Hybrid glass fibre reinforced composites containing silica and cement microparticles based on a design of experiment

Abstract

Hybrid Glass Fibre Reinforced Composites (HGRFCs) made with unidirectional glass fibres and silica or cement microparticles inclusions were investigated in order to improve their performance under flexural and impact loadings. Two full factorial designs were conducted to evaluate (i) the effect of the particle weight fraction on the compressive modulus of epoxy polymer (2 1 3 1) and (ii) the effect of the number of layers and type of particle (3 2) on the apparent density, flexural modulus and strength of HGFRCs. Composites with higher flexural properties were evaluated under impact loading via one-way analysis. TGA and FTIR analyses were used to verify the effect of ceramic particles within the polymeric phase. A microstructural analysis (SEM) was performed to verify the fracture mode and better assess the mechanical performance of HGFRCs.

The effect of Portland cement inclusions in hybrid glass fibre reinforced composites based on a full factorial design

“…These authors observed a good correlation between tensile and flexural modulus, which corroborates the observations that the increase in flexural modulus can be attributed to the stiffness increase of the reinforced matrix under tensile and compressive loadings [14,15]. Considering that particulate composites exhibit, in general, higher compressive stiffness and strength while fibrous materials exhibit higher tensile stiffness and strength, Torres et al [16] have investigated the effects of silica and cement particle inclusions on hybrid glass fibre reinforced epoxy composites. Particle inclusions at the upper (under compression) beam side provided a significant increase in flexural modulus (19.60% for silica and 28.70% for cement particles).…”

Cold-Pressed Hybrid Composites Reinforced With Coir Fibres and Cement Particles: A Statistical Approach

“…In general, the inclusion of cement microparticles provided better results on the mechanical properties of modified matrices when compared to silica results. Similar findings have been reported by Torres et al [27] and Martuscelli et al [28], which evaluated the modified epoxy polymer matrix with silica and cement microparticles under compression. This mechanical enhancement has been attributed to the presence of hydrated cement products, which stiffen the polymer [28].…”

The influence of low amounts on in situ-polymerized bisphenol-diamine net in cement slurries prepared in seawater – structural analysis after long-term contact with in situ-generated mud-acid fracturing fluid

“…In such type of polymerized material, diglycidyl ether of bisphenol A, which is a product of reaction of bisphenol A and epichlorohydrin, is primarily cured by a given diamine producing a crosslinked polymerized resin, where thermal curing of the polymeric system is not a pre-requisite beforehand [10]. In fact, diamine-extended epoxy polymers have been reported to have excellent reactive characteristics in such polymeric system, where the presence of ether groups, polar aliphatic hydroxyls, and some residual unreacted amine groups provides strong interactions between bisphenol-type polymeric nets and cement [11,12]. Yet, another important advantage is that diamine-extended epoxy resins may be used in relatively low amounts in a given cement formulation (typically less than 10 % in relation to cement mass), without loss of efficiency or remarkable changes of the rheological properties of the cement slurry [13].…”