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What is the difference between penetration and softening point of a bitumen?
The penetration point of Bitumens such as asphalt is the depth in tenths of millimeters a standard weighted needle will penetrate through a given sample of asphalt at a given time and temperature. The softening point of Bitumen such as asphalt is the temperature at which the Bitumen softens at standard conditions. Method of detrmination employs a ball and ring in which the ball falls through the ring after the softening has been reached.
What is the difference between hot asphalt and cold asphalt?
Hot mix asphalt is is heated for application, which thins the material. Remember those steaming metal buckets you used to see on industrial rooftops? Cold asphalt is liquified with something else besides heat. There are two kinds: Emulsified asphalt is mixed with water and an emulsifying agent. Think of it like salad dressing that does not separate in the bottle. The other kind is called Cutback asphalt and is mixed with a petroleum solvent such as naptha, gasoline, or kerosene. They both are liquids at ambient temperature when applied; then the solvent or water evaporates, leaving the asphalt behind. Look up at asphaltinstitute.org
How much does liquid asphalt weigh per gallon?
Liquid asphalt has a specific gravity range from 0.98 to 1.02. Typically, a specific gravity of 1.0 is used. This can vary with the type of asphalt and the temperature of the asphalt. A specific gravity of 1.0 is the same as water measured at the reference temperature of 60 degrees Fahrenheit. This specific gravity of 1.0 corresponds to a density (or specific weight) of 1 gram per cubic centimeter (1 g/cm3) or 62.4 pounds per cubic foot (62.4 lb/ft3) or 8.34 pounds per gallon (8.34 lb/gal)
What is hot mix asphalt?
The main asphalt paving product is hot mix asphalt, in which asphalt cement is used to bind a mixture of stone, sand, and gravel.
How do you dispose of cutback asphalt properly?
asphalt plants that produce emulsified asphalt can recycle it so some will take it for free
Is it okay to lay new asphalt driveway with 40 deg temperature at night after laying it down?
It will not adhere.
Do you remove the plastic strip from the back of asphalt shingles before laying?
YES
Is Asphalt a Newtonian fluid?
At high temperatures such as 275F (135C), asphalt is a Newtonian fluid. At low temperature, asphalt is a non-Newtonian fluid.
How would a temperature reading would be different if the thermometer were over unshaded asphalt?
how would a temperature reading be different if the thermometer were over unshaded asphalt
What is the temperature of liquid asphalt?
4.2 J/g-K
What temperature is asphalt cement shipped at?
I usually load slow cure cutback asphalt cement between 70-75 degrees celsius for shipping.
Why do you asphalt in the summer?
You can lay asphalt any season as long as the air and the ground temperature are in the proper range. below a certain temp it's a definite no-no.
How do infants regulate body temperature?
By feeling or laying
How do you tile over asphalt?
There isn't a good way to tile over asphalt. Because of temperature changes, asphalt expands and contracts on a regular basis and this will cause the tile to crack. Also, tile will allow water to get through and cause a problem with freezing between the asphalt and the tiles.
What is the melting point of asphalt cement?
Asphalt cement is an amorphous polymer, which makes defining the melting point difficult. It's more common to refer to the glassy-transition temperature and the softening temperature. The glassy-transition temperature of asphalt cement is between -35 °C to -10 °C and the softening point ranges from 30 °C to 150 °C. While these temperatures vary for each asphalt, exact values an be determined with a DSC test and the ring and ball test respectfully.
How is the viscosity of asphalt cement affected by temperature?
At high temperatures, the asphalt will become less viscous and more like a free-flowing liquid. At low temperatures, it will solidify.
Working in Asphalt Jobs?
Asphalt jobs are the key to keeping the nation’s roads passable. They are incredibly important to maintaining the infrastructure of highways and local streets. Asphalt work can be hot and sometimes dangerous, but it is very rewarding when you look back and see the long stretch of spotless road that you helped create. Weather Plays a Large Part The daily job of an asphalt worker depends a great deal on the weather. If it is raining, the asphalt can not be laid out. If it is too cold, the asphalt will not cure properly. The weather has to cooperate before an asphalt worker can do his or her job. The main work of an asphalt job is to remove old asphalt and replace it. This process can take several days because of the many layers that make up a typical asphalt road. Asphalt jobs include operating heavy machinery that helps break up the old asphalt and lay out the smooth new asphalt. Physical Fitness is a Necessity Working asphalt jobs requires a certain amount of physical fitness. The workers have to be able to withstand intense heat and constant sunshine during the hot summer days. They also need to have the strength to dig up asphalt when necessary and spread it evenly. The workers who operate the machinery need to have good eye-hand coordination because they are working in a very well-defined area. There is little room for a mistake when you are laying asphalt. Dexterity and an awareness of your surroundings will help you when you are in an area that has a lot of traffic flowing through the asphalt laying operation. General Beginning Salaries Asphalt jobs pay an average of $13 - 21 per hour. The median earnings of someone who operates the asphalt roller range near $34,000 per year. Since the work is somewhat seasonal, you may experience times when you earn quite a lot of money and times when you earn nearly nothing. The pay should even out across the months so that you end up with the $34,000 annual salary range that you should expect. Overtime pay is a substantial raise and a large part of asphalt work.
