555R-01
Removal and Reuse of Hardened Concrete
2001, 26 pp.
$50.50

This report presents information on removal and reuse of hardened concrete. Guidance for assessment of concrete structures for complete or partial demolition is provided. The applicability, advantages, limitations, and

safety considerations of various types of concrete removal methods, including hand tools, hand-operated power tools, vehicle-mounted equipment,

explosive blasting, drills and saws, nonexplosive demolition agents,

mechanical splitters, heating and thermal tools, and hydrodemolition

(water-jet blasting), are provided. The available surface removal systems,

their probable applications, and advantages and disadvantages of various

types of surface removal systems are discussed. Considerations for evaluating and processing waste concrete for production of aggregates suitable for

reuses in concrete construction are presented.

Contents:
CONTENTS

Chapter 1 Introduction, p. 555R-2

1.1 Scope

1.2 Objective

Chapter 2 Kinds of concrete and degree of

removal, p. 555R-2

2.1 Introduction

2.2 Assessment of concrete structures for complete or

partial demolition

2.3 Types and degrees of removal

2.4 Types of concrete and effects on removal and reuse

2.5 Monitoring and safety considerations

Chapter 3 Removal methods, p. 555R-6

3.1 Introduction

3.2 Hand tools

3.3 Hand-operated power tools

3.4 Vehicle-mounted equipment

3.5 Explosive blasting

3.6 Drills and saws

3.7 Nonexplosive demolition agents

3.8 Mechanical splitters

3.9 Demolition of concrete structures by heat

3.10 Hydrodemolition (water-jet blasting)

Chapter 4 Surface removal, p. 555R-11

4.1 Introduction

4.2 Purpose of surface removal

4.3 Systems available for surface removal

4.4 Definition of final surface

4.5 Requirements for surface preparation

4.6 Concrete pavement surface removal

4.7 Influence of surface conditions on bond properties

Chapter 5 Production of concrete from recycled

concrete, p. 555R-18

5.1 Introduction

5.2 Aggregate production process

5.3 Aggregate quality

5.4 Effects of recycled aggregates on concrete properties

5.5 Mixture proportioning

5.6 Concrete production

Chapter 6 References, p. 555R-24

6.1 Referenced standards and reports

6.2 Cited references