Why sand is found spread on a newly constructed
black topped roads
Answers
Explanation:
A road surface or pavement is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or walkway. In the past, gravel road surfaces, cobblestone and granite setts were extensively used, but these surfaces have mostly been replaced by asphalt or concrete laid on a compacted base course. Asphalt mixtures have been used in pavement construction since the beginning of the twentieth century. These roads are of two types: metalled roads and unmetalled roads. Metalled roadways are made to sustain vehicular load, so these type of surfaces are usually made on frequently-used roads. Unmetalled roads, also known as gravel roads, are rough and can't sustain much weight. Road surfaces are frequently marked to guide traffic. Today, permeable paving methods are beginning to be used for low-impact roadways and walkways. Pavements are crucial to countries such as US and Canada, which heavily depend on road transportation. Therefore, research projects such as Long-Term Pavement Performance have been launched to optimize the life-cycle of different road surfaces.[1][2][3][4]