APP REVIEWER 1 Flashcards
Sample for compressive strength determination of structural concrete
Concrete Cylinder Sample
Test to determine consistency of concrete
Slump Test
Length required for RSB sample for quality test
1.0m per 10,000kg / size / shipment
How many samples should be taken for every 75 cu.m of fresh concrete?
1 set of 3 pcs samples
Required test size of test specimens of GI sheets
3 pcs - 60 mm in 1 sheet / 100 sheets
Kind of paint that has a reflectance or beads
Reflectorized Paint
How many hours shall a bituminous prime coat be left undisturbed?
24 hours
What is the rate of application of bituminous tack coat?
0.2 to 0.7 L/sq.m
What is the penetration grade of blown asphalt?
0 to 30 penetration grade
What kind of concrete sample is taken for flexural test?
Concrete Beam Sample
What are the tests needed for the 2.65 cu.m Item 201 (Aggregate Base Course)?
CBR, Abrasion, GPCD
How many grading tests are required for a 3,200 cu.m selected borrow topping (Item 104)?
3 Grading Tests
What will you recommend if you find out that the materials to be used as Item 200 is finer than the required materials?
Blend Item 200 with coarser materials
Standard specifications for LL and PI of Item 201
Maximum of 25%
Maximum of 6%
CBR requirement for Item 201
80% Maximum
Construction material that has a property of being a dark brown to black cementitious material in which the predominating substance is bitumen?
Asphalt
What asphalt is used for sealing weakened plane joints of concrete pavement?
Brown Asphalt
Item 311 of the DPWH Specifications (Blue Book)
Portland Cement Concrete Pavement
Machine used for Abrasion Test
Los Angeles Abrasion Machine
How to determine the degree of compaction of items 104, 200, & 201?
Field Density Test
Formula of obtaining PI
PI = LL - PL
Other terms for sieve analysis
Grading Test
Particle Size Distribution Test
Mechanical Analysis
Degree of compaction of the soil if the wet density is 2,200 kg/cu.m with an actual moisture content of 10.2% and a maximum dry density of 1,960 kg/cu.m
101.23%
How many concrete cores shall be taken for 1 kilometer concrete pavement?
5 holes / km / lane
If the group index of a soil is high, what does it indicate?
The soil is clayey
For how many bags of cement does a 10 kg sample represent?
2000 bags
For 15,000 kg RSB, how many samples shall be submitted for Quality Test?
2 pcs - 1 m
In oven drying a sample for test, what temerature shall be maintained?
105 - 115 degrees Celsius
Why is it that cooling an oven dried sample before weighing is advisable?
Because i can affect its weight
What is the use of blown asphalt?
Joint filler and Water Proofing
Difference between hygroscopic moisture content from natural moistue content?
Hygroscopic moisture content is the moisture content of an air-dried sample, while natural moisture content is the moisture conctent of the oven-dried sample
How can you determine that the sample placed in the oven is already oven dried?
If the sample reaches its constant weight
An admixture is being introduced to the fresh concrete mixture for heavily reinforced concrete structure using a pumpcrete to pump out the fresh concrete mix, what admixture should it be?
Superplasticizer
Moisture content of the soil having an original weight of 162.5 grams and an oven-dried weight of 138.2 grams
17.58%
Commonly nown as hot asphalt or penetration grade asphalt
Asphalt Cement
How many days shall the sample for Immersion Compression Test be soaked in water?
4 days @ 50 degrees Celsius
If ductility test is for asphalt, what test is for cement?
Magnesium Oxide
Insoluble Residue
Loss on Ignition
Paint is composed of:
35% vehicle, 50% pigment, and 15% beads
Size of tamping rod used in tamping concrete samples
16 mm and 610 mm long with hemispherical tip
Temperature to be maintained when curing samples after its initial curing
21.3 to 24.7 degrees Celsius
Concrete cyinders are cured and ready for test. Temperature between 63 deg Farenheit to 85 deg Farenheit are permitted for a period not to exceed ___ hours immediately prior to test if free moisutre is maintained on the surface of the specimen at all times
3
The molds of specimen not to be transported shall be removed after initial curing of ___ hours and should be cured to the standard curing temperature of 70.4 - 76.4 deg Farenheit
24
High plasticity index means ___ of a soil
High degree of compressibility
Sample to be issued for liquid limit and plastic limit tests should pass to what sieve?
No. 40 (0.425 mm)
What compaction rammer shall be used if the specs given for Moisture Density Relation Test (MDR) is T 180?
4.54 kg with 457 mm drop
A beam mold measuring 6 x 6 x 20 is to be used for sampling concrete. How many blows or tamps per layer shall be applied?
60 blows per layer
If asphalt mix having a weight of 3,020 g and an aggregate weighing 2,865.98 g, what is the % asphalt by weight of mix?
5.1%
Material used for Bituminous Prime Coat
Cut-Back Asphalt
In Item 303, application of cover aggregates shall be evenly spread over the surface at the rate of approximately ___
0.004 to 0.007 cu.m / sq.m
Asphalt mix having a weight of 3,020g and an aggregate weighing 2,865.98g. Applying the tolerance of 0.4% for asphalt content, what is the acceptable range of asphalt content?
4.7% - 5.5%
