Minimum cylinders should be 6 nos
2 cylinder - 7 days
2 cylinder - 14 days
2 cylinder - 28 days
What will happened if you take 1 sample and it's failed how you will verify the concrete strength.. Later.. You need to break the concrete. So it's safer to take minimum of 6 nos cylinder and...
Very rare case I seen Welding of torsional bars.. Usually we use 6010 or 7018 for Welding carbon steel metals.. 60 stands for 60k psi and 70k psi.. Low hydrogen electrode.
There might be various reasons for failure
1. Design failure
2. Load cannot be applied on concrete structure unless concrete receive 70 to 100% Strength.
3. Application of concrete, Concrete shall be poured within 45-60mins dispatch from the Batching plant.
4. Excess water content in...
All I seen a technicians place a Metal CONE adjustcent to the concrete.. And place a T-SQUARE On top and measure from Top end of CONE to TOP end of concrete sample.
1. After the lean concrete plastic sheet need to be spread to avoid moisture travel inside through Bottom portion of foundation.
2. Underground Exterior foundation shall be coated with Bitumen or Epoxy..and above ground Epoxy costing shall be done to protect the Rebars.
3. Rebars shall be...
Yes sir absolutly right depends upon climatic condition and usually within 24 hrs.. As far as Formwork intact moisture inside the foundation intact.. Yes I agree if surface area of open area is more than no doubt.. Like concrete slab I agree
Quality
Safe minimum requirement of Design is Quality..
Mercedes Benz and Maruti suzuki both are Quality Vehicles as far as both confirm the safe minimum design requirement.
Q. No. 2 Process of Concrete Pouring
Stage#1 Concrete Pre-pour Activity
Approval of Concrete Mix Design
Approval of Barbending schedule
Approval of Embedded steel/ anchor bolts
Calculate the CM3 concrete and required no. of pumps.
Inspection of Formwork, rebar works & Embedded steel &...
Start curing after 24 hrs of pouring
Stop : Every Batch of Mix 6 concrete cylinder will be taken to laboratory for Compression Test.
7 days, 14 days and 21 days
2cylinder, 2cylinder 2 cylinder
Suppose you pour concrete of 3000 psi to stop the curing you need to achieve 70%...
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