304.2R-17:Guide to Placing Concrete by Pumping Methods

304.2R-17:Guide to Placing Concrete by Pumping Methods

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Description

This guide discusses the use of pumps for transporting and placing concrete. Rigid and flexible pipelines, couplings and other accessories, and the various types of concrete pumps are discussed. The importance of proportioning a pumpable concrete mixture is emphasized with reference to sources for further direction on its design. Evaluation of trial mixtures to ensure pumpability and strength is encouraged. Of specific importance is a discussion on the use of lightweight aggregates. Methods to saturate these aggregates and provide a consistent moisture content are discussed.

Preconstruction planning for equipment placement and line routing are emphasized. Discussions on achieving a consistent mixture and its critical importance are also addressed.

Keywords: blockage; boundary layer; concrete pump; coupling; mixture design; pipeline; placing boom; preprimed; pumpability; reverse pumping; valve.

Document Details

Author: ACI Committee 304

Publication Year: 2017

Pages: 0

ISBN: 9781945487828

Categories: Placing

Formats: PDF

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE

1.1—Introduction

1.2—Scope

CHAPTER 2—DEFINITIONS

CHAPTER 3—PUMPING CONCRETE

3.1—Mixture component distribution

3.2—Disruptions to flow

CHAPTER 4—PUMPING EQUIPMENT AND COMPONENTS

4.1—Piston pumps

4.2—Valve types

4.3—Trailer pumps

4.4—Truck-mounted concrete pumps

4.5—Separate placing booms

4.6—Specialized equipment

4.7—Pipeline and accessories

4.8—Flexible system hose types and applications

4.9—Concrete placing system accessories

CHAPTER 5—PUMPABLE CONCRETE

5.1—Basic considerations

5.2—Normalweight aggregate

5.3—Lightweight aggregate concrete

5.4—Water and slump

5.5—Cementitious materials

5.6—Admixtures

5.7—Fiber reinforcement

5.8—Trial mixtures and pumpability testing

5.9—Estimating performance

CHAPTER 6—FIELD PRACTICES

6.1—General

6.2—Pipeline concrete placement

6.3—Powered boom placement

6.4—Equipment and operational safety

6.5—Reduction in air content

CHAPTER 7—FIELD CONTROL

CHAPTER 8—REFERENCES

Authored documents

ERRATA INFO

Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the Manual of Concrete Practice (MCP). For a listing of and access to all product errata, visit the Errata page.

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