Brick Test: Water absorption test, Crushing strength test, Hardness Test, Shape and size test of brick, Soundness test, Efflorescence test of bricks
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🌀7 Brick Test to Decide Quality of Bricks
Brick is the earliest and thoroughly utilized building and construction product. Bricks are popular building and construction products is due to the fact that of their local and low-cost schedule, strength, resilience, dependability, and insulating property versus heat and noise.
Brick has a rectangle-shaped shape mainly utilized in building and construction. Bricks are produced by molding mass of appropriately proportioned earth in lumber or steel molds. The brick prepare from the mold is permitted to dry very first and after that charred in kilns created for the function.
The majority of basic brick has a rectangle-shaped shape and of such percentage that the length is usually two times the width plus the density of the mortar joint. Brick density is less than or at the most equivalent to the width of the brick. The basic size of brick is such that it can be quickly raised and managed with one hand. They do not need any lifting devices.
🔎Various Brick Test: 💬
It is necessary to perform some tests on the brick to evaluate its quality. These tests are:
(i) Water absorption test
(ii) Crushing strength test
(iii) Hardness test
(iv) Shape and size test
(v) Soundness test
(vi) Test for the existence of soluble salts.
1) Water Absorption Test:
There are 2 tests to identify the water absorption
(i) 24-hour immersion cold water test
(ii) 5-hour boiling water test
🧡i) 24-hour Immersion Cold Water Test: 🤍
- The dry specimen is put in an oven preserved at a temperature level of 105 to 115o C, till it obtains significantly continuous mass.
- After cooling specimen at space temperature level weight of specimen taped as W1.
- The dry specimen is then immersed totally in the water at a temperature level of 27 ± 2o C for 24 hours.
- Take out specimens from water and clean all water from its surface with a damp fabric.
- Complete weighing of the specimen, 3 minutes after the specimen has actually been gotten rid of from the water.
- Let this weight be W2.
- Water absorption after 24 hours immersion in cold water is provided by
- (W2 – W1) x 100 / W1
ii) 5-hour Boiling Water Test:
- The brick sample is dried in an oven at 105 to 115o C till it obtains continuous mass.
- Cool the brick sample at space temperature level and tape-record its weight (W1).
- The brick is immersed in boiling water for 5 hours.
- With brick immersed in water is permitted to cool at 27 ± 2o C.
- The brick sample is gotten and clean it with a damp fabric.
- Complete the weighing of the specimen in 3 minutes. Let it be W3.
- Water absorption, percent by mass, is provided by (W3 – W1) x 100 / W1
3) Efflorescence Test to discover soluble salt in Bricks:
- Soluble salt is available in brick, trigger efflorescence. The existence of such salts can be identified as follows.
- Place one end of the bricks in a 25 mm depth of water in a meal of minimum size 150 mm and depth 30 mm.
- The meal is made from porcelain, glass, or of glazed stonework.
- The experiment is carried out in a well-ventilated space in between 20 to 30o C till all the water in the meal is either soaked up by the specimen or is vaporized.
- After the specimen has actually dried, include a comparable amount of water to the meal and let it to be soaked up by the specimen for efflorescence after the 2nd evaporation.
- Efflorescence in brick is signified by nil, small, moderate, heavy or severe as specified listed below:
Nil: When a salt deposit is invisible, then it stated to be Nil.
Slight: When efflorescence does not cover more than 10% of the exposed location of the bricks, it is stated to be small.
Moderate: When the deposit of efflorescence is much heavier than small and does not cover more than 50 percent of the exposed location of the brick surface. There ought to not powder or flake of the brick exposed surfaces.
Heavy: When the deposit covers a location of 50 percent or more of the exposed location of the brick surface. Then it is stated to be efflorescence salts are heavy. There ought to not powder or be flaking of the brick exposed surfaces.
Serious: efflorescence is stated to be severe when there is powdering or flaking of salt on the exposed surface of bricks.
4) Crushing Strength Brick Test:
=> For this test well impact clay brick is chosen.
=> The leading and bottom face of bricks are grinded to supply smooth and even surface for the test.
=> The brick sample is then put in water at the space temperature level.
=> Clean leading flogs of brick and fills it with cement mortar (1 part cement and 1 part tidy coarse sand of grade 3 mm and down), shop under damp jute bags for 24 hours and after that immerse in tidy water for 3 days.
=> Take out the brick sample and tidy additional water from the surface.
=> Place the brick sample in between 2 plywood sheets, each 3 mm thick, with flat faces horizontal and mortar filled face dealing with upwards.
=> The brick sample in between plywood sheets is thoroughly embedded in the center of the compression screening maker.
=> Fix the gauge of the maker and tight it and begin using the axial load at a uniform rate of 140 kg/cm2 per minute till failure.
=> The optimum load on the dial gauge at the failure of the brick sample is kept in mind.
=> Compressive strength = optimum load at failure/ Base are of Brick.
5) Hardness Test:
The solidity of brick can be evaluated with the aid of the scratch of the fingernail. Try to scratch figure on brick, if no scratch is left on the surface of the brick, it is thought about to be having adequate solidity.
6) Shape and Size Brick Test:
The shape of bricks ought to be the genuinely rectangular shape and ought to have basic sizes per relative code of guideline.
7) Soundness Test:
The brick strength test is performed by striking 2 brick together. Striking of brick ought to discharge calling noise. It can be evaluated by the fall of brick. An excellent quality brick ought to not break, when made to fail on tough ground, from a height of about 1 m.