Local Road Construction Flashcards
Video 1: Earthworks
Paano gumawa ng kalsada?
ClearExES
Video 1: Earthworks
It means removing unwanted/organic materials on the road.
Clearing and Grubbing
Video 1: Earthworks
Ang paghuhukay sa lupa
Excavation
Video 1: Earthworks
Ang pagtatambak ng lupa
Embankment
Video 1: Earthworks
It is defined as soil surface
Subgrade
Video 1: Earthworks
2 Analysis of Soil
- Sieves Analysis
2 Field Density Test
Video 2: Subbase
Mixture of sand, gravel, water etc. that go under the California Bearing Ration Test (CBR)
Subbase Course
Video 2: Subbase
Subbase depends on the thickness and layering of subgrade.
150 mm subgrade = ____ layer of subgrade
more than 150 mm subgrade = ____________ layer of subgrade
150, 2 or more
Video 3: Portland Cement Concrete Pavement
Cement vs. Concrete
__________ ay sangkap ng concrete
___________ enough mixture of cement, gravel, sand, etc.
Cement, Concrete
Video 3: Portland Cement Concrete Pavement
Before buhos, concrete undergo ______ test
Then dadalhin ito sa site within ________ minutes period.
They also use __________________ para maayos ang buhangin at walang hangin.
Every _______, dapat 3 beams samples will undergo flexural test.
Beam depth size?
slump
45-90
concrete vibrator
75m^3
150x150x525x230mm
Video 3: Portland Cement Concrete Pavement
8 Steps of buhos?
- Pouring of concrete
- Floating
- Broom finish
- Curing compound
- Cutting/Contraction joints on every 4.5m
- Asphalt Sealant
- Forms removal
- Flexural test for 14 days
Video 4: Shoulder
It is the emergency stopping lane that also serves as daanan ng water going to drainage.
Shoulder
Video 5: Drainage
This prevents flooding and strengthens the road.
Drainage system
Video 5: Drainage
2 Types of drainage system
- Lined canal
- Cross drainage
Video 5: Drainage
5 Different designs of lined canal
- Grouted riprap
- Stone masonry
- Reinforced concrete pipe culvert
- Reinforce concrete
- Concrete hollow blocks
Video 5: Drainage
2 designs of cross drainage
- Reinforced concrete box culvert
- Reinforce concrete pipe culvert
Video 5: Drainage
daanan ng mga to sa paglilinis ng drainage
Manhole
Video 6: Slope protection
It reduces erosion.
Slope protection
Video 6: Slope protection
7 designs of slope protection.
- grouted riprap
- Gabion & Mattresses
- Sheet files
- Concrete slop protection
- Shatcrete
- Retaining wall
- other that uses technology and erosion control materials.
Video 6: Slope protection
To protect slopes,
___________ - paglalagay ng grass seeds na may fertilizer.
_____________ pagtatanim ng grass w/ roots sa surface.
Hydro seeding
Turning
Video 7: Road safety devices
Distance of Chevron signs depend on the speed limit and radius of a place.
less than 20 kph, less than 60 m radius = ___ m
30-50 kph, 60-120 m = ___ m
60-70 kph, 120-210 m = ___ m
80-90 kph, 210-300 m = ___ m
more than 90 kph, more than 300 m = ___ m
12, 24, 36, 48, 60
Video 8: Road pavement
It serves as guide and control to prevent accidents, informing motorists about the condition of the road.
Pavement markings
Video 8: Road pavement
In 1911, 1st rcord of pavement marking by _______________ along the Trenton’s river road na accidentally natapon yung milk kaya nagka-white markings.
Edward N. Hines
Video 8: Road pavement
Paint used in pavements
Reflectorizes thermoplastic paint
