Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
Chapter 7
PRODUCTION OF AGGREGATE,
CONCRETE, AND ASPHALT MIXES
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
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.)
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
• Rock Crushers
• Feeders and Screens
• The Crushing Cycle
• Washers and Other Equipment
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
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)
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
Table 7-1. Principal types of rock crushers and their characteristics
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
FIGURE 7-3. Major types of rock crushers.
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
Table 7-2. Gradation of jaw crusher output (percent passing—open circuit)
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
Table 7-3. Gradation of roll crusher output (percent passing—open circuit)
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
FIGURE 7-4. Apron feeder.
FIGURE 7-5. Three-deck vibrating screen.
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
FIGURE 7-6. Estimating screen capacity.
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF AGGREGATE
FIGURE 7-7. Aggregate flow through crushers.
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
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.
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF CONCRETE
• Types of Concrete
• Concrete Components– Cement– Aggregates– Water
– Additives
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF CONCRETE
• Mix Design
• Batching and Mixing
• Estimating Mixer Production
• Transporting and Handling Concrete
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
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)
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
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)
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF CONCRETE
FIGURE 7-8. Truck mixer. (Courtesy of Kenworth Truck Company)
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
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
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF ASPHALT MIXES
FIGURE 7-9. Asphalt batch plant.
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
Construction Methods and Management, 8th ed.S. W. Nunnally
PRODUCTION OF ASPHALT MIXES
FIGURE 7-10. Components of a drum-mix asphalt plant.
Copyright ©2011, 2006 by Pearson Education, Inc.publishing as Pearson [imprint]
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)