Construction Methods & Materials 3

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Construction Methods and Management, 8th ed. S. W. Nunnally

Chapter 7

PRODUCTION OF AGGREGATE, CONCRETE, AND ASPHALT MIXES

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

To produce quality aggregate, rock or gravel must be excavated, loaded, and transported to an aggregate processing plant (crushing plant).

FIGURE 7-1. Aggregate processing plant. (Courtesy of Cedarapids, Inc.)

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

Rock Crushers
Feeders and Screens
The Crushing Cycle
Washers and Other Equipment

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

FIGURE 7-2. Portable cone crusher. (Courtesy of Kolberg-Pioneer, Inc., and Johnson Crushers International)

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

Table 7-1. Principal types of rock crushers and their characteristics

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

FIGURE 7-3. Major types of rock crushers.

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

Table 7-2. Gradation of jaw crusher output (percent passing—open circuit)

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

Table 7-3. Gradation of roll crusher output (percent passing—open circuit)

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

FIGURE 7-4. Apron feeder.

FIGURE 7-5. Three-deck vibrating screen.

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

FIGURE 7-6. Estimating screen capacity.

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF AGGREGATE

FIGURE 7-7. Aggregate flow through crushers.

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF CONCRETE

Concrete is produced by mixing portland cement, aggregate, and water.
In addition, a fourth component, an additive, may be added to improve the workability or other properties of the concrete mix.

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF CONCRETE

Types of Concrete
Concrete Components
Cement
Aggregates
Water
Additives

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF CONCRETE

Mix Design
Batching and Mixing
Estimating Mixer Production
Transporting and Handling Concrete

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF CONCRETE

Table 7-4. Maximum water-cementitious material ratios and minimum design strengths for various exposure conditions (Courtesy of Portland Cement Association)

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF CONCRETE

Table 7-5. Recommended slumps for various types of construction (Courtesy of Portland Cement Association)

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF CONCRETE

FIGURE 7-8. Truck mixer. (Courtesy of Kenworth Truck Company)

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF ASPHALT MIXES

Asphalt and Other Bituminous Materials
Handling Bituminous Materials
Asphalt Plants
Estimating Asphalt Plant Production

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF ASPHALT MIXES

FIGURE 7-9. Asphalt batch plant.

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF ASPHALT MIXES

FIGURE 7-10. Components of a drum-mix asphalt plant.

Construction Methods and Management, 8th ed. S. W. Nunnally

PRODUCTION OF ASPHALT MIXES

FIGURE 7-11. Insulated hot-mix asphalt storage bin with skip hoist. (Courtesy of Terex Road Building)