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Sub-Concrete Technology

Topic-Cement

Sem-6th

By

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Er. Sasmita Gochhayat

HOD,CIVIL ENGINEERING

AY:2021-2022

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Table of contents

  • Introduction
  • Raw materials of cement.
  • Manufacturing of cement.
  • Characteristics of cement.
  • Types of cement and their properties.
  • Grades of cement.
  • Function of cement.
  • Setting
  • Ratio of mixture
  • Storage of cement.
  • Uses of cement.
  • Conclusion.

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Introduction

  • Cement is a building material for binding bricks, stones or aggregates.
  • Uses for marking mortar or concrete.
  • cements natural and artificial .
  • Natural cement-burning and crushing of stones and lime.
  • Artificial cement-burning at high temperature and gypsum is added.

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Raw Material

Ingredient

Range

Approximate

Lime

60-65%

63

Silica

17-25%

21

Alumina

4-8%

6

Iron oxide

1-6%

3

Magnesia

1-3%

1.5

Calcium sulphate

3-5%

4

Sulphur

1-3%

1

Alkalies

0.2-1%

0.5

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Manufacturing of cement:-

  • Mixture of raw material(wet or dry)
  • Burning
  • Grinding.

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Storage guidelines

  • Away from moisture.
  • Storage period should in steel .if long, should be stored in steel drums.
  • Avoid jute bags.
  • More frequent delivery of smaller lots.
  • Damp proof sheds.
  • Bags should be stacked in piles, Not more then 10bags in a pile.
  • cover with tarpaulin.
  • Ensure FFIO.

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