What is AC 30 asphalt?

Bitumen AC 30 is a Viscosity Grade Bitumen which the Viscosity of the standard bitumen (asphalt) is measured at 60 degrees C (140 Degrees F). The main common usage of this product is in road making in temperate regions.

What is AC grade in asphalt?

The AC grading is based on absolute viscosity at 60 °C in units of 100 poises. Six asphalt cement viscosity grades were established as AC-2.5 (softest), AC-5, AC-10, AC-20, AC- 30, AC-40 (hardest). AC-2.5 means asphalt cement with a target viscosity of 250 poises at 60˚C (250 has been abbreviated to 2.5).

What is the meaning of AC 20 asphalt?

Bitumen AC 20 is a Viscosity Grade Bitumen. Asphalt cement grade (AC) of bitumen is one of the main categories of viscosity grade bitumen. AC 20 is a designed bituminous asphalt which is mostly used in hot climates because the viscosity is high.

What is the specific gravity of AC 30 asphalt close to?

An AC-30 asphalt cement with a specific gravity (Gn) of 1.031 was used. The mixture contains a 9.5 mm nominal max particle size aggregate with a bulk specific gravity (Gs)of 2.696. The theoretical max specific gravity of the mix (Gmm) at asphalt content of 5% is 2.470.

What is the difference between asphalt concrete and bituminous concrete?

Asphalt generally has a thicker layer of 25-40 mm whereas bitumen has a layer with a thickness of 10-20 mm. This is one of the reasons why asphalt has a longer lifespan. You can expect to get 5-10 years from a road where bitumen has been used while you get a staggering 20 + years from an asphalt road!

Vital Asphalt Supply Panamá - Planta de Derretido de Asfalto AC-30

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 ...

What are the different types of asphalt concrete?

What percent air voids in asphalt?

Air Voids (Va)

The allowable percentage of air voids (in laboratory specimens) is between 2.0 percent and 4.0 percent for most surface course mixes or as required by the owner. The durability of an asphalt pavement is a function of the air-void content.

How many tons is 1 cy of asphalt?

If you are looking to calculate the asphalt weight per yard, Willie's Paving notes that 1 cubic yard of hot asphalt mix weighs 2.025 tons. If you are calculating yards to tons of asphalt, multiply your cubic yard value by 2.025 tons to determine the project's amount.

How hot is the air above asphalt?

Asphalt can be 40-60 degrees hotter than the surrounding air temperature. So those common 100 plus summer days can mean we're moving about on a surface as hot as 160 degrees!

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.

Why do they call asphalt AC?

The abbreviation, AC, is sometimes used for asphalt concrete but can also denote asphalt content or asphalt cement, referring to the liquid asphalt portion of the composite material.

What is grade 40 asphalt?

Bitumen penetration grade 40/50 bitumen means the penetration value is in the range 40 to 50 at standard test conditions which commonly used as a Paving Grade. Bitumen is applicable for the production of hot mix asphalt for bases and pavements and for road construction.

What grade asphalt is best for driveways?

The 41A asphalt type is a smoother surface. It is durable, but with a finer rock and sand mixture. This is what most homeowners choose for their driveways.

What is the rule of 90 asphalt?

A rule of thumb to differentiate the polymer modified binder from unmodified binder is to add both low and high temperature grades together, if the sum is greater than 90, it is likely to be a polymer modified binder.

What is the maximum grade for asphalt driveway?

Residential Driveway Requirements. 18', or 12' with turnouts every 500 feet. Grades cannot exceed 15% for more than 200' at a time. This includes vertical curves.

How many square feet will 1 ton of asphalt cover 2 inches thick?

One ton of asphalt covers:

½” or 12.7 mm thick = 95 SqM. 1” or 25.4 mm thick = 48 SqM. 2” or 50.8 mm thick = 24 SqM. 4” or 101.6 mm thick = 12 SqM.

How much weight can 3 inches of asphalt hold?

An asphalt driveway for residential use can hold approximately 8,000 pounds. Most residential driveways require 2″ to 3″ of asphalt for daily use.

How many tons of asphalt for a driveway?

Multiply the length, width and depth together to get your number of cubic feet. Then multiply cubic feet by 145 to know how many pounds of asphalt you will need. Divide pounds by 2,000, the number of pounds in one ton. This will give you the number of tons of asphalt needed for your project.

What is the minimum degree of compaction for asphalt?

What is the recommended air void content for compaction of asphalt pavements? Efforts should be made to control compacted air voids between 7% and 3%. At 8% or higher, interconnected voids which allow air and moisture to permeate the pavement, reducing its durability.

What percent compaction should asphalt be?

The ideal compaction range is typically between 92%- 98% of the theoretical density. As the pavement is being placed, there are several methods of testing asphalt pavement for compaction. The most common method is a Nuclear Density Gauge. The gauge measures compaction as the pavement is placed.

How do you reduce air voids in asphalt?

Filler reduces the air voids and increases the density of the compacted mixture. For each filler content, the higher the density of the mix, the lower the percentage of voids in the mix, and vice versa. This means that the densification of asphalt mixtures is influenced by filler content.

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 most commonly used asphalt mix?

Of all the asphalt types available, hot mix asphalt is the most commonly used on roads, pavements. It is a flexible mix of fine and coarse aggregate and asphalt binder, which produces a highly weather-resistant pavement. Hot Mix Asphalt is heated and poured at temperatures of about 300 to 350 degrees Fahrenheit.

What is Type 7 top asphalt?

Type 7 asphalt contains fine stone and dust which has a very smooth finish. Type 6 asphalt contains slightly larger stone, so it provides more strength but is not quite as smooth as Type 7. Once Sealcoated it is difficult to distinguish the difference in the textures.