Slump test merit or debris will be notified later in the future. Below is a photo slump test apparatus.
When the concrete trucks to enter the site you want to remove concrete Nawaitu into your site, tu hold the first truck, lorry SHOULD ANY TESTS slump, but not for a test cube (we'll discuss it pn), ordered to remove the concrete truck Posted in cars less, lbh about half the contents of the car less, pastu he would scoop the concrete with the scoop about mcm ni lbh
http://www.bellhygiene.co.uk/images/19015.jpg
and enter into a cone.
http://www.hsc.csu.edu.au/engineering_studies/civil_structures/3828/images/slump_test.gif
LBH less mcmnila way, stepped foot on the ears, (I noticed the picture most of all, try to look at the bottom of the cone that, in terms of its sides there are 4 steel, stepped in to fix the cone tu situla not to move. Pastu enter into the concrete cone with the scope of mcm dlm second picture into a cone. Do not put a full, add 1 / 3 of it, jerking the rod pastu to compact as much as 25 times. Put another 1 / 3 and 25 times more shock to the concrete to solidify tu, and enter 1 / 3 and the last one last compacting 25 times with the rod. Pastu, throw the contents over the top, wait about 5 seconds, pull the handle (tgk picture at the top, there are pictures on the left and right).
As he pulled up, a little cone-tu kan pusing2 to avoid adhesion surface (surface tension) concrete and steel cone, the concrete will fall and compare it with a cone to put on the other side.
BCompare with a 300mm high concrete cone tu who collapsed ... ... OK? Why are the ruins of a test done and what should be done if too low or high, should reject these trucks when they fail they will be notified later.
This video I donwnload from youtube, I think the video ni was taken in India by apparatus which is used by them. Apparatus they are more easily distinguished when compared with biaa we use in Malaysia, especially when measuring the fall-out slump. Note the number hentakannya LBH less 30. That's OK as long as more than 25 ....
Question from Anonym edge collapse tests
The answer from me
What are the advantages of Demolition test? Em ... It has nothing to do with power, so do not easily me'reject 'failure to test the ruins / slump failed once. Test collapse / slump or workability workability test is test, test to determine whether the concrete can easily enter the reference or not, before the concrete delivered to site, usually the supplier will propose concrete rubble who was supposed to happen. However, if the concrete mix at the site, the ruins of who is allowed to 75mm, the kind of plain concrete mix jugak suppliers. By Spec PWD, Klaus 9.3.2.1
i) ± 25 mm or ± 1 / 3 of the "designed workability", whichever is the Greater.
So, we designed workability is 75mm,
If we take ± 25 mm, 75 mm ± 25 mm, a range of 50mm-100mm.
If we take ± 1 / 3, 75 mm ± 1 / 3, so the range is 50mm-100mm.
What to do if the test fails to collapse, according to ASTM C 94,
If the measured slump or water content falls outside the specified limits, a test check Shall be made immediately on another portion of the SAME sample. In the event of a second failure, the concrete Shall be considered to have failed the requirements of the specification.
This means that, when the slump is too high or too low, exceeding the range, remove the entire contents of the car less, a new sample ambik the truck and was once again, both also failed to reply in case we have the right to 'reject' fill in the same lorry. If you asked why di'reject ', where many jatuhannya, saying too bnyk water content, if less than, say, the concrete is too dry. But it must be remembered ...............................................
Normally, employees will ask that concrete damp for facilitating the work interesting concrete into molds ... This requires planning ahead of Engineers. During a trial mix, try to do all the same grade of concrete slump, but the high drop ..... maybe 120mm ....
As an example, a Grade 40 and Grade 40 Normal Pump Mix. G40 Mix Concrete Pump will see a little wet and falling slump on high but have the same strength. Discuss dl with a supplier what Mix 40Pump slump for, after the can, then do a test, usually 120mm. So, if you see the G40 Normal yg dtg to the site a bit dry ..... especially when the weather is hot, continue to point out the G40 Pump Mix suppliers. That's the best way of entering the water ..... REMEMBER, DO NOT ADD WATER WHEN IN LORRY SITE. Even though sometimes possible, provided control of water / cement rationya but better not ......
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