Which brick is best for construction clay or red brick ?

Fly ash brick is better than red brick. Because of following reason :-

Fly Ash Brick

This bricks are manufacturing by mixing Quarry Dust / River Sand , Stone aggregates less than 6mm in Size, Cement and Fly Ash

Note :- Fly Ash quantity will be 10% to 20% of Cement

Normally the actual cement quantity required will be replaced with 10% to 20% Fly Ash. Any brick contains cement will increase the heat inside building . Fly Ash Bricks with plastering on both sides will again increase more Heat .

When we are manufacturing One Metric Ton of Cement equal quantity of CO2 ( Carbon di Oxide ) will also get generated . So we are poluting the atmosphere .

Bricks

Bricks have high thermal mass which is what makes them absorb more heat as compared to AAC blocks. The bricks absorb heat during the day and release it at night

Red traditional bricks are known to be more durable and the structures made from them are stronger than the ones made from hollow blocks

Bricks are nothing but highly compressed earthen materials. The high compression makes them so dense that there is very less space left for combustion to ignite and spread

Masonry bricks are almost free of maintenance. Once constructed with, they do not require as regular maintenance as block constructions do from time to time.

Note :-

Red brick has a higher decay rate than fly ash.
Fly ash has better ensuring strength than red brick.
For A known fact red brick is not at all nature friendly.
Fly ash brick absorbs more vibration than red brick.
Fly ash brick can be used in support structures but red bricks can’t.
Lastly fly ash  is cheaper than red brick.

Comparison of Red Bricks and Fly Ash Bricks

PropertiesRed Bricks/Clay BricksFly Ash Bricks
Density1600-1750 kg/m31700-1850 kg/m3
Compressive strength30-35 kg/cm290-100 kg/cm2
Absorption15-25%10-14%
Dimensional stabilityVery low toleranceHigh tolerance
Wastage during transitUp to 10%Less than 2%
PlasteringThickness vary on the both sides of wallEven on both sides

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