_1278_W1476xH0.webp)
Durable repair of old concrete
Short and sweet
Refurbishment of Buildings
The repair of concrete structures serves to extend their remaining useful life. It is a minimally invasive intervention in the construction works, in which only what is necessary is removed and replaced. In this way, all project participants - operators, planners, application engineers and material suppliers - contribute to the conservation of natural resources.
Integrated overall concept
Mechanical properties combined with high durability and fire protection
For concrete repairs relevant to stability and not relevant to stability, taking into account the existing class of old concrete, we recommend our holistic solution concept. It combines the mechanical properties required for old concrete with the high demands on the durability of repair mortars and concretes. A major focus is on the interaction of elastic modulus and shrinkage. The lower the modulus of elasticity, the higher the shrinkage factor may be. The higher the modulus of elasticity, the lower the shrinkage must be.
_Albtalsperre_W1025xH0.webp)
Our overall concept allows for a suitable implementation of the repair depending on the object, component, location of the application area, type of application and local conditions. The concrete replacement systems are coordinated with each other. They fully meet the requirements of the respective quality levels R2 to R4 according to EN 1504-3. This is documented by the declaration of performance and the associated CE marking according to the Construction Products Regulation (BauPVO). A close-meshed quality control consisting of in-house and external monitoring ensures the continuously high product quality. The test certificates for the building material class "non-combustible" and the fire resistance class round off the overall concept.
_Fuchsbau_W1025xH0.webp)
Integrated overall concept
System table
| System | Concrete repair | Old concrete class | R-class according to EN 1504-3 | Static participation | Building material class according to EN 13501-1 | Fire resistance (ETK) according to DIN 4102-2 (1) or DIN EN 1365-2 (2) |
|---|---|---|---|---|---|---|
| StoConcrete Repair Prime TS 126 | StoCrete TS 126 | A2 | R2 | A2-s1,d0 | F120 (2) | |
| StoConcrete Repair Prime TS 136 | StoCrete TS 136 | A3 | R3 | STAT | A2-s1,d0 | F120 (2) |
| StoConcrete Repair Prime TS 100 | StoCrete TS 100 | A4 | R4 | STAT | A1 | F90 (1) |
| StoConcrete Repair Prime TG 203 | StoCrete TG 203 | A4 | R4 | STAT | A2-s1,d0 | F90 (2) |
| StoConcrete Screed Classic TG | StoCrete TG 114 StoCrete TG 118 | A4 | R4 | STAT | A2fl-s1 |
Monolithic model versus multi-layer model
Restoration in consideration of the regulations
The durability requirement for load-bearing structures made of reinforced concrete is defined in DIN EN 1992 (EC2). This is significant for the technical implementation of a repair. The requirements for an appropriately durable load-bearing structure are fulfilled if it fulfils its function in terms of load-bearing capacity and serviceability during the intended remaining service life without any significant loss of the service properties with an appropriate maintenance effort.
The monolithic model is used in new buildings. Here, a structural component is made entirely of just one concrete.
In contrast, renovation/concrete repair is based on the multi-layer model. A concrete replacement system is applied to the prepared concrete substrate. This multi-layer system must function together and permanently withstand the effects of the environment and the substrate. There must be no incompatibility.
Stresses occurring in the concrete replacement must be safely transferred into the concrete substrate.
Building authority requirements for fire protectio
Safety in case of fire fully guaranteed
In the event of a fire, the stability of a structure must be guaranteed for a specified minimum period of time. In structural fire protection, a distinction is made between the fire behaviour of building materials and the fire resistance duration of building components.
Fire protection requirements
The aim of fire protection is to protect life and health as well as property.
- Building material class
- With regard to fire behaviour, building materials can be classified in building material classes according to DIN 4102-1 or EN 13501-1.
- Example
- According to DIN 4102-1, "non-combustible building materials" are assigned to building material classes A1 and A2. According to EN 13501-1, classes A1 and A2-s1, d0 fulfil the building authority requirement "non-combustible".
- Fire resistance class
- The fire protection classification of building components in fire resistance classes according to DIN 4102-2 and EN 13501-2 can be used alternatively for the verification of the required fire resistance duration of a building component.
- Example
- The building authority requirement "fire resistant" is assigned fire resistance class F90 according to DIN 4102-2. According to EN 13501-2, this corresponds to class R90 for load-bearing building components without room closure.
- Note
- It should be noted that the classifications according to DIN 4102 and EN 13501 are not directly transferable to each other.
- Fire curve
- The fire resistance can be verified according to different fire curves.
- Example
- The unit temperature-time curve (ETK), for example, represents a fire scenario in residential construction.