A first class brick when immersed in cold water for 24 hours should not absorb water(by weight) more than
Consider the following stages in the manufacturing Of bricks:
The correct sequence of these stages in the manufacturing of the bricks, is
The percentage of alumina in a good brick earth lies between
It is present either free as sand or in combination as silicate of alumina. Presence of silica prevents shrinking, cracking or warping of green brick. In the presence of lime and oxide of iron, silica fuses at lower temperature and provides the brick its hardness and durability.
The nominal size of the modular brick is
A brick of standard size - (190 mm x 90 mm x 90 mm) is recommended by BIS with mortar thickness, the size of such brick becomes (200 mm x 100 mm x 100 mm) and it is known as nominal size of modular brick.
Percentage of silica in a good brick earth lies between
Which of the following ingredients of the brick earth enables the brick to retain its shape?
The ingredients of good brick clay (percent) are:
(i) Silica (50 to 60)
(ii) Alumina (20 to 30)
(iii) Lime (2 to 5)
(iv) Oxide of iron
(v) Magnesia (< 1)
Consider the following statements:
A good soil for making bricks should contain
1. About 30% alumina
2. About 10% lime nodules
3. Small quantity of iron oxide
4. About 15% magnesia
Which of these statements are correct
For good bonding in brick masonry
For good bonding in brick masonry-
(A) All bricks need to be uniform in size.
(B) Bats must be used in each course wherever required to provide adequate bonding.
(C) The vertical joints in alternate courses should fall in plumb.
(D) Surkhi that is finely powdered broken bricks act as adulterant and is usually not used as an additive.
Match List-l with List-ll and select the correct answer by using the codes given below the list:
Presence of silica prevents shrinking, cracking or warping of green brick.
A small quantity of lime in finally divided or powdered state is desirable as it reduces shrinkage on drying and acts as flex during burning process enact enabling silica to fuse and bend the brick particles together, The colour of the brick ranges from light yellow to red depending upon the quantity of oxide of iron in clay.
The frog of brick is normally made on its