CEMENT

[:ru]Ю Ц.Цз.[:en]Yu Q.J.[:] [:ru]профессор, Школа материаловедения и техники, Южно-Китайский технологический университет, Гуаньчжоу, Китайская Народная Республика[:en]Professor, School of Materials Science and Engineering, South China University of Technology, Guangzhou, People’s Republic of China[:]

[:ru]Чжан Т.С.[:en]Zhang T.S.[:] [:ru]доцент, Школа материаловедения и техники, Южно-Китайский технологический университет, Гуаньчжоу, Китайская Народная Республика[:en]Associate Professor, School of Materials Science and Engineering, South China University of Technology, Guangzhou, People’s Republic of China[:]

[:ru]Оуян П.[:en]Ouyang P.[:] [:ru]аспирант, Школа материаловедения и техники, Южно-Китайский технологический университет, Гуаньчжоу, Китайская Народная Республика[:en]Postgraduate, School of Materials Science and Engineering, South China University of Technology, Guangzhou, People’s Republic of China[:]

[:ru]Вэй Ц.С.[:en]Wei J.X.[:] [:ru]профессор, Школа материаловедения и техники, Южно-Китайский технологический университет, Гуаньчжоу, Китайская Народная Республика[:en]Professor, School of Materials Science and Engineering, South China University of Technology, Guangzhou, People’s Republic of China[:]

Alitinform №2-3 (39) 2015 г. 12-21 p.

Abstract

To achieve sustainable development of cement industry, utilization of industrial wastes to produce blended cement is highlighted world-widely. Recent advances in preparation of blended cements done by the authors’ research group are briefly reviewed in this paper. To obtain high initial packing density, a gap-graded particle size distribution was proposed based on close packing theory, then the hydration efficiency of cement clinker and supplementary cementitious materials (SCMs) was improved by arranging SCMs with high activity, cement clinker, SCMs with low activity or inert fillers in the fine, intermediate and coarse fractions of blended cement, respectively. High performance blended cements with only 25 % cement clinker were prepared according to the optimized matching principals proposed, gap-graded blended cements also presented superior volume stability and cracking resistance due to a uniform and dense microstructure. In addition, gap-graded blended cements show significant potential in CO₂ emissions reducing, resources and energy conservation.

Key words:

cement clinker; supplementary cementitious material (SCM); blended cement; optimized matching, particle size distribution