Transcription of Chapter 2 Asphalt and Asphalt Paving Materials
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Chapter 2 Asphalt and Asphalt Paving Materials
Asphalt Paving Materials2-1 Asphalt Paving Materials2-1 Chapter 2 Asphalt and Asphalt Paving MaterialsASPHALT DEFINEDThe black cementing agent known as asphalthas been used for road construction forcenturies. Although there are natural depositsof Asphalt , or rock Asphalt , most used today isproduced by the oil refining industry. Asphaltis a constituent of most petroleums and isisolated through the refining process ofdistillation. (See Figure 2-1.) Asphalt is called a bituminous materialbecause it contains bitumen, a hydrocarbonmaterial soluble in carbon disulfate.
paving mixtures. 3. Toughness. ... bituminous mix, bituminous concrete, and many others. It is a combination of two ... uses may be assigned by special design. All designs should provide for a seal coat or sur-face course to provide protection from traffic abrasion and weathering.
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