Asphalt adds to air pollution, especially on hot, sunny days
Asphalt is a near-ubiquitous substance—it's found in roads, on roofs and in driveways—but its chemical emissions rarely figure into urban air quality management plans.
Asphalt is a near-ubiquitous substance—it's found in roads, on roofs and in driveways—but its chemical emissions rarely figure into urban air quality management plans.
Environment
Sep 2, 2020
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570
(PhysOrg.com) -- A lake of natural hot liquid asphalt in Trinidad and Tobago has been found to be teeming with microbes despite the toxic environment. The lake, aptly named Pitch Lake (since pitch is the old name for tar), ...
Santa Barbara Channel's natural oil seeps are a beach-goer's bane, flecking the shores with blobs of tar. But the leaking petroleum also creates fascinating geologic and biologic features. About 10 miles off the coast of ...
Plants & Animals
Feb 13, 2023
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39
A novel and eco-friendly nano asphalt binder has been developed by researchers at Swansea University and the Technical University of Braunschweig.
Nanomaterials
Mar 29, 2022
1
142
Warm mix asphalt (WMA) is gaining attention in the asphalt industry as an eco-friendly and sustainable technology.
Nanomaterials
Jun 22, 2021
1
19
Scientists have revealed that the deterioration of modern concrete and asphalt structures is due to the presence of trace quantities of organic matter in these structures.
Materials Science
May 13, 2021
0
674
A color developed by Egyptians thousands of years ago has a modern-day application as well – the pigment can boost energy efficiency by cooling rooftops and walls, and could also enable solar generation of electricity via ...
General Physics
Oct 10, 2018
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877
A touch of asphalt may be the secret to high-capacity lithium metal batteries that charge 10 to 20 times faster than commercial lithium-ion batteries, according to Rice University scientists.
Nanomaterials
Oct 2, 2017
14
449
A Rice University laboratory has improved its method to turn plain asphalt into a porous material that can capture greenhouse gases from natural gas.
Materials Science
Sep 13, 2016
0
16
Construction crews may someday use a plant molecule called lignin in their asphalt and sealant mixtures to help roads and roofs hold up better under various weather conditions. It also could make them more environmentally ...
Materials Science
Mar 22, 2015
7
2816
Asphalt /ˈæsfɔːlt/ ( listen) or /ˈæsʃfɛlt/, also known as bitumen, is a sticky, black and highly viscous liquid or semi-solid that is present in most crude petroleums and in some natural deposits, it is a substance classed as a pitch. Until the 20th century, the term asphaltum was also used.
The primary use of asphalt is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete. Its other main uses are for bituminous waterproofing products, including production of roofing felt and for sealing flat roofs.
The terms asphalt and bitumen are often used interchangeably to mean both natural and manufactured forms of the substance. In American English, asphalt (or asphalt cement) is the carefully refined residue from the distillation process of selected crude oils. Outside the United States, the product is often called bitumen. Natural deposits terminology also sometimes uses the word bitumen, such as at the La Brea Tar Pits.
Naturally occurring asphalt is sometimes specified by the term "crude Bitumen"; its viscosity is similar to that of cold molasses. whilst the material obtained from the fractional distillation of crude oil (boiling at 525 °C (977 °F)) is sometimes referred to as "refined bitumen".
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