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Blocalians

Concrete block with thin joint

The traditional thick-jointed concrete block is still the lion's share of the market for masonry walls, which account for 70% of single-family home construction. To its qualities of resistance and ease of implementation, have been added others, related to new or refined techniques of manufacture or employment. The so-called "thin seal" technique applied to blocks is the subject of specialized manufacture.

Block production cycle

Block production cycle

Compared with the traditional thick-jointed installation, thin-joint installation meets two strong demands from companies:

  • a decrease in the arduousness of mason work
  • a productivity gain of the laid wall.

If we add the environmental concern related to the development of HQE (High Environmental Quality) approaches, the thin-jointed concrete block offers in all these areas, real opportunities.


Since 1999, industrialists have been developing and proposing a "calibrated" concrete block that allows a thin-jointed installation that reduces mortar consumption by 80 kg / m.2 at 7 kg / m2.

The concern at the time was to make it easier to accommodate a shortage and low-skilled workforce. Hardness is greatly diminished when measuring the quantity moved ten times less of mortars.
This calibrated block requires that the first row be made carefully and perfectly level, the following ranks arise with great ease.
The seal is applied to the laying sail with a notched shovel filled with adhesive mortar.
Vertical joints are dry mounted.
The big advantage of this building system lies in the lack of necessary accessories.
The corner blocks for vertical chaining, cutter blocks, and smooth abutment blocks are delivered together to eliminate the risk of a site being slowed by a lack of supply of one type of element.

Advantage: 30 to 40% of time saved

The measured return on worksite experiences, shows, once past the brief learning of the method, productivity gains that amount to 30 to 40% of time saved.
The condition of success has been the need to intervene in training directly on construction sites to put the technique into practice for new teams.

  • This first calibrated thin-joint Block is a traditional looking block whose calibration goes through a manufacturing on metal planks and finer machine settings and controlled more sustained.
  • This type of manufacturing is done at a lower rate than a traditional block.
  • Its extra production cost is of the order of 15 to 20%.
  • The estimated balance sheet for companies is a gain of around € 4 per m2 laid.
  • Many entrepreneurs who have made this choice do not go back.

The next step will be the transition to Concrete Blocks even more precise in terms of flatness of the faces to be bonded, called "rectified blocks".

The thin-jointed Concrete Block takes up and retains the basic qualities of the Traditional Concrete Block.
Its composition remains classic. But it is an original product: specific block, studied to be mechanically rectified on its lower and upper faces with dimensional tolerances of the order of a millimeter. After crushing the joint, the thickness of the binder-glue will be of the order of a millimeter, resulting in an even more significant decrease in the consumption of this product, 2.5 kg / m².

The transition to the "rectified" block

The passage to the block to stick

The companies members of the Blocalians group put their dynamics and their know-how at the service of the development of this innovation considered essential in addition to their traditional ranges in order to meet the evolution of the requests of the companies adept of the glued pose.
The Slim Joint Block is a real revolution for the building trades and is one of the most significant advances since the invention of the traditional Concrete Block.
If its composition remains classic, it is in fact a product entirely original: it is a specific block, studied to be mechanically rectified on its lower and upper faces with dimensional tolerances of the order of a millimeter.
Perfect flatness thus obtained allows its installation with a binder-glue, ready to use, whose resistance is largely at the level of that of the traditional mortar. This is the great innovation proposed by the Bloc Concrete Joint Thin.
The simple range of perfectly adapted accessories facilitates the operation of this new component.

Decisive advantages

Decisive advantages

The thin-set Concrete Block offers multiple critical benefits for the choice of this product:

  • speed and simplicity of installation, even for an inexperienced workforce
  • precise fitting due to perfect calibration and outstanding finish
  • exceptional cleanliness of the sites
  • perfect adaptation to all types of construction: individual or collective housing, industrial, agricultural, self-construction and renovation
  • homogeneity of facades, which is crucial for the good performance of coatings
  • solution adapted to the current expectation of companies: economy of labor, low consumption of binder-glue, speed of implementation...
  • after crushing the joint, the thickness of the binder-adhesive will be of the order of a millimeter, resulting in an even more significant decrease in the consumption of this product, 2.5 kg / m².

The thin-set Concrete Block has the same strength as the traditional Concrete Block, and its thermal and acoustic performance is exactly the same as that of its predecessors.
Finally, this new Concrete Block fits perfectly into the same HQE approach as traditional fabrications.

  • It allows optimal management of the water and energy used on the site.
  • It also limits pollution, water consumption and significantly reduces waste at the source.

By its manufacturing process, its palletization and its implementation, the thin-set Concrete Block produces no waste.

  • It is totally recyclable.
  • Incorporating the HQE criteria to ensure the durability and adaptability of the structure, the thin-jointed concrete block also has the advantage of limiting nuisances of all kinds: acoustic, vibration, dust, pollution on the ground.

Thanks to the thin-joint method of laying the concrete block, it can be evaluated at 30%2 wall mounted, reducing the environmental impact.

(photos / visuals: © Blocalians, except special mention)

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