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perplasticising and water-reducing admixture based on new polymer technology for the Appl. Sci. 2022, 12, 2867 6 of 20 Low Fibre Content HRFP-2 production of low viscosity concrete even at low water content. A total of 3 different concretes were designed: a control concrete (HFC), a fibre-rein- forced concrete with a volume of 4 kg/m3 (HRFP-4), and finally, a fibre-reinforced concrete with a volume of 2 kg/m3 (HRFP-2), see Table 1. Table 1. Mix proportions. Table 1. Mix proportions. Material (kg/m3) Refer3e5n0ce Water3 210 Cement Low Fibr3e5C0ontent 210 210 Reference HFC High Fibre Content HRFP-4 High Fib3r5e0Content Material (kg/m ) HFC HRFP-4 HRFP-2 Sand 0/2 800 800 800 Cement 350 350 350 Sand 0/3 623 623 623 Water CoarSsaendag0g/r2egate 6/12 210 210 210 Sand 0/3 623 623 623 Superplasticiser 5.3 5.3 5.3 Coarse aggregate 6/12 600 600 600 Polyethylene fibres - Water/Cement 0.6 4 2 5.3 Water/Cement 0.6 Superplasticiser Polyethylene fibres - 5.3 5.3 806000 8600 80600 0.6 0.6 4 0.6 2 0.6 Figure 5. Grading curve. Figure 5. Grading curve. 2.6. Workability Tests The Abrams cone test was carried out in accordance with the EN 12350-2:2009 stan- dard [60], seen in Figure 6. 2.7. Physical Properties To perform the physical characterisation tests on concrete, specimens obtained from cutting standardised cylinders (300 mm high and 150 mm in diameter) in 3 sub-samples of 100 mm high were used. The procedure followed to determine the physical properties of fibre-reinforced concrete, such as the density, porosity, and absorption coefficient, was based on the EN 12390-7:2009 standard [61].PDF Image | Recycled Polyethylene Fibres for Structural Concrete
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