Lesson Concrete Components
Mixing Water
Describing and Measuring Ingredients
Hardened Concrete
American Society for Testing and Materials (ASTM) Types
Packaging and Shipping
Table 1-1. Aggregate characteristics and standards tests
Figure 1-1. Limits specified in ASTM C33 for fine-aggregates and for one size of coarse-aggregate
Table 1-2. FM ranges for fine aggregate
Table 1-3. Grading requirements for coarse aggregate
Bulk Unit Weight
Absorption and Surface Moisture
Impurities
Figure 1-6. Correct and incorrect aggregate handling and storage.
Definition and Purpose
Air-Entrained Concrete
Factors Affecting Air Content
Recommended Air Contents
Water-Reducing Admixtures
Part C -Slump Test Method and Equipment
Testing and Procedures
Lesson 1 Practice Exercise - EN5466A0028
Answer Key and Feedback - EN5466A0029
Lesson 2 Proportioning Concrete Mixtures
Water and Cement Ratio
Table 2- 1. Maximum w/c ratio for various exposure conditions
Table 2-3. Minimum cement requirements for concrete used in flatwork
Entrained Air
Part B -Trial Batch Method Determining Water/Cement Ratio
Using Trial Batch Method (Example)
Figure 2-1. Worksheet for concrete trial mix data
Figure 2-2. Appearance of concrete mixes containing correct and incorrect amounts of water
Figure 2-2. Appearance of concrete mixes containing correct and incorrect amounts of mortar.
Figure 2-2. Appearance of concrete mixes containing correct and incorrect amounts of mortar -Cont.
Table 2-5. Results of laboratory trial mixes
Part C- Absolute Volume Method Basic Guidelines
Table 2-6. Volume of coarse aggregate per cubic yard of concrete
Figure 2-4. Absolute volume
Using Absolute Volume Method (Example)
Calculate FA Content by Absolute Volume Method
Determine Proportions for First Trial Batch (for 1 cy) by Converting Absolute Volumes to Dry Volumes
Part D-Adjustments to the Original Design
Figure 2-6. Wet sand
Figure 2-7. Very wet sand
Figure 2-8. Bulking factor curves
Materials Estimation
Figure 2-9. Retaining wall
Lesson 2 Practical Problem
Specifications
Specifications -Cont. - EN5466A0056
Specifications -Cont. - EN5466A0057
Answers to Practical Problem
Answers to Practical Problem -Cont. - EN5466A0059
Answers to Practical Problem -Cont. - EN5466A0060
Lesson 2 Practice Exercise - EN5466A0062
Answer Key and Feedback - EN5466A0063
Answer Key and Feedback -Cont. - EN5466A0064
Lessons 3 Form Design and Construction
Form Characteristics
Figure 3-2. Form for a concrete column and footing
Part B -Using Form Design Principles
Figure 3-3. Maximum concrete pressure graph
Table 3-1. Maximum stud (joist) spacing for board sheathing
Table 3-2. Maximum stud (joist) spacing for plywood sheathing, in
Panel Wall Form Design
Table 3-3. Maximum spacing for wales, ties, stringers, and 4- by 4 inch or larger Shores
Panel Wall Form Design -Cont.
Table 3-4. Maximum spacing for ties and 4 by 4s or larger shores where member to be supported is a double member (in)
Table 3-5. Average breaking load of tie material (lb)
Example Problem 1
Example Problem 2
Nomenclature
Figure 3-4. Elements of diagonal bracing
Table 3-6. J factors
Procedure - EN5466A0083
Overhead Slab Form Design
Procedure - EN5466A0085
Table 3-7. Allowable load, in pounds, on wood shores, based on shore strength.
Table 3-8. Allowable load on specified shore, based on bearing stresses where the maximum shore area is in contact with the supported member
Example Problem
Column Form Design
Table 3-9. Column yoke spacing using 2- by 4-inch and 1-inch sheathing
Lesson 3 Practical Problems
Table 3-10. Natural trigonometric functions
Figure 3-6. Column form design
Answer: Problem 1
Answer: Problem 1 -Cont.
Answer: Problem 4
Answer: Problem 5
Lesson 3 Practice Exercise - EN5466A0099
Lesson 3 Practice Exercise -Cont. - EN5466A0101
Answer Key and Feedback - EN5466A0102
Answer Key and Feedback -Cont. - EN5466A0103
Lesson 4 Construction Procedures
Site Preparation
Lumber at Construction Sites
Part C -Mixing, Handling, Transportation , Placement, Finishing, and Curing of Concrete
Figure 4-1. Measuring aggregate by weight
Machine Mixing and Delivery
Figure 4-3. Typical on-site arrangement of mixing equipment and materials
Operating the 16-Cubic-Foot Mixer
Figure 4-4. Charging mixer with mechanical skip
Table 4-2. Physical characteristics of the M919 concrete mobile mixer unit
Figure 4-5. Concrete handling techniques to prevent segregation
Transportation Requirements
Placing Concrete
Figure 4-6. Concrete placing techniques
Wall Construction
Figure 4-7. Using a vibrator to consolidate concrete
Finishing Operations
Figure 4-9. Screeding operation
Figure 4-10. Wood floats and floating operations
Rubbing
Length of Curing Period
Part D -Temperature Effects on Concrete
Compressive Strength of Concrete
Cooling Concrete Materials
Figure 4-15. Mixing water temperatures required to produce concrete of required temperatures
Cold-Weather Concreting
Effects on Low Concrete Temperatures
Heating Concrete Ingredients
Figure 4-18. Effects of temperature of materials on temperature of fresh concrete
Using High Early-Strength Cement
Form Removal and Stripping
Table 4-6. Recommended form stripping times
Lesson 4 Practice Exercise - EN5466A0137
Lesson 4 Practice Exercise -Cont. - EN5466A0139
Answer Key and Feedback - EN5466A0140
Answer Key and Feedback -Cont. - EN5466A0141
US Army Engineer Center and School
Mixing Water
Describing and Measuring Ingredients
Hardened Concrete
American Society for Testing and Materials (ASTM) Types
Packaging and Shipping
Table 1-1. Aggregate characteristics and standards tests
Figure 1-1. Limits specified in ASTM C33 for fine-aggregates and for one size of coarse-aggregate
Table 1-2. FM ranges for fine aggregate
Table 1-3. Grading requirements for coarse aggregate
Bulk Unit Weight
Absorption and Surface Moisture
Impurities
Figure 1-6. Correct and incorrect aggregate handling and storage.
Definition and Purpose
Air-Entrained Concrete
Factors Affecting Air Content
Recommended Air Contents
Water-Reducing Admixtures
Part C -Slump Test Method and Equipment
Testing and Procedures
Lesson 1 Practice Exercise - EN5466A0028
Answer Key and Feedback - EN5466A0029
Lesson 2 Proportioning Concrete Mixtures
Water and Cement Ratio
Table 2- 1. Maximum w/c ratio for various exposure conditions
Table 2-3. Minimum cement requirements for concrete used in flatwork
Entrained Air
Part B -Trial Batch Method Determining Water/Cement Ratio
Using Trial Batch Method (Example)
Figure 2-1. Worksheet for concrete trial mix data
Figure 2-2. Appearance of concrete mixes containing correct and incorrect amounts of water
Figure 2-2. Appearance of concrete mixes containing correct and incorrect amounts of mortar.
Figure 2-2. Appearance of concrete mixes containing correct and incorrect amounts of mortar -Cont.
Table 2-5. Results of laboratory trial mixes
Part C- Absolute Volume Method Basic Guidelines
Table 2-6. Volume of coarse aggregate per cubic yard of concrete
Figure 2-4. Absolute volume
Using Absolute Volume Method (Example)
Calculate FA Content by Absolute Volume Method
Determine Proportions for First Trial Batch (for 1 cy) by Converting Absolute Volumes to Dry Volumes
Part D-Adjustments to the Original Design
Figure 2-6. Wet sand
Figure 2-7. Very wet sand
Figure 2-8. Bulking factor curves
Materials Estimation
Figure 2-9. Retaining wall
Lesson 2 Practical Problem
Specifications
Specifications -Cont. - EN5466A0056
Specifications -Cont. - EN5466A0057
Answers to Practical Problem
Answers to Practical Problem -Cont. - EN5466A0059
Answers to Practical Problem -Cont. - EN5466A0060
Lesson 2 Practice Exercise - EN5466A0062
Answer Key and Feedback - EN5466A0063
Answer Key and Feedback -Cont. - EN5466A0064
Lessons 3 Form Design and Construction
Form Characteristics
Figure 3-2. Form for a concrete column and footing
Part B -Using Form Design Principles
Figure 3-3. Maximum concrete pressure graph
Table 3-1. Maximum stud (joist) spacing for board sheathing
Table 3-2. Maximum stud (joist) spacing for plywood sheathing, in
Panel Wall Form Design
Table 3-3. Maximum spacing for wales, ties, stringers, and 4- by 4 inch or larger Shores
Panel Wall Form Design -Cont.
Table 3-4. Maximum spacing for ties and 4 by 4s or larger shores where member to be supported is a double member (in)
Table 3-5. Average breaking load of tie material (lb)
Example Problem 1
Example Problem 2
Nomenclature
Figure 3-4. Elements of diagonal bracing
Table 3-6. J factors
Procedure - EN5466A0083
Overhead Slab Form Design
Procedure - EN5466A0085
Table 3-7. Allowable load, in pounds, on wood shores, based on shore strength.
Table 3-8. Allowable load on specified shore, based on bearing stresses where the maximum shore area is in contact with the supported member
Example Problem
Column Form Design
Table 3-9. Column yoke spacing using 2- by 4-inch and 1-inch sheathing
Lesson 3 Practical Problems
Table 3-10. Natural trigonometric functions
Figure 3-6. Column form design
Answer: Problem 1
Answer: Problem 1 -Cont.
Answer: Problem 4
Answer: Problem 5
Lesson 3 Practice Exercise - EN5466A0099
Lesson 3 Practice Exercise -Cont. - EN5466A0101
Answer Key and Feedback - EN5466A0102
Answer Key and Feedback -Cont. - EN5466A0103
Lesson 4 Construction Procedures
Site Preparation
Lumber at Construction Sites
Part C -Mixing, Handling, Transportation , Placement, Finishing, and Curing of Concrete
Figure 4-1. Measuring aggregate by weight
Machine Mixing and Delivery
Figure 4-3. Typical on-site arrangement of mixing equipment and materials
Operating the 16-Cubic-Foot Mixer
Figure 4-4. Charging mixer with mechanical skip
Table 4-2. Physical characteristics of the M919 concrete mobile mixer unit
Figure 4-5. Concrete handling techniques to prevent segregation
Transportation Requirements
Placing Concrete
Figure 4-6. Concrete placing techniques
Wall Construction
Figure 4-7. Using a vibrator to consolidate concrete
Finishing Operations
Figure 4-9. Screeding operation
Figure 4-10. Wood floats and floating operations
Rubbing
Length of Curing Period
Part D -Temperature Effects on Concrete
Compressive Strength of Concrete
Cooling Concrete Materials
Figure 4-15. Mixing water temperatures required to produce concrete of required temperatures
Cold-Weather Concreting
Effects on Low Concrete Temperatures
Heating Concrete Ingredients
Figure 4-18. Effects of temperature of materials on temperature of fresh concrete
Using High Early-Strength Cement
Form Removal and Stripping
Table 4-6. Recommended form stripping times
Lesson 4 Practice Exercise - EN5466A0137
Lesson 4 Practice Exercise -Cont. - EN5466A0139
Answer Key and Feedback - EN5466A0140
Answer Key and Feedback -Cont. - EN5466A0141
US Army Engineer Center and School
