What are the basic requirements for an asphalt pavement?

What are the basic requirements for an asphalt pavement?

The Complete 7-Step Process for Asphalt Pavement Installation

• Step 1: Demolition and Removal.
• Step 2: Grading and Sloping.
• Step 3: Prepare the Sub Base.
• Step 5: Binder and Surface Course.
• Step 6: Install New Asphalt Surface.
• Step 7: Butt Joints and Transitions.
• To Complete the Project: Final Roll.

What spec section is asphalt?

A. Asphalt concrete shall conform to Section 39, “Asphalt Concrete”, of the Caltrans Standard Specifications except as modified herein. 1. The liquid asphalt for prime coat shall conform to Section 92 “Asphalt Binders” of the Caltrans Standard Specifications and shall be Performance Graded PG 64- 10.

What are the grades of asphalt?

There are three different grades available in asphalt. The grades available are I-2, also known as base; I-5, known as top ;and the I-4 or commercial top grades. The difference in the tree grades are that the I-2 or base consists of ¾ inches of stone. The base grade is generally used in corn stabilizing level.

What is the maximum thickness of asphalt?

When pneumatic or vibratory roller is used, the maximum lift thickness that can be compacted is almost unlimited. Generally, lift thicknesses are limited to 6 or 8 inches. Proper placement becomes a problem in lifts thicker than 6 or 8 inches.

What is the minimum degree of compaction of asphalt pavement?

Standards [1] that “the compaction coefficient (K) of hot asphalt layer shall not be less than 0.98”.

What is the compaction rate of asphalt?

Remember, the compaction rate, as a general rule, is about 6 mm (1/4″) per 25 mm (1″) of screed laid thickness when a vibratory screed is used and about 5 mm (1/5″) per 25 mm (1″) when a tamping and vibrating screed is used. Always verify the compaction rate of the fresh layer when building a longitudinal joint.

What is the density of asphalt?

Standard density for asphalt is 145 lb/ft3 (2322 kg/m3). Multiply the volume by the density (in the same units) to get the weight.

What is the best thickness for an asphalt driveway?

A 4-inch thickness may be adequate, but 5 or even 6 inches of full-depth asphalt will assure you of a stronger, stable driveway under a wider range of climate and loads. As an option, some contractors use 6 to 8 inches of compacted aggregate, or gravel, as a base under 3 inches of asphalt pavement.

How can you tell the quality of asphalt?

The following tests are usually conducted to evaluate different properties of bituminous materials.

1. Penetration test.
2. Ductility test.
3. Softening point test.
4. Specific gravity test.
5. Viscosity test.
6. Flash and Fire point test.
7. Float test.
8. Water content test.