Introductory technical guidance for civil and structural engineers interested in chemical admixtures for concrete construction. Here is what is discussed: 1. GENERAL 2. AIR-ENTRAINING ADMIXTURES 3. ACCELERATING ADMIXTURE 4. RETARDING ADMIXTURES 5. WATER-REDUCING ADMIXTURES 6. HIGH-RANGE WATER-REDUCING ADMIXTURES ("SUPERPLASTICIZERS"). 7. ANTIWASHOUT ADMIXTURES 8. EXTENDED SET-CONTROL ADMIXTURES 9. ANTIFREEZE ADMIXTURES.