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Building Materials - Engineering

Q1:

In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is

A right angles

B 45°

C 60°

D parallel

E None of these.

ANS:A - right angles

Stratified rocks are weaker when we put force parallel to the stratified layer of rocks it makes the rock break in parallel layer, however when we apply force perpendicular to the stratified layer of rock, it dose not break because it has numerous thin layer in that direction.

Stratified means naturally combination of parallel sheet of rocks due to metamorphic action, however we usually avoid stratified rocks for load bearing structure, instead we use non stratified rocks for load bearing structure.