VARIATION OF CONCRETE BASE'S CLEANING GRADE AND ESTIMATION OF PROTECTIVE COATINGS

The investors try to execute durable concrete and avoid an expensive protective coating in new build waste-water-treatment plants. The similar establishment at the currently building waste-water-treatment plants in Stuttgart, Gubin and Poznan is applied. This approach is based on principle of the material and structural protection of construction in a new build waste-water-treatment plants erected by execute suitable durable concrete and formed in system formwork which are equipped in special active mat. The most important role of active mat (for example Zemdrain or described in this paper Agepan RS) is to noble the on surface layer of concrete by local reduce w/c ratio. The concrete surface formed in special active mat characterised by following properties: higher homogenous, smaller absorption, flexibility for carbonisation and chloric ion diffusion, higher freeze resistance and strength. [1] This paper presents the effects of research of the adherence of firm's mat combinations (for example Polyment, Sika, and Schomburg) on concrete bases, formed in system formwork. The authors analysed a few cases of adhesion one- and multilayer coating covered on an ordinary concrete bases formed in an active curing mat. Dissolving using the flow-abrasive method, cleaned the surfaces. At the end of etching process the layer of the thickness of lmm was grinded. The results of tests were the base to execute a project for concrete protection in bioreactor wall in waste-water-treatment plants built in Poznan.

• INTRODUCTION

• THE PROGRAM OF LABORATORY RESEARCH

• THE COAT ADHERENCE TO CONCRETE BASE SETTLED IN THE LABORATORY RESEARCH

• FIELD TESTING MECHANICAL PROPERTIES OF THE SURFACE CONCRETE LAYER

• CONCLUSIONS

• ACKNOWLEDGMENTS

• REFERENCES