Buying Guide

43 grade cement

53 grade cement

43 Grade cement is used in general Civil Engineering construction work i.e. brick masonry, plastering, pointing, flooring and in RCC Work etc. 53 Grade cement is used where high early strength in 1 to 28 days range is required. This cement is proposed mainly for RCC works, where a member takes high tensile stress.
Design Strength for 28 days= 430 kg/ sq cm Strength. 43 grade cement early strength is less but with time it will attain same strength as 53 grade Design Strength for 28 days= 530 kg/ sq cm Strength. 53 grade cement attains early strength. Does not increase much after 28 days.
In 43 grade cement the initial setting of cement is slow than 53 grade cement. In other words, the hydration process is not so fast i.e. release of heat is less as in case of 53 grade and micro cracking is less which is controlled by proper curing of concrete. Price slightly lower.. Due to faster hydration process, the concrete releases heat of hydration at much faster rate initially and release of heat is the highest in case of 53 grades. The heat of hydration being higher, the chances of micro-cracking of concrete is much greater. Thus during initial setting period of concrete, the higher heat of hydration can lead to the damage of micro-cracking within the concrete which may not be visible at surface. This cracking is different from shrinkage or cracks which occur due to faster dryness of concrete in windy conditions. Thus it is very essential to be very careful in advance that higher grade cement specially GRADE 53 SHOULD be used only where such use is warranted for making the concrete of higher strength and also where good quality assurance measures are in place by which proper precautions are taken to relieve the higher heat of hydration through chilling of aggregates or by proper curing of concrete Price slightly higher
Price is slightly Lower Price is slightly Higher

TMT Steel

Thermo-Mechanical Treatment (TMT), is a metallurgical process that integrates work hardening and heat-treatment into a single process which results in superior properties such as weldability, strength, ductility and bendability meeting highest quality standards at international level. Under thermo mechanical treatment of bars, the steel bars are made to pass through a specially designed water cooling system where these are kept for such a period that outer surface of bars becomes colder while the core remains hot. This creates a temperature gradient in the bars. When the bars are taken out of the cooling system, the heat flows from the core to the outer surface causing further tempering of steel bars thereby helping them in attaining a higher yield strength of steel.