Repairing and maintaining concrete constructions/concrete repairs comprises a large number of specialised activities.
Concrete repairs start with a proper analysis of the issue and continue with a long-term maintenance contract. The large diversity of the working area and the specialised applications make it an extremely knowledge-intensive sector. SealteQ invests heavily in skilled personnel. From the academic concrete maintenance experts at the SealteQ branches to our qualified skilled people on the building site.
Damage analysis and determining the appropriate repair method.
- Analysing damage is a specialisation in itself and requires:
- Knowledge of the material, reinforced concrete, itself
- Insight into the deformation behaviour of the overall construction
- Retrieving the history of the construction phase and the usage phase
- Assessing the damage, including any invisible defects on the basis of a detailed analysis. The use of various research methods often proves to be necessary. From simple tapping (acoustic examination) to using advanced radar or ultrasound technology.
- Determining the most influential damage mechanism and any possible additional damage mechanisms on the basis of a thorough analysis of all the data that were obtained.
- Determining the repair method. The repair method comprises the required technical measures and any additional environmental factors and available budgets.
- Implementing the measures, which is centred on a structured/certified implementation method. Relevant requirements include:
- NEN-EN 1504. A modular series of European standards.
- BRL 3201-2 (amendment to a new BRL is expected shortly).
- The relevant CUR Recommendations, of which the new CUR Recommendation 118 recently replaced the older versions 53 (repair with cement-bound mortars), 54 repair with shotcrete) and 55 (repair with polymer-bound mortar). Also CUR Recommendation 56, inject (amendment is expected shortly) , CUR Recommendation 45 cathodic protection in conjunction with European standard NEN-EN 12696, CUR Recommendation 20 (determining bond strength), and many other professional standards.
As concrete is literally applied everywhere, the working area of a concrete-repair company is enormous. From a residential building to underground car parks to heavy industry and road building and hydraulic engineering. In other words, concrete repair is an extremely diverse professional area with a wide range of markets, each with its own challenges and opportunities. The professionals of SealteQ have been trained in this complex matter to serve you with top-quality services and the added value of a knowledge partner.
The following concrete-repair methods are part of our competencies:
Traditional concrete repair, caused by carbonation-induced rebar corrosion or coverage issues. Application of all manner of manual technology, such as troweling, filling and a wide range of certified products. Cement-bound (CC or PCC) mortars or polymer-modified (PC) mortars. Certified method in accordance with EN 1504, CUR Recommendation 118 and BRL 3201
Constructive repair or reinforcement by using shotcrete or filling, with or without additional rebars. Wet and dry spray method, pourable and pumpable mortars, etc. Certified method in accordance with EN 1504, CUR Recommendation 118 and BRL 3201
Constructive reinforcement measures or applying external rebar, such as carbon FRP or bonded strands or bars. Has to comply with NEN 8700 and the Building Decree
Injecting cracks or constructive adhesives for the benefit of long-lasting protection of the reinforcement steel Certified method in accordance with EN 1504, CUR Recommendation 56 and BRL 3201.
Waterproof injecting and applying sealant systems and waterproof membranes Certified method in accordance with EN 1504, CUR Recommendation 56 and BRL 3201
Applying wear and protective layers for all manner of surfaces and loads. From plastic floors in residential and non-residential buildings, including underground car parks, to bridge deck membranes and highly chemical-resistant finishing systems for industrial applications.
Carbonation-retardant coating systems and high-grade aesthetic or anti-static finishes are additional finishes that may be applied.
Cathodic protection of steel rebar in the event of high corrosion activity of the steel rebar. Usually applied to damage as a result of penetrating or mix-in chlorides. We use so-called passive galvanised systems, for example with zinc anodes, or active current-controlled systems with a surface-covering anode system or drilled-in anodes.