CONCRETE

Question 1

is an artificial stone made out from the mixture of cement, sand, gravel and water. Known as solid mass or plain –

Answer 1

Concrete

Question 2

A ready means of determining the consistency of freshly mixed concrete

Answer 2

Slump test

Question 3

Based on water cement ratio

Answer 3

0.68 lb of water/lb of cement to developed 2500 psi in 28 days

Question 4

Less water produce

Answer 4

Stronger concrete

Question 5

More water produce

Answer 5

Lesser strength

Question 6

Accelerates or retards concrete setting

Answer 6

Admixture

Question 7

Sizes of measuring box for: 40 kg cement

Answer 7

300mm300mm300mm

Question 8

Sizes of measuring box for: 50 kg cement

Answer 8

320mm320mm330mm

Question 9

Concrete mixture: Class AA

Answer 9

1:1 ½: 3

Question 10

Concrete mixture: Class A

Answer 10

1:2:4

Question 11

Concrete mixture: Class B

Answer 11

1:2½:5

Question 12

Concrete mixture: Class C

Answer 12

1:3:6

Question 13

Mortar mixture: Class A

Answer 13

1:2

Question 14

Mortar mixture: Class B

Answer 14

1:3

Question 15

Mortar mixture: Class C

Answer 15

1:4

Question 16

Mortar mixture: Class D

Answer 16

1:5

Question 17

Made from materials, which must contain in the proper proportions of lime, silica, alumina and iron components

Answer 17

Portland cement

Question 18

Same as normal portland but differ in color. It is used primarily for architectural purposes such as curtain wall and facing panels,,,

Answer 18

White portland cement

Question 19

Has been specially designed to produce better mortar than that made with normal portland cement…

Answer 19

Masonry cement

Question 20

raw materials that are produced from natural sources and extracted from pits and quarries, including gravel, crushed stone, and sand.

Answer 20

Aggregates

Question 21

½ and smaller diameter stones

Answer 21

Fine aggregate

Question 22

Bigger than ¼ diameter stoned

Answer 22

Coarse aggregate

Question 23

Standard slump cone

Answer 23

12” high (0.30) and 8” (0.20) in diameter at the bottom and 4” (0.10) on top

Question 24

Common quality control test of concrete, based on 7 and 28 days curing period. A test determining the compressive strength of a concrete batch, using a hydraulic press to measure the maximum load a test cylinder can support…

Answer 24

Compression strength test

Question 25

Cement, sand and water

Answer 25

Mortar

Question 26

Cement and water mixture

Answer 26

Grout

Question 27

Cement, sand, gravel and water

Answer 27

Concrete

Question 28

Large roughly molded sun dried clay bricks of varying sizes

Answer 28

Adobe brick

Question 29

A brick whose face has been hacked to resemble roughly hacked stone

Answer 29

Ashlar brick

Question 30

A compression test of a cylinder cut from a hardened concrete structure usually by means of a core drill

Answer 30

Core test

Question 31

The separation of coarse aggregate from the mortar or of water from the other ingredients of freshly mixed concrete, resulting from excessive horizontal movement…

Answer 31

Segregation

Question 31

A device for supporting and holding steel reinforcement in proper position before and during the placing of concrete

Answer 31

Chair

Question 32

The separation of an excessively wet or over-vibrated concrete mix into horizontal layers w/ increasingly lighter material migrating toward the top

Answer 32

Stratification