STANDARD HYDRAFORM BLOCK HF 220 measures between
220 and 240 mm long X 220mm wide X 115 mm deep, and has
beveled / champhered edges. Block length is controlled by
soil / Ash load and moisture content. 37-38 blocks of 230
mm length are required per sq. m of 9" walling and
165 - 170 blocks may be required per cu.m of 9" walling.
Hydraform Conduit Block also measures
same as Standard Hydraform Block with provision for conduit
and horizontal reinforcement applications in Earth Quake
resistant construction applications.
220 mm blocks for above ground level superstructures are
usually manufactured to an approximate compressive strength
of a 4 MPa with a 1:20 cement: soil mix ratio. Adding higher
cement ratio makes higher compressive strength blocks of
With Hydraform machines Fly Ash Blocks can be made using
50-60% Ash, added with other materials viz sand/dust, cement,
Lime, Gypsum in appropriate ratios. Using different combinations
and available raw material quality, blocks can be made with
compressive strength ranging from 7 - 20Mpa.
MOULDS TO MAKE DIFFERENT SIZES FOR VARIOUS SPECIALIZED CONSTRUCTION
variety of moulds are available to make specialized blocks
specialized construction applications. The extra moulds
are available as optional accessories, which may be purchased
HF 150, the economical 150 mm Block has
interlocks, which seat the block, allowing a mason to construct
using minimal cement slurry between them. These blocks are
used as an inexpensive alternative to walls build with standard
Hydraform 220mm blocks. The applications can be framed building
walls – internal /external, boundary walls etc.
Hydraform Bricks can be made from Hydraform
machine using special mould. These bricks are practically
double of standard brick with beveled / champhered edges
for better aesthetics and handling. Twin brick is useful
for internal / external wall applications and can be used
on 115 mm as well as 150 mm wall thickness with additional
advantage of saving the mortar due to twin brick.
Please consult Hydraform Engineers for Technical details
and assistance that comes with the machine and is available
Blocks can be made from Hydraform machine using special
mould. Paver blocks of 115 mm thick ness and appropriate
cement and coarse sand for making drifts.
can assist you writing a spreadsheet, which allows users
to input their own parameters and cost their Hydraform blocks,
commercial block yard and construction at their own site.
Depending up on raw material costs near the site, both cost
and selling prices are comparable to the cost of cement
blocks and bricks. Interlocking and other features of Hydraform
blocks save further on construction. We would be happy to
assist you on this.
Attractive Hydraform split Bricks are formed using a mould,
which produces two standard - sized bricks per compression
stroke. The bricks comes out pre-split with / without frog.
Interchangeable moulds for above Blocks / bricks are available.
We can consider providing tailor made special block
sizes to suit your construction requirements.
Please consult Hydraform engineers on recommended
block options to suit specific construction requirements.
Hydraform machine made blocks can be Cheaper than bricks
COMPRESSED STABLIZED EARTH
The use of earth (soil) with scientifically backed technology
inputs like stabilization using cement and / or lime and
then hydraulic compaction of the mix catching up wall in
different parts of world. The earth used is a sub-soil.
The brick-block making and resultant construction is very
eco-friendly. It does not eat away top soil useful for agriculture
and has less embodied energy since there is no burning of
bricks / blocks in process and uses lesser cement in comparison
to concrete blocks.
Emphasize is on maximum utilization of local resources
with minimum efforts on long term basis to make it a part
of sustainable development activity.
Hydraform with years of field experience have refined
the CSEB technology application so that most of the soils
can be worked on to make these blocks. However soil selection
must be done carefully with expert guidance. The soil used
in CSEB mix shall be free from deleterious contents such
as organic matter of vegetable origin, mica, schist and
saline impurity. Its grading shall be such as to require
the least amount of admixture to make it suitable for stabilization
with cement. The most suitable soil should have 20-30% clay
and 30-50% coarse sand. Soils like Black cotton soil and
similar which have very high clay content are uneconomical
to stabilize, should be avoided.
However, it is always recommended to get particle size
distribution analysis and field tests done before the block
production is started. Hydraform trained engineers can always
suggest a suitable mix design to over come any major deviations
in soil characteristic.
A variety of soil can be stabilized by using cement in
range of 5-10%, which leads to increase in strength.
CSEB are a comparable alternative building material to
concrete and burnt bricks. Hydraform machine made CSEB is
an energy efficient, highly esthetic, thermally efficient
alternative to burnt bricks. The process involves soil selection
> mixing with water and stabilizer usually cement in
Hydraform mixer > hydraulic compaction of a mix in Hydraform
Good quality interlocking blocks with minimum strength
of 7 MPa and water absorption less than 12% can be used
below plinth as per procedure recommended by Hydraform.
In high moisture areas, it is generally recommended to use
stabilized soil block in construction of super structure
above plinth level. The wall made with Hydraform interlocking
bricks / blocks can be left as exposed wall or as per local
requirement minimal plaster, coating, paints can be applied.
The construction below can be in usual, built with conventional
materials like bricks, stone, lean concrete etc in line
with local building codes. Usual damp- proofing courses
are inserted to prevent access for moisture, and also precautions
are taken against attack by termites.
In high moist or extreme wet-dry cycle conditions, groove
grouting and water protection paint coating could be considered.
Hydraform machine made blocks are interlocking and have
uniform finishes requiring minimal mortar and plaster, but
users have option to use the same in case the project requirements
FLY ASH BRICKS / INTERLOCKING
Fly ash blocks / bricks is an established technology and
its use is increasingly being promoted in the areas where
there is abundant burnt coal ash is available, being the
waste from coal based thermal power projects. Ministry of
environment and forest, Govt. of India has issued guidelines
for mandatory use of fly ash in bricks / blocks on progressive
basis for construction with in 100 km of every power project.
Good grade Fly ash is a very good raw material for construction
usage. Hydraform India has further improvised on the established
and time tested technology to use Fly Ash by using variety
of alternative raw material options / mixes to make fly
ash interlocking blocks that are of very good quality and
finish. Hydraform machines made fly ash interlocking blocks
have been used at various locations for making buildings,
community centre, school with minimum mortar and plaster
and at some locations even with NO MORTAR & NO PLASTER!
The manufacturing process of Fly ash blocks / bricks requires
fly ash, coarse sand / stone dust, gypsum and lime (optional)
to be added in a suitable proportion and mixed in a pan
mixer. Optimum Water is added. The mix is hydraulically
pressed and water cured for minimum 14 days to let the block
reach full strength over 28 days.
The quality of the bricks - blocks may vary with factors
like Quality of Fly Ash and other raw material, Proportion
of mix, mixing and curing.
Recommended quality of raw material is: dry fly ash collected
from 1st or 2nd fields of ESPs, sludge lime - a waste from
acetylene industries, Gypsum of purity of more than 80%
and OPC cement.
However other permutation and combination is also possible
like Fal G etc but it advisable to seek professional help
wherever required to suit the local suitability.
Hydraform machine made Fly Ash blocks / bricks are lighter
in density thus saving on the structural cost.