Description
This document provides a guide for owners, contractors, designers, and testing, specifying, and inspection organizations engaged in the application of shotcrete for underground support. The guide provides general information for the selection of constitue
Contents: Chapter 1—Introduction and scope, p. 506.5R-3
1.1—Introduction
1.2—Scope
Chapter 2—Notation and definitions, p. 506.5R-5
2.1—Notation
2.2—Definitions
Chapter 3—Submittals, p. 506.5R-6
3.1—Contracts
3.2—Recommended specifications
Chapter 4—Materials, p. 506.5R-8
4.1—Accelerators
4.2—Recommended specifications
Chapter 5—Anchorage and reinforcement, p. 506.5R-11
5.1—Composite support systems
5.2—Shotcrete with pattern rock bolts or anchors
5.3—Shotcrete with rock bolts, friction stabilizers, and welded wire reinforcement
5.4—Fiber-reinforced shotcrete
5.5—Shotcrete with lattice girders
5.6—Shotcrete with conventional steel sets
5.7—Recommended specifications
Chapter 6—Materials handling and storage, p. 506.5R-15
6.1—General
6.2—Temperature considerations
6.3—Recommended specifications
Chapter 7—Shotcrete mixture proportioning, p. 506.5R-16
7.1—General
7.2—Mixture proportions by trial batching or historical data submissions
7.3—In-place mixture proportions
7.4—Dry-mix shotcrete
7.5—Wet-mix shotcrete
7.6—Recommended specifications
Chapter 8—Performance requirements, p. 506.5R-20
8.1—General
8.2—Water-cementitious material ratio
8.3—Air content
8.4—Slump
8.5—Boiled absorption and permeable voids
8.6—Compressive strength
8.7—Flexural strength and toughness
8.8—Early-age strength
8.9—Other tests
8.10—Bond strength
8.11—Explosive spalling protection
8.12—Recommended specifications
Chapter 9—Quality assurance and quality control, p. 506.5R-23
9.1—General
9.2—Recommended specifications
Chapter 10—Preconstruction trials and testing, p. 506.5R-24
10.1—General
10.2—Recommended specifications
Chapter 11—Construction acceptance inspection, p. 506.5R-27
11.1—General
11.2—Acceptance inspection
11.3—Specific inspection and test quality control
requirements for underground shotcrete
11.4—Cold placement conditions
11.5—Hot placement conditions
11.6—Shotcrete acceptance and rejection
11.7—Recommended specifications
Chapter 12—Batching, mixing, and supply, p. 506.5R-31
12.1—Handling of bulk bin-bags
12.2—Quality control considerations
12.3—Recommended specifications
Chapter 13—Placing equipment, p. 506.5R-34
13.1—Pumps
13.2—Guns
13.3—Nozzle systems
13.4—Remote-controlled spraying
13.5—Recommended specifications
Chapter 14—Auxilliary equipment, p. 506.5R-37
14.1—Air supply
14.2—Recommended specifications
Chapter 15—Safety, p. 506.5R-39
15.1—General
15.2—Underground safety
15.3—Required personal safety equipment
15.4—View of shotcrete work
15.5—Communications
15.6—Nonpersonal safety equipment
15.7—Recommended specifications
Chapter 16—Preparation for shotcreting and groundwater control, p. 506.5R-41
16.1—General
16.2—Factors affecting shotcrete adhesion and bonding
16.3—Surface preparation
16.4—Groundwater
16.5—Recommended specifications
Chapter 17—Ground reinforcement installation, p. 506.5R-43
17.1—General
17.2—Rock bolt installation
17.3—Steel set installation
17.4—Lattice girder installation
17.5—Recommended specifications
Chapter 18—Shotcrete application, p. 506.5R-44
18.1—Methods used to control thickness
18.2—Cover, alignment, and tolerance
18.3—Recommended specifications
Chapter 19—Curing and protection, p. 506.5R-46
19.1—General
19.2—Protection
19.3—Recommended specifications
Chapter 20—Shotcrete for repair and rehabilitation of underground structures, p. 506.5R-47
20.1—General
20.2—Materials selection
20.3—Shotcrete placement methods for repair
20.4—Quality assurance requirements for rehabilitation
of underground structures
20.5—Repair considerations
20.6—Recommended specifications
Chapter 21—Measurement and payment, p. 506.5R-50
21.1—Basis for payment
21.2—Recommended specifications
Chapter 22—References, p. 506.5R-51
22.1—Referenced standards and reports
22.2—Cited references
