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Laterite in Goa Sem I: - Harsimar and Shripriya

Laterite is a rust-colored soil formed from the weathering of rocks in hot, wet tropical areas. It is abundant in Goa, occurring in thick layers throughout the state. Laterite has high iron oxide content which gives it its red color. It is commonly used to make compressed earth blocks for construction due to its cohesive properties from clay and strength from sand and gravel. Some key uses of laterite in Goa include residential buildings, churches, bridges, and it can be cut into bricks using machinery.

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Sonali Chamadiya
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207 views12 pages

Laterite in Goa Sem I: - Harsimar and Shripriya

Laterite is a rust-colored soil formed from the weathering of rocks in hot, wet tropical areas. It is abundant in Goa, occurring in thick layers throughout the state. Laterite has high iron oxide content which gives it its red color. It is commonly used to make compressed earth blocks for construction due to its cohesive properties from clay and strength from sand and gravel. Some key uses of laterite in Goa include residential buildings, churches, bridges, and it can be cut into bricks using machinery.

Uploaded by

Sonali Chamadiya
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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LATERITE IN GOA

SEM I
- HARSIMAR AND SHRIPRIYA
LATERITE OVERVIEW
Commonly considered to have formed in hot and wet tropical areas.

Nearly all laterites are of rusty-red coloration, because of high iron oxide content.

They develop by intensive and prolonged weathering of the underlying parent


rock.

It is the best natural material available to be used in compressed Earth blocks.

It consists of well graded soil that combines both, cohesive(slit and clay) and
cohesionless(sand and gravel) parts of a soil.
DIFFERENT SIZES USED
● 390 x 190 x 190
● 490 x 190 x 190
● 590 x 190 x 190
AVAILABILITY AND SIGNIFICANCE

2/3rd of Goa is covered with mantles of laterite ranging


in thickness from couple of metres to 25 meters.

The laterite in goa occurs as plateau and detrital


laterites throughout the length and breath of Goa.

It is also extracted from the stone quarry located in


bicholim area.

It is abundant , relatively easy to cut and shape


compared to other materials.

It has Shown good performance in many applications.


Eg- Viceroy arch, Patto bridge etc.
CONSTRUCTION METHODS
It is first excavated from naturally occuring laterite sources.

Stone is ground and filtered using sieve which is then mixed with 5% cement mixture and chemical setting agent.

It is then cut into bricks, using machinery appropriate to the desired cut

NORMAL BRICKS INTERLOCK BRICKS


REGULAR METHOD

PROS CONS

Absence of air gaps ensures no insect and Cost inefficient since there are additional
bacteria culture growth. cement and sand costs.

Suitable in all environments. Time consuming process.

High durability. Labour intensive.

Relatively less smooth finishing.


INTERLOCKING METHOD
PROS CONS

Embodies lower energy due to use of naturally Due to absence of mortar for masonry, joints
locally available materials. may become dry.

Only energy is spent on transportation of The gap between the interlocks enables insects
materials. to set up their homes.

High recyclability factor as no connection using Incase of rainwater there is rapid colour change.
mortars are made.
It is not suitable for structures that are higher
than 2 floors.
CASE STUDY 1: RESIDENTIAL SPACE

FERNANDES HOUSE

● This is a residential building in Panjim.


● It was built in 1852 and has been in use since then.
● Materials like cement and laterite are used to make walls
● Mangalore tiles are used for the roof.
● Galvanised iron grills are used.
● Masonry was done using common laterite bricks.
●
CHURCH CASE STUDY

● The church was constructed with laterite stone that was brought from
bassein which is 300 kms away from Goa.
● Since the laterite stone gets stronger with time, a Portuguese
conservationist removed the lime plaster that was done on the outer
walls of the church.
● The cathedral has been built on a raised plinth of laterite covered over
with lime plaster.

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