Cold Weather Concreting: 1st Edition (Hardback) book cover

Cold Weather Concreting

1st Edition

By B.A. Krylov

CRC Press

236 pages

Purchasing Options:$ = USD
Hardback: 9780849382871
pub: 1997-11-19
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Concreting in cold weather requires special knowledge and skills to ensure accelerated hardening and high quality in plain- and reinforced-concrete structures. Cold Weather Concreting familiarizes concrete specialists with the characteristic features of concrete in cold weather, including the effects of frost, methods for hardening in subzero temperatures, and other challenges in cold-weather concreting. Both practical techniques and their underlying theories are covered.

The book presents many methods for the thermal treatment of concrete by means of electric current--information previously available only in the Russian literature. It presents unique data in the form of diagrams, drawings, and tables, including a chart of the phase state of concretes of different strengths in the process of freezing at different temperatures, the variation of concrete strains in freezing and thawing, and a diagram of electric fields in concrete when electrodes are placed in front of stirrups.

Table of Contents

1. Winter Construction

Specific Features of Winter

Concreting in Winter Conditions

Problems of Winter Concreting

2. Effects of Frost on the Structure and Properties of Concrete

Modern Views on the Hardening of Concrete

The Phase State of Water in Concrete at Different Temperatures

The Mechanism of Deterioration of Concrete Due to Early Freezing

Precuring of Concrete Before Freezing

Effects of Early Freezing on Concrete Properties

Concrete in the Frozen State and its Basic Properties

3. Preparations for Concreting in Winter Conditions

4. Concretes Containing Antifreeze Admixtures

The Principle of the Method and its Theory

Selection and Assignment of Antifreeze Admixtures


5. Thermos Curing

The Principle and Application of the Thermos Method

Placement and Curing of Concrete in Structures Built on Permafrost Ground

Curing and Cooling of Concrete in Massive Structures

6. Electric Contact Heating of Concrete

The Principle and Application of the Method

Heaters for Electric Contact Heating

Heating Formworks Covered with Conductive Materials

Application of Electric Contact Heating of Concrete

7. Electrode Heating of Concrete

Electric Conductivity of Concrete

Processes in Concrete Caused by Electric Current Passing Through it

Electrodes for Electric Heating of Concrete

Processes at the Interface of Concrete and an Electrode

Electric and Thermal Fields in Electric Heating

External Mass Exchange in Electric Heating

Electrode Heating Procedures

8. Electric Preheating of Concrete Mixtures

General Considerations and the Principle of the Method

The Theoretical Background of the Accelerated Heating of Concrete Mixtures

Internal Heat Exchange During the Accelerated Electric Heating of Concrete

Changes in Plastic Properties of Concrete Caused by Accelerated Heating

Physical-Mechanical Properties of Concrete Subjected to Accelerated Heating

Equipment for Electric Preheating of Concrete Mixtures

Concreting Procedures with Preheated Concrete Mixtures

Preheating of Concrete Mixtures in Truck Mixers

9. Induction Heating of Concrete

The Principle and Application of the Method

Determining Basic Parameters of Heating

Induction Heating of Concrete in Framed Structures

10. Sealing Joints Between Precast Units and Between Precast and Cast-in-Place Members in Composite Construction

Specific Features of Joints Between Precast Concrete Units

Erection of Precast Concrete Units

Curing of Sealing Concrete in Joints

11. Curing of Cast-in-Place Concrete in Enclosures

The Principle of the Method and Types of Enclosures

Curing of Concrete in Enclosures

Air Exchange in Enclosures

Concreting in Enclosures

12. Some Problems of Economics of Winter Concreting

Appendix - Specific Power Values Required to Heat Concrete with Strip Electrodes Placed on One Side



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