Assistant Material Engineer Interview Questions and Answers

The physical properties of soil, GSB, and WMM materials can be tested through various methods.

• Particle size distribution test

• Moisture content test

• Specific gravity test

• Compaction test

• California Bearing Ratio (CBR) test

• Permeability test

• Shear strength test

The testing procedure for determining the physical properties of fresh and hardened concrete involves various tests.

• For fresh concrete, tests like slump test, air content test, and temperature test are conducted.

• For hardened concrete, tests like compressive strength test, flexural strength test, and water absorption test are conducted.

• Other tests may include density test, porosity test, and shrinkage test.

• These tests help in evaluating the workability, strength, durability, a...read more

The compressive strength of cement mortar cube at 3 days is typically around 20-25 MPa.

• Compressive strength of cement mortar cube is an important parameter to assess its quality and durability

• The strength of cement mortar increases with age, so 3 days is an early testing point

• Typical compressive strength values for cement mortar cubes at 3 days range from 20-25 MPa

There are mainly four grades of bitumen commonly used in construction: VG-10, VG-20, VG-30, and VG-40.

• VG-10: Suitable for low-traffic roads

• VG-20: Suitable for medium-traffic roads

• VG-30: Suitable for high-traffic roads

• VG-40: Suitable for heavy-duty traffic areas like airports and container terminals