Determine
- Strength requirements, in MPa
- Water cement ratio, in decimal
- Coarse aggregate requirements (dry), in kg/m3
Extracted text: Design a concrete mix for the following conditions and constraints using absolute volume method. Design Criteria: Structure: Beams and reinforced walls exposed to freezing and Thawing Required Strength: 28 MPa Minimum form dimension: 0.3m Minimum space between rebars: 65mm Minimum cover over rebars: 50mm Standard deviation of compressive strength of 2. MPa is expected (more than 30 samples) Classification: air entrained, mild exposure, Use exact value from table, use 75mm slump Material classification: Cement: Cement type II Air entrainer: 5 ml/1% air/100kg cement Coarse aggregate: Nominal maximum size: 19mm Type: river source, gravel|with crushed particles Bulk oven dried specific gravity: 2.60 Absorption: 0.4% Oven-dried rodded density: 1600 kg/m³ Moisture content: 2% Fine aggregate: Type: natural sand Bulk oven dried specific gravity: 2.55 Absorption: 0.8% Fineness Modulus: 2.80 Moisture content: 3%