Table of Contents
Is Coba a brick bat?
It is one of the oldest procedures of waterproofing, which consists of laying brickbats on the flat RCC roof and grouting the same with waterproofing compound with a slope to drain the surface water. …
What is the brick bat concrete thickness?
After the brick course is set, a 10 cm thick layer of brick-bat concrete is laid; consisting of 3 parts of brick bats, 1 part of gravel and sand and 50 percent of lime mortar by volume. The concrete is well-rammed for 3 days, so that the thickness reduces to 7.5 cm, by wooden hand beaters.
Is brick Bat Coba necessary?
Water leakage or seepage is one of the most common causes of any building defect and it reduces life of building structure significantly. Brick Bat Coba (BBC) is believed to be a waterproofing and insulation solutions in buildings. But unfortunately, Brick Bat Coba cannot provide solution for any of it.
How does brick bat Coba work?
It consists of putting brick bats on roofs, to give a slope and then grouting the same with mortar admixed with various proprietary chemicals most in the nature of waterproofing compounds. In the new construction house, it provides an excellent slope in a moderate cost, so that the water drains away.
What is the meaning of brick bat?
1 : a fragment of a hard material (such as a brick) especially : one used as a missile. 2 : an uncomplimentary remark.
What does COBA mean?
COBA
| Acronym | Definition |
|---|---|
| COBA | Commerce Bancorp, Inc. |
| COBA | Cost Benefit Appraisal |
| COBA | Corrections Officers Benevolent Association |
| COBA | Council of Business Affairs |
What is brick bat civil engineering?
“brickbat is brocken pieces of bricks”. bricks are more commonly used in the construction of buildings than any other material except wood. bricks can be made from variety of materials the most common being clay but also calcium silicate and concrete.
What is the finishing layer in brick bat Coba construction?
FINISHING LAYER The top surface is then finished smooth with 20 mm thick cement sand mortar, 1:4, admixed with a waterproofer. All liquid admixtures should be mixed with the mixing water. The surface when green is marked with 300 mm false squares. Curing is to be done by ponding.
What is hard as a brick bat?
The brick is placed on its side and the bats are removed ready for the next brick. This also ties in with Calvin Lawrence’s mother’s use of the term ‘as hard as a brick bat’ used when describing stale biscuits and bread. The brick bat is about the same thickness as a home made biscuit or a slice of bread.
What is queen closer brick?
: a closer that is less than half a brick specifically : a brick of full length and thickness but half width that is used at the end of a course next to the quoin header — compare king closer.
What is Koba English?
Webster Dictionary Kobanoun. any one of several species of African antelopes of the genus Kobus, esp. the species Kobus sing-sing.
What does COBA mean in Russian?
Noun. со́ва • (sóva) f (related adjective со́вов) owl (bird of order Strigiformes)
How big is a brick bat Coba roof?
The brick bat Coba materials are laid on the flat roof surface at the thickness of 75mm to 150mm with the cement mortar mix of waterproofing chemicals at the proper slope to drain out the water in the rainy season. Also, to prevent water penetration.
How big are the gaps between brick bats?
On the above green mortar, a layer of brick bats, soaked over night in water, is laid, having an average thickness of about 110 mm, about 70 mm near rain water pipe and 150 mm at ridge. The gaps between the brick bats are generally kept between 15 and 20 mm.
What kind of mortar to use for brick bat Coba?
Now apply the concentrated cement slurry on the roof surface and the parapet wall upto 300mm height at 2.5kg to 2.75 kg per sqm. After that, the 1:4 cement mortar mix (rough mortar) will be applied on top of the cement slurry at 25mm thickness. Now brickbats will be laid either 75mm or 150mm thick with 10 to 15mm gaps for filling the mortar.
Do you have to waterproof brick bat COBA before laying?
The brickbats shall be wholly burnt and are well soaked overnight before laying. Once after laying of brickbats, curing is carried out for a minimum of 24 hrs after which, the gaps between the brickbats are filled with the same mix mortar used for base coat.