Sulphate Resistant Portland Cement - SRPC - Printable Version

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Sulphate Resistant Portland Cement - SRPC - sushil35 - 08-08-2014

Sulphate Resistant Portland Cement

Properties

Applied at place where there is exposure to sulphate such as used in concrete below ground.

Higher content of Tetracalcium Aluminoferrite & reducing the Tricalcium aluminate to aluminium

Has darker color than OPC

SRPC is made by fusing together a precisely controlled blend of very finely ground limestone, shale and iron oxide at high temperatures to form cement clinker.

A small quantity of gypsum is added to this clinker before grinding to produce the final fine powder - Sulfate-resisting Portland cement.

SRPC is manufactured in a modern dry process works at Castlemungret, Co.

Limerick and is supplied either in bulk or in bags.


Advantages

Long Term Strength Development

A significant characteristic of SRPC is the ability to continue significant strength development beyond the normal 28 day period.
The benefits of this are obvious, considering that 28 days is a very short period in the life of most concrete structures.

High Strength Concrete

Studies have shown amazing benefits of the use of SRPC in high performance concrete.

The lower reactivity of the slag makes it easier to control slump in the first two hours that follow mixing, as well as to reduce the amount of heat developed during hydration at higher cement contents.

Heat of Hydration

Sulphate Resistant Portland Cement have a much lower heat of hydration than other cements, making them ideal for mass concrete work.

The lower heat of hydration results in smaller temperature gradients within mass concrete structures, thereby minimising thermal cracking.

Pure Water and Acid Attack.

The use of SRPC is recommended in applications where concrete is exposed to pure water and/or acidic conditions.

Examples are water pipes and reservoirs, soft drink factories and sewage works.

Sulphate Attack

SRPC provides higher resistance to sulphate attack for applications specifically requiring sulphate resistance.

Applications include sewage works and coastal environments.

Alkali Aggregate Reactivity

SRPC has been shown to reduce the risk of alkali aggregate reaction in concretes containing reactive aggregates.

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