Modelling the Influence of Structural And Compositional Parametres On the Abrasion Resistance of Concrete

Makarova, Natalya Valentinovna (Far Eastern Federal University) | Polonik, Marina Vasilyevna (IACP, FEB RAS)

OnePetro 

ABSTRACT:

In this paper the wear model of concrete on the basis of the contact mechanics methods approach is presented. The theoretical modeling of a surface with the strengthened areas is applied to optimization of concrete structures. This model predicts that its abrasion strength depend on physical and geometrical characteristics of matrix and coarse aggregate. The experimental results support these theoretical predictions.



INTRODUCTION


Abrasion of concrete surfaces causes loss of effective thickness and, as results, decrease of load-carrying capacity of constructive elements. Therefore sufficient attention should be given to the abrasion durability of concrete in the projects of hydraulic engineering and transport reinforced concrete structures. The mechanics of friction interaction enables the analysis of wear failure process and phenomena which occur in friction interaction of moving components resulting in the energy and material losses in constructions. It allows determining serviceability of a construction during its destruction. Application of theoretical and experimental contact mechanics methods to an estimation of strength and durability of concrete constructions is hampered as against designs from metal, ceramics and other materials because of concrete structure singularities. Concrete is a heterogeneous material with brittle cement stone matrix and rigid particles. Therefore, for long time studying of the abrasion resistance of concrete was carried out experimentally in general. The investigation of wear failure process of concrete due to sea ice is developed in (Saeki, Asai, Izumi and Takeuchi, 1985), (Itoh, Yoshida, Tsuchiya and Katoh, 1988) and others. Those suggested empirical models enables us to consider the influence of ice to concrete surface and to calculate basic parameters which define intensity of abrasion wear, i.e. it depends from on length of route of the ice cover, or the pressure with which the ice-floe affects contact zone when sliding by.