highway materials & mix design ppt. mmh
TRANSCRIPT
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HIGHWAY MATERIALS
CE 353
TRANSPORTATION
ENGINEERING II
• Soil
• Aggregates(types, properties, tests)• Bituminous Material(production, types,
tests)• Portland Cement
MIX DESIGN FOR FLEXIBLE PVT.
• Density Void Analysis• Marshall Mix Design• Hveem Method of Mix Design
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HIGHWAY MATERIALS:SOIL
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M d . M e h e d i
H a s n a t ,
L e c t u r e r , C
E , A U S T
Definition: refers to all unconsolidated material in the earth’s crust, all
material above the bedrock”. Includes:
•mineral particles (gravel, sand, silt, clay)
•organic material (top soil, marshes)
Common Soil Types:
Grain Size Classification: Clay, Silt, Sand, Gravel, Cobble [Figure
15-1]Mixed: Loam, Loess, Muck, Peat.
Classification in Highway (AASHTO & Unified)Basic Soil Properties:(Important in Highway Design & Construction)
Moisture Content
Specific GravityUnit Weight
Shearing Resistance
Others: Permeability, Capillarity, Shrinkage, Swelling,
Compressibility, Elasticity
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HIGHWAY MATERIALS: AGGREGATES
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M d . M e h e d i
H a s n a t ,
L e c t u r e r , C
E , A U S T
Definition: mineral particles of a soil specifically, granular soil group:
Coarse Agg.: retained on No.10 sieve (2mm).Stone, Gravel, Coarse
Sand.Fine Agg.: passing No. 10 sieve. Fin Sand.
Mineral Filler: passing a 0.075-mm (No. 200).Silt & Clay
Coarse-Grained Soils: More than 50 %
retained on a 0.075 mm (No. 200) sieve
Fine-Grained Soils: 50 % or more passes a0.075 mm (No. 200) sieve
10 – 2mm
**Others: 12 Classes of aggregates as
per ASTM D 2487: see
http://www.pavementinteractive.org/
article/astm-aggregate-and-soil-
terminology/
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AGGREGATES:PROPERTIES OF AGGREGATES
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M d . M e