Top

Blocks

Hydraform HF220 block is the standard HYDRAFORM block and is suitable for external 9″ thick walls. The block shape is interlocking with beveled / champhered edges. Interlocking blocks can be used in dry masonry or with mortar slurry. First course (above DPC), lintel and top courses are mortar layered. It is recommended to consult the local building codes and structural engineer for suitable application.
170 full length blocks will comprise 1 cu. m of wall masonry, where as 37 full length blocks will comprise 1 sq. m of 9” wall.

Block dimensions (in mm) are:
Length: +- 120 – 240 mm
Width: 220 mm
Height: 115 mm

Hydraform HF220 conduit block is similar in dimension and application as HF 220 block above with additional provision for conduit for horizontal reinforcement applications in Earthquake resistant construction applications.
Block dimensions (in mm) are:
Length: +- 120 – 240 mm
Width: 220 mm
Height: 115 mm
It is recommended to consult the local building codes and structural engineer for suitable application

Hydraform HF150 block is suitable for external / partition 6″ thick walls. The block shape is interlocking with beveled / champhered edges. These blocks can be used with mortar slurry. First course (above DPC), lintel and top courses are full mortar layered. It is recommended to consult the local building codes and structural engineer for suitable application.

250 full length blocks will comprise 1 cu. m of wall masonry, whereas 37 full length blocks will comprise 1 sq. m of 6” wall.
Block dimensions (in mm) are:
Length: +- 120 – 240 mm
Width: 150 mm
Height: 115 mm

In fill, partition walls and thinner outer walls

  • HF 150 Block has interlocks, 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.
  • Twin 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.

Paver Blocks can be made from Hydraform machine using special mould. Paver blocks of 115 mm thickness and appropriate cement and coarse sand for making drifts.

Please consult Hydraform engineers on recommended block options to suit specific construction requirements. We can consider providing tailor made special block sizes to suit your construction requirements.

NATURE OF BLOCKS AND RAW MATERIAL OPTIONS

COMPRESSED STABLIZED EARTH BLOCKS (CSEB)

Stabilized earth (soil) blocks are commonly used in construction since long time. In olden times use of rammed earth, lime stabilized soil blocks was a common practice. The earth used for making blocks is a sub-soil dug at least 1 m below the ground level. The block making and resultant construction is very eco-friendly. It does not consume top soil useful for agriculture purpose nor does it affect the soil fertility of the area which is otherwise affected in fired kiln brick making process. Stabilized Earth (SEB) has less embodied energy since there is no burning of bricks / blocks in process and it uses lesser cement or lime is used in comparison to fired bricks or concrete blocks. In the process there is maximum utilization of local resources with minimum effect on long term basis that makes it a sustainable technology. CSEB is a competitive alternative building material against concrete blocks and burnt bricks. Hydraform machine made CSEB is an energy efficient, highly aesthetic, thermally efficient alternative to burnt bricks.

Hydraform has years of field experience in the CSEB technology application. 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:
Clay: 20-30%, and
Coarse Sand: 30-50%

Soils like Black cotton soil and similar with very high clay content are practically difficult to handle and uneconomical to stabilize thus should be avoided.

It is always recommended to get particle size distribution analysis and field tests done before the block production is started or whenever soil is changed. Hydraform trained engineers can always guide on how to select soil and suggest a suitable mix design to overcome any major deviations in soil characteristic.

The blocks making process involves soil selection, sieving to ensure no organic materials or pebbles above 4mm are excluded, mixing coarse sand (if required), cement and with water at OMC level in Hydraform pan mixer; and thereafter feeding the mix for hydraulic compaction in Hydraform machine to form a high finish block.

Good quality interlocking blocks with minimum strength of 7 MPa and water absorption less than 12% can be used below plinth with mortar 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. Plastering on 2-3 course above ground level from DPC level onwards is always recommended. The wall made with Hydraform interlocking bricks / blocks can be left exposed or as per local requirement with minimal plaster, coating, paints as may be required. The construction below plinth can be in conventional method with 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.

FLY ASH BRICKS / INTERLOCKING BLOCKS

Fly ash blocks / bricks is an established technology with established standards in large parts of world. Fly Ash is an industrial waste and is residual of burnt coal. It is typically available in plenty where coal is fired in power generation process. Use of Fly Ash in construction is increasingly being promoted in the areas where it is available in abundance. Ministry Of Environment and Forest (MOEF), 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 based 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 centres, school, industrial walls & sheds with minimum mortar and plaster and at some locations even with NO MORTAR & NO PLASTER!

Like soil, fly ash is available in various grades and quality depending on quality of coal, coal firing technology, ash handling, etc. Thus it is recommended to check the Ash quality to get best quality blocks. The manufacturing process of Fly ash blocks requires fly ash, coarse sand / stone dust, cement, gypsum and lime (both optional) to be added in a suitable proportion and mixed in a good quality pan mixer like Hydraform. Optimum Water is added. The mix once homogeneous is fed in Hydraform machine and hydraulically pressed and water cured for 7- 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 a 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 requirement.

Please consult Hydraform experts to not only make quality blocks but in cost efficient proportion of raw material. Hydraform machine made Fly Ash blocks can also be made with medium to light density thus saving on the structural cost.

The construction process is same as mentioned above in CSEB

Share Hydraform with others!

Bottom