Lesson 2 - Concrete

Question 1

design to remove a cylinder of
material, much like a hole saw.

Answer 1

Core drill

Question 2

to thrust out; force or press out.

Answer 2

Extruder

Question 3

used to determine the strength and
slope stability of rock size

Answer 3

Portable rock shear box assembly

Question 4

used to test the effects of specified
environmental conditions.

Answer 4

Climatic chamber

Question 5

use for splitting breaking rock.

Answer 5

Geologic hammer

Question 6

used to perform compression test on concrete beam specimens.

Answer 6

Compression testing machine

Question 7

used to perform flexural tests on
concrete beam specimen

Answer 7

Flexural testing machine

Question 8

used to determine the strain and
deformation – characteristics of
concrete specimens.

Answer 8

Compressometer

Question 9

suitable for field mixes of medium
strength concrete

Answer 9

Drum type mixer

Question 10

for the determination of the
consistency, the medium and high
workability of fresh concrete.

Answer 10

Slump cone

Question 11

method is based on the same principle of the simple slump cone test method, for the determination of the workability of concrete, but it has the advantage of a mechanized action after removing the slump cone, the concrete undergoes a vibration to determine its slump. A space disk set in contact with the upper surface of the wet concrete,
gives the operator the opportunity to determine when the compaction is
complete. The operator will count the time necessary to complete the
requested vibration, so as to get an
indication of the workability of the
concrete.

Answer 11

Vebe Consistometer

Question 12

designed to undertake a more
precise and sensitive test procedure
than the simple slump test

Answer 12

Compacting factor apparatus

Question 13

to determine the degree of
compaction and the workability of
fresh concrete. Used for in-site
measurements of inside test molds.
Test results can be correlated against the slump values.

Answer 13

K-Slump tester

Question 14

used to determine the workability of
concrete.

Answer 14

Flow table

Question 15

it is used to determine the workability of fresh concrete. The ball is lowered into the concrete and the
penetration measured. It can be
used on site or in laboratory

Answer 15

Kelly ball apparatus

Question 16

(also known as plastometer) is designed to
test concrete for dynamic workability.

Answer 16

Concrete workability meter

Question 17

used for quick and easy
measurement of the plasticity of
mixtures especially concrete, and so
to detect rapidly any excess of water. The measuring system is related to the shear strength applied by a three blade heads to the mixture under
test.

Answer 17

Plasticity meter

Question 18

used to determine the setting time of the mortar fraction in concrete mixes with the slump greater than zero, by
testing mortar sieved from mix.

Answer 18

Concrete penetrometer

Question 19

it records directly the percentage of
air enclosed in freshly mixed concrete by operating according to the air pressure principle.

Answer 19

Air entertainment meter

Question 20

used to determine the weight per
cubic meter of freshly mixed and
compacted concrete.

Answer 20

Unit weight measure

Question 21

used to separate the various
elements of the fresh concrete such
as cement, sand, aggregates.

Answer 21

Joisel apparatus

Question 22

used for the determination of cement content in fresh concrete , coarse
and fine aggregate, fly ash and
GGBF slag content can also be
determined.

Answer 22

RAM - Rapid analysis machine

Question 23

used in molding

Answer 23

Concrete moulds

Question 24

used for the compaction of concrete
specimens in the laboratory.

Answer 24

Vibrating tables

Question 25

designed to grind and polish cubic
and cylindrical specimens of
concrete, rocks, and natural stones.

Answer 25

Specimen grinding machine

Question 26

used for curing concrete specimens.

Answer 26

Curing tanks

Question 27

used to cut concrete specimens and
any type of construction materials like blocks, tiles, pipes, rocks cores etc.

Answer 27

Specimen cutting machine

Question 28

to measure materials characteristics
by using ultrasonic pulses

Answer 28

Ultrasonic pulse velocity tester

Question 29

designed to carry out water
permeability test on cubic concrete
specimens max.

Answer 29

Automatic concrete water permeability apparatus

Question 30

a device using a hydraulic cylinder
to generate a compressive force.

Answer 30

Hydraulic press

Question 31

like water permeability test, this is also
one of the test to determine the durability of concrete

Answer 31

Rapid chlorine ion penetration meter