Which of the following is a non-agro-based industry?




Food Processing

Answer: Cement

Cement falls under the non-agro-based industry. 

Cement is a binder, a chemical used in construction that binds things together by setting, hardening, and adhering to them. In most cases, cement is used to bond sand and gravel (aggregate), not on its own. Mortar for masonry is made from cement mixed with fine aggregate, and concrete is made from cement combined with sand and gravel. The second most utilized resource on the globe after water is concrete, which is the most often used substance in existence. 

Construction cement is typically inorganic, frequently based on lime or calcium silicate, and can be classified as either hydraulic or non-hydraulic depending on how well it sets in the presence of water (see hydraulic and non-hydraulic lime plaster).

The dry materials and water in hydraulic cements, such as Portland cement, react chemically to set and become adhesive. Mineral hydrates, which are formed as a result of the chemical reaction and are not particularly water soluble, are quite durable in water and resistant to chemical attack. This makes it possible to set in damp environments or under water and further shields the material against chemical attack. Ancient Romans discovered the chemical method for making hydraulic cement by using volcanic ash (pozzolana) with additional lime (calcium oxide).

Less frequently used non-hydraulic cement does not set in wet or submerged environments. Instead, it sets as it dries and interacts with atmospheric carbon dioxide. After setting, it is resistant to chemical attack.

The term opus caementicium, which was used in Ancient Rome to describe construction that resembled modern concrete and was constructed from crushed rock with burnt lime as a binder, is where the word “cement” first appeared. Cementum, cimentum, cäment, and cement are all names for the additives—volcanic ash and crushed brick—that were added to burnt lime to create a hydraulic binder. In contemporary society, organic polymers are occasionally utilized as concrete cements.

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