Statistical data on the physical and mechanical properties of fibre reinforced alkali activated uncalcined earth based composite

Abstract

This article presents statistical data on the reinforcing effect of three different fibres (sisal, eucalyptus pulp and polypropylene) on the physical and mechanical properties of an alkali activated natural soil produced using extrusion technique for the development of earth-based building materials. The experimental testing program involved characterisation of composite mixtures including a plain unreinforced stabilised matrix (which was plain soil mixed with alkali activator solution) as well as composite mixtures incorporating 3 volume fractions of fibres (0.5, 1.0 & 2.0 vol.%) of each fibre type. Composites were tested to evaluate physical properties (density and water absorption) and flexural response under 4-point loading in both dry and saturated conditions. The obtained values were statistically analyzed using one-way analysis of variance (ANOVA), followed by Tukey multiple comparison tests to ascertain the effect of the reinforcing fibres on the physical and mechanical properties of the composites. Results obtained show unique reinforcing effects of the different fibre types in the alkali activated matrices and the sensitivity of the earth based matrix to variations in fibre volume fraction. This data article is related to “Effects of Fibre Reinforcements on Properties of Extruded Alkali Activated Earthen Building Materials” [1].

Revaluation of Australian palm residues in polypropylene composites: Statistical influence of fiber treatment

“…ANOVA analysis verifies the statistical difference between samples, and the Tukey test allows to understand the interaction between samples pair. 60 Table 6 shows the statistical results, and the samples were evaluated with one characteristic variation: i) PR concentration variation; ii) MPR concentration variation; iii) fixed PR and MPR concentrations. In Table 6, the sign (≠) means that the values are statistically different, while (=) means they are statistically equal, with a 95% confidence level.…”

“…For PP-MPR composites, lower concentrations (20 and 30%) showed statistically different mechanical properties than pristine PP, which is explained by the higher fiber surface exposure after alkali treatment, which increases the fiber-matrix interactions. 51 , 60 Since fiber-matrix interactions impacts directly on tensile stress, it was possible to observe that surface treatment was efficient for improving composites’ stiffness. This result is interesting since may expand the formulation at lower concentrations and improve the processing conditions and future applications, since high fiber contents may present problems with fibers dispersion or thermal degradation.…”