Types of Cement

CEMENT

Cement could be a normally used binding material within the construction. The cement is obtained by burning a combination of chalky (calcium) and clayey (clay) material at a really extreme temperature and {so} grinding the clinker so created to a fine powder.

Types of Cement

In addition to standard cement there square measure many types of cement. Necessary varieties square measure shortly explained below:

(i)    White Cement:

The cement once created free from coloring oxides of iron, atomic number 25 and chlorium results into white cement. Within the manufacture of this cement, the oil fuel is employed rather than coal for burning. White cement is employed for the ground finishes, plastering, decorative works etc. In swimming pools white cement is employed to interchange glazed tiles. it’s used for fixing marbles and glazed tiles.

(ii)   Colored Cement:

The cements of desired colors square measure created by intimately compounding pigments with standard cement. The chlorium chemical compound offers inexperienced color. Atomic number 27 turn out blue color. Iron chemical compound with completely different proportion turn out brown, red or yellow color.

Addition of atomic number 25 oxide offers black or brown colored cement. These cements square measure used for giving finishing touches to floors, walls, window sills, roofs etc.

(iii)  Quick Setting Cement:

Quick setting cement is created by reducing the proportion of mineral and adding atiny low quantity of metal sulfate throughout the manufacture of cement. Finer grinding additionally adds to fast setting property. This cement starts setting inside five minutes once adding water and becomes exhausting mass inside half-hour. This cement is employed to put concrete underneath static or slowly running water.

(iv) Rapid Hardening Cement:

This cement is created by increasing lime content and burning at extreme temperature whereas producing cement. Grinding to terribly fine is additionally necessary. The initial and final setting time of this cement is that the same as that of cement, it gains strength in time period. This property helps in earlier removal of type works and speed in construction activity.

(v)  Low Heat Cement:

In mass concrete works like construction of dams, heat created because of association of cement won’t get spread simply. This could produce to cracks. Thence in such constructions it’s desirable to use low heat cement. This cement contains low proportion (5%) of tricalcium chemical compound (C3A) and better proportion (46%) of dicalcium salt (C2S).

(vi) Pozzulana Cement:

Pozzulana could be a volcanic power found in European country. It is processed from shale’s and bound forms of clay additionally. During this cement pozzulana material is ten to thirty per cent. It will resist action of sulfate. It releases less heat throughout setting. It imparts higher degree of water tightness. Its durability is high however compressive strength is low. It’s used for mass concrete works. it’s additionally utilized in waste line works.

(vii) Expanding Cement:

This cement expands because it sets. This property is achieved by adding increasing medium like sulpho chemical compound and a stabilizing agent to standard cement. This can be used for filling the cracks in concrete structures.

(viii) High Alumina Cement:

It is factory-made by calcining a combination of lime and mineral. It’s a lot of immune to sulfate and acid attack. It develops virtually full strength inside twenty four hours of adding water. It’s used for underneath water works.

(ix) Blast Furnace Cement:

In the manufacture of atomic number 26, scum comes out as a waste material. By grinding clinkers of cement with concerning sixty to sixty five per cent of scum, this cement is created. The properties of this cement square measure a lot of or less same as standard cement, however it’s low-cost, since it utilize waste material. This cement is sturdy however it gains the strength slowly and thence wants longer amount of solidification.

(x)  Acid Resistant Cement:

This cement is created by adding acid resistant collective like quartz, quartzite, glass or glass. This cement has sensible resistance to action of acid and water. It’s normally utilized in the development of chemical factories.

(xi) Sulphate Resistant Cement:

By keeping the proportion of tricalcium chemical compound C3A below 5 per cent in standard cement this cement is created. It’s utilized in the development of structures that square measure probably to be broken by basic conditions. Samples of such structures square measure canals, culverts etc.

(xii) Fly Ash Blended Cement:

Fly ash could be a byproduct in thermal stations. The particles of ash square measure terribly minute and that they fly within the air, making pollution issues. Thermal power stations ought to pay ton of cash to arrest ash and dispose safely.

It is found that one in all the most effective thanks to dispose ash is to combine it with cement in controlled condition and derive a number of the beneficiary effects on cement. Now-a-days cement factories turn out the ash in their own thermal stations or borrow it from alternative thermal stations and additional method it to form it appropriate to mix with cement. Twenty to half-hour ash is employed for mixing.