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Muscle Strength Essay

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CHAPTER 5
EXPERIMENTAL STUDIES ON BOND STRENGTH BETWEEN CONCRETE BLOCK AND MORTAR AND BEHAVIOUR OF MASONRY
5.1 NEED AND IMPORTANCE The bonding between concrete block and mortar influences the structural performance of masonry. The two materials fail to act together in the event of separation between them. The factors affecting concrete block-mortar bonding and influence of bond strength on compressive strength of masonry are useful in understanding the structural behaviour of masonry. The bond strength is measured through shear bond test. The influence of mortar characteristics like compressive strength and bond strength on compressive strength of masonry is studied.
5.2 COMPRESSION TEST ON CONCRETE BLOCK MASONRY

The compressive strength …show more content…

Since the concrete block mortar interface is under shearing stress, the failure in shear bond is likely to occur at the interface. It is hence necessary to examine the strength of concrete block mortar joint under shear. The interface between concrete block and mortar is also subjected to compressive stress in the direction normal to the interface. It is hence necessary to consider the influence of normal compression on the shear bond strength
5.4.1 SHEAR BOND TEST USING CONCRETE BLOCK TRIPLETS

Shear bond strength of concrete block masonry is determined for two types of concrete blocks with 1:3 CM and 1:3 CSM. A concrete block triplet specimen is used to obtain shear bond strength of concrete block mortar joint. The joint thickness of the mortar of 10mm is maintained for all the 4 cases. Capping of 10mm thick (1:1 cement mortar) is provided for the top face of concrete block and bottom faces of the outer concrete blocks. Vertical load is applied gradually till the bond between concrete block and mortar joint failed. Hence shear bond strength is estimated and is calculated using the formula given below.
SBS = F/( (2*b*d))

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