Which category represents the highest standard of construction among bituminous pavements ?
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Answer: D. bituminous concrete
Explanation
Bituminous concrete represents the highest quality and most structurally robust paving material among all conventional bituminous surface course categories. It consists of a dense graded aggregate mixture bound with high quality bitumen, engineered to withstand heavy repeated traffic loads. Its superior particle interlock and void characteristics provide exceptional resistance to permanent deformation, rutting, and heavy wheel load stresses. Production of bituminous concrete requires strict laboratory mix design procedures like the Marshall method to optimize asphalt binder content. Aggregates are heated, combined with precise bitumen proportions in asphalt plants, laid with pavers, and compacted to specified density targets. The resulting mixture exhibits high stability, durability, and impermeability against moisture penetration under heavy commercial vehicle traffic.
Option A describes mastic asphalt, a voidless material used for waterproofing and specialized industrial flooring rather than heavy highway paving. Option B refers to sheet asphalt, a fine aggregate mix lacking the coarse stone skeleton needed for heavy duty highway structural applications. Option C denotes a bituminous carpet, which is a much thinner, lower standard wearing course intended for roads with moderate traffic volumes.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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