Composition of Ordinary Portland Cement

The chief chemical components of ordinary Portland cement are: Calcium, Silica, Alumina, Iron. Calcium is usually derived from limestone, marl or chalk while silica, alumina and iron come from the sands, clays & iron ores. Other raw materials may include shale, shells and industrial byproducts. The chief compound which usually form in process of mixing:

Environmental Impact of Ordinary Portland Cement

There are lots of environmental impacts of Cement on our ecology. One of the major problems is emission of CO2 from the Cement industry. It is found that world yearly 1.6 billion tons production of cement covers 7% of carbon dioxide's yearly production. As CO2 is harmful for human health and also for the wild life. It causes many respiratory problems like asthma, bronchitis, and nasal infections.

Soil Cement - Definition, Use in Earthfill Dams & Embankments

In recent years soil cement as a facing material for earthfill dams has been found economical where suitable riprap is not available near the site. A reasonably firm foundation is preferred so that deformation after placement of soil-cement is not significant; however, no unusual design features need be incorporated into the embankment. Normal embankment

Manufacturing and Uses of Portland Cement

Cement can be defined as the bonding material having cohesive & adhesive properties which makes it capable to unite the different construction materials and form the compacted assembly. Ordinary/Normal Portland cement is one of the most widely used type of Portland Cement. The name Portland cement was given by Joseph Aspdin in 1824 due to its similarity in

Preparation and Properties of Lime Concrete

A concrete made from a mixture of lime, sand, and gravel is said to be as lime concrete. It was widely used before the lime was replaced by Portland cement. Since long, Lime has been used to make things like plaster and mortar. Lime is usually made by burning of limestone.Chemically; lime itself is calcium oxide (CaO) and is made by roasting calcite

Storage of Cements at Site - Do's and Don'ts

Cement refers to material which acts as a binding substance. In construction and civil engineering cement is used to bind structural members for construction of buildings, pavements, bridges, tunnels, roads and highways etc. Cement bags should not be stored in an enclosed area where the walls, roof and floor is not completely weatherproof. Cement bags must not be

Concrete Basics - Properties, Concepts and Composition

Concrete is made by mixing: Cement, water, course fine aggregates and admixtures (if required). The aim is to mix these materials in measured amounts to make concrete that is easy to: Transport, place, compact, finish and which will set, and harden, to give a strong and durable product. A concrete mix is designed to produce concrete that can be easily placed at the

Uses and Applications of Different Types of Cement

Portland cement is a type of cement, not a brand name. Many cement manufacturers make Portland cement. Types IA, IIA and IIIA are cements used to make air-entrained concrete. They have the same properties as types I, II, and III, except that they have small quantities of air-entrained materials combined with them. Normal Portland cement. Type 1 is general use

Types of Cement & Characteristics of each Type

Type V: When concrete is exposed to highly alkaline soil or water having high sulphate content then this type is used. This cement has a low C3A content so as to avoid sulphate attack from outside the concrete. Otherwise the formation of calcium sulphoaluminate and gypsum would cause disruption of conrete due to an increase in volume of resultant compounds.

Engineering Properties of Cement

Concrete is a compound material made from sand, gravel and cement. The cement is a mixture of various minerals which when mixed with water, hydrate and rapidly become hard binding the sand and gravel into a solid mass. The oldest known surviving concrete is to be found in the former Yugoslavia and was thought to have been laid in 5,600 BC using red lime

Types of Admixtures of Concrete & Cement

A material other than water, aggregates, or cement that is used as an ingredient of concrete or mortar to control setting and early hardening, workability, or to provide additional cementing properties. Admixtures are generally used to alter the properties of concrete (such as increased workability or reduced water content, acceleration or retardation of setting time,

Aluminous Cement or Calcium Aluminate Cements

This is the updated description for what used to be known as 'high-alumina cement' or HAC. The problem with this cement is that it is subject to what is known as 'conversion'.

Effect of Liquids on Strength of Cement

The project's goal was to see how different liquids other than water affect the strength of cement. The object of this project was to find out how to make stronger cement which might help buildings better survive earthquakes.