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1. Winter Construction --
1.1. Specific features of winter -- 1.2. Concreting in winter conditions -- 1.3. Problems of winter concreting -- 2. Effects of Frost on the Structure and Properties of Concrete -- 2.1. Modern views on the hardening of concrete -- 2.2. The phase state of water in concrete at different temperatures -- 2.3. The mechanism of deterioration of concrete due to early freezing -- 2.4. Precuring of concrete before freezing -- 2.5. Effects of early freezing on concrete properties -- 2.6. Concrete in the frozen state and its basic properties -- 3. Preparations for Concreting in Winter Conditions -- 4. Concretes Containing Antifreeze Admixtures -- 4.1. The principle of the method and its theory -- 4.2. Selection and assignment of antifreeze admixtures -- 4.3. Procedures -- 5. Thermos Curing -- 5.1. The principle and application of the thermos method -- 5.2. Placement and curing of concrete in structures built on permafrost ground -- 5.3. Curing and cooling of concrete in massive structures -- 6. Electric Contact Heating of Concrete -- 6.1. The principle and application of the method -- 6.2. Heaters for electric contact heating -- 6.3. Heating form works covered with a conductive materials -- 6.4. Application of electric contact heating of concrete -- 7. Electrode Heating of Concrete -- 7.1. Electric conductivity of concrete -- 7.2. Processes in concrete caused by electric current passing through it -- 7.3. Electrodes for electric heating of concrete -- 7.4. Processes at the interface of concrete and an electrode -- 7.5. Electric and thermal fields in electric heating -- 7.6. External mass exchange in electric heating -- 7.7. Electrode heating procedures -- 8. Electric Preheating of Concrete Mixtures -- 8.1. General considerations and the principle of the method -- 8.2. The theoretical background of the accelerated heating of concrete mixtures -- 8.3 Internal heat exchange during the accelerated electric heating of concrete -- 8.4. Changes in plastic properties of concrete caused by accelerated heating -- 8.5. Physico-mechanical properties of concrete subjected to accelerated heating -- 8.6. Equipment for electric preheating of concrete mixtures -- 8.7. Concreting procedures with preheated concrete mixtures -- 8.8. Preheating of concrete mixtures in truck mixers -- 9. Induction Heating of Concrete -- 9.1. The principle and application of the method -- 9.2. Determining basic parameters of heating -- 9.3. Induction heating of concrete in framed structures -- 10. Sealing Joints between Precast Units and between Precast and Cast-In-Place Members in Composite Construction -- 10.1. Specific features of joints between precast concrete units -- 10.2. Erection of precast concrete units -- 10.3. Curing of sealing concrete in joints -- 11. Curing of Cast-In-Place Concrete in Enclosures -- 11.1. The principle of the method and types of enclosures -- 11.2. Curing of concrete in enclosures -- 11.3. Air exchange in enclosures -- 11.4. Concreting in enclosures -- 12. Some Problems of Economics of Winter Concreting -- Appendices - Specific power values required to heat concrete -- References -- Index. |