What Is Concrete?

Concrete is a construction material obtained by mixing cement, fine aggregate (sand) coarse aggregates (gravel, stone chips, rock, etc), and water in certain proportions. All these ingredients when properly mixed, cement, and water start a reaction to bind themselves produce a plastic mass which hardens over time. This plastic and hardened mass are known as concrete. The developments in technology have led to the invention of new types of concrete with specific uses. In this article, 25 types of concrete have been discussed.

The properties of concrete depend upon the quantity and proportions of the ingredients used in the mix. However, the properties can also be majorly modified based on the various type of cement used for the mix. Concrete is very strong in compression but little in tension. Fresh concrete can be poured into any suitable forms or moulds to get desired shape and size. Concrete is widely used in all types of construction work like building, bridges, dams, roads, flyovers, etc.

Composition Of Concrete:

  1. Binding materials,
  2. Aggregates,
  3. Water,
  4. Admixtures.

a. Binding Materials:

The use of lime in concrete has gone. Today cement is the only binding material used in concrete. When water is added with all the concrete ingredients a reaction between cement and water takes place and concrete is formed.

b. Aggregates:

Aggregates are used as filer materials. They do not undergo any chemical change, they only provide mass volume to the concrete and reduce shrinkage effects.

c. Water:

Water is required to complete the chemical reaction with cement. Water plays a vital role in workability of concrete.

d. Admixtures:

Admixture is an optional material added during concrete mixing to enhance the properties and performance of fresh concrete. There are 4 types of admixtures – Accelerating admixture, Retarding admixture, Air entraining admixture, and Water reducing admixture.

Types Of Concrete:

There are 25 different types of concrete listed below.

1. Plain cement concrete
2. Reinforced cement concrete
3. Fibre reinforced concrete
4. Glass reinforced concrete
5. Ferro concrete
6. Ready mix concrete
7. Precast concrete
8. Prestressed concrete
9. Light weight concrete
10. Polymer concrete
11. High density concrete
12. High performance concrete
13. High strength concrete
14. Air entrained concrete
15. Self-compacting concrete
16. Shotcrete
17. Guniting concrete
18. Pumped concrete
19. Pervious concrete
20. Smart concrete
21. Stamped concrete
22. Limecrete
23. Asphalt concrete
24. Bacterial concrete
25. Smog eating concrete

1. Plain Cement Concrete (PCC):

Plain Cement Concrete is a basic concrete mix consisting of cement, fine aggregates, coarse aggregates, admixtures (optional), and water. PCC is very strong in compression. But, due to the absence of reinforcements like steel, it is very weak in tension. The general mix design ratio of PCC is 1:2:4 and 1:3:6. It is commonly used in the foundation of a building. After the hard strata have been reached, a layer of sand is laid followed by Plain Cement Concrete. Above the Plain cement concrete, the reinforcement cage of the footing is placed.

plain cement concrete

Advantages Of Plain Cement Concrete:

i) Plain cement concrete is economical than other types of concrete.

ii) PCC is very strong in compression.

iii) Simple construction

iv) Free from corrosion due to the absence of steel.

v) In the foundation, it acts as a cover and prevents the intrusion of water or reactive soils.

vi) The PCC acts as a sturdy ground for placing the cover blocks for the footing

vii) High resistance to fire

viii) Minimum weathering effects.

ix) Less maintenance cost which can be ignored.

Disadvantages Of Plain Cement Concrete:

i) Plain Cement Concrete is weak in tension.

ii) It is very brittle.

iii) Low in toughness, flexural rigidity and yielding.

iv) High temperature and shrinkage stresses


PCC is used in

  • Foundations,
  • Grade slabs,
  • Concrete blocks,
  • Verandas,
  • Open Parking.

2. Reinforced Cement Concrete (RCC)

Reinforced cement concrete is a composite material made up of cement, fine aggregates, coarse aggregates, admixtures, and steel reinforcements. It is simply Plain cement concrete with the presence of steel in it. All the limitations in the Plain cement concrete can be overcome by reinforced cement concrete. Of all metals, steel is the most suitable reinforcement material because of the near same thermal coefficient of expansion. The thermal coefficient of concrete is 14.5 /˚C and that of steel is 12 /˚C. Due to this property of the steel, it is more compatible with concrete than other metals.

reinforced cement concrete

Advantages Of RCC:

i) Simple construction.

ii) Strong in tension and compression.

iii) Increased fire resistance when compared to steel structures.

iv) Ductile reinforcements can withstand the effects of earthquakes.

v) Depth of the section can be reduced.

vi) Steel can be moulded into any shapes.

vii) High in toughness, flexural rigidity, ductility and yield strength than PCC.

viii) Low temperature stresses.

Disadvantages Of RCC:

Steel is very costly.

ii) The dead weight of RCC is higher than that of steel or timber structures.

iii) Bar bending requires skilled labours and space.

iv) The environmental conditions may aggravate the vulnerability of the steel to corrosion.

v)Needs costly formworks for casting the RCC to hold the reinforcements in place.

vi) Low resistance to shrinkage stresses.


  • Slabs, beams, columns, and foundations of buildings
  • Dams
  • Pavements
  • Bridges
  • Water tanks
  • Retaining walls
  • Underwater constructions
  • Concrete sewers and pipes
  • Canals.
  • Chimneys.
  • Power plants.

3. Fibre Reinforced Concrete (FRC):

Fibre reinforced concrete is a composite material made up of cement, water, aggregates and flat or rounded fibres. Various types of fibres like steel fibres, Polypropylene fibres, glass fibres, asbestos fibres, carbon fibres and organic fibres are widely used to reduce permeability, bleeding and the formation of minor cracks.

Fibres are added in the ratio of 0.1% to 3% of the total volume of the concrete. The dimensions of the fibres are represented using the term “aspect ratio” which is the ratio of the length to diameter of the fibre. The aspect ratio of the fibre is generally 30 to 150. The orientation of the fibres is mostly random but they can be arranged in parallel or perpendicular fashion depending on the design criteria.

fibre reinforced concrete

Advantages Of FRC:

i) Reduction in the formation of micro-cracks.

ii) Reduced bleeding.

iii) Reduced permeability

iv) Increased durability.

v) High flexural rigidity.

vi) Plastic shrinkage can be reduced.

vii) Reduces deflection.

viii) High resistance to impact and fatigue stresses and thermal shocks.

ix) Better performance of the concrete to varying environmental conditions.

x) High tensile strength.

xi) Due to the discontinuous nature of the steel fibres, the corrosion doesn’t not spread.

Disadvantages Of FRC:

i) The fibres are costly.

ii) Proper care should be taken to ensure the uniform quantity of fibres in every batch of concrete. Small changes may lead to large repercussions.

iii) The distribution of the fibres in a batch should be uniform. The fibres tend to form lumps and mot mix well.

iv) The size of the coarse aggregate is restricted to 10 mm thus increasing the surface area of the aggregate exposed to the interfacial transition zone.

v) For high volumes of fibres, mixing becomes tedious.

vi) It requires skilled labours and proper planning.


  • Dams, spillways, basins
  • Pavements in airports and highways
  • Bridge decks
  • Thin shelled structures
  • Foundation
  • In refractories
  • Industrial floors
  • Machine foundation

4. Glass Fibre Reinforced Concrete (GFRC)

Glass Fibre reinforced concrete is a composite material made up of cement, water, aggregates, and glass fibres. The glass fibres have high tensile strength of nearly 4080 N/mm2. The glass fibres also increase the durability of the structure due to its alkaline nature. However, the glass fibres are one of the cheapest reinforcements available thus making the structure more economical. The properties, applications, advantages and disadvantages of glass fibre reinforced concrete are similar to that of fibre reinforced concrete that is discussed above.

5. Ferro Concrete:

Ferro concrete also called Ferrocement is a type reinforced concrete structure made up of cement, fine aggregates, chicken wire mesh, and water. First, a tightly packed wire mesh is installed over which a rich cement mortar mix of ratios 1:2 or 1:3 is applied to both sides of the wire mesh. The diameter of the holes in the wire mesh is restricted to 1 mm. The application of the mortar to the wire mesh can be through hand plastering, centrifuging, machinal, or guniting.

ferro concrete

Advantages Of Ferro Concrete:

i) Easy mouldability,

ii) Less formation of cracks,

iii) Less self-weight of the structure,

iv) Low cost of materials,

v) Ease in repair works.

Disadvantages Of Ferro Concrete:

i) The manual application of mortar is an intense process and thus increases the labour costs.

ii) Risk of corrosion.

iii) Risk of getting punctured when hit with a pointed object


  • Slabs
  • Manhole covers
  • Showcases
  • Roof shells
  • Water tanks and septic tanks
  • Gobar gas units
  • Stone benches
  • Concrete pipes
  • Industrial structures
  • Bridge decks

6. Ready Mix Concrete

Ready mix concrete is a factory-made concrete made of cement, aggregates, water, and admixtures and transported to the site. The ready-mix concrete is preferred when there is less space for storing and mixing the construction materials. The plant made concrete is loaded into special delivery trucks called the transit mixers which have the provisions to constantly rotate and keep the concrete in motion and thus prevent setting.

Usually, retarders are added to the concrete mix to slow down the setting process to give allowance to the transportation and placing time of the concrete. Quality check is performed both in the factory and at the site. The difference on the slump value of the both should not differ by more than 25 mm or 1/8th of the specific value whichever is greater.

ready mix concrete

Advantages Of Ready Mix Concrete:

i) High quality control.

ii) Steady supply of concrete is possible without interruption.

iii) Fast construction.

iv) Less wastage of materials.

v) Human errors are minimised.

vi) Does not require space for storage and mixing.

Disadvantages Of Ready Mix Concrete:

i) The workability of the concrete may be affected if there is delay due to traffic.

ii) It is expensive than normal concrete.


  • Normally used for monolithic concreting of the roof slabs and beams
  • Runways
  • Pavements
  • Lining of tunnels
  • Dams and hydraulic structures

7. Precast Concrete

Precast concrete structures are cast, cured, transported to the site and erected using cranes. The precast structures are manufactured at the sites using moulds with reinforcement cages present inside them. They may or may not be prestressed based on requirements. The dried concrete members are cured in controlled conditions to achieve desire strength. Special hooks are provided in the members to lift them. The design of precast members takes into account the handling and erection stresses that may arise during the construction process.

Advantages Of Precast Concrete:

i) High quality control since it is manufacture in a factory.

ii) Fast construction.

iii) No need for formworks.

iv) Less wastage of materials.

v) If the same mould is used, it becomes very economical.

vi) Human errors are minimised.

vii) High quality.

viii) Uniform quality of the building can be achieved.

ix) Does not depend on the weather conditions.

x) They can be dismantled and reassembled wherever possible.

xi) Versatile.

Disadvantages Of Precast Concrete:

i) The design of joints is complex.

ii) Considerations have to be made for handling and erection stresses.

iii) Special equipment like cranes are required for erection.

iv) It is expensive than normal concrete for small projects.

v) The panels may have to be cut to fit inside the vehicles for transport.


  • Precast slabs, beams, columns, wall panels can be used for conventional buildings
  • Bridge decks
  • Parking
  • High rise buildings
  • Retaining walls
  • Sound walls
  • Culverts

8. Prestressed Concrete

Prestressed concrete structures are made up of high strength concrete and high strength steel tendons in addition to the normal reinforcements. When the tendons are prestressed, the stress from the tendon is transferred to the concrete thus improving the deflection resistance, load capacity and overall structural performance of the member. Prestressed concrete structures are commonly used in the construction of prefabricated buildings.

prestressed concrete
Presstressed Concrete

A concrete member can be prestressed in two ways:

1. Pre tensioning
2. Post tensioning

Pretensioned prestressed structures are prestressed before the concrete hardens. First, the high strength tendons are pulled and the concrete is casted in the mould with the normal reinforcement and the pulled tendons. After the concrete has sufficiently hardened, the prestress tendons are spliced and the stress is transferred to the member. Here the stress transfer is through the bond strength between the concrete and steel. This is called as pre-tensioning.

In Post tensioned prestressed structures, the concrete member is first cast with the conventional reinforcement and special ducts. After hardening, high strength steel tendons are introduced into the ducts and are prestressed and anchored to the ends of the member. Here the stress transfer is through the bond strength and anchorage blocks of the members This is called post-tensioning. The post-tensioned slabs are mostly precast and are of various shapes. Post-tensioned slabs are widely used because of their ability to be cast in a shorter period of time.

Advantages Of Prestressed Concrete:

i) Lighter sections can be achieved due to the use of high strength materials.

ii) Longer spans.

iii) Reduced thickness in the structural member cuts the footing size.

iv) High load carrying capacity.

v)Faster construction.

vi) Less deflection and cracking

vii) Economical for long spans.

Disadvantages Of Prestressed Concrete:

i) Uneconomical for small projects.

ii) Connections must be sealed properly.

iii) Increased risk of corrosion.

iv) Bursting forces may be high.


  • Bridge decks
  • Parking
  • High rise buildings
  • Retaining walls
  • Sound walls
  • Culverts

9. Light Weight Concrete

Light weight concrete is a special type of concrete used to reduce the self-weight of the structure. The reduction in self-weight can be achieved by any of the following methods

a. Light Weight Aggregate Concrete:

Using light weight aggregates like silica sand, pumice, saw dust, scoria, volcanic cinder blocks, volcanic slag, tuff, crushed stone and synthetic aggregates like coke breeze, foamed slag, bloated clay, expanded perlite, thermocol beads, broken bricks etc.

b. Aerated Concrete:

The concrete can be made light by increasing the air density inside to concrete from 300 kg/cu.m to 800 kg/cu.m. The air can be introduced by chemical reactions, using foam or chemicals like aluminium powder, hydrogen peroxide and zinc compounds.

c. No fines Concrete:

In this concrete, the self-weight is reduced by removing the fine aggregates in the concrete. No fines concrete is made up of cement, coarse aggregate, and water. The Aggregate to cement ratio is set between 6:1 and 10:1.

Advantages Of Light Weight Concrete:

i) Reduced self-weight reduces the cost of footing and columns.

ii)Increased fire and corrosion protection.

iii) Low thermal conductivity.

Disadvantages Of Light Weight Concrete:

i) There may be compatibility issues between the binders and the light weight aggregates.

light weight concrete


  • In precast elements
  • Bridge decks
  • Long span structures
  • Filling for floor and roof slabs
  • Partition walls

10. Polymer Concrete

Polymer concrete is a special type of concrete that will reduce the pores in the member through the incorporation of polymers into it. The porosity in the concrete can be due to the presence of air voids, water voids or voids in the gel structure.

polymer concrete

There are four types of polymer concrete namely:

a. Polymer Impregnated Concrete:

In this type, the conventional concrete is allowed to cure and harden. After this, the monomers such as styrene, acrylonitrile, thermo plastics are injected into the voids under high temperature and the voids are pack through polymerisation.

b. Polymer Cement Concrete:

In this type of concrete, the monomers / polymers such as polyester styrene, epoxy styrene etc., are added to the concrete mix during the mixing process itself.

c. Polymer Concrete:

In this type of concrete, instead of cement polymers are used as binders to reduce the porosity of the member. Polymers, aggregates, water and coupling agents that improve the bond strength like silane are mixed together to form the polymer concrete. Due to the absence of cement, this concrete is not strong enough.

d. Partially impregnates and surface coated polymer concrete:

Just like the polymer impregnated concrete, the members are allowed to dry and then dipped in high temperature monomer solutions to pack the voids through polymerisation.


  • Chemical industries
  • Underwater constructions
  • Marine works
  • Desalination plants
  • Sewage works

11. High Density Concrete

High density concrete is a special type of concrete made up of cement, water, fine aggregate, coarse aggregate, and high-density aggregate. The density of normal Plain cement concrete is 2400 kg/m3. For high density concrete the density ranges from 3360 kg/m3 to 3840 kg/m3. The density of the concrete is increased by increasing the cement content, reducing voids, and using high density aggregates like barite, magnetite, serpentine, limonite, goethite, etc.,

Advantages Of High Density Concrete:

i) High strength.

ii) Less porosity.

iii) High density can trap the radiation from coming out.

Disadvantages Of High Density Concrete:

i) High shrinkage.

ii) High self-weight thus heavier foundations and columns.

iii) Risk of segregation is high due to the increased weight of the aggregates.


  • Power plants
  • Coal plants
  • Research institutes

12. High Performance Concrete

High performance concrete is a special type of concrete made using cement, water, fine aggregate, coarse aggregate, mineral admixtures, and superplasticizers. The mix design ratio of the high-performance concrete is designed in such a way that it performs well both structurally and in durability criteria.

The performance of the concrete can be improved by making the three phases on the concrete – the paste phase, transition phase, and aggregate phase stronger. It can be done by increasing the cement content, restricting the water-cement ratio to not more than 0.3, using super plasticizers, mineral admixtures, and non-porous aggregates.

Advantages Of High Performance Concrete:

i) High strength.

ii) High durability.

iii) Less porosity.

Disadvantages Of High Performance Concrete:

i) High shrinkage.

ii) High self-weight thus heavier foundations and columns.

iii) The risk of segregation is high due to the increased weight of the aggregates.


  • Power plants
  • Chemical industries
  • Coal plant
  • Research Institutes

13. High Strength Concrete

High strength concrete is a special type of concrete that is made up of cement, water, fine aggregate, coarse aggregate, mineral admixtures and super plasticisers. Mineral admixtures like fly ash, ground granulated blast furnace slag, silica fume, rice husk ash have high specific surface area which plays a major role in increasing the strength. High strength concrete has a compressive strength of at least 70 MPa.

Advantages Of High Strength Concrete:

High strength

ii) High durability.

ii) Lighter sections and therefore lower costs .

iii) High flexural rigidity

iv) Less creep and deflection.

v) Less porosity.

Disadvantages Of High Strength Concrete:

i) High shrinkage.


High strength concrete is used in the precast industry. The concrete has to be strong enough to withstand the huge amount of prestress that will be transferred through the process.

14. Air Entrained Concrete

Air entrained concrete is a special type of concrete used made using cement, water, aggregates, and air entraining agents. The air entraining concrete can also be made using air entraining cement. The need for air entraining agents is prominent in cold weather regions that are vulnerable to freeze thaw cycles.

The liquid water penetrating into the cement structure under freezing temperatures will turn into solid ice. The volume occupied by the solid ice is greater than that of the liquid water thus increasing the internal pressure. As a result, cracks will be formed to release the pressure. This is called as the freeze-thaw cycle. This can be avoided by using air entraining agents like wood resins, hydrogen peroxide, aluminium powder, sulphonic acid, etc.,

These air entraining agents will form artificial air pockets inside the mix. These artificial air pockets produced by the sir entraining agents can make up to the extra space needed by the formation of ice. Air entraining admixtures can also be added to ordinary cement to achieve the same results. This increases the durability of the structure but obviously the air pockets will reduce the strength of the concrete.

Advantages Of Air Entrained Concrete:

i) High resistance to freeze thaw cycles, chemical attacks etc.

ii) High durability.

iii) Increases workability.

iv) Reduced segregation, bleeding and laitance.

v) High resistance to sulphate attack.

Disadvantages Of Air Entrained Concrete:

i) Low strength.

ii) Low flexural rigidity.

iii) Low density.


• In cold-weather regions where the freeze-thaw cycle is common.
• In sulphate rich soils and water.

15. Self-compacting Concrete (SCC)

Self-compacting concrete is a special type of concrete made up of cement, fine aggregates, coarse aggregates, chemical admixtures to improve the workability, flowability, and rheology and mineral admixtures. SCC is also known as zero slump concrete. It has high workability and does not require any extra compaction. It is used in congested reinforcements where it is quite complicated to achieve full compaction. The flowability of the concrete can be achieved using viscosity modifying agents like sikaplast, retarders, air-entraining agents, very fine mineral admixtures, and superplasticizers.

self compacting concrete


  • In congested reinforcements like beam-column junctions.
  • In places of heavy reinforcements.
  • Places where compaction is not possible.
  • Deep beams.

16. Shotcrete

Shotcrete is a special type of sprayed concreting where mortar or small aggregate concrete is sprayed at high velocities using compressed air to the place of interest. In shotcrete, a pre mixed wet mortar or concrete mix is sprayed through a nozzle.


Advantages Of Shotcrete:

i) No need for skilled labours.

ii) Faster than gunite.

iii) Less monitoring.

iv) Easy to add any admixtures.

Disadvantages Of Shotcrete:

i) Clogging could disrupt the process and may even become dangerous to the surrounding.

ii) Unskilled workers may add extra water for easing the spraying process.

iii) Once started with the process, stopping will create weak joints in the mortar or concrete.


  • Repair works
  • Slope stabilization
  • Marine structures
  • Tunnel construction
  • Underground excavations
  • Swimming pools
  • Domes
  • Retaining walls
  • Mining

17. Guniting Concrete

Guniting is very similar to shotcrete but using a dry mix. It is a method of spraying concrete on surfaces using compressed air. Unlike shotcrete, guniting uses a dry mix which will be uniformly mixed with water near to the nozzle and discharged to the receiving surface. This process provides more bond strength than shotcrete.

Advantages Of Guniting Concrete:

i) Increased bond strength.

ii) The process can be stopped at any point.

iii) Economical.

iv) Easy to use and operate.


i) Air entraining agents cannot be added.

ii) The process is slower than shotcrete.

iii) Skilled labours are needed.

iv) Clogging may occur.


  • Repair works
  • Slope stabilization
  • Marine structures
  • Tunnel construction
  • Underground excavations
  • Swimming pools
  • Domes
  • Retaining walls
  • Mining

18. Pumped Concrete

Pumped concrete is a special type of concrete that is suitable for pumping. Admixtures are added to improve the workability, flowability, and pumpability of the concrete.

Advantages Of Pumped Concrete:

i) Before the pumping of concrete was in practice, concrete was carried by hoppers that were lifted using cranes to convey them to the desired location. Because of pumped concrete, big projects can be completed in lesser time.

ii) The double handling of materials can be avoided in pumping of concrete.

iii) The quality of the concrete is high because sufficient care has to be taken during the designing of the mix proportions of the concrete.

iv) Pumping reduces the total man hours for the concrete process.

v) Pumping can be used effortlessly in inaccessible areas.

vi) Complex concreting for tunnels can be done easily.

vii) Concrete can be pumped to greater heights and thus tall structures can be built easily.

viii) Since large volumes of concrete can be pumped, it allows the concrete to be cast monolithically thus reducing the structural joints in a structure.

Disadvantages Of Pumped Concrete:

i) It is uneconomical for projects with concrete volume lesser than 1000 cu.m

ii)There is risk of formation of blocks in the pumps.


  • Tall buildings
  • Tunnels
  • Underwater construction

19. Pervious Concrete

Pervious concrete is a special type of concrete that has high porosity and allows water to pass through it and recharge the ground water. It is widely used in pavements where it can allow storm water to pass through it. In pervious concrete, the fine aggregates used are minimized or totally neglected and thus making it porous. The porous nature of the concrete demands high maintenance and regular cleaning.


  • Pavements
  • Parking
  • Light traffic areas
  • Walkways
  • Green houses

20. Smart Concrete

Smart concrete is a special type of concrete that can self-monitor its health. Smart concrete can be self-sensing, self-healing and/or self-adjusting. Functional fillers such as carbon fibres, steel fibres, carbon nanotubes, nickel powder, etc., are added to the concrete to improves its ability to sense the stress, strain, and damages due to cracks. Some concrete in addition to monitoring the health has the ability to heal themselves. These functional fillers should be well distributed inside the concrete to prevent any lump formation.


  • High rise buildings
  • Regions prone to earth quakes
  • Highways
  • Bridges
  • Air field pavements
  • Dams
  • Nuclear power plants

21. Stamped Concrete

Stamped concrete also called imprinted concrete or textured concrete is a special type of concrete used for ornamental purposes in floorings of patios, sidewalks, parking, green houses, gardens, pools decks, and interior flooring. Mineral pigments shall be added to the concrete to get the required colour.

The concrete of required colour is laid and the surface is prepared for stamping. The stamping can be done using concrete stamps made of polyurethane, The stamping gives an embossed and classy look to the concrete which is often considered to be decorative.

22. Limecrete

Limecrete is a special type of concrete made using natural hydraulic lime, sharp sand, and glass fibres (optional). Limecrete makes the building energy efficient by improving its thermal performance. The limecrete unlike conventional concrete will not set in 24 hours. Limecrete is a hydraulic concrete using carbon dioxide in the air to harden and it takes time. It is more flexible than concrete. However, excess lime may hinder the breathing of people inside the building.

23. Asphalt Concrete

Asphalt concrete is widely used in pavement construction. It is made using aggregates, crushed stones and asphalt. Asphalt is a bituminous material that acts as a binder in the concrete. It is used in normal roads, highways, airport roads and parking lots. Asphalt is 100% recyclable ans is the widely recycled material in construction.

24. Bacterial Concrete

Bacterial concrete also known as self-healing concrete has the ability to repair the cracks and fissures by itself. This made adding special bacteria and calcium lactate to the concrete mix. The most common bacterium is Bacillus Pasteruii. When cracks are formed, water seeps through the cracks and initiate the self-healing process.

In the presence of water, the bacteria germinate by feeding on the added calcium lactate converting it into calcium carbonate – limestone. Limestone hardens over time and thus repairing the concrete by itself. With the help of bacterial concrete, the life span of the building can be increased to 200 years.

25. Smog Eating Concrete

Smog eating concrete is a recent development in concrete technology to fight against pollution in modern cities. It is made by adding a photocatalytic additive called Titanium dioxide to the concrete. This titanium dioxide in the presence of sunlight gets activated and reacts with the pollutants in the atmosphere to neutralise them into harmless salts. By doing so, it reduces the air pollution levels in the area surrounding the building. It can neutralise pollutants like Carbon dioxide, Nitrogen dioxide, and Sulphur dioxide.

Smog eating concrete building

Some other types of concrete are Sulphur impregnated concrete, Roller compacted concrete.

Also Read –

16 Types Of Cement Used In Construction

Types Of Slabs Used In Construction

Types Of Bricks Used In Masonry Construction

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