Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Free Floating Screed shopping experience:
1. Compare - without doubt the biggest advantage that the Free Floating Screed offers shoppers today is the ability to compare thousands of Free Floating Screed at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Free Floating Screed? Wrong! If the Free Floating Screed is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Free Floating Screed then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Free Floating Screed? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Free Floating Screed and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Free Floating Screed wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Free Floating Screed then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Free Floating Screed site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Free Floating Screed, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Free Floating Screed, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
The
free floating screed is a device pioneered by
Barber Greene Company in the
1930s that revolutionized the
asphalt paving process.The device is designed to flatten the material (e.g. concrete or
asphalt) below it, which is also known as
screed.
Description
The free floating screed has a number of forces acting on it that, when in
Mechanical equilibrium, allow the depth behind the screed to be constant.
- Tow arm pull: the force exerted on the screed by the paver dragging it
- Mass: the weight of the screed
- Resistance of the head of material: the opposing force exerted on the screed by the pile of material in front of the screed. This force depends in turn on the material's viscosity and mass.
The
angle at which the tow arm pull is exerted on the screed also contributes to the
Motion (physics); its resultant force is either added or subtracted from the mass of the screed.
If each of these forces is constant, altering the angle of the screed to the horizontal (angle of attack) will control the amount of material extrusion behind the screed. Increasing the angle of attack will cause the screed to climb higher through the pile of material, and therefore raise its trailing edge, increasing the amount of material extruded behind the screed. Similarly, reducing the angle of attack will reduce the amount of material extruded.
The free floating screed has become standard because of the smoothing or averaging effect it can have on the existing
base course. Since the only connection between the asphalt paver and the screed is the tow arm, the screed can "float" vertically relative to the paver. This allows the paver to traverse uneven ground while the screed floats over the material placed in front of it.
Market domination
Barber Greene dominated the market until the patent expired in
1955, and now all major asphalt paver manufacturers use this design principle in their equipment.
External links
- History of Highways, National Asphalt Pavement Association
The
free floating screed is a device pioneered by Barber Greene Company in the
1930s that revolutionized the
asphalt paving process.The device is designed to flatten the material (e.g. concrete or
asphalt) below it, which is also known as
screed.
Description
The free floating
screed has a number of forces acting on it that, when in
Mechanical equilibrium, allow the depth behind the screed to be constant.
- Tow arm pull: the force exerted on the screed by the paver dragging it
- Mass: the weight of the screed
- Resistance of the head of material: the opposing force exerted on the screed by the pile of material in front of the screed. This force depends in turn on the material's viscosity and mass.
The angle at which the tow arm pull is exerted on the screed also contributes to the
Motion (physics); its resultant force is either added or subtracted from the mass of the screed.
If each of these forces is constant, altering the angle of the screed to the horizontal (angle of attack) will control the amount of material
extrusion behind the screed. Increasing the angle of attack will cause the screed to climb higher through the pile of material, and therefore raise its trailing edge, increasing the amount of material extruded behind the screed. Similarly, reducing the angle of attack will reduce the amount of material extruded.
The free floating screed has become standard because of the smoothing or averaging effect it can have on the existing
base course. Since the only connection between the asphalt paver and the screed is the tow arm, the screed can "float" vertically relative to the paver. This allows the paver to traverse uneven ground while the screed floats over the material placed in front of it.
Market domination
Barber Greene dominated the market until the patent expired in 1955, and now all major asphalt paver manufacturers use this design principle in their equipment.
External links
- History of Highways, National Asphalt Pavement Association
