Concrete Materials and Processes Quiz

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What is the primary purpose of curing concrete?

To prevent the concrete from drying out too rapidly (correct)

To increase the strength of the concrete

To reduce the cost of the concrete

To change the color of the concrete

Which of the following is NOT a common method of curing concrete?

Spraying the concrete with water

Removing the forms at the prescribed time

Covering the concrete with paper, sacking, or burlap

Adding chemical admixtures to the concrete mix (correct)

How long should the curing period be for massive footings?

Not specified in the text (correct)

3 days

7 days

1 day

Which of the following is NOT a quality of good concrete?

Low cost Signup and view all the answers

What is the purpose of the slump test in concrete production?

To assess the workability of the concrete Signup and view all the answers

Which of the following is NOT a material used in concrete?

Steel Signup and view all the answers

What is the purpose of using curing compounds in concrete?

To prevent the concrete from drying out too quickly Signup and view all the answers

Which of the following is NOT a type of processed concrete mentioned in the text?

High-performance concrete Signup and view all the answers

What is the maximum amount of color pigment that can be added to cement by weight?

10% Signup and view all the answers

Which of the following is NOT an admixture that can be mixed into mortar?

Abrasive materials Signup and view all the answers

What type of lumber should be used for form construction?

Partially seasoned lumber Signup and view all the answers

Which of the following is NOT a cementing material mentioned in the text?

Concrete Signup and view all the answers

What is the purpose of a slump test in concrete?

To test the workability of the concrete mix Signup and view all the answers

What is the primary purpose of using admixtures in concrete?

To make the concrete more workable Signup and view all the answers

Which of the following is NOT a surface application finish for concrete?

Accelerators Signup and view all the answers

What is the primary purpose of curing concrete?

To increase the strength of the concrete Signup and view all the answers

What is the maximum allowable free-fall distance for concrete in unexposed work?

5 feet Signup and view all the answers

What should be done before placing concrete in the forms?

Clean and inspect the forms, and secure the reinforcement Signup and view all the answers

What can happen if concrete is piled up in the forms?

The cement mortar may separate from the coarse aggregate Signup and view all the answers

What is the purpose of curing concrete?

To increase the strength of the concrete Signup and view all the answers

What is the maximum allowable free-fall distance for concrete in exposed work?

3 feet Signup and view all the answers

What is the purpose of forms in concrete construction?

To provide a mold for the concrete to take shape Signup and view all the answers

What is the purpose of a slump test in concrete construction?

To determine the workability of the concrete Signup and view all the answers

What is the purpose of admixtures in concrete?

To improve the workability of the concrete Signup and view all the answers

What is a disadvantage of Pumice as a lightweight aggregate?

Excessive breakdown when handled Signup and view all the answers

How can the water absorption of Pumice be mitigated?

Wetting the aggregate before mixing with cement Signup and view all the answers

What is a disadvantage of Perlite as a lightweight aggregate?

Small particle size Signup and view all the answers

In which applications is Perlite useful?

Fireproofing and plaster Signup and view all the answers

What does the extreme lightness of Perlite increase the tendency of?

Floating out of mortar Signup and view all the answers

How does the small particle size of Perlite affect its usage?

Requires more cement Signup and view all the answers

'Aggregates of volcanic origin Pumice' is well qualified as a lightweight aggregate. What weight range does Pumice typically have per cubic foot?

$25 - 60$ lbs. Signup and view all the answers

What is the main purpose of adding metallic aluminum powder to the concrete mixture in Aerocrete?

To generate gas and form air cells Signup and view all the answers

Which of the following is NOT a typical application of Aerocrete?

Reinforced concrete columns Signup and view all the answers

What is the process of Gunite concrete?

Depositing a mixture of sand and cement under high pneumatic pressure Signup and view all the answers

What is a common application of Gunite concrete?

Encasing structural steel Signup and view all the answers

Which of the following statements about Aerocrete is NOT true?

It is a high-strength concrete suitable for load-bearing columns Signup and view all the answers

What is the trade name of the machine used to manufacture Gunite concrete?

Cement Gun Signup and view all the answers

Which of the following materials is NOT mentioned as a cementing material in the given text?

Fly ash Signup and view all the answers

What is the purpose of adding water to the dry constituents in the Gunite process?

To facilitate the pneumatic deposition of the concrete mixture Signup and view all the answers

Concrete Materials and Processes Quiz

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Questions and Answers

What is the primary purpose of curing concrete?

Which of the following is NOT a common method of curing concrete?

How long should the curing period be for massive footings?

Which of the following is NOT a quality of good concrete?

What is the purpose of the slump test in concrete production?

Which of the following is NOT a material used in concrete?

What is the purpose of using curing compounds in concrete?

Which of the following is NOT a type of processed concrete mentioned in the text?

What is the maximum amount of color pigment that can be added to cement by weight?

Which of the following is NOT an admixture that can be mixed into mortar?

What type of lumber should be used for form construction?

Which of the following is NOT a cementing material mentioned in the text?

What is the purpose of a slump test in concrete?

What is the primary purpose of using admixtures in concrete?

Which of the following is NOT a surface application finish for concrete?

What is the primary purpose of curing concrete?

What is the maximum allowable free-fall distance for concrete in unexposed work?

What should be done before placing concrete in the forms?

What can happen if concrete is piled up in the forms?

What is the purpose of curing concrete?

What is the maximum allowable free-fall distance for concrete in exposed work?

What is the purpose of forms in concrete construction?

What is the purpose of a slump test in concrete construction?

What is the purpose of admixtures in concrete?

What is a disadvantage of Pumice as a lightweight aggregate?

How can the water absorption of Pumice be mitigated?

What is a disadvantage of Perlite as a lightweight aggregate?

In which applications is Perlite useful?

What does the extreme lightness of Perlite increase the tendency of?

How does the small particle size of Perlite affect its usage?

'Aggregates of volcanic origin Pumice' is well qualified as a lightweight aggregate. What weight range does Pumice typically have per cubic foot?

What is the main purpose of adding metallic aluminum powder to the concrete mixture in Aerocrete?

Which of the following is NOT a typical application of Aerocrete?

What is the process of Gunite concrete?

What is a common application of Gunite concrete?

Which of the following statements about Aerocrete is NOT true?

What is the trade name of the machine used to manufacture Gunite concrete?

Which of the following materials is NOT mentioned as a cementing material in the given text?

What is the purpose of adding water to the dry constituents in the Gunite process?

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