Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Grinding Cements with Calcined Clays

Description

This lecture covers the importance of grinding cement to increase reactivity by reducing size and increasing specific surface. It explains the particle size distribution for cement, lab and industrial grinding equipment, and the impact of fineness on different components. The lecture also discusses intergrinding multi-component cements, undergrinding of clinker, and the impact on the pore structure. It compares intergrinding and separate grinding methods, highlighting their advantages and disadvantages. Additionally, it explores how LC³ can be produced at the concrete stage and its applications in masonry and high-strength concrete.

In MOOC

Cement Chemistry and Sustainable Cementitious Materials

Official source

Ontological neighbourhood

Chemical engineering

Materials science: Concrete

Related concepts (19)

Cement clinker

Cement clinker is a solid material produced in the manufacture of Portland cement as an intermediary product. Clinker occurs as lumps or nodules, usually to in diameter. It is produced by sintering (fusing together without melting to the point of liquefaction) limestone and aluminosilicate materials such as clay during the cement kiln stage. The Portland clinker essentially consists of four minerals: two calcium silicates, alite (Ca3SiO5) and belite (Ca2SiO4), along with tricalcium aluminate (Ca3Al2O6) and calcium aluminoferrite (Ca2(Al,Fe)2O5).

Cement

A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel (aggregate) together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. Concrete is the most widely used material in existence and is behind only water as the planet's most-consumed resource.

Concrete

Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that is easily poured and molded into shape.

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Prestressed concrete

Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the concrete and is done to improve the performance of the concrete in service. Tendons may consist of single wires, multi-wire strands or threaded bars that are most commonly made from high-tensile steels, carbon fiber or aramid fiber.

Related lectures (41)

Concrete Durability: Corrosion and Repair

Discusses concrete corrosion, freeze-thaw impact, alkali reaction, and acid attacks.

Grinding Cements with Calcined Clays: How to Make LC3 MOOC: Cement Chemistry and Sustainable Cementitious Materials

Explores the process of grinding cements with calcined clays to produce LC3.

Silica Fume and Calcined Clay in Concrete

Explores the use of silica fume and calcined clay in concrete mixtures.

Cracking and Sorption MOOC: Sorption and transport in cementitious materials

Explores the formation and impact of microcracks in concrete structures.

Concrete Durability: Carbonation and Chlorides