Development of a technology for obtaining materials to eliminate cracks in large-scale objects
- 1 — St. Petersburg State Polytechnic University
- 2 — St. Petersburg State Polytechnic University
- 3 — St. Petersburg State Polytechnic University
- 4 — St. Petersburg State Polytechnic University
- 5 — St. Petersburg State Polytechnic University
Abstract
Formulations of low viscosity unfilled compositions designed for sealing of welds and injecting into small cracks at low pressures, with two curing options: at temperatures of 15-30 and 4-15°С were developed. Formulations of filled compositions were created: for injection into small cracks, filling caverns and defects on flat surfaces and for filling large cracks and pores at high pressure. An active diluent was selected to regulate the viscosity of the filled materials. A mechanical device for measuring the adhesion strength of compositions in the temperature range from -70 to 150°C has been developed. It is established, that according to the value of adhesive strength the developed adhesives can be used for repair of steel constructions, and compounds - for "healing" of cracks in concrete and granite bases.