![]() When grouting injection products for force transmitting filling (F), the injection product is grouted without pressure using gravity or capillary suction on cleaned, prepared cracks ensuring a constantly filled filler reservoir. With multi-component injections, the individual components are transported separately under pressure from the injection device to the mixing head, mixed and conveyed on to the packer. In the case of single-component injections, the ready-mixed injection product is pressure-transported from the injection device to the packer. A distinction is made between single-component injections and multi-component injections. In the case of injection products made of polyurethane (PUR), the insulation does not necessarily have to be used. The injection product is injected using an injection device under controlled pressure via packers with insulation. Injection products for ductile filling (D) and for swelling fitted filling (S) are applied exclusively by injection. Injection products for force transmitting filling (F) are applied by injection or grouting. Suitable materials include acrylic gels consisting of a reactive acrylic binder, catalyst, initiator and water and possibly polymeric fillers. They are therefore only fit for use in permanently damp environments. Injection products for swelling fitted filling of cracks (S) adsorb and release water repeatedly (swell/dry). Swelling fitted filling (S) of cracks and voids is used to seal concrete structures.In the case of water flowing through the crack, fast-foaming polyurethane (SPUR) with sufficiently short reaction times and sufficient volume increases may be applied for sealing, where appropriate, before the actual injection is made. ![]() EP), provided that they have sufficient ductility. ![]() Suitable materials include polyurethanes (PUR) as well as modified epoxy resins (mod. Injection products for ductile filling (D) are suitable for accommodating subsequent movements to a limited extent. Ductile filling (D) (with limited ductility) of cracks and voids is used to close (crack width control by filling), seal and bond (with limited ductility) concrete structures under static and dynamic loading.Furthermore, injection products formulated with hydraulic binders are used, e.g. PUR), provided that they have a sufficient force transmitting performance. Suitable materials include epoxy resins (EP) as well as modified polyurethanes (mod. Injection products for force transmitting filling (F) are able to bond the crack flanks and transmit tensile, compressive and shear forces depending on the strength properties of the injection product. Force transmitting filling (F) of cracks and voids is used to close (crack width control by filling), seal and bond concrete structures under static and dynamic loading in a force transmitting way.The filling objective 'ductile filling with limited ductility' aims at producing a bond between the crack or concrete flanks that is ductile to a limited extent and has filler-specific strength properties.ĭepending on the filling objective and the type of injection, the following injection products and systems are differentiated:.The strength of these bonds depends on the type of repair product and the repair procedure used. The filling objective 'force transmitting bond' aims at producing a compression-, shear- and tension-resistant bond between the crack or concrete flanks.The filling objective 'Sealing' includes eliminating crack- and void-related leaks and restoring the impermeability of a concrete structure by filling with injection products. ![]()
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