ACI-306R-10 Guide to Cold Weather Concreting

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The objectives of cold weather concreting practices are to prevent damage to concrete due to freezing at early ages, ensure that the concrete develops the required strength for safe removal of forms, maintain curing conditions that foster normal strength development, limit rapid temperature changes, and provide protection consistent with the intended serviceability of the structure.

Concrete placed during cold weather will develop sufficient strength and durability to satisfy intended service requirements when it is properly produced, placed, and protected. This guide provides information for the contractor to select the best methods to satisfy the minimum cold weather concreting requirements.

ACI-306R-10 Guide to Cold Weather Concreting discusses: concrete temperature during mixing and placing, temperature loss during delivery, preparation for cold weather concreting, protection requirements for concrete that does not require construction supports, estimating strength development, methods of protection, curing requirements, and admixtures for accelerating setting and strength gain including antifreeze admixtures. The materials, processes, quality control measures, and inspections described in this document should be tested, monitored, or performed as applicable only by individuals holding the appropriate ACI Certifications or equivalent.

OVERVIEW

Chapter 1—Introduction

Chapter 2—Notation and definitions

Chapter 3—Objectives, principles, and economy

Chapter 4—General requirements

Chapter 5—Temperature of concrete as mixed and placed, and heating of materials

Chapter 6—Preparation before concreting

Chapter 7—Protection against freezing and protection for concrete not requiring construction supports

Chapter 8—Protection for structural concrete requiring construction supports

Chapter 9—Equipment, materials, and methods of temperature protection

Chapter 10—Curing requirements and methods

Chapter 11—Acceleration of setting and strength development