Microcracking in Hardened Concrete 1. Definition and Significance: Microcracking: Formation of tiny cracks within hardened concrete. Importance: Affects durability, strength, and long-term performance of concrete structures. 2. Causes of Microcracking:
Stress-Strain Relation in Hardened Concrete 1. Introduction to Hardened Concrete: Hardened concrete refers to concrete that has gained sufficient strength and stiffness after setting and curing. 2. Stress-Strain Relationship:
Factors Affecting Strength of Hardened Concrete Water-Cement Ratio: Definition: This ratio is calculated by dividing the weight of water in the mix by the weight of cement. Impact: Lower water-cement ratios lead to higher strength because of reduced porosity and increased density. Curing Conditions:
Compressive Strength of Hardened Concrete Key Points and Concepts: Definition of Compressive Strength: Measure of the ability of a material, specifically concrete, to withstand loads tending to reduce size. Expressed in terms of force per unit area (e.g., MPa or psi).
Strength of Hardened Concrete Definition Strength of concrete refers to its ability to resist loads without failure and is a critical property in construction and structural engineering. Types of Concrete Strength
Hardened Concrete Key Concepts Hardened Concrete Definition: Concrete that has set and achieved its desired strength and form after curing for a specific period. Properties of Hardened Concrete:
Marsh Cone Test 1. Purpose The Marsh Cone Test measures the viscosity of a fluid, typically drilling mud or concrete slurry, to ensure it meets specific requirements. 2. Equipment Marsh Cone: A funnel-shaped device. Stand: To hold the Marsh Cone. Graduated Cylinder: To measure collected fluid. Stopwatch: To time fluid flow.
Influence of Temperature on Properties of Concrete Key Points & Concepts Introduction: Temperature significantly affects both the fresh and hardened properties of concrete. Understanding these effects is crucial for construction practices and ensuring the durability and strength of concrete structures. Effects on Fresh Concrete:
Maturity of Concrete 1. Definition and Importance: Maturity Concept: The maturity of concrete is a measure of the extent of curing, combining both the time and temperature to predict the development of its strength. Significance: It’s crucial for understanding when the concrete reaches sufficient strength for construction activities. 2. Factors Affecting Maturity: Time: The duration for which the…
Under Water Concreting Key Points and Concepts: Definition: Underwater concreting involves placing concrete under water to construct structures such as piers, bridges, and marine foundations. Challenges:
