Question

In: Civil Engineering

Mr. Phiri has been awarded a contract of supplying coarse aggregates to Junxi Engineering company who...

Mr. Phiri has been awarded a contract of supplying coarse aggregates to Junxi Engineering company who
are working on Lusaka-Ndola dual carriage way. One of the condition for Mr. Phiri to supply the coarse
aggregates is having his own quarry site and to employ a material’s Engineer for quality control purpose
and technical advice. The material’s Engineer will give guidance on site selection for coarse aggregates
which will be presented to the main contractor Junxi Engineering Company. You have been engage by Mr.
Phiri as a Material’s Engineer and the first task is to give him a report on the site selection for the quarry
site.
a. Write a technical report to Mr. Phiri on the site selection of the aggregates.
b. What is aggregate gradation, how is it carried out and its importance in concrete production for Civil
Engineering projects?
c. Propose material to use for access roads for the entrance and give reason for selecting that material

d. What are air-entraining agent and what properties of concrete will be affected if air-entraining agent
is added?

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