What is PCC asphalt?

INTRODUCTION. Portland cement concrete (PCC) pavements (or rigid pavements) consist of a PCC slab that is usually supported by a granular or stabilized base, and a subbase. In some cases the PCC slab may be overlaid with a layer of asphalt concrete

asphalt concrete

Asphalt most often refers to: Bitumen, also known as "liquid asphalt cement" or simply "asphalt", a viscous form of petroleum mainly used as a binder in asphalt concrete. Asphalt concrete, a mixture of bitumen with coarse and fine aggregates, used as a road surface.

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Asphalt - Wikipedia

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What is the difference between AC and PCC pavement?

One of the biggest differences between AC and PCC is NOT just the design approach that is commonly understood (flexible vs. rigid pavement), but their corrosion failure mode. The nemesis of PCC is water and salt getting to its steel reinforcement. The nemesis of AC is sunlight.

What is the main difference between PCC and RCC?

PCC stands for Plain Cement Concrete while RCC stands for Reinforced Cement Concrete. The main difference between PCC and RCC is the inclusion of steel bars in RCC, which adds strength and durability to the concrete. PCC is made of cement, water, sand, and aggregate, but does not have the added strength of steel bars.

What is the thickness of a PCC pavement?

The pavement thicknesses were arbitrarily selected to range from 4.5 to 6 in (11.4-15.2 cm) and were not based on the plate-bearing results or the PCA design formula.

What are the two types of asphalt concrete?

There are two mainly types of asphalt concrete: hot-mixed, hot-laid mixtures, which are mixed, placed, and compacted at various high temperatures determined by the viscosity–temperature relationship of the binder; and cold-mixed, cold-laid mixtures, which are mixed, placed, and compacted at, or slightly higher than the ...

Concrete Pavement Construction - Part 1

What are the 3 types of asphalt?

There are three main types of asphalt: Hot Asphalt, MC Cold Mix, and UPM. There are also different varieties of these asphalts for summer and winter use. Below is a brief overview of each type of asphalt.

What is the best grade of asphalt?

The 60-70 grade is usually used only in pavements where traffic is very heavy such as principle city streets and very heavily trafficked rural highways. The second grade, 85-100, is by far the most widely used material for plant mixes and is suitable for most pavements.

What is the strength of PCC concrete?

Most pavement PCC has a compressive strength between 20.68 and 34.47 MPa (3000 and 5000 psi) (ACPA, 2001). High-strength PCC (usually defined as PCC with a compressive strength of at least 41.37 MPa (6000 psi)) has been designed for compressive strengths of over 137.90 MPa (20,000 psi) for use in building applications.

What is the thickness tolerance of PCCP?

The tolerance limit is currently 5 mm (0.2 in.) for full payment.

What is the maximum thickness of asphalt layer?

When static steel-wheeled rollers are used, the maximum lift thickness that can be properly compacted is 3 inches. When pneumatic or vibratory rollers are used, the maximum thickness of lift that can be compacted is almost unlimited. Generally, lift thicknesses are limited to 6 or 8 inches.

What is another name for PCC concrete?

PCC stands for Plain Cement Concrete. PCC is a combination of cement, sand-like fine aggregate, and coarse aggregate. Another name for it is blinding concrete or cement concrete (CC).

Why do we use PCC concrete?

The objective of plain cement concrete alias PCC is to arrange a firm impermeable bed to RCC in the foundation where the soil is soft and flexible. It is mostly applied over brick flat soling or devoid of brick flat soling. It is also known as Cement Concrete (CC) or Blinding Concrete.

What are the 7 grades of concrete?

Concrete grades include; C7/8 Concrete, C10 Concrete, C15 Concrete, C20 Concrete, C25 Concrete, C30 Concrete, C35 Concrete and C40 Concrete.

Is PCC pavement rigid?

Portland cement concrete (PCC) pavements (or rigid pavements) consist of a PCC slab that is usually supported by a granular or stabilized base, and a subbase. In some cases the PCC slab may be overlaid with a layer of asphalt concrete.

Is PCC load bearing?

PCC is a mixture of cement, fine aggregate or coarse aggregate, and water without steel reinforcement. It is generally used for flooring, roads, and retaining walls but not for columns, slabs, and beams, etc because it can't carry load or tensile force.

Which concrete grade is best for PCC?

The Grade of the PCC used is M15 grade. IN M15 Grade, The mix ratio is 1:2:4. (1 cement,2 sand , 4 aggregates). Applications: M15 grade plain concrete cement is used for levelling courses,bedding for footing, beams and columns e.tc.

What is subbase for PCCP?

One is “Subbase for PCCP” and consists of two aggregate layers. The top layer consists of coarse aggregate No. 8 and serves as the drainage layer for the subbase.

What strength is required for PCCP?

PCCP may be opened to construction vehicles, equipment, and traffic when the flexural strength of the test beams indicates a modulus of rupture of 550 psi or greater. ITM 402 may be used as an alternate method to determine the flexural strength.

What is the maximum joint spacing concrete pavement?

Typically, for jointed plain concrete streets, the joint spacing should be 24 to 30 times the pavement thickness with a maximum spacing of 15 ft (4.5 m). It is also important to keep slabs as square as possible. Transverse joint spacing should not exceed 125% to 150% of the longitudinal joint spacing.

What PSI is asphalt?

160-200 psi is industry range (160 psi most common).

What are the uses of PCC?

Prothrombin complex concentrate (PCC), also known as factor IX complex, is a medication made up of blood clotting factors II, IX, and X. Some versions also contain factor VII. It is used to treat and prevent bleeding in hemophilia B if pure factor IX is not available.

What PSI should concrete roads be?

Traditional concrete walls and columns tend to range from 3,000 to 5,000 psi, while 4,000 to 5,000 psi is needed for pavement. Concrete structures in colder climates require a higher psi in order to withstand more freeze/thaw cycles.

What is the longest lasting asphalt?

Of the 3 types of asphalt shingles, the longest lasting are luxury (or premium) asphalt shingles. Luxury asphalt shingles are larger and thicker than 3-tab or architectural shingles, which makes them more durable.

Which asphalt is the best for a driveway?

Hot mix asphalt is considered best for driveways, because construction and design features are suitable to giving it a finished appearance that complements the home.

What is the difference between blacktop and asphalt?

Blacktop is heated to approximately 150 degrees celsius, whereas asphalt is only heated to 120 degrees celsius. Asphalt is has a higher bitumen content and for that reason is less porous and more resilient to wear and tear from high traffic and thus is the preferred choice for major highways.