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پاورپوینت بتن مقاومتی (pptx) 28 اسلاید

دسته بندی : پاورپوینت

نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )

تعداد اسلاید: 28 اسلاید

قسمتی از متن PowerPoint (.pptx) :

Specialty Concrete - High End Value Materials High-Value Concrete High-Value Concrete All concrete is high value! Cost of material (small) Cost of placement (significant) Cost of Replacement (HIGH) High-Value Concrete High value generally associated with High-Performance What is High-Performance? High-Early Strength Concrete High-Strength Concrete High-Durability Concrete Self-Consolidating Concrete Reactive Powder Concrete High-Value Concrete High-Value Concrete Characteristics of High-Performance Concretes High early strength High strength High modulus of elasticity High abrasion resistance High durability and long life in severe environments Low permeability and diffusion Resistance to chemical attack High-Value Concrete Characteristics of High-Performance Concretes High resistance to frost and deicer scaling damage Toughness and impact resistance Volume stability Ease of placement Compaction without segregation Inhibition of bacterial and mold growth High-Value Concrete Materials Used in High- Performance Concrete High-Value Concrete Materials Used in High- Performance Concrete Optimally graded aggr. Durability High-Value Concrete Selected Properties of High- Performance Concrete Low Absorption ASTM C 642 2% to 5% High Mod.of Elast. ASTM C 469 More than 40 GPa High-Value Concrete High-Early-Strength Concrete High-early compressive strength ASTM C 39 (AASHTO T 22) 20 to 28 MPa (3000 to 4000 psi) at 3 to 12 hours or 1 to 3 days High-early flexural strength ASTM C 78 (AASHTO T 97) 2 to 4 MPa (300 to 600 psi) at 3 to 12 hours or 1 to 3 days