Page 9 - Handbook of Thermal Analysis of Construction Materials

xx Contents

10 Non-Portland Rapid Setting Cements .............................. 403
1.0 INTRODUCTION .......................................................................... 403
2.0 CALCIUM ALUMINATE CEMENTS ......................................... 404
2.1 Basic Reactions .................................................................. 404
2.2 Thermal Analysis of Hydrated Calcium
Aluminate Cements ............................................................ 405
3.0 JET SET (REGULATED-SET) CEMENT .................................... 422
3.1 Hydration of 11CaO•7Al •CaF ....................................... 422
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4.0 MAGNESIUM OXYCHLORIDE AND MAGNESIUM
OXYSULFATE CEMENT SYSTEMS ......................................... 430
5.0 ZINC OXYCHLORIDE CEMENT................................................ 437
6.0 MAGNESIA-PHOSPHATE CEMENTS ....................................... 438
7.0 HYDROXYAPATITE ................................................................... 444
REFERENCES ......................................................................................... 446
11 Gypsum and Gypsum Products......................................... 449
1.0 INTRODUCTION .......................................................................... 449
2.0 DIFFERENTIAL THERMAL ANALYSIS (DTA) AND
DIFFERENTIAL SCANNING CALORIMETRY (DSC) ............. 450
3.0 THERMOGRAVIMETRIC ANALYSIS (TG) .............................. 454
4.0 DEHYDRATION OF GYPSUM ................................................... 455
5.0 SIMULTANEOUS TG-DTG-DTA................................................ 459
6.0 CONVERSION REACTIONS ....................................................... 462
6.1 Dihydrate to β-Anhydrite................................................... 462
6.2 Conversion of Soluble to Insoluble Anhydrite................... 467
7.0 CONTROLLED TRANSFORMATION RATE THERMAL
ANALYSIS (CRTA) ...................................................................... 467
7.1 CRTA and Kinetic Modeling ............................................. 473
8.0 A THREE STEP GYPSUM DEHYDRATION PROCESS ........... 477
9.0 INDUSTRIAL APPLICATIONS ................................................... 480
9.1 Portland Cement and Stucco .............................................. 480
9.2 Gypsum–Based Cements ................................................... 482
9.3 Sedimentary Rocks Containing Gypsum............................ 484
9.4 Quality Control of Commercial Plasters ............................ 484
9.5 White Coat Plaster ............................................................. 487
9.6 Expanding Cement ............................................................. 488
REFERENCES ......................................................................................... 488

12 Clay-Based Construction Products ................................... 491
1.0 INTRODUCTION .......................................................................... 491
2.0 THERMAL BEHAVIOR AND IDENTIFICATION OF
CLAYS AND ACCESSORY MINERALS .................................... 492
2.1 DTA of Clay Minerals ....................................................... 492
2.2 Other Thermal Methods ..................................................... 500
2.3 Accessory Minerals ............................................................ 505