Concrete Mixer Devices Quiz

What is the purpose of using ACI 211.1 Standard Practice in concrete construction?

How long is PCCP designed to last when constructed with good concrete?

What is a key reason why a good asphalt road is preferable to a good cement concrete road?

Which of the following is NOT one of the five basic requisites of road building as mentioned in the text?

What is a key difference between quality control in asphalt pavement construction and other structures?

Which type of testing is specifically NOT mentioned as a quality control measure in the text?

What happens when there is little or no quality control exercised in concrete construction?

Why is good asphalt preferred over good cement concrete according to the text?

What aspect of road building is NOT explicitly mentioned as one of the five basic requisites?

What makes good asphalt road preferable over good cement concrete road according to the text?

Concrete Mixer

A device that combines cement, aggregate (sand/gravel), and water to form concrete.
Typically uses a revolving drum to mix the components.

Quality Control Procedures

Selection of materials
Handling and storage of materials
Sampling and testing of materials
Proper construction methods
Inspection and project monitoring

Selection of Materials

Raw materials (soil, sand, bank/river gravel)
Processed materials (washed/manufactured sand, crushed rock/gravel)
Manufactured materials (bituminous materials, cement, paint, structural reinforcing steel bar)
Combination of materials (bituminous & Portland cement concrete)

Laboratory Equipment

Graduated Beaker

A cylindrical container with a flat bottom, used in laboratory equipment.

Slump Cone

A metal mold in the form of a truncated cone, used for concrete slump testing.
Measures the workability of fresh concrete.

Workability of Concrete

Affected by consistency (wetter mixes are more workable than drier mixes).
Concrete of the same consistency may vary in workability.

Molds in Material Testing Lab

Three types of molds used for preparing concrete specimens:
- Cube Molds (150mmx150mmx150mm, 100mmx100mmx100mm, 70.6mmx70.6mmx70.6mm)
- Cylinder Molds (6x12 in., 4x8 in.)
- Beam Molds (100x100x400 mm, 100x100x500 mm, 150x150x600mm)

Keys in Quality Control

Owner: responsible for work to be done
Implementer: responsible for work to be constructed
Quality: ensures works are at performance level

Universal Testing Machine

Used to test mechanical properties (tension, compression, etc.) of a test specimen.
Exerts tensile, compressive, or transverse stresses.

Test your knowledge about concrete mixers, devices commonly used to combine cement, aggregate, and water to form concrete. Learn about the different types of mixers and their components such as the revolving drum.