سلام عليكم في البدء انا حابه اتحدث عن صناعة الارقمت ليكم العنواين كأنها في بحث عشان ماتتعبوا وتفتشوا النقاط كتير تمام وبتمني انكم جد تستفيدوا وقسمت الموضوع كاﻷتي : Historical account Definition Type Raw material Properties of raw material Manufacturing Preperation of raw material Kiln rotatory Chemistry of portland cement Setting of cement Environmental impact Potland cement industry Introduction: · Historical account: - 1821 J. Aspdin. (calcination of argillaceous limestone). - Hydraulic lime (2CaO.SiO2) · Definition: Literally a binder. Defined as “ A finely divided mixture of calcium aluminate and silicate which sets to hard mass when treated with water.” “The product obtained by pulverizing clinker consisting essentially of hydraulic calcium silicate, to which no additions have been made subsequent to calcinations other than water and/or untreated calcium sulfate, except that additions exceed 1.0% of other interground with the clinker at the option of the manufacturer.” Defined according to European Standard No. EN197.1 “Hydraulic material composed of 2/3 by mass of tri- and di- (calcium silicate), the remainder consisting of aluminum and iron-containing clinker phases and other compounds., In condition that the ratio of calcium oxide to silicon dioxide (CaO:SiO2)
Posted on: Thu, 25 Dec 2014 19:01:04 +0000
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