Building Construction Works for different Exposure Condition скачать в хорошем качестве

Building Construction Works for different Exposure Condition

Telegram-https://t.me/ranveerkushwahaofficial Instagram-https://www.instagram.com/ranveer_nwd... 🌍 Exposure Conditions of Concrete (IS 456) Concrete durability depends mainly on minimum cement content, maximum water–cement ratio, and concrete grade, not just strength. ✅ 1. Mild Exposure Description: Concrete protected from weather and aggressive conditions. Not located in coastal areas. Examples: Indoor slabs, beams inside buildings. ✔ PCC (Plain Cement Concrete) Minimum cement: 220 kg/m³ Max W/C ratio: 0.60 Minimum grade: Not specified ✔ RCC (Reinforced Cement Concrete) Minimum cement: 300 kg/m³ Max W/C ratio: 0.55 Minimum grade: M20 👉 Typical nominal cover (general guidance): about 20–25 mm depending on bar size and grade. ✅ 2. Moderate Exposure Description: Concrete exposed to rain or condensation. Buried in non-aggressive soil or continuously under water. Examples: Foundations, water tanks, external members. ✔ PCC Minimum cement: 240 kg/m³ Max W/C ratio: 0.60 Minimum grade: M15 ✔ RCC Minimum cement: 300 kg/m³ Max W/C ratio: 0.50 Minimum grade: M25 👉 Typical nominal cover: around 30–35 mm. ✅ 3. Severe Exposure Description: Alternate wetting and drying. Coastal environment or severe rain. Completely immersed in seawater. Examples: Marine structures, bridge parts, heavy rainfall zones. ✔ PCC Minimum cement: 250 kg/m³ Max W/C ratio: 0.50 Minimum grade: M20 ✔ RCC Minimum cement: 320 kg/m³ Max W/C ratio: 0.45 Minimum grade: M30 👉 Typical nominal cover: about 40 mm or more for durability. ⚙️ Quick Comparison Table Exposure PCC Cement (kg/m³) PCC W/C RCC Cement (kg/m³) RCC W/C Mild 220 0.60 300 0.55 Moderate 240 0.60 300 0.50 Severe 250 0.50 320 0.45 (Source: IS 456 durability tables) ⭐ Important Site Insight Lower water–cement ratio → denser concrete → better resistance to corrosion and chemical attack. Higher exposure severity always demands more cement and lower W/C ratio for durability. #CivilEngineering #ConcreteTechnology #IS456 #RCC #PCC #WaterCementRatio #ExposureCondition #ConcreteDesign #BuildingConstruction #SiteEngineering #BPSC_AE #SSCJE #UPPSC #JEExam #AEExam #EngineeringExams #CivilEngineerLife #TechnicalEducation #CivilEngineeringStudents #ConceptLearning #EngineeringBasics #StudyCivil #SmartStudy #EngineeringNotes #LearnCivil #CivilTips #ConstructionKnowledge #EngineerMind #CareerInCivil