ACI 334.3R 05 2005
$40.35
334.3R-05: Construction of Concrete Shells Using Inflated Forms
| Published By | Publication Date | Number of Pages |
| ACI | 2005 | 13 |
This report provides information on the construction of structural concrete shells using an inflated form. Major facets of the construction process are covered, including foundations, inflation, monitoring, and backup systems. Other aspects, such as the geometric variations of inflated forms, thickness of polyurethane foam, and mixture proportions for shotcrete, are also considered. Keywords: dome; fabric; inflation; polyurethane foam; reinforcement; shotcrete; thin shell.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | CONTENTS |
| 2 | CHAPTER 1— GENERAL 1.1- Introduction ( Fig. 1.1) 1.2—Scope (Fig. 1.2) 1.3—History (Fig. 1.3) |
| 3 | 1.4—Methods (Fig. 1.7) 1.5—Definitions |
| 4 | 1.6—Preconstruction 1.7—Work schedule CHAPTER 2— FOUNDATIONS 2.1- General 2.2—Concrete 2.3—Soil conditions |
| 5 | 2.4—Reinforcement material 2.5—Placement of reinforcement 2.6—Placement of anchors 2.7—Concrete placement |
| 6 | 2.8—Foundation dowels 2.9—Uplift prevention CHAPTER 3— INFLATED FORMS 3.1- General 3.2—Inflated form material and manufacturing 3.2.1 Shape 3.2.2 Size 3.2.3 Fabric |
| 7 | 3.2.3.1 Fabric stress 3.2.3.2 Allowable fabric stress 3.2.4 Fabrication 3.3—Field layout 3.4—Form protection 3.5—Initial stretching 3.6—Inflation |
| 8 | 3.7—Construction tolerances 3.8—Air pressure maintenance 3.8.1 Backup air pressure systems 3.8.2 Air pressure monitoring 3.9—Collapse prevention 3.10—Miscellaneous connections |
| 9 | 3.11—Fabric form repair 3.12—Polyurethane foam (when used) 3.13—Preparation 3.14—Foam application 3.15—Construction hazards 3.15.1 Wind 3.15.2 Construction loads 3.15.3 Proper venting CHAPTER 4— SHOTCRETE DOME 4.1- General |
| 10 | 4.2—Reinforcement material and size 4.2.1 Material 4.2.2 Size 4.3—Clear spacing between bars 4.4—Splices 4.5—Cover 4.6—Preliminary reinforcement mat (premat) 4.7—Shell reinforcement 4.8—Preconstruction shotcrete tests 4.9—Shotcrete compression tests 4.9.1 Sampling 4.9.2 Panel criteria |
| 11 | 4.9.3 Acceptance criteria 4.10—Proportions and materials 4.10.1 Fine aggregate (sand) 4.10.2 Coarse aggregate 4.10.3 Water 4.10.4 Admixtures 4.10.5 Rebound 4.11—Field practice 4.12—Nozzle operator qualifications 4.13—Shotcrete operation |
| 12 | 4.14—Discharge time 4.15—Joints 4.16—Multi-pass technique 4.17—Curing 4.18—Shotcrete placement tolerance 4.19—Shotcrete damage |
| 13 | 4.20—Completion CHAPTER 5— REFERENCES 5.1- Referenced standards and reports 5.2—Cited references |
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