What is super plasticizers?

Super plasticizers reduce water requirement by ___________ %.

A

12-30

B

10-15

C

30-42

D

48

What is the allowed reduction of water with super plasticizers without reducing workability?

A

10%

B

20%

C

30%

D

40%

What are Plasticizers?

A

Which reduces water for workability

B

Which oxidizes water for workability

C

Which decreases workability at the same water content

D

Which adds water for workability

Which of the following is useful for determination of volatilities of plasticizers and other additives?

A

Thermo gravimetric analysis

B

Differential scanning calorimetry

C

Scanning electron microscopy

D

Atomic force microscopy

Plasticizers are used to get the ___________ between the polymeric molecules.

A

Attraction

B

Freedom of movement

C

Pi-bond

D

Sigma bond

Plasticizers ___________ the strength of the plastics.

A

Increase

B

Decrease

C

Do not affect

D

May increase above the room temperature

What is the amount used of plasticizers in cement by weight?

A

0

B

.1-.4%

C

1%

D

1-2%

What is the limitation of plasticizers?

A

A good plasticizer is one which does not cause air-entrainment in concrete > .1-.2%

B

A good plasticizer is one which does not cause air-entrainment in concrete > 5%

C

A good plasticizer is one which does not cause air-entrainment in concrete > 10-20%

D

A good plasticizer is one which does not cause air-entrainment in concrete > 1-2%

Where do we use plasticizers?

A

Where low degree of workability is required

B

Where medium degree of workability is required

C

Where high degree of workability is required

D

Where very low degree of workability is required

Plasticizers in polymers ___ toughness and ____ stiffness.

A

increase, increase

B

increase, decrease

C

decrease, increase

D

decrease, decrease

What is super plasticizers?

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