherche en Chimie Appiquée (LERCA), Ecoe Poytechnique d'Abomey-Calavi (EPAC), Universit� d'Abomey-Calavi (UAC), 01 BP 2009 Cotonou, REPUBLIC OF BENIN Agbangnan D. 2 Institut Pluridisciplinaire de Recherche sur l�Environnement et les Mat�riaux (IPREM), Universit� de Pau et des Pays de l�Adour (UPPA), UMR 5254 Technopole H�lioparc, 2 avenue du pr�sident d�Angot 64053 PAU Cedex, FRANCE Christine Tachon 3 Institut des Sciences Mol�culaires (ISM), Universit� de Bordeaux 1, CNRS UMR 5255 Batiment A12, 351 cours de la lib�ration, 33405TALENCE cedex, FRANCE Justine Dangou 4 Anna Chrostowska 5 Fouquet Eric 6 DominiqueC.K. Sohounhloue 7 Srivastava K.P. 1 Ganga Singh College, Jai Prakash University, Chapra-841 301, Bihar, INDIA Singh VikashKumar 2 Balamuralitharan S. 1 Department of Mathematics, Sri Ramanujar Engineering College, Chennai-48, INDIA Rajasekaran S. 2 Professor and COE, Department of Mathematics, BS Abdur Rahman University, Chennai-48, INDIA Nwajei G.E. 1 Dept. of Chemistry, Delta State University Abraka, NIGERIA Okwagi P. 2 Dept. of Chemistry, College of Education Agbor, NIGERIA Nwajei R.I. 3 Dept. of Botany, Delta State University, Abraka, NIGERIA Obi-Iyeke G.E. 4 Yousefi Z 1 Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, IRAN VefaAkpinar M. 2 Civil Engineering Department, Karadeniz Technical University, Trabzon, TURKEY > Research Paper 2012 2 21 2012 April 2 In this experimental study 7 and 28 day compressive, flexural strength and slag activity indices of Portland cement control and Portland slag cement were determined experimentally. The results of this study showed that the grinding time required for slag particles are higher than portland cement clinker particles for all the tested Blaine fineness values; therefore, the grind ability of the slag is observed to be lower than the grind ability of the clinker. The results indicated that the increasing the Blaine fineness values of the mortar mixes improved both the 7-day and 28-day slag activity indices. This means that in order to increase the quality of the slag, the granulated blast furnace slag particles should be ground to much finer. Together grinding Portland slag cements show higher strength values than the separately ground ones for the Blaine fineness values of 3000 cm2/g and 3500 cm2/g at 2 and 7 days. However, for Blaine fineness values of 4000 cm2/g and 4500 cm2/g, the separately ground Portland slag cements have higher strength values than the Together grinding ones at 2 and 7 days. For 28 days, the flexural strength of the Together grinding Portland slag cements show more or less the same values with the separately ground ones for all of the Blaine fineness values. Finally, the flexural strength of the separately ground Portland slag cements show higher values than the Together grinding ones again for all of the Blaine fineness values at 90 days. Copyright@ International Science Community Association