Answered: rais. The DU erials is as follows: CaO…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Transcribed Image Text:A cement factory in Teluk Sepanggar, Kota Kinabalu Sabah has produced a particular brand of Portland cement using limestone, kaolinite and sand. The three raw materials are pre calcined at 950°C, which drives off any carbon dioxide and water chemically with the minerals. The bulk oxide composition of the calcined materials is as follows: Limestone Kaolinite Sand CaO 100% A20, : 55% FezO3: 20% SIO2 45%; SiO2 80%; The bulk oxide composition of the resulting dinker is: Table 1.0 Bulk oxide composition Oxide % mass Molecular weight CaO 66.4 56 SiO2 23.1 60 5.3 102 Fe,O3 4.0 160 The free lime content of the clinker is 1.2% (molecular weight = 80), and if gypsum has not yet been added, what proportions of the four main cement compounds are potentially present? Your answer should be given to one decimal place. %3D a. b. How much sand is used as a percentage of the total mass calcined raw materials? If the manufacturer wanted to produce a Sulphate Resisting Portland cement, what changes would be made in terms of sourcing raw materials? C. Compare and contrast between Ordinary Portland cement and Sulphate Resisting Portland cement. d.

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