ACI 304.4R 95 1995
$20.85
304.4R-95: Placing Concrete with Belt Conveyors (Reapproved 2008)
| Published By | Publication Date | Number of Pages |
| ACI | 1995 | 15 |
This state-of-the-art report includes a short history on the early development of conveyor belts for transporting and placing concrete. The design of conveyor systems is discussed in relation to the properties of the plastic concrete, the delivery rate and the job specifications. Belt widths, speeds, and angles of inclination are considered art they apply to specific site requirements. The three types of concrete conveyors are the portable, feeder, and spreader types and their particular applications are covered. Field practices in the selection, use and maintenance of conveyors are described. The economics of belt conveyor placement is discussed. The quality of the in-place concrete and inspection procedures are stressed. Keywords: belt conveyors; concrete construction; concretes, conveying; conveyors; economics; feeders; fresh concretes; inspection; maintenance; placing; quality control; workability.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | CHAPTER 1— INTRODUCTION 1.1— General 1.2— History 1.3—Concrete conveyor development CHAPTER 2— DESIGN CONSIDERATIONS 2.1— General requirements |
| 3 | 2.2—Concrete ribbon parameters 2.2.1 Angle of surcharge 2.2.2 Minimum edge distance 2.2.3 Load cross section |
| 4 | 2.3— Belt charging 2.4— Belt discharge 2.5—Belt conveyor design principles 2.5.1 Belt materials 2.5.2 Belt splicing 2.5.2.1 Mechanically fastened splice 2.5.2.2 Vulcanized splice 2.5.3 Belt training 2.5.4 Belt width |
| 5 | 2.5.5 Theoretical capacity 2.5.6 Belt speed 2.5.7 Belt idlers and belt tension |
| 6 | 2.5.8 Belt enclosures 2.6—Concrete mixture proportioning for conveying 2.7—Specifications |
| 7 | CHAPTER 3— TYPES OF CONVEYORS AND FUNCTIONS 3.1— General 3.2—Portable conveyors 3.3—Feeder conveyors |
| 9 | 3.4—Spreading conveyors 3.4.1 Radial spreaders |
| 11 | 3.4.2 Side discharge conveyors |
| 12 | 3.5—Conveyor combinations 3.6—Special belt conveyors 3.7— Economics of conveyor placement |
| 13 | CHAPTER 4— FIELD PRACTICE 4.1—Selection of conveyors 4.2—Actual capacity 4.3—Conveyor charging |
| 14 | 4.4—Discharge control 4.5— Maintenance 4.5.1 Belt tension adjustment 4.5.2 Belt wiper adjustment 4.5.3 Equipment cleanup CHAPTER 5— INSPECTION AND TESTING 5.1—Concrete inspection 5.2—Testing |
| 15 | CHAPTER 6— REFERENCES 6.1— Recommended reference 6.2—Cited references 6.3— Additional references |
