ACI 304.2R 96 1996
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304.2R-96: Placing Concrete by Pumping Methods (Reapproved 2008)
| Published By | Publication Date | Number of Pages |
| ACI | 1996 | 25 |
This report describes pumps for transporting and placing concrete. Rigid and flexible pipelines are discussed and couplings and other accessories described. Recommendations for proportioning pumpable concrete suggest optimum gradation of aggregates; outline water, cement, and admixture requirements; and emphasize the need for evaluation of trial mixes for pumpability. The importance of saturating lightweight aggregates is stressed. Suggestions are given for layout of lines; for maintaining uniform delivery rate, as well as uniform quality of concrete at the end of the line; and for cleaning out pipelines. This report does not cover shotcreting or pumping of nonstructural insulating or cellular concrete. Keywords: admixtures; aggregate gradation; aggregates; cement content; coarse aggregates; concrete construction; concretes; conveying; couplings; fine aggregates; fineness modulus; lightweight aggregate concrete; lightweight aggregates; mix proportioning; pipeline; placing; placing boom; pozzolans; pumped concrete; pumps; quality control; water content.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | CONTENTS |
| 2 | CHAPTER 1— INTRODUCTION CHAPTER 2— PUMPING EQUIPMENT 2.1—Piston pumps |
| 3 | 2.2—Types of valves 2.2.1 Hydraulically powered valves 2.2.2 Ball-check concrete pumps |
| 4 | 2.3—Trailer pumps 2.3.1 General 2.3.2 Small general purpose pumps 2.3.3 Medium duty pumps 2.3.4 Special application pumps 2.4— Truck- mounted concrete pumps 2.4.1 Separate engine drive 2.4.2 Truck engine-driven pumps 2.5— Placing booms |
| 5 | 2.6—Specialized equipment 2.7— Safety |
| 6 | CHAPTER 3— PIPELINE AND ACCESSORIES 3.1— General description |
| 7 | 3.2—System pressure capacity |
| 8 | 3.3— Rigid placing line— Straight sections, bends, and elbows 3.4—System connection 3.4.1 Couplings 3.4.2 Gaskets 3.4.3 End configurations |
| 9 | 3.5— Flexible system— Hose types and applications 3.6—Concrete placing system accessories 3.6.1 Valves 3.6.2 Reducers 3.6.3 Support brackets and restraints 3.6.4 System cleanout elements |
| 10 | CHAPTER 4— PROPORTIONING PUMPABLE CONCRETE 4.1— Basic considerations 4.2—Normal weight aggregate 4.2.1 Coarse normal weight aggregate |
| 11 | 4.2.2 Fine normal weight aggregate |
| 14 | 4.2.3 Combined normal weight aggregates 4.3—Lightweight aggregate concrete 4.3.1 Introduction 4.3.2 Increasing moisture content of lightweight aggregate 4.3.2.1 Coarse aggregate |
| 15 | 4.3.2.2 Fine aggregate 4.3.2.3 High percentage saturation 4.3.2.4 Retention of moisture 4.3.3 Coarse lightweight aggregate 4.3.4 Fine lightweight aggregate |
| 16 | 4.3.5 Combined lightweight aggregates 4.4— Water and slump 4.4.1 General |
| 17 | 4.4.2 Water 4.4.3 Slump control 4.5— Cementitious materials 4.6— Admixtures 4.6.1 General |
| 18 | 4.6.2 Normal and high-range water-reducing admixtures 4.6.3 Air-entraining admixtures |
| 19 | 4.6.4 Mineral admixtures |
| 20 | 4.7—Fiber reinforcement 4.8—Trial mixes 4.9—Testing for pumpability CHAPTER 5— FIELD PRACTICES 5.1— General 5.2—Pipeline concrete placement |
| 21 | 5.3— Powered boom placement 5.3.1 Powered placing booms |
| 23 | 5.3.2 Truck-mounted booms |
| 24 | 5.3.3 Remote pedestal booms CHAPTER 6— FIELD CONTROL CHAPTER 7— REFERENCE 7.1— Recommended references 7.2—Cited references |
| 25 | 7.3—Other references APPENDIX 1— METRIC (SI) SYSTEM ADAPTATION A1.1 |
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