Blended Cement

Blended Cement Definition: Blended cement is a type of cement mixed with supplementary cementitious materials (SCMs) such as fly ash, slag, silica fume, or natural pozzolans to enhance its performance and sustainability. Key Points: Types of SCMs used: Fly Ash: Byproduct from coal-fired power plants. Slag: Byproduct from steel manufacturing. Silica Fume: Byproduct from silicon metal…

Expansive Cement

Expansive Cement Definition: Expansive cement is a type of cement that expands slightly after setting. Key Characteristics: Volume Increase: Unlike regular cement, expansive cement expands after setting, which helps in counteracting shrinkage that normally occurs in concrete structures. Chemical Composition: Typically includes calcium sulfoaluminate, calcium sulfate, and other expansive agents. Types: Often classified into three…

Super-Sulphate Cement

Super-Sulphate Cement  Definition: A type of cement primarily used where sulfate resistance is required. Composition: Made up largely of blast furnace slag. Contains calcium sulphate, typically in the form of gypsum or anhydrite. A minor proportion of Portland cement clinker. Properties: High sulfate resistance making it suitable for environments with high sulphate concentrations. Low heat…

Hydrophobic Cement (IS: 8043 – 1978)

Hydrophobic Cement (IS: 8043 – 1978) Introduction: Hydrophobic cement is designed to resist moisture penetration. Standard specification for hydrophobic cement in India is IS: 8043 – 1978. Characteristics: Contains additives that form a water-repellent coating around cement particles. Reduces risk of deterioration under wet conditions. Ensures better workability in humid environments. Composition:

High Alumina Cement (IS: 6452 – 1989)

High Alumina Cement (IS: 6452 – 1989) Definition and Standard High Alumina Cement (HAC): A type of rapid-hardening cement with a high proportion of aluminum oxide. Standard: Indian Standard IS: 6452 – 1989 dictates the specifications and guidelines. Key Characteristics High Alumina Content: Minimum of 39% aluminum oxide in its composition. Rapid Hardening: Faster setting…