Bending characteristics of resin concretes

Abstract

In this research work the influence of composition and curing conditions in bending strength of polyester and epoxy concrete is analyzed. Various mixtures of resin and aggregates were considered in view of an optimal combination. The Taguchi methodology was applied in order to reduce the number of tests, and in order to evaluate the influence of various parameters in concrete properties. This methodology is very useful for the planning of experiments. Test results, analyzed by this methodology, shown that the most significant factors affecting bending strength properties of resin concretes are the type of resin, resin content and charge content. An optimal formulation leading to a maximum bending strength was achieved in terms of material parameters. Keywords: polymer concrete, mechanical characterization, mechanical behaviourcal and corrosion properties of such concretes allow thinner cross-sections and lower cover depths in reinforced concrete, reducing transport costs and handling risks.As Portland cement concrete, resin concretes relatively have low tensile strength, when compared to compressive strength (around 100 MPa). Therefore, brittle cracks due to tensile stresses can occur, making it necessary in many cases to use steel or FRP rebars, increasing ultimate load, ductility and toughness [3][4][5][6] . The main objective of this work is to analyze the influence of mixture and curing cycles in the bending behaviour of polyester and epoxy concretes.The planning of various mixtures was achieved with a Taguchi methodology. This technique allows an analysis of the effect of several manufacturing factors [7][8][9][10][11] . This technique also allows the identifying of interactions between factors, reduction of mixture combinations through a library of pre-set orthogonal matrices, without loss of relevant information [7][8][9][10][11] . To perform all possible tests with all possible mixture combinations would not be practical, neither in time nor cost.

Sustainable waste recycling solution for the glass fibre reinforced polymer composite materials industry

“…Plain polymer mortar specimens were also casted and tested in order to compare mechanical and functional properties with those of GFRP waste admixed mortars. The composition of plain formulation was developed in previous studies on statistical significance of synergetic effects between material components [42,43].…”

“…Planning of experiments and data treatment were performed by means of full factorial design and through appropriate statistical tools based on analyses of variance (ANOVA). These methodologies have shown to be powerful tools in the optimisation processes of mixtures, mix designs and processing parameters e.g., [40][41][42].…”

Re-use assessment of thermoset composite wastes as aggregate and filler replacement for concrete-polymer composite materials: A case study regarding GFRP pultrusion wastes

“…The mix design of the reference PM formulation was in accordance with previous studies carried out by Ribeiro et al (2003b), in which a polyester resin binder with similar viscosity was applied. With a basis on the reference PM formulation, different PM formulations were prepared by mixing the resin binder, with and without silane coupling agent additive, with different sand aggregates/GFRP waste ratios.…”

“…Added value of the recycling solution was assessed by means of flexural and compressive load carrying capacities of GFRP admixed mortars with regard to unmodified PMs. The planning of experiments and data treatment were accomplished by means of full factorial design and through appropriate statistical tools based on analyses of variance, which over the last years have shown to be powerful tools in the optimization processes of mixtures, mix designs and processing parameters (Correia et al, 2009(Correia et al, , 2010Muthukumar and Mohan, 2004;Ribeiro et al, 2003b).…”

Mechanical properties of castor oil polymer mortars

“…PM was first developed in the 1950's and then became widely known in the 1970's 1 . The composition of PM is determined by its applications, and its strength is influenced by ratio of aggregate to resin content 2,3 . PM is used very efficiently in precast components.…”