Special construction works

Special construction works refer to a set of works that require special equipment, materials, knowledge and skills that are not required in standard construction procedures. Special works usually provide properties that cannot be achieved through standard procedures. They also restore the fundamental properties to the building if they have been compromised during construction or use.

Grouting

Grouting as a remediation measure ensures integrity, durability and full functionality of the structure, as well as durability and mechanical and material properties. For the purpose of ensuring durability and protection of construction materials, grouting is a recommended measure against the penetration of harmful factors from the environment or stored contents. It is also used for moisture control, seepage of liquids and degradation processes they initiate (concrete carbonation, electrochemical rebar corrosion, alkaline-silicate reaction…) or degradation, destruction and loss of stored material or inventory.

Our practice is to use specially designed or factory-prepared materials for grouting that are custom built to be used as:

materials based on high-strength and high-bonding epoxy resins for force transmission, bonding and rehabilitation of the load-bearing structure.
acrylic and polyurethane crack filler materials with elastoplastic properties for increased structure ductility or for waterproofing.
reactive swelling materials to prevent direct water penetration.
suspensions based on microcement, colloidal microsilica and polymeric materials for foundation soil stabilization and improvement.
silicate or silicone suspensions for preventing capillary moisture.

Grouting

Grouting as a remediation measure ensures integrity, durability and full functionality of the structure, as well as durability and mechanical and material properties. For the purpose of ensuring durability and protection of construction materials, grouting is a recommended measure against the penetration of harmful factors from the environment or stored contents. It is also used for moisture control, seepage of liquids and degradation processes they initiate (concrete carbonation, electrochemical rebar corrosion, alkaline-silicate reaction…) or degradation, destruction and loss of stored material or inventory.

Our practice is to use specially designed or factory-prepared materials for grouting that are custom built to be used as:

materials based on high-strength and high-bonding epoxy resins for force transmission, bonding and rehabilitation of the load-bearing structure.
acrylic and polyurethane crack filler materials with elastoplastic properties for increased structure ductility or for waterproofing.
reaktivne bujajuće materijale za sprečavanje direktnih prodora vode.
suspensions based on microcement, colloidal microsilica and polymeric materials for foundation soil stabilization and improvement.
silicate or silicone suspensions for preventing capillary moisture.

STRUCTURAL AND NON-STRUCTURAL REPAIR

Structural and non-structural repairs of a building are procedures of remediation and restoration of the geometric or functional properties of structural elements. Non-structural repairs include elements that do not primarily participate in the mechanical resistance of the structure, whereas structural repairs include load-bearing structural elements whose repair affects load-bearing capacity or durability.

Hydrodemolition

Hydrodemolition is a process of selective removal of material (mainly concrete) with minimal impact on the remaining material. A high-pressure water jet (60-200 MPa) is used in the process, adjusted to remove the material up to certain mechanical propertieswhile leaving the material above a specified threshold intact. This is the greatest advantage of the said technique over the classic mechanical methods of removal, which significantly affect the remaining material and locally impair its mechanical properties.

Shotcrete

When pouring concrete, there is often a need to install it without classic formwork, on vertical surfaces, soffits or slopes. In order to achieve the required mechanical properties and compactness without a mould, sprayed concrete is applied. Fresh concrete is rheologicallyenhanced with chemical additives, sprayedthrough a system of nozzles at high speed, and compacted upon the impact with a surface. During this process, chemical additives instantly change the rheological properties of the concrete and provide a thixotropic effect in order to achieverelatively large layer thickness, retainingmaterial inplace until it hardens.

Diamond cutting

Diamond cutting and drilling of concrete is a process of reconstruction or dismantling of a building with no vibrations, noise and dust, which makes this procedure suitable for use in urban areas and on facilities that are in service during the construction work. Thanksto the absence of vibrations, diamond cutting procedures can also be used when working on structures that do not tolerate being vibrated(heritage buildings, fragile structural elements...).

STRUCTURAL REINFORCEMENT

Structural reinforcement is the process of increasing the mechanical resistance of a structure or restoring its deteriorated properties due to unforeseen exploitation impacts, incidents or natural disasters.

Glass and carbon fibre reinforcement

FRP (fibre reinforced polymer) refers to composite products intended for strengthening and repairing building structures. They are manufacturedin the form of prefabricated strips, multidirectional and unidirectional textiles, mashes and strands. Their exceptional fibre strength, light weight, fatigue resistance, UV stability and favourable mechanical properties provide simple and technically elegant solutions. The fibres are mainly based on carbon, glass or basalt, and the matrix is made of a polymeric binder, mainly epoxy resin. If FRP is installed with polymer-cement binders, then we are talking about TRM (textile reinforced mortar) or FRCM (fibre reinforced cement matrix) systems, which are used for earthquake remediation and reinforcement.

Prestressing

Prestressing is a procedure in which the structure is enhanced to a more favourable stress state or deformation. Prestressing is performed during the production of construction elements (prefabrication) or in-situ at construction site. In special cases, prestressing of the structure can be done as a subsequent measure in repairing damage or improving the mechanical resistance of the building. CFRP (carbon fibre reinforced polymer) laminates are suitable for subsequent prestressing thanks to their mechanical properties and resistance to environmental influences.

FOUNDATION REMEDIATION

Remediation of buildings due to foundation problems is often one of the most demanding remediation procedures. The impact of an inadequate foundation on the structure is manifested through several aspects – from local or global loss of stability, differential settlement or settlement outside expected values, up to significant deformations and loss of structural integrity.

Remediation mainly comes down to improving the geomechanical characteristics of the soil through additional consolidation or strengthening procedures, changing the geometry of the foundation and adding new elements to the foundation structure.
Sub Vision d.o.o. provides the service of geotechnical surveying and research works, geotechnical design, as well as works on improving the geotechnical characteristics of the soil through grouting and micropiling works.

FOUNDATION REMEDIATION

Remediation of buildings due to foundation problems is often one of the most demanding remediation procedures. The impact of an inadequate foundation on the structure is manifested through several aspects – from local or global loss of stability, differential settlement or settlement outside expected values, up to significant deformations and loss of structural integrity.

Remediation mainly comes down to improving the geomechanical characteristics of the soil through additional consolidation or strengthening procedures, changing the geometry of the foundation and adding new elements to the foundation structure.
Sub Vision d.o.o. provides the service of geotechnical surveying and research works, geotechnical design, as well as works on improving the geotechnical characteristics of the soil through grouting and micropiling works.

Floor remediation and reconstruction

Floors are generally neglected or overlooked during the design stage because they are characterized as secondary structural elements. In reality, they withstand direct and (often) the harshest mechanical and chemical loads caused by an inappropriate use. This often results in bad and inadequate solutions that later cause major maintenance costs, disrupt the production process and influence product quality.

When renewing floors in production plants, the duration of the works is often the primary factor in a feasibility study.
Sub Vision d.o.o. provides the service of designing and executing industrial floor reconstructions using techniques and materials that ensure minimal downtime in manufacturing. When removing existing floor systems, we use equipment that does not produce vibrations and ensures complete dust removal, while the materials we use reach full mechanical and chemical resistance within several hours, even at low temperatures (down to -20⁰C).

Prefabricated structures

Execution of prefabricated structures, partially or completely, has a number of advantages, from lower construction costs and shorter construction deadlines to better and more uniform quality thanks to controlled production conditions.
Sub Vision d.o.o. offers the service of designing and b prefabricated structures in accordance with the investors’ requirements.

Prefabricated structures

Execution of prefabricated structures, partially or completely, has a number of advantages, from lower construction costs and shorter construction deadlines to better and more uniform quality thanks to controlled production conditions.
Sub Vision d.o.o. offers the service of designing and b prefabricated structures in accordance with the investors’ requirements.

Earthquake remediation

Earthquake-damaged structures need to be remediated and strengthened to a level sufficient for the expected seismic stress and category in accordance with the current rules and legislation.
Sub Vision d.o.o. offers damage assessment and investigation of earthquake-stricken buildings, including earthquake resistance evaluation by the non-linear (“push-over”) method in accordance with Eurocode and cutting-edge practices. Also, our services involve reconstruction and reinforcement design, as well as the execution of works.