ACI 207.4R 05 2005
$28.44
207.4R-05: Cooling and Insulating Systems for Mass Concrete (Reapproved 2012)
| Published By | Publication Date | Number of Pages |
| ACI | 2005 | 19 |
The need to control volume change induced primarily by temperature change in mass concrete often requires cooling and insulating systems. This report reviews precooling, postcooling, and insulating systems. A simplified method for computing the temperature of freshly mixed concrete cooled by various systems is also presented. Keywords: cement content; coarse aggregate; creep; formwork; heat of hydration; mass concrete; modulus of elasticity; precooling; postcooling; pozzolan; restraint; specific heat; strain; stress; temperature rise; tensile strength; thermal conductivity; thermal diffusivity; thermal expansion; thermal gradient; thermal shock.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | CONTENTS |
| 4 | CHAPTER 1— INTRODUCTION 1.1—Scope and objective 1.2—Historical background |
| 5 | 1.3—Types of structures and temperature controls 1.4—Construction practices for temperature control 1.5—Instrumentation CHAPTER 2— PRECOOLING SYSTEMS 2.1—General |
| 6 | 2.2—Heat exchange 2.2.1 Heat capacities 2.2.2 Computing the cooling requirement |
| 7 | 2.2.3 Methods of precooling concrete components 2.3—Batch water 2.3.1 Chilled batch water |
| 8 | 2.3.2 Using ice as batch water 2.4—Aggregate cooling 2.4.1 Schedule considerations 2.4.2 Cold weather aggregate processing |
| 9 | 2.4.3 Processing fine aggregate in chilled water 2.4.4 Sprinkling of coarse aggregate stockpiles 2.4.5 Immersion cooling of coarse aggregate 2.4.6 Chilled water spray 2.4.7 Vacuum cooling of aggregates |
| 10 | 2.4.8 Liquid nitrogen 2.5—Cementitious materials 2.6—Heat gains during concreting operations |
| 11 | 2.7—Refrigeration plant capacity 2.8—Placement area CHAPTER 3— POSTCOOLING SYSTEMS 3.1—General |
| 12 | 3.2—Embedded pipe 3.2.1 Materials 3.2.2 Spacing 3.2.3 Pipe loop layout 3.2.4 Repairs during placement 3.3—Refrigeration and pumping facilities 3.3.1 Pumping plant |
| 13 | 3.3.2 Refrigeration plant 3.3.3 Alternative water cooling practices 3.4—Operational flow control 3.4.1 Manifolds 3.4.2 Cooling rates 3.4.3 Temperature monitoring 3.5—Surface cooling 3.5.1 Forms 3.5.2 Curing water CHAPTER 4— SURFACE INSULATION 4.1—General |
| 14 | 4.1.1 Stress development 4.1.2 Strength development 4.1.3 Temperature gradients 4.2—Materials 4.2.1 Effect of sudden air temperature drop |
| 15 | 4.3—Horizontal surfaces 4.3.1 Insulation rating |
| 16 | 4.4—Formed surfaces 4.4.1 Integral form insulation 4.4.2 Form removal 4.5—Edges and corners 4.6—Heat absorption from light energy penetration 4.7—Geographical requirements CHAPTER 5— REFERENCES 5.1—Referenced standards and reports |
| 17 | 5.2—Cited references |
