Mr. Phiri has been awarded a contract of supplyingcoarse aggregates to Junxi Engineering company who
are working on Lusaka-Ndola dual carriage way. One of the conditionfor Mr. Phiri to supply the coarse
aggregates is having his own quarry site and to employ a material’sEngineer for quality control purpose
and technical advice. The material’s Engineer will give guidance onsite selection for coarse aggregates
which will be presented to the main contractor Junxi EngineeringCompany. You have been engage by Mr.
Phiri as a Material’s Engineer and the first task is to give him areport on the site selection for the quarry
site.
a. Write a technical report to Mr. Phiri on the site selection ofthe aggregates.
b. What is aggregate gradation, how is it carried out and itsimportance in concrete production for Civil
Engineering projects?
c. Propose material to use for access roads for the entrance andgive reason for selecting that material
d. What are air-entraining agent and what properties of concretewill be affected if air-entraining agent
is added?
