CRAS in the pool

Demolition in areas with a high population density is one of the situations in which the characteristics of CRAS, the demolishing cement produced by the Basque company Kayati SL, allow to achieve quick, safe and effective results.

We see in this report how CRAS has been used to demolish a large stone inside a hotel, in the pool area. The use of explosives was totally out of place in this environment, as was the use of heavy machinery. It is the CRAS field.

The way of carrying out the demolition with the expansive cement is done in total safety during a period of maintenance of the hotel installations. The process begins with drilling with manual machinery, according to a distribution of perforations that allows to design in advance how the break will occur and where the debris, to be removed after the operation, will be generated. Kayati's experience of nearly thirty years in demolitions using CRAS is offered to the contractors of these works.

In the images you can see how the rock breakage happens, silently, with no vibrations affecting the environment. In this case, the absence of vibrations is especially appreciated, because the basin of the pool adjacent to the demolition area has not been affected throughout the process.

The mosaics around the pool were not affected either. In just over twenty-four hours, with the rock breaking already made, it was possible to remove the debris from it.

Once this last task had been carried out, no one could have said that, a few hours before, a rock had been demolished in that area.

CRAS' reputation has been forging over decades on projects like this one, as the building contractor's best friend when it comes to demolition. At Kayati SL we are very proud of such as reputation.

Making room in the basement

 Making room in basements is one of the secret wishes for more homeowners. Although sometimes they unsuitable areas, due to the existence of humidity, a basement can allow to gain a very useful volume as a cellar or warehouse

The photos shown in this report have been taken in the works to expand the basement in a cottage, an indoor domestic demolition, one of the CRAS specialties, the demolition cement manufactured by the Basque firm Kayati SL.

Indoor demolitions cannot be carried out using explosives or heavy machinery. These are projects that must be carried out without generating vibrations that could damage the structure of the house and those of neighboring buildings.

Once the drilling of the area to be removed has been carried out - in this case, a rock in the basement floor of a rural house - the next operation is to load the holes with the mortar made with CRAS.

The expansive force generated from the hydration reaction that occurs in the mortar  causes that, after a few hours, cracks begin to appear in the rock, which is gradually demolished and, after 48 hours, reduced to small fragments that can be removed without difficulty.

The images show the break between the perforations, whose dimensions -diameter, depth and distribution- are defined according to the type of rock to be demolished and the environment in which the demolition is executed. The experience that Kayati SL makes available to its clients enables demolitions to be carried out efficiently, optimizing the use of CRAS and the total cost of demolition.

In short, when it comes to carrying out demolitions inside buildings, the use of CRAS demolition cement is the cleaner, faster, safer and more efficient alternative from an economic point of view, something that Kayati SL clients value very positively.

Foot break in concrete wall

 The images that we show in this month's report correspond to a demolition carried out in South America, one of the areas of the World in which CRAS, the demolition cement manufactured by the Basque firm Kayati SL, offers solutions to the construction sector when a demolition with no explosives is needed. The challenge this time was, apparently, simple: removing the foot in the base of a concrete wall.

Things, however, are not so simple in this type of project. These demolitions have to be carried out in a quasi-surgical way, since the integrity of the rest of the wall is at stake, which can be damaged by the vibrations produced by a demolition using explosives or percussion machinery. Complications grow if, in addition, the work is carried out in an urban environment, or near roads.

The way in which CRAS executes demolition allows clean cuts, which end up breaking the part to be eliminated into fragments whose shape and size can be designed depending on how the perforations made to deposit the mortar prepared with the demolition cement. Kayati SL offers advice to its clients to define the parameters to be taken into account in these projects: diameter and depth of the perforations, their distribution, type of CRAS suitable to the conditions in which the demolition is carried out, especially the temperature ... With more than a quarter of a Century of experience in demolition projects, Kayati SL offers not only a leading product in quality, but also first-class technical support.

In the images, the first that can be seen is the distribution of the perforations, with the mortar already loaded. In this case, a mesh-shaped perforation has been made, parallel to the wall to be maintained, and with the first row of perforations flush with this wall.

After a few hours, the breaking process, generated by the hydration reaction begins to crack the concrete in parallel to the wall that has to be preserved. Shortly after is the moment when the concrete separates into "slices" ready for rubble.

The result is, once again, a clean, fast, efficient and safe work and a satisfied customer, this time ten thousand kilometers away from the CRAS manufacturing site.

Rock removal in urban area with CRAS

The project presented in this report combines two characteristics that make it especially suitable for CRAS, the non-explosive demolition cement manufactured by the Basque firm Kayati SL. This is a demolition work that had to be carried out in the centre of the city, an urban stage in a hilly area.

The goal of the demolition was to gain volume between buildings in the urban area of mountain town, which would allow a gain of buildable space, something scarce in the area due to its orography, thus providing great value for the final customer.

As the images show, the use of explosives to carry out this work was totally out of consideration. The construction site was located downtown, with a sidewalk and road a few meters away and with neighbouring houses. In addition to the inconvenience that roadblocks, noise and vibrations could cause to neighbours, the use of explosives would have generated dangerous projections of debris, and would have had unwanted effects on the structure of surrounding buildings.

The way how demolitions are executed with CRAS meets perfectly the requirements of this type of situation. First of all, it is not necessary to ask for any type of administrative permit related to the use of explosives. Nor is it necessary the use of heavy machinery. 

The process begins with the drilling of the rock to be demolished. In this case, a 63 mm drill bit was used to drill 3 meters deep, distributed according to the CRAS manufacturer's instructions. Mortar made with CRAS Yellow, one of the versions of this product, was poured into these holes.

After 48 hours of the CRAS pouring, there was a break in the rock, which was reduced to debris -easily removable- in the next hours. After removal, the result was the creation of some valuable buildable square meters in the area.

This project is one more example of how the CRAS eases demolition works and becomes an essential ally for building professionals when it comes to carrying out demolitions where explosives cannot be used.

Gaining space to the mountain

The economy of mountain areas is a story of love and hate with the orography. The same mountains that generate wealth are scant when it comes to giving up space for human implantation. Building in the highlands has its particularities, one of which is that, sometimes, you have to create the space to build. The clearings and embankments are common in the construction of buildings as well as infrastructure. And CRAS, the non-explosive demolition cement manufactured by the Spanish firm Kayati SL, is an ally in the fight for space in mountainous terrain.

The images included in this note shows a clearing carried out in a hilly area. The goal of this demolition project was to steal square meters from the mountain, to allow road improvement and the building of a house.

The use of CRAS in this project allows its viability. Being a demolition work carried out in an inhabited area, the use of explosives was totally forbidden for security reasons. CRAS performs the demolition by expansion, without blasts, noise or annoying vibrations. In some cases it is the only possible way for demolition.

The demolition was performed not only safely, but also quickly and economically, two other virtues of the cement created by Kayati SL. In the images can be seen the marks of the perforations carried out to allow the pouring of the mortar kneaded with CRAS and water.

In addition to giving a solution to the major problem of clearing, CRAS was useful to perform some minor demolitions, such as the rock seen in the image on the right, that was an obstacle to the works in the place where they were carried out the emptying.  The CRAS ease of use, without the need of special permits for demolishing works, guaranteed the success of this demolition project.

The final result was a new small victory in the eternal war between the humans and the mountains. A fair battle in this case, given the environmentally friendly features of CRAS.

Demollition of isolated rocks with no explosives

Kayati's CRAS is the most suitable method to crack isolated blocks without noise and blasts.

In some hours, rocks break in smaller parts, matching the pattern drawed by drillings.

Please visit us as www.kayati.com for further information on this and other applications of CRAS.

Making room for a lift

These pictures show how CRAS, demolition cement manufactured in Spain by Kayati SL, is used as a demolition mortar to remove 8 sqm of granite.

 This demolition project is a phase of a larger project, the renewal of a lift.

 Demolition has been done in two layers, to get the 2 meters deep.

 At the end of the demolition work, there was space for concrete and for the rest of the lift installation.

More information on CRAS at www.kayati.com