Concrete rehabilitation

Surface preparation

Before a surface is coated, the undersurface (concrete, steel, screed etc.), must be prepared according to the required standards and rehabilitation guidelines.

• Separable substances (concrete film, impurities etc.) are removed completely and without harming the undersurface.
• Required surface roughness values for a filler coat, a layer of gunned concrete or mortar is executed precisely.
• Non-bearing old coatings are removed completely or, if required, in part.

The optimum adherence between undersurface and coating material is of the essence for a lasting and professional execution of a new coat, providing security to the contractor with regard to warranty regulations.

Concrete repair

Concrete, the great building material of our era, is nowadays used in almost every structure – mostly combined with steel reinforcement. It is not only normal deterioration (so-called carbonisation) which causes damage to the concrete and the reinforcement, but also environmental influences (static overloading or salt spreading). Thus, in order to guarantee the safety of the structure, timely and competent repair of the concrete is necessary.

• Hydrodemolition of carbonised and sodium chloride corroded concrete to the required working depth, either manually or using a hydrodemolition robot (horizontally, vertically and overhead)
• Execution of grooves on load-bearing structures using a hydrodemolition robot
• Hydrodynamic exposure of expansion joint systems

The advantages of preparing surfaces and repairing concrete by means of high-pressure waterjetting are:

• Single procedure for both preparation and repair work
• Creation of optimum adhering undersurface – required values of adhesive strength are achieved
• Economical through high surface productivity, works are not dependent on weather factors
• Optimum result through repetition accuracy of waterjetting parameters
• No formation of dust and problem-free disposal of residual particles
• No secondary damages caused by cracking
• No damage to reinforcement or tendon