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Bond :


The important assumption made in the theory of reinforced concrete is that there is a perfect bond between steel and concrete.they have to act together with out any slip. due to bond only the force will be transeferred to the steel from the surrounding concrete and to concrete from steel.

Bond stress:

Bond stress is the shear stress acting parallel to the bar on the interface between the reinforcing bar and the surrounding concrete.hence,it is the stress developed between the contact surface of steel and concrete to keep them together.its resists any force that tries to pull out the rods from the concrete.

Bond is developed due to combined effect of

a) adhesion between concrete and steel
b) friction (provided by gripping of bars due to shrinkage of concrete)
c) interlocking of ribs in bars with concrete

Bond stress depends on grade of concrete,diameter of the bar,bar profile condition,nature of force in the bar,grouping of bars,bends and hooks in the bar. the values of design bond stress precribed by IS 456-2000 are given


 

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Why use clc light weight  bricks or foam concrete bricks?
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Clc Size                      per cubic meter
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foaming agnet is our unique enzyme based foaming agent. This Foaming
Agent is manufactured in a unique
fermentation process and not through the main used method of
acid hydrolyzes. Our Making process enables us to separate exactly the
needed proteins for specific characteristics (stability, foaming characteristics,
etc.)
according to their molecular weight. This method leads to excellent products
with advanced characteristics and competitive prices. It causes no chemical
reaction with the surrounding matrix but serves solely as wrapping
material for the air to be encapsulated in the concrete (mortar)

Features:
protein based foaming agent it is used for cellular light weight bricks/blocks or foam concrete
bricks/blocksoam density 8…

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  concrete is a product obtained artificially hardening of the mixture of cement,sand,gravel and water in y
predetermined proportions,when these ingredents are mixed,they form a plastic mass which can be poured in suitable moulds,called forms,and set on standing into hard solid mass.the chemical reactions of cement and water,in the mix,is relatively slow and requires time and favourable temaperature for its completion.this timeknown as setting time may be divided into three distinct  phase first phase,