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Dense Bituminous Macadam (DBM) Construction Requirements

Acceptance Criteria of Construction Materials for Dense Bituminous Macadam: The following materials shall be used for the activity. 1.1. Bitumen for DBM work: Paving Bitumen of penetration grade S-65 complying with Indian Standard Specifications for Paving Bitumen IS:73 and Contract Technical Specification shall be used. 1.2

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Specification for Bituminous Macadam

4.5.3 The bitumen macadam shall be rolled in the longitudinal direction with the roller as close to the pave as possible. The overlap on successive passes should be at least one-third of the width of the rear roll or in the case of pneumatic wheeled rollers, at least the nominal width of 300mm.

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Types of Bitumen Mixes for Pavements -Applications in Road

Open Graded Bitumen Base Mixes. Three open graded mix types are employed as the base mixes. They are the. Asphalt Treated Permeable Base (ATPB) Bituminous Macadam(BM) Built up Spray Grout (BUSG) Asphalt Treated Permeable Base (ATPB) Permeable asphalt treated base (PATB) is used extensively on major highway construction in the US.

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Asphalt vs. Macadam - What's the difference? | Ask Difference

Apr 07, 2018 · Main Difference. The main difference between Asphalt and Macadam is that the Asphalt is a sticky, black and highly viscous liquid or semi-solid form of petroleum; bitumen variety and Macadam is a type of road construction pioneered by Scottish engineer John Loudon McAdam.

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Everything You Need To Know About Asphalt Paving

Hot mix asphalt (HMA) is the designation given to asphalt mixtures that are heated and poured at temperatures between 300 and 350 degrees Fahrenheit. It is the most commonly used asphalt. HMA can be classified into three categories, including dense-graded mixes, stone matrix asphalt and open grade mixes.

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