Recycled concrete aggregates and mixed recycled aggregates are specified as types of aggregates with lower densities, higher water absorption capacities, and lower mechanical strength than natural aggregates. In this paper, the mechanical behaviour and microstructural properties of natural aggregates, recycled concrete aggregates and mixed recycled aggregates were compared. Different specimens ...

the creep/recovery behavior of wood flour-polypropylene was compared with medium density fiberboard (mdf) and particleboard. for this purpose, wood flour-polypropylene composites (with and without compatibilizer)were manufactured by using a laboratory twin-screw extruder. the mdf and particleboard panels were obtained from local producers. short term flexural creep tests at 30% of ultimate bend...

We study how a manufacturer’s recycled content claim decision is impacted by demand for recycled content through environmentally preferable purchasing (EPP) programs and supply uncertainty. We model a manufacturer making a recycled content commitment that can commit to a minimum recycled content that holds for every period (product specific claim), or an average recycled content across periods ...

PURPOSE To compare fibroplasia and the resistance of the abdominal wall when polypropylene meshes and polypropylene/poliglecaprone are used. METHODS Seventy-seven male Wistar rats were divided into three groups: Control Group (for resistance); Group E (polypropylene mesh); and Group U (polypropylene/poliglecaprone mesh). The animals in Groups E and U had a standard muscular and aponeurotic de...

Transient electronics are becoming a hot topic due to the rapid development of bioelectronics, self-destructive devices and environmental sensors. This letter reports a novel scheme for triggering degradation of 250 μm-thick Mg target using acetic acid regarding transient electronics applications. The triggered transience has also been demonstrated using commercial vinegar. To achieve programma...

The use of virgin and recycled plastic macro fibers as reinforcing elements in construction materials has recently gained increasing attention from researchers. Specifically, have become more attractive owing to their large-scale availability, negligible cost, low environmental footprint. In this work, we investigate the benefits related fully-recycled synthetic dispersed reinforcement Fiber Re...

Among the emerging environmental issues within Sub-Saharan Africa is the haphazard disposal of plastic waste, some of which end up downstream in the marine environment leading to negative effects. Notably there have been cases of humpback whales getting entangled in ‘ghost’ fishing nets, and endangered turtles ingesting plastic wastes in Watamu beach in Kenya. The aim of the current study was t...

In this study blanket trimmings and mechanically recycled fibers were blended softly pre-needlepunched to be used as innerlayers of conventional needle-punched nonwovens. The outer layers from three types raw materials (polypropylene, polyester fibers) the control groups produced by classical needle-punching at two different needle-punch densities. Abrasion resistance bending properties end pro...

This work reports the effect of octavinyl polyhedral oligomeric silsesquioxane (OvPOSS) on tuning electrical performance polypropylene (PP). OvPOSS with different content are introduced into PP using solution method. The microstructural morphology, crystallinity behaviour, breakdown strength, DC conductivity, space charge formation, and trapping level distribution measured. results indicate tha...

Making construction waste into raw materials for recycled concrete is beneficial resource conservation and environmental protection. This paper investigated the effects of different brick aggregate (RBA) replacement rates (30%, 50%, 70%, 100%) contents polypropylene fibers (PPFs) (0.08%, 0.10%, 0.12%, 0.16%, 0.2%) on mechanical properties concrete. Gray correlation was also used to analyze degr...