Practice Step 6: Mix Calculations (trial Mixes) (17.5.6) - Design of Concrete Mix for Pavements

Practice: Step 6: Mix Calculations (Trial Mixes)

Lesson 17.5.6Design of Concrete Mix for Pavements

Practise this section

9 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define what a trial mix is.
Show hintHide hint
Think about testing a small sample before the main batch.
Question 2.
What is flexural strength?
Show hintHide hint
Consider how a beam would act under a load.
3Question 3.
What is the primary purpose of conducting trial mixes?
- To finalize the mix design
- To adjust ingredient proportions
- To calculate costs
Show hintHide hint
Think about why we test before producing the final mix.
4Question 4.
True or False: Flexural strength is not a significant consideration in pavement design.
- True
- False
Show hintHide hint
Remember the role of flexural strength in supporting weight.
Question 5.
A trial mix resulted in a flexural strength of 3.5 MPa, whereas the target is 5.0 MPa. Suggest a plan to adjust the mix to achieve this target.
Show hintHide hint
Consider how altering these two factors could influence the output.
Question 6.
During a durability test, a concrete mix shows failure under freeze-thaw cycles. What adjustments would you recommend for future mixes?
Show hintHide hint
What types of admixtures can help improve durability in harsh environments?

5 more questions in this section. Enroll free to practise them all.