Abstract In mortars, the use of fibres has been diachronically a commonly used technique. Ancient Greece, wood and straw were particularly to increase volume stability in clay lime mortars. Overtime, with evolution technology, natural replaced by modern materials like polypropylene, steel, glass carbon fibres. Recently, climate change strong demand for independence from non-renewable mineral re...

In this study we evaluated the tribological performance of polypropylene composites with wood-flour fillers obtained as a by-product from wood-processing industry, which were based on unrecycled and recycled polymer matrices. The mechanical properties polypropylene-wood wood-filler loadings 0–40 wt % determined tensile tests their friction wear behaviours studied dry reciprocating ball-on-disc ...

The effects of polypropylene fibres on mortar and cement-paste cracking were investigated using different amounts fibre fractions eccentric rings under restrained-shrinkage conditions. Eccentric-ring tests conducted to investigate early-age shrinkage cracks. characteristics restricted cementitious materials described by evaluating the time concrete mixtures that are less likely crack. Different...

Kenaf fibre has a low environmental impact because it is recyclable, light density and strong to be used as product. Natural fibres, especially kenaf fibre, are undertilised understudied in 3D printing technology. technology gaining traction replace traditional methods saves cost production time. This study focuses on producing composite materials that can feeder for printing. different composi...

Ultra-high performance concretes (UHPC) are advanced cement-based materials characterised by superior mechanical properties with respect to normal and high-strength concretes; however, their dense compact matrix can facilitate the onset of spalling at high temperatures. This problem is often coped up adding polypropylene (PP) fibres mix design, alone or other types fibres; steel enhance materia...

A methodology for calculating aerosol filtration efficiency using non-woven filters with polydispersity distribution of fibre diameters was formulated. In order to verify the results calculations experimentally, made polypropylene fabric were used filter solid (soot) and liquid (oil) aerosols their mixtures different concentrations. increase accuracy calculations, division diameter into several...

Setiap bangunan terdiri atas bagian-bagian yang memiliki fungsi tertentu, tidak terkecuali juga balok beton. Elemen satu ini sangat berguna untuk menyangga lantai terletak di atasnya. Tidak hanya itu, ternyata peran sebagai penyalur momen menuju ke bagian kolom pada sedang dibuat. Perkuatan struktur beton menggunakan mutu tinggi (High Strength Concrete) dengan komposisi campuran yaitu semen, si...

Thermobonding is widely used in producing of nonwovens. In this study various layers of thermobonded nonwovens were produced by altering the pressure, binder fibres and quality of blending. Mechanical properties of the so-called layers such as breaking strength and breaking elongation, bending rigidity and air permeability were assessed consequently. The structure of the layers was then studied...

Identification and characterisation of microplastic (MP) is a necessary step to evaluate their concentrations, chemical composition and interactions with biota. MP ≥10μm diameter filtered from below the sea surface in the European and subtropical North Atlantic were simultaneously identified by visual microscopy and Raman micro-spectroscopy. Visually identified particles below 100μm had a signi...

Tensile tests were performed on two different natural fibre composites (same constituent material, similar fibre fraction and thickness but different weave structure) to determine changes in mechanical properties caused by various aqueous chemical treatments and whether any permanent changes remain on drying. Scanning electronic microscopic examinations suggested that flax fibres and the flax/p...