# Concrete Technology Questions and Answers – Ultra High Strength Concrete

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Ultra High Strength Concrete”.

1. Ultra-High Performance Concrete (UHPC), also known as ______
a) Active powder concrete
b) NPC
c) Reactive powder concrete
d) High Strength concrete

Explanation: Ultra-High Performance Concrete (UHPC), also known as reactive powder concrete (RPC), is a high-strength, ductile material.

2. The material used for UHPC provides compressive strengths up to __________
a) 17000 psi
b) 20000 psi
c) 25000 psi
d) 29000 psi

Explanation: The material provides compressive strengths of up to 29000 pounds per square inch.

3. The material used for UHPC provides flexural strengths up to _________
a) 2000 psi
b) 5000 psi
c) 7000 psi
d) 10000 psi

Explanation: The material used for UHPC provides flexural strengths up to 7000 pounds per square inch.

4. Range of modulus of elasticity for UHPC ___________
a) 30-35 GPa
b) 35-40 GPa
c) 40-45 GPa
d) 45-50 GPa

Explanation: 45-50 GPa or 6500 to 7300 ksi is the range of modulus of elasticity for ultra-high performance concrete.

5. What is the compressive strength for UHPC?
a) 10-20 MPa
b) 60-100 MPa
c) 100-150 MPa
d) >150 MPa

Explanation: 28 days compressive strength for UHPC is 100-150MPa and for HPC, it’s 60-100 MPa.

6. What is the percentage of water by weight in UHPC?
a) 28.5
b) 4.4
c) 1.2
d) 6.2

Explanation: 4.4 is the percentage of water by weight in UHPC according to the typical composition of Ductal.

7. What is the percentage of PC by weight in UHPC?
a) 28.5
b) 4.4
c) 1.2
d) 6.2

Explanation: 28.5 is the percentage of PC by weight in UHPC according to the typical composition of Ductal.

8. What is the percentage of steel fibre by weight in UHPC?
a) 28.5
b) 4.4
c) 1.2
d) 6.2

Explanation: 6.5 is the percentage of steel fibre by weight in UHPC according to the typical composition of Ductal.

9. What is the percentage of the accelerator by weight in UHPC?
a) 28.5
b) 4.4
c) 1.2
d) 6.2

Explanation: 1.2 is the percentage of the accelerator by weight in UHPC according to typical composition of Ductal.

Sanfoundry Global Education & Learning Series – Concrete Technology.

To practice all areas of Concrete Technology, here is complete set of 1000+ Multiple Choice Questions and Answers.

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