The Alkali-Silica Reaction (ASR) is a chemical reaction that occurs in concrete between the alkaline pore solution and reactive silica found in certain aggregates, leading to the formation of a gel that expands upon absorbing water and causes cracking and deterioration of the concrete. This reaction is a significant concern in the durability and longevity of concrete structures, especially in environments with high moisture levels.

Alkali-Silica Reaction

A chemical reaction is a process where substances, known as reactants, are transformed into different substances, called products, through the breaking and forming of chemical bonds. This transformation involves changes in energy and is governed by the principles of conservation of mass and energy.

Chemical Reaction

Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement that hardens over time, widely used in construction due to its durability and versatility. Its properties can be modified by altering the mix proportions and using various additives to achieve desired strength, workability, and resistance to environmental factors.

Concrete

Alkaline Pore Solution

Reactive Silica

Certain aggregates

Formation of a gel

Absorbing water

Cracking refers to the process of breaking down complex organic molecules into simpler molecules, often used in the petrochemical industry to convert heavy hydrocarbons into lighter, more valuable products like gasoline and olefins. It involves the breaking of carbon-carbon bonds and can be achieved through methods such as thermal cracking, catalytic cracking, and hydrocracking, each with distinct mechanisms and applications.

Concepts

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