scholarly journals Effect of Using EVA as Partial Replacement for Coarse Aggregates on Concrete Properties

2021 ◽  
Vol 9 (2) ◽  
pp. 58-63
Author(s):  
Moatasim Attaelmanan Alnour Mustafa ◽  
Mohammed Izzeldeen Mansour Ibrahim ◽  
Mohammed Tawfeeg Mohammed Alradey ◽  
Mohammed Altayeb Berier Alsheikh
Keyword(s):  
Vinyl Acetate ◽  
Lightweight Concrete ◽  
Ethylene Vinyl Acetate ◽  
Weight Percent ◽  
Partial Replacement ◽  
Standard Mixture ◽  
Normal Concrete ◽  
Suitable Material ◽  
Coarse Aggregates ◽  
Concrete Mix

Ethylene-vinyl acetate (EVA), is the copolymer of ethylene and vinyl acetate. The weight percent of vinyl acetate usually varies from 10 to 40%, with the residuum being ethylene, also EVA is an elastomeric polymer that makes materials which are (rubber-like) in fineness and flexibility. In this study, EVA waste was used in the concrete mix instead of different percentages of coarse aggregates (5%, 8%, 10%, 12%) by volume. The concrete slump test was performed to measure the workability of freshly made concrete. The compression test was performed on all samples at 7 and 28 days. The results were compared with the standard mixture. It was concluded that EVA was a suitable material to replace coarse aggregates. Accordingly, the results of these experiments indicate that not only EVA can be noticed as aggregate in concrete, but also it will have more advantages in lightweight concrete than normal concrete. Using of EVA concrete shows decrease in slump for further replacement without compromising on strength. The best replacing ratio was 5% of aggregate.  

scholarly journals PROPRIEDADES DE ARGAMASSAS COM EVA (ETHYLENE VINYL ACETATE) EM SUBSTITUIÇÃO PARCIAL AO AGREGADO

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Cleidson Carneiro Guimarães ◽  
Érica Souza Andrade
Keyword(s):  
Vinyl Acetate ◽  
Industrial Waste ◽  
Raw Materials ◽  
Ethylene Vinyl Acetate ◽  
Project Managers ◽  
Partial Replacement ◽  
Construction Sector ◽  
Cement Ratio ◽  
Aggregate Content ◽  
Hardened State

RESUMO: O setor da construção civil apresenta grande potencial para aproveitamento de vários tipos de resíduos industriais. A incorporação dos resíduos, principalmente nas argamassas e concretos, produtos com vasta aplicabilidade no setor, tem se mostrado como uma ótima alternativa na diversificação das matérias-primas e para a economia de recursos naturais. Esse trabalho avaliou as propriedades das argamassas, no estado fresco e endurecido, produzidas com substituição parcial da areia por resíduo de EVA (Ethylene Vinyl Acetate). Para isso, foram preparadas argamassas com teores de substituição do agregado 0% (referência), 5%, 10% e 15%, em massa. A relação água/cimento, para cada traço, foi determinada empiricamente e mantida constante para as argamassas com substituição. Os resultados apontam que as argamassas produzidas com agregado de EVA apresentam menor absorção de água e também um decréscimo da resistência mecânica. Desta forma, a produção de argamassas utilizando EVA em substituição ao agregado natural é viável, todavia é necessário avaliar os parâmetros mínimos de aplicação para cada finalidade. Dessa forma, o trabalho apresenta contribuição ao servir de suporte a gestores de empresas de argamassas ou gestores de obra a tomarem decisões acerca da inserção do resíduo de EVA na produção de argamassa. ABSTRACT: The construction sector has great potential for use of various types of industrial waste. The incorporation of waste, especially in mortar and concrete products with wide applicability in the industry, has proven to be a great alternative for diversification of raw materials and the economy of natural resources. This study evaluated the properties of mortars in fresh and hardened state, made with partial replacement of sand by waste EVA (Ethylene Vinyl Acetate). For this, mortars were prepared with substitution aggregate content 0%(reference), 5%, 10% and 15% by weight. The water / cement ratio for each trace has been empirically determined and maintained constant for the mortars with replacement. The results show that the mortars produced with EVA aggregate have lower water absorption and also a decrease in the mechanical strength. Thus, the production of mortar using EVA instead of natural aggregate is feasible, however, it is necessary to evaluate the minimum parameters for each application purpose. Thus, the work presents contribution to provide support for the mortar company managers or project managers make decisions about the insertion of EVA residue in the production of mortar.

Mechanical and morphological properties of modified halloysite nanotube filled ethylene-vinyl acetate copolymer nanocomposites

2018 ◽  
Vol 38 (3) ◽  
pp. 271-279 ◽  
Author(s):  
Suvendu Padhi ◽  
P. Ganga Raju Achary ◽  
Nimai C. Nayak
Keyword(s):  
Vinyl Acetate ◽  
Tensile Modulus ◽  
Ethylene Vinyl Acetate ◽  
Crosslinking Density ◽  
Weight Percent ◽  
Halloysite Nanotubes ◽  
Morphological Properties ◽  
Casting Method ◽  
Solution Casting Method ◽  
Acetate Copolymer

AbstractHalloysite nanotubes (HNTs) were modified by γ-methacryloxypropyltrimethoxysilane (γ-MPS) as it interacts with the aluminol and silanol groups of HNTs present at the edges and surfaces of HNTs. The polymer composites were prepared by means of the solution casting method with ethylene-vinyl acetate (EVA) copolymer having 45% vinyl acetate (VA) content with different weight percent of modified HNTs (m-HNTs). The modification of the HNTs by γ-MPS increases the interfacial and inter-tubular interactions and the degree of dispersion of the HNTs within the EVA matrix which manifest from increase in crosslinking density. The mechanical properties such as tensile strength, tensile modulus and tear strength of nanocomposites were found to increase because of m-HNT. The glass transition temperature (Tg) and the crystalline percentage decreases for EVA/m-HNT nanocomposites were due to the strong interaction between EVA matrix and filler. Also, the EVA/m-HNT nanocomposites exhibited better thermal stability due to the strong inter-tubular interaction.

scholarly journals Development of lightweight concrete subfloor with ethylene vinyl acetate (EVA) aggregates waste to reduce impact sound in flooring system

DYNA ◽  
2017 ◽  
Vol 84 (201) ◽  
pp. 290 ◽  
Author(s):  
Fernanda Pacheco ◽  
Marcelo Krumenauer ◽  
Daniel Reis de Medeiros ◽  
Maria Fernanda Nunes ◽  
Bernardo Fonseca Tutikian
Keyword(s):  
Vinyl Acetate ◽  
Lightweight Concrete ◽  
Ethylene Vinyl Acetate

Los requisitos de confort y habitabilidad visan la calidad de viviendas, afectada por los contrapisos. Así, este estudio objetiva diseñar losas de hormigón ligero con el uso de etileno-acetato de vinilo (EVA) como agregados en los contrapisos, sustituyendo agregados naturales El programa experimental está compuesto de cuatro mezclas, en que se modifica la relación entre los agregados grandes e pequeños de EVA y los naturales. Las losas de contrapiso tienen espesuras 3, 5 y 7 cm, la losa de 3 cm tuvo 1 cm adicional, con argamasa, simulando el acabamiento. Fueron realizados ensayos de masa específica y nivel de presión de sonido de impacto. Los resultados mostraron que a losa con 7cm y menor peso específico, presentó reducción de ruido de 17 dB, en comparación con aquellas de la misma espesura, con agregados naturales y menor contenido de EVA; y de 28 dB en relación a la losa de referencia.

scholarly journals Strength, micro-structure & durability investigations of lateritic concrete with palm kernel shell (PKS) as partial replacement of coarse aggregates

2020 ◽  
Vol 40 (2) ◽  
pp. 59-69
Author(s):  
Hussein Bello ◽  
Taiwo Salako ◽  
Suaib Tijani ◽  
Christopher Fapohunda
Keyword(s):  
Coarse Aggregate ◽  
Palm Kernel ◽  
Structural Performance ◽  
Partial Replacement ◽  
Micro Structure ◽  
Normal Concrete ◽  
Sem Images ◽  
Palm Kernel Shell ◽  
Aggregate Fraction ◽  
Coarse Aggregates

This paper presents the results of investigation conducted to evaluate structural performance of lateritic concrete containing palm kernel shell (PKS) as partial replacement of coarse aggregate by weight. The properties evaluated were: workability, density, compressive strength, microstructure, sorptivity, and water absorption of lateritic concrete with PKS specimens. The coarse aggregate fraction of the lateritic concrete was partially replaced with PKS of up to 50% at interval of 10% by weight. The results showed that: (i) the use of PKS to partially replace the coarse aggregate in lateritic concrete resulted in harsh concrete with low workabilities, (ii) lateritic concrete with PKS as partial replacement of coarse aggregate of up to 50% developed densities that can be used for normal concrete application, (iii) lateritic concrete with PKS as partial replacement of coarse aggregate of up to 10% developed strength that is comparable to the specimens without PKS, (iv) the SEM images of lateritic concrete samples showed a progressively porous internal structure with PKS and (v) lateritic concrete with PKS as partial replacement of coarse aggregate results in porous material but became less porous at longer curing ages. It can be concluded from these results that the replacement of the coarse aggregate constituent with PKS by weight not exceeding 10%, in the production of lateritic concrete, resulted in a material with satisfactory structural performance.

Bonding Strength of Expanded Polystyrene (EPS) Beads Enhanced with Steel Fiber in Reinforced Lightweight Concrete (LWC)

2014 ◽  
Vol 661 ◽  
pp. 100-105 ◽  
Author(s):  
Jamilah Abd. Rahim ◽  
Siti Hawa Hamzah ◽  
Mohd Saman Hamidah
Keyword(s):  
Aspect Ratio ◽  
Bonding Strength ◽  
Steel Fiber ◽  
Lightweight Concrete ◽  
Volume Fraction ◽  
Expanded Polystyrene ◽  
Normal Concrete ◽  
Pull Out ◽  
Concrete Mix ◽  
Reinforcement Bar

Lightweight concrete (LWC) is one of the favourable concrete to be used as it has low density with acceptable high strength, high durability, and toughness. In order to produce LWC, it is required special material such as expanded polystyrene (EPS) beads and steel fiber to be added into the design mix concrete. As known, EPS beads have zero strength. Meanwhile, the significant of steel fiber is to reduce micro and macro crack propagation. Therefore, pull out test were carried out to measure the bond strength between reinforcement bar and three series of concrete mix design which are normal concrete, EPS-LWC and EPS-LWC enhanced with steel fiber. Concrete adhesion and bearing deformation of reinforcing bar against the concrete are the two main mechanisms that influence the strength of bond in the steel reinforced concrete. Deformation will increase when the bonding stress increase. Normal concrete series shows the higher average bonding stress which is 531.22 kPa compared to others series concrete mix. Meanwhile, bonding stress of EPS-LWC mix is 174.54 kPa which is higher than EPS-LWC enhanced with steel fiber mix. Even though the present of the steel fibre can increase the strength of the LWC, but it effects to the bonding strength between reinforcement steel rod and concrete. There are two improtant factor in bonding determination which are volume fraction and aspect ratio of the steel fiber. Segregation will increase when the aspect ratio of steel fiber increased. Besides, the workability becomes low. This present study used types of hooked end steel fiber with 60 mm length and aspected ratio is 0.75. While the size of the cylindrical is 300 mm x 150 mm. The position of the steel fiber in the specimens is too compact and presenting the air voids. Consequently weaken the bonding strength between concrete and reinforcement bar.

scholarly journals Interlocking Pavement Tiles using RCA with Industrial Waste as Admixtures

2021 ◽  
Author(s):  
Anjana S ◽  
Diya Elizabeth Isaac ◽  
Neelanjana S ◽  
Aswathy G
Keyword(s):  
Fly Ash ◽  
Industrial Waste ◽  
Recycled Concrete ◽  
Partial Replacement ◽  
Normal Concrete ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates ◽  
Coarse Aggregates ◽  
Loss Of Strength ◽  
Enormous Quantity

The unprecedented increase in construction and developmental activities in the current era brings with it many irreversible impacts on the environment. The major impacts being the depletion of natural resources and generation of an enormous quantity of Construction and Demolition (C&D) wastes. Hence it has become important to reuse and recycle C & D wastes generated. These wastes can be processed to obtain Recycled Concrete Aggregates (RCA), which can be used for producing recycled concrete. It was found that the strength of Recycled concrete matches with that of paver quality concrete. Therefore, the study aims at producing interlocking paver blocks by replacing the normal coarse aggregates in pavers by RCA along with fly ash as admixture, an industrial waste. Fly ash being a pozzolanic admixture is used in order to overcome the loss of strength due to the addition of RCA. In the present study, a 30% replacement of normal aggregates with RCA and 15% replacement of cement with fly ash in the mix was used as it was found to provide the optimum strength. A comparison of the important properties of paver blocks were conducted between normal concrete pavers, pavers with RCA replacement and pavers with RCA replacement and fly ash. It was found out from the study that Interlocking pavers with partial replacement of normal aggregates with RCA and fly ash obtained strength comparable to that of normal paver blocks. Hence these paver blocks can be used for laying of roads and can contribute towards a sustainable development.

scholarly journals Effects of Partial Replacement of Coarse Aggregates with Reclaimed Rubber on the Mechanical Properties of Hardened Concrete

2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Kanmalai Williams ◽  
Eman Muhye Adeen Muhye Adeen Al-Hatali
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Partial Replacement ◽  
Hardened Concrete ◽  
Coarse Aggregates ◽  
Concrete Members ◽  
Tension Tests ◽  
Base Study ◽  
Concrete Mix ◽  
Maximum Compressive Strength

<p>The replacement of conventional aggregates with alternate materials like Reclaimed Rubber (RR) results in reduction of self-weight and compressive strength of concrete. This reduction in self-weight further decreases the dead load which contributes towards contraction in size of concrete members and reinforcement requirements. This diminution in compressive strength is compensated by replacing cement with supplementary materials like Silica Fume, Fly Ash or GGBS. This research focuses on the effects of partial replacement of cement and coarse aggregates with Silica Fume (SF) and Reclaimed Rubber (RR) respectively in the concrete mix. Concrete mix was prepared for M20 grade by replacing cement and coarse aggregates with SF and RR respectively for cube and cylinder samples. A base study has been carried out through compression and split tension tests by partially replacing cement with SF in 3 percent increments up to 24 percent. Maximum compressive strength of 19.6N/mm<sup>2</sup>, 24.2N/mm<sup>2</sup> and 32.5N/mm<sup>2</sup> was obtained at 12% replacement of cement with SF by weight while testing specimens after 7, 14 and 28 days of curing. Maximum strength of 2.4N/mm<sup>2</sup>, 2.9N/mm<sup>2</sup> and 3.1N/mm<sup>2</sup> was obtained during split tension tests conducted after 7, 14 and 28 days of curing period. Further compression and tension tests were conducted replacing cement with 12%SF along with various proportions of RR replacing coarse aggregates after different curing periods. Experiments reveal that a combination of 12%SF and 9%RR replacement produces maximum compressive strength of 19.2N/mm<sup>2</sup>, 23.1N/mm<sup>2</sup> and 29.4N/mm<sup>2</sup> after curing the samples for 7, 14 and 28 days respectively. The tensile strength decreases as the rubber content is increased in the concrete mix along with optimum SF when compared with normal mix.</p>

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