Dear Safi Ullah ,

Can you describe your question in more detail? I mean the types of strength that you are looking for.

Regards!

At load point the ASTM-519 is asking to use Pads or capping to prevent local failure.

In literature review i found that some of the researchers have not used either of them.

Dear Safiullah,

You need to refer ASTM code on "Standard Test Method for Diagonal Tension (Shear) in Masonry Assemblages". The code number is E519/E519M. According to this code, two steel loading shoes shall be used to apply the machine load to the specimen. The code says especially at the lower loading shoe, you need to place a gypsum capping material. Fill the space between the specimen and side confining plates with the capping material in order to avoid crushing at corners. You need to apply the capping for at least 2 hours before the testing.

I hope your question has been answered. If you want the ASTM guideline, then please email me: [email protected]

Best regards,

Padalu Pravin Kumar