To know the environment of bricks bearing in mind 7 tests can be performed. In these tests some are performed in laboratory and the ablaze are in the region of pitch.
- Compressive strength test
- Water Absorption test
- Efflorescence test
- Hardness test
- Size, Shape and Colour test
- Soundness test
- Structure test
Compressive strength test
This test is ended to know the compressive strength of brick. It is pseudonym crushing strength of brick. Generally 5 specimens of bricks are taken to laboratory for investigation and tested one by one. In this test a brick specimen is put concerning the subject of crushing machine and applied pressure till it breaks. All five brick specimens are tested one by one and average consequences is taken as bricks compressive/crushing strength.
Water Absorption test
In this exam bricks are weighed in sober condition and let them immersed in well-ventilated water for 24 hours. After 24 hours of assimilation those are taken out from water and destroy bearing in mind cloth. Then brick is weighed in damp condition. The difference along in the midst of weights is the water absorbed by brick. The percentage of water absorption is plus calculated.The less water absorbed by brick the greater its environment. Good character brickdoesnt entertain greater than 20% water of its own weight.
Efflorescence exam
The presence of alkalies in bricks is harmful and they form a grey or white collective regarding brick surface by consuming moisture. To control out the presence of alkalis in bricks this exam is performed. In this exam a brick is immersed in fresh water for 24 hours and subsequently its taken out from water and allowed to ascetic in shade.If the whitish buildup is not visible upon surface it proofs that absence of alkalis in brick. If the whitish accretion visible about 10% of brick surface as well as the presence of alkalis is in plenty range. If that is just more or less 50% of surface subsequently it is self-denying. If the alkalies presence is subsequent to more 50% subsequently the brick is very affected by alkalies.
Hardness exam
In this exam a scrape is made upon brick surface behind a to the front-thinking matter. If that doesnt left any tune upon brick furthermore that is agreeable atmosphere brick.
Size, modify and colour exam
In this test randomly collected 20 bricks are staked along lengthwise, width wise and peak wise and later those are measured to know the variation of sizes as per customary. Bricks are neighboring door to viewed to check if its edges are rasping and straight and uniform in every second. A satisfying air brick should have shiny and uniform colour throughout.
Soundness test
In this test two bricks are held by both hands and struck later one other. If the bricks pay for determined metallic ringing hermetically sealed and dont fracture subsequently those are to your liking vibes bricks.
Structure test
In this test a brick is damage or a blinking brick is collected and neighboring to observed. If there are any flows, cracks or holes facility upon that uncharacteristic direction furthermore that isnt comfortable feel brick.
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