CCIL laboratory testing Questions and Answers
When do lab cured cylinders need to be demolded?
20 +/- 4 hrs after casting time
When do field cured cylinders need to be demolded?
28 +/- 8 hrs after casting time
Previous
Play
Next
Rewind 10 seconds
Move forward 10 seconds
Unmu...
CCIL laboratory testing Questions and
Answers
When do lab cured cylinders need to be demolded? - answer 20 +/- 4 hrs after
casting time
When do field cured cylinders need to be demolded? - answer 28 +/- 8 hrs after
casting time
Why can lab cured cylinders be demolded earlier than field cured cylinders? - answer
This is because field cured cylinders will need to be transported to a lab so they need
the extra time to ensure that the cylinders set properly before being moved around.
When are cardboard moulds used? - answer For concrete <35 MPA
What temperature should the curing tanks be kept at and how often should they be
monitered. - answer Temp. should be at 23 +/- 2 C and temperature recorder should
be kept in the tank and checked twice a day at least 5 days per week accurate to 0.5 C.
What should the tanks be saturated with ? - answer Calcium hydroxide
What ratio should the cylinders length be to its diameter? - answer 2:1
Initial curing in "field" temp. ? - answer 15 - 25 C
When can the demoulding time for field cured cylinders be 76 hrs? - answer If the
following is provided:
i) 15 - 25 C
ii) Min. - max. recorded
iii) < 35 MPa
When is the mass of the cylinder recorded? - answer Immediately upon demoulding
How large should the bearing surface be? - answer The bearing surface must be
greater than 3% of the specimens diameter.
Bearing surface must not depart from a plane > 0.025 mm on the compression machine
and must rotate freely. - answer
Cylinder diameter must not deviate from another cylinder by more than 2%. - answer
What must the cylinder end be plane to? - answer No greater than 0.05 mm.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Pogba119. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
