Exam (elaborations)
ACI CERTIFICATION TEST -solved
- Course
- Institution
ACI CERTIFICATION TEST -solved
[Show more]
Content preview
ACI CERTIFICATION TEST -solvedWhat must occur before a sample of concrete can be taken from the revolving drum mixer? - Answer- All of the water must be added to the mixer
Describe the different procedures that can be used to collect a sample of concrete from a stationary or revolving drum mixer. - Answer- Repeatedly pass a receptacle through the entire discharge stream. Completely divert the discharge stream into a sample container.
What are the required steps for collecting a sample of concrete from a stationary or revolving drum mixer? - Answer- Collect two or more portions of concrete at regularly spaced intervals from the middle of the batch.
Describe the procedure for collecting a sample of pavement concrete deposited on grade. - Answer- Discharge the contents of the paving mixer. Obtain samples from at least five different portions of the pile
what is the minimum size for a sample when test specimens are to be molded? - Answer- 28L
What is the maximum allowable time between obtaining the first and final portions of the
composite sample? - Answer- 15 min
What is required after the concrete sample has been transported to the place where test
are to be performed? - Answer- Combine and remix the sample with a shovel
What should be done if the concrete contains aggregate larger than is appropriate for the size of the molds or equipment being used? - Answer- Wet sieving
Start the tests from slump, temperature, and air content within how many minutes after obtaining the final portion of the composite sample? - Answer- 5 min
Start molding specimens for strength tests within how many minutes after fabricating the
composite sample? - Answer- 15 min
From what must the concrete sample be protected? - Answer- Sun, wind, and rapid evaporation. Contamination.
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 millyphilip. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now