MATERIAL ENGINEER – QUIZ 3

_______ is a laboratory which measures, examines, calibrate or

otherwise determine the characteristics or performance materials or

products.

Testing laboratory

Standard technical procedure to determine one or more specified

characteristics of material product is called ________.

Test Method

A document which prevents the test result and other information

relevant to test is called ________.

Test Report

Is a document signed by the Director of BRS issued to Testing

Laboratory authorizing them to perform the required test in behalf of

DPWH.

Certificate of Accreditation

the test have been developed to measure the loss of cohesion as a

result of water action on the compacted bituminous mixture.

Film Stripping & Immersion Compression Test

______ means porosity of perviousness of the mixture, a dense grade

mix prevent water from entering the base through the surface.

Permeability

_____ is used in classifying liquid asphalt into grades. It is

useful as a measure to control of consistency, particularly when run

at the temperature of intended application.

Viscosity Test

______ determines the total bitumen content of a asphaltic

materials, which is the actual cementing constituent of the asphalt.

Solubility Test

_______ is an accelerated test to show the loss of volatiles when

the sample is heated at 163°C for the five hours and the loss due to

volatilization is determined.

Loss on Heating

________ is the test that classifies the different asphalt and

differ into grade.

Penetration Test of Asphalt

For liquid asphaltic materials, this test is run on the residue

after distillation.

Quality Test

This is one of the most important engineering properties. It is

defined as its ability to resist sliding along internal surface within

the mass.

Shearing Strength of soil

This is an arbitrary measurement of consistency and is the basis

of classification of all solid and semi-solid asphalt.

Penetration Test of Asphalt

Plant-mixed bituminous mixtures should be sampled in accordance to

the Standard method of sampling bituminous mixture. A sample not less

than ____ is taken and place in sample bag that would insure against

contamination. This is taken every 75 m3 or 130 tons of mix.

20 kg

The bearing blocks of the compression machine should be at least

_____ greater than the diameter of the specimen.

3.0%

The bottom bearing block shall be at least _____ thick when new

bottom bearing block shall be at least _____ thick after any

resurfacing operations.

1.0”, 0.9”

The curing temperature of a specimen before testing is _______.

16-24°C

The apparatus used to determine the flash point of asphaltic

material is called ______.

Cleveland Open Club

The asphalt samples for ductility and penetration test should be

subjected to water bath at a temperature of 25°C for _______.

1 ½ hours

The concrete shall not be left exposed for more than ______.

½ hours

The rate of application of bituminous prime coat is _______.

1-2 L/m2

In asphalting work, there are ___ phase of rolling.

3

The ____ test determines the asphalt content in the bituminous

mix.

Extraction

In a bituminous mix, there are 3 kinds of aggregate. What kind of

passes the no. 200 sieve?

Mineral Filler

Liquid asphalt is also called ____.

Cutback Asphalt

The apparatus/equipment used in the liquid limit and plastic limit

test is called ______.

Attenberg Dev.

_____ is a method of sampling.

Using mechanical splitter/quartering

In laboratory compaction test/ moisture density relation test,

what is the specification of rammer?

5.5lb (2.5kg) in weight with 12 in. drop

What is the specification of mass percent passing in sieve

0.075mm. No 200 sieve grading “A” for aggregate base course.

0-12

The number of specimen in testing concrete hollow blocks is ____.

6 pcs./10,000 units (3 for absorption test & 3 for strength

test.

Is it really necessary to cure concrete specimen?

Yes

The kind of test that determines the consistency of concrete is

____.

Slump Test

What is the dimension of concrete cylindrical sample?

6” dia. and 12” high

In the absence of concrete beam mold at the project site, are

concrete cylindrical molds allowed by the specification to be used in

sampler for Item 311 – PCCP?

No

The minimum percent compaction for embankment is ______.

95.0%

The minimum percent compaction for base of the road is ______.

100.0%

The CBR value of aggregate base course is not less than _____.

80.0%

The CBR value of aggregate subbase course is not less than ____.

30.0%

The minimum compressive strength for Class A concrete is ______.

3,000 psi (20.7 MPa)

What is the significance of determination of the tensile

properties of reinforcing steel bars?

This method is intended to determine yield and tensile

strength of the bar as well as its elongation and is

used to classify the bars into grade.

A tie bar should be _____.

Deformed bar

A dowel bar should be ______.

Round bar

The mortar for masonry shall consist _____.

One part of Portland Cement and 2 parts of sand.

The apparatus used to measure the thickness or height of compacted

bituminous paving mixture.

Vernier Califer

It is used in calculating the unit weight of the mixture and the

degree of compaction of the asphalt pavement.

Bulk specific gravity of compacted bituminous mixtures

using saturated surface dry specimen.

The test which covers the quantitative determination of bitumen in

hot mixed paving mixtures and pavement samples for specification

service evaluation, control and research.

Extraction

The solvent used in extraction of bitumen is ________.

Gasoline

The percent of bitumen content is computed based on _______.

Mass of dry aggregates

The method used to determine the grading of aggregate extracted

from bituminous mixture is _________.

Mechanical analysis of extracted aggregates

The drying temperature of sample is _________.

110 + 5°C

______ is a solid asphalt which is a basic constituent of all

other asphalt called as hot asphalt or penetration grade asphalt.

Asphalt Cement

_______ is a kind of liquid asphalt which is a mixture of asphalt

cement and kerosene.

Medium Curing Cutback

______ is a kind of liquid asphalt which is a mixture of asphalt

cement and gasoline.

Rapid Curing Cutback

Asphalt is defined as _________.

A dark brown to black cementitious materials whose

consistency ranges from solid to semi-solid and whose main

constituent is called bitumen is either found in nature or

as a residue in petroleum refining.

it is a kind of liquid asphalt which is a mixture of asphalt cement

and water with emulsified with pungent odor.

Emulsified Asphalt

Joint Filler in concrete pavement is a _______.

Blown Asphalt

A device used to measure the relative hardness of asphalt is

_____.

Penetrometer

A property of asphalt cement to stretch without breaking is called

______.

Ductility

An apparatus used to determine the specific gravity of asphalt is

called ________.

Metal Pycnometer

Consistency test for asphalt is called _________.

Viscosity

A process of volatilization test which measures the relative

proportion of asphalt to oil.

Distillation

____ is a period wherein the asphalt begins to melt.

Softening Point

The sampling requirement of asphalt is ________.

1 sample for every 200 drums or 40 metric tons

The component of bituminous mixes which range from 92 to 96% is

called _________.

Bituminous Blended Aggregates

_____ is a property of bituminous mixes in pavement to resist

deformation or displacement due to impose load or repeated loading.

Stability

_____ is a property of bituminous mixes in pavement to resist

disintegration or deterioration due to the action of water, traffic

and changing climate.

Durability

_______ is a property of bituminous mixes in pavement adjust

itself to settlement.

Flexibility

These are the factor affecting the workability of bituminous

mixes?

Gradation of aggregates quality of asphalt and temperature

of mix.

The percent retention is computed in the formula ________.

Wet Stability/Dry Stability x 100.

The sampling requirement of bituminous mixes is _________.

1 sample for every 75 m3.

The application of liquid asphaltic material on a prepared

untreated base is ________.

Prime Coating

The application of liquid asphaltic material to an existing

concrete surface is ________.

Tack Coating

The application of asphaltic material and aggregate to an existing

surface for the purpose of sealing it against the infiltration of

water surface moisture is called _______.

Seal Coating

The rate of application of prime coating using cutback asphalt is

________.

1-2 liters/m2

The rate of application of tack coating using liquid or emulsified

asphalt is _______.

0.2-0.7 liter/m2

The rate of application of seal coat using asphalt cement is

_____.

0.9-1.8 liters/m2

When consolidating during pouring operations, vibrator should not

be operated in any one location longer than:

15 seconds

The primary quality control mechanism for the production of

asphalt mixes with high degree of uniformity that will satisfy job

requirement is ________.

Job mix formula

The percent asphalt content in hot laid bituminous mixture range

from _______.

5.0-8.0%

The placing of temperature for bituminous mixture measured in the

truck prior to dumping is ______.

at least 107°C

The second phase of rolling the spread bituminous mixture is

called breakdown rolling which is the one responsible to attain the

maximum density. The rolling is carried out by the use of ______.

pneumatic roller

The significance of the final rolling is to remove the roller

marks to previous rolling in order to have a good finish pavement with

a temperature of 160°C.

True

The proper way of rolling should begin at ________.

The sides and proceeds longitudinally towards the road

center each overlapping on half the roller width, gradually

progressing the crown of road.

What is the minimum degree of compaction of asphalt pavement?

not less than 100% of the density of the laboratory

compacted specimen.

What is the color of asphalt when it is overcook?

gray

______ determines the thickness and density of compacted pavement.

Core Test

The cored sample of asphalt pavement is measured at ______.

approximately quarter points

Too much content in the bituminous mixes causes ________.

bleeding

The wearing away of the pavement surfaced caused by the dislodging

of aggregate particle is called _______.

raveling

Interconnected cracks forming a series of small blocks resembling

alligator’s skin or chicken wire is called ______.

alligator cracking

In Item 200 – Aggregate Subbase Course, the fraction passing the

0.425m (No.40) sieve should have a liquid limit not greater than:

35%

If the fine aggregates are subjected to five cycles of sodium

sulfate soundness test, the weighted loss shall not exceed ____.

10 mass percent

Specimen of course aggregates are subjected to five cycles of

sodium sulfate soundness test, the weighted loss shall not exceed

____.

12 mass percent

The mass percent of wear of course aggregates for Item 311 when

tested by AASHTO 96 is not greater than ______.

40%

The design of concrete mix specified by the blue book is based on

_________.

Absolute Volume Method

he minimum flexural strength requirement of beam sample when

tested by the third point of loading method is _________.

3.8 Mpa

The minimum flexural strength requirement of beam sample when

tested by midpoint method is _______.

4.5 Mpa

_______ are additives used in mixing concrete.

Admixture

The standard used in testing the mortar strength of Portland

Cement is called ________.

Ottawa Sand

The apparatus used in determining the fineness of Portland Cement

air permeability is ______.

Blaine Air Permeability Apparatus