The Possibility of Producing Self-Compacting Lightweight Concrete by Using Expanded Polystyrene Beads as Coarse Aggregate (original) (raw)
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European Journal of Environmental and Civil Engineering, 2021
This work aims to study the relationship between the results of lightweight self compacting concrete (LWSCC) made with waste expanded polystyrene (EPS) beads to find an empirical equation to predict mechanical characteristics and compare their results with code empirical equations. The workability and hardened characteristics were examined for sustainable LWSCC which was produced with a water to binder ratio of 0.35 and substituted the normal coarse aggregate with different volume fractions of EPS beads at 0%, 40%, 50%, 60%, 70%, and 80%. All the mixes contain a binder content of 500 kg/m3. Slump flow diameter and time, as well as V-shape flow time, were used to determine the workability of LWSCCs. Additionally, hardened properties such as dry density, ultrasonic pulse velocity (UPV), water absorption, compressive, flexural, and splitting tensile strengths are evaluated. The results confirmed that increasing the amount of EPS increased the workability of LWSCCs while decreasing the strength value, but the compressive strength met the lower limit specified by ACI for structural applications. Additionally, there was a strong linear correlation between the mechanical results. The actual strengths compared with the empirical models presented in codes and literature studies found that the actual results are closest to ACI 363.
2009
This paper presents the results of an experimental investigation on the effects of expanded polystyrene polymeric beads on the properties of light-weight selfcompacting concrete in fresh and hardened states. Since the aim of this study is to produce structural lightweight self-compacting concrete (with compressive strength above 17 MPa), EPS beads were partially substitute for aggregates by 10, 15, 22.5 and 30 percentages by volume. Fluidity and mechanical properties of selfcompacting EPS concrete was compared with ordinary self-compacting concrete with slump flow of about 65cm. The slump flow was kept in allowable range and the effects of EPS were evaluated on the other fluidity parameters such as V-funnel and L-box. The results obtained, showed that with increasing in EPS volume, Vfunnel time increased while blocking ratio decreased. At the stage of hardened concrete, compressive strength (at different ages), tensile strength, ultrasonic pulse velocity (UPV) and water absorption w...
This study presents an experimental research of Self-Compacting Concrete (SCC) properties containing waste plastic fibers (WPF). Adding waste plastics which resulting from cutting PET bottles as fibers to SCC with aspect ratio (l/d) equal to (28). To illustrate the effects of WPFs on the SCC, the current study was divided into two parts, the first part shows the effect of adding plastic fibers on the properties of fresh SCC, which include the ability flow, spread, passing and resistance to segregation, and the second part to evaluate the properties of hardened (mechanical) destructive and non-destructive, which include compression strength, flexural strength and ultrasonic pulse velocity test. One reference concrete mix was conducted and eight mixes contain WPF has been producing self-compacting concrete mixers containing a different volumetric ratio of plastic fibers (V f) % percentages (0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2) %. Three cubes samples were prepared for testing the compressive strength, three prisms were prepared for the test modules of rupture, one cylinder were prepared testing the modulus of elasticity. The experiments show that adding plastic fibers to SCC leads to an increase in the compression strength and modulus of rupture at 28-day as follows (42.30)% and (73.12)% respectively for mix ratio (1.5)% in comparison with the reference mix, which represent the best ratio of fibers, as such the results of testing the fresh concrete containing waste fibers showed that adding these fibers led a reduction in workability for SCC.
An attempt was carried out to develop some properties of self-compacted concrete (SCC) by adding waste plastic fibers (WPF) resulting from cutting beverage bottles. Many tests were conducted to investigate the effect of adding WPF on the fresh properties, whereas other tests were applied on that kind of concrete to study the effect of this type of waste on hardened properties. For this reason, different self-compacting concrete mixtures were designed at constant water-to-binder ratio of 0.35 and 490 kg/m 3 of binder content. The class F fly ash was replaced with cement as 25% by weight. The eighth designated plastic fiber contents of 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25%, 1.5%, 1.75% and 2% by volume. The workability properties of self-compacting concrete mixtures were performed to slump flow diameter, T 50 slump flow simultaneously, V-funnel flow at the same time, and L-box height ratio. The 7, 14 and 28-day compressive strengths of self-compacting concretes were also measured. Moreover, the 7, 14 and 28-day flexural strengths of concretes were also measured. The test results showed that the plastic fibers have adverse effect on the fresh properties of self-compacting concrete and improvement by hardened properties.
International Journal of Recent Technology and Engineering (IJRTE), 2019
All over the world, wide amount of demolishing waste is being generated posing lot of environmental issues. To address these issues, Self-Compacting Concrete (SCC) was made by replacing cement partially with mineral admixtures and NCA with RCA. The fresh and hardened properties for M30 grade of SCC made with NCA and RCA were evaluated. Cement in SCC was recouped partly with 30% Fly Ash, 20% GGBS by weight of the cement. Polypropylene fibers at 0.1% were added to study their influencing nature on the hardened state and fresh state properties of the SCC mix. Four sequences of SCC mixes of M30 were prepared by substituting the NCA with RCA at 25%, 50%, 75% and 100% derived from the dismantled concrete waste of M30 parent grade. SCC produced with the RCA up to 50% and with 0.1% addition of Fibers demonstrated comparable performance as that of SCC with NCA.
Annales de Chimie - Science des Matériaux, 2021
The use of waste and by-products has been for many decades for the manufacturing of building materials such as concrete and mortars. That responds simultaneously to reasons of economy of natural resources in aggregates (C&D waste) and the possibility of recovering industrial waste additions as replacement in composites. The present study focuses on the use of plastic waste fibers embedded in the cement matrix of self-compacting concrete SCC to improve its properties, either rheological mainly, the stability at fresh state or mechanical responses such as compressive and tensile strengths at hard state. This incorporation of plastic fiber reinforcement on the structure matrix could result an alternative SCC composite as a ductile material with enhanced properties. In this context, the self-compacting composites by adding a variable percentage of plastic fibers at 0.5, 1, 1.5% is formulated. Hence, the effect of plastic fibers waste on the rheological and mechanical properties of SCC i...
Tikrit Journal of Engineering Sciences
Different properties of Self-compacting concrete (SCC) containing plastic waste aggregate (PWA) have been experimentally studied by researchers. However, most of these works focused on examining the properties of one type of PA. In the present paper, the influence of four different types; namely Polyvinyl chloride (PVC), Heat-treated plastic (PEL), Mixed plastic (Mix), and polyethylene terephthalate (PET) as a fine aggregate (FA) replacement; on fresh properties of SCC was examined. Results indicated that changing the PWA geometry influenced different properties of SCC. All concrete samples with PVC and PEL plastic were in the range of EFNARC classification (classified in VS2/PA2 class), causing no blocking in V-funnel and L-box test. Meanwhile, mixed plastic up to 7.5% and PET up to 5% fall within VS2/VF2 class; otherwise, the mixture was outside the range of EFNRAC standards. The best plastic waste aggregate regarding all new properties was PVC confirming all requirements for a su...
Performance of Polypropylene Fiber Reinforced Self-Compacting Lightweight Concrete in Hardened State
2016
This study investigates how the inclusion of polypropylene fibers affects the mechanical properties of selfcompacting fiber lightweight concrete (SCFLWC) made from natural lightweight aggregate (scoria) that existed in the western province of Saudi Arabia. Mixes with different fiber volume fractions (0.0, 0.2, 0.4 and 0.6%) at different levels of fly ash (0.0, 10, 20 and 30%) as a replacement by weight of cement were prepared and tested. The performance of SCFLWC were studied in terms of mechanical and transport properties. The mechanical properties were conducted by comprising the compressive, splitting tensile & flexural strengths and the modulus of elasticity at 28 and 90 days. While transport properties were measured using the rapid chloride penetration test at 28 and 90 days. All mixes achieve self-compacting properties using polypropylene fiber up to 0.4% fiber content. The SCFLWC mixes have a slump flow in the range of 610–690 mm. Polypropylene fiber have a little effect on t...
VALORISATION OF WASTE EXPANDED POLYSTYRENE IN CONCRETE USING A NOVEL RECYCLING TECHNIQUE
This study examines the engineering properties of lightweight aggregate concretes (LWAC) incorporating a novel Expanded Polystyrene (EPS)-based lightweight aggregated called Stabilised Polystyrene (SPS). The SPS aggregate was produced by 80% waste EPS, 10% clay and 10% cement. The influence of the increasing incorporation of SPS on the workability, density, compressive strength, flexural strength, ultrasonic pulse velocity (UPV), drying shrinkage, expansion and water absorption of the different concretes, has been investigated. The results showed that the use of SPS enabled to reduce the density of concrete by 8–52% compared to that of the control concrete. The reduction of density was due to the increase of total porosity in the lightweight concretes, which also induced higher water absorption, drying shrinkage and expansion. The 28-day compressive strength of the LWAC was in the range of 4.6-16.4 MPa; thus the concrete mixture with the higher performances almost satisfied the mechanical and density criteria of structural lightweight concrete. These results show that the utilisation of SPS for the manufacture of lightweight aggregate concretes is possible.