Materials FE Civil Exam
What are the five major elements of a concrete mix?
Cement, Water, Coarse Aggregate, Fine Aggregate, Air, Extraneous Admixtures
The concrete slump represents what properties of a concrete mix?
Flowability/Workability
When the water to cement ratio is reduced, which mechanical properties of concrete are increased?
Strength and Durability
When the water to cement ratio is reduced, which mechanical properties of concrete are
decreased?
Workability
When the water to cement ratio is reduced, what is a solution to increase the workability of the mix?
Add Water Reducer to the mix
What pozzolanic materials can be added to a concrete mix?
Fly Ash, Silica Fumes, Slag
What are the benefits of adding pozzolanic materials to a mix?
Its more ecological and Economical, slows down the curing mechanism and provides enhanced
properties to the concrete
What Chemical Admixtures can be added to a concrete mix composition?
Water Reducers, Air-Entrained Admixtures
What effect do water reducers have on Concrete Mixes?
Allows you to maintain a constant water/cement ratio for a smaller cement ratio without
compromising the strength and increasing workability
What effect do air-entrained admixtures have on concrete mixes?
Increase Durability and workability of a concrete mix
How does having more coarse aggregate impact workability? Strength?
Increases, Decreases
How does having more fine aggregate impact workability? Strength?
Decreases, Increases
What are the types of Asphalt Mix Design?
Hot Mix Asphalt (HMA)
Cold Mix Asphalt (CMA)
What are the five major elements of a concrete mix?
Cement, Water, Coarse Aggregate, Fine Aggregate, Air, Extraneous Admixtures
The concrete slump represents what properties of a concrete mix?
Flowability/Workability
When the water to cement ratio is reduced, which mechanical properties of concrete are increased?
Strength and Durability
When the water to cement ratio is reduced, which mechanical properties of concrete are
decreased?
Workability
When the water to cement ratio is reduced, what is a solution to increase the workability of the mix?
Add Water Reducer to the mix
What pozzolanic materials can be added to a concrete mix?
Fly Ash, Silica Fumes, Slag
What are the benefits of adding pozzolanic materials to a mix?
Its more ecological and Economical, slows down the curing mechanism and provides enhanced
properties to the concrete
What Chemical Admixtures can be added to a concrete mix composition?
Water Reducers, Air-Entrained Admixtures
What effect do water reducers have on Concrete Mixes?
Allows you to maintain a constant water/cement ratio for a smaller cement ratio without
compromising the strength and increasing workability
What effect do air-entrained admixtures have on concrete mixes?
Increase Durability and workability of a concrete mix
How does having more coarse aggregate impact workability? Strength?
Increases, Decreases
How does having more fine aggregate impact workability? Strength?
Decreases, Increases
What are the types of Asphalt Mix Design?
Hot Mix Asphalt (HMA)
Cold Mix Asphalt (CMA)
