229R-99
229R-99: Controlled Low-Strength Materials (CLSM) (Reapproved 2005)
1999, 15 pp.
$38.50

Controlled low-strength material (CLSM) is a self-compacted, cementitious material used primarily as a backfill place of compacted fill. Many terms are currently used to describe this material including flowable fill, unshrinkable fill, controlled density fill, flowable mortar, flowable fly ash, fly ash slurry, plastic soil-cement, soil-cement slurry, other various names. This report contains information on applications, material properties, mix proportioning, construction and quality-control procedures. This report's intent is to provide basic information on CLSM technology, with emphasis on CLSM material characteristics and advantages over conventional compacted fill.

Contents:
Chapter 1 - Introduction

Chapter 2 - Applications

2.1 General

2.2 Backfills

2.3 Structural fills

2.4 Insulating and isolation fills

2.5 Pavement bases

2.6 Conduit bedding

2.7 Erosion control

2.8 Void filling

2.9 Nuclear Facilities

2.10 Bridge Reclamation

Chapter 3 - Materials

3.1 General

3.2 Portland cement

3.3 Fly ash

3.4 Chemical admixtures

3.5 Water

3.6 Aggregates

3.7 Non-standard materials

Chapter 4 - Properties

4.1 Introduction

4.2 Plastic properties

4.3 In-service properties

Chapter 5 - Mix proportioning

Chapter 6 - Construction

6.1 General

6.2 Mixing

6.3 Transporting

6.4 Placing

Chapter 7 - Quality control

7.1 General

7.2 Consistency and unit weight

7.3 Strength tests

Chapter 8 - Low density CLSM using preformed foam,

8.1 General

8.2 Applications

8.3 Materials

8.4 Properties

8.5 Proportioning

8.6 Construction

Chapter 9 - References