scholarly journals Recovery and Incorporation of expanded polystyrene SolidWaste in Lightweight Concrete

Ingeniería ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 237-249
Author(s):  
María Paula Espinoza-Merchán ◽  
Laura Juliana Torres-Parra ◽  
Nicolas Rojas-Arias ◽  
Pablo Miguel Coha-Vesga
Keyword(s):  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Expanded Polystyrene ◽  
Raw Material ◽  
Low Density ◽  
Chemical Attack ◽  
High Consumption ◽  
Chemical Agents ◽  
Concrete Failure ◽  
Attack Process

Context: The high consumption of parts made from expanded polystyrene (EPS) generates environmental problems when disposed. Due to its low density and the low possibility of being utilized in other applications after its disposal, it is necessary to generate an alternative for the recovery and application of this type of waste. This work aims to generate an alternative in the application of EPS waste, particularly as a coarse aggregate in the manufacturing of lightweight concrete. Method: This study used discarded EPS containers as raw material. The material was cleaned, crushed and subsequently reduced in volume by applying acetone, generating pieces of polystyrene (R-PS) to be applied as a coarse aggregate for the manufacturing of lightweight concrete in different proportions. In addition, the pieces were subjected to a chemical attack process in order to observe their behavior. Results: The results show the degree of volume reduction of the EPS pieces by using different acetone ratios, establishing the best degree of reduction (in volume) of this material. Likewise, chemical attack tests show the behavior of R-PS against different agents in R-PS samples. Meanwhile, the failure tests on different concrete samples determine the best R-PS ratio as coarse aggregate for the manufacturing of lightweight concrete. Conclusions: The data obtained in this study show that the application of acetone on EPSW samples reduces its volume by up to 55 %. Concrete failure tests show that an optimum P-RS addition value, to be used as an aggregate in the manufacturing of lightweight concrete, is 7 %. This improves its resistance to chemical agents and weight reduction without significantly reducing the mechanical properties of concrete.

scholarly journals Structural Performance of Steel Fibre Reinforced Lightweight Concrete Frames Subjected to Lateral Load

2019 ◽  
Vol 9 (2S2) ◽  
pp. 34-37 ◽  
Keyword(s):  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Low Density ◽  
Concrete Frames ◽  
Structural Behaviour ◽  
Displacement Ductility ◽  
Steel Fibres ◽  
Rc Frames ◽  
Lateral Forces ◽  
Volcanic Source

Masonry infilled Reinforced Concrete (RC) framed structure is the utmost common kind of building in which, RC frames contribute in resisting lateral forces. Due to heavy mass and rigid construction, the RC framed buildings performs unfortunate under lateral forces. Practice of Lightweight concrete (LWC) is superlative because the dead load of concrete is massive. Low density materials are chosen in LWC, reduces the mass of the building thus decreasing the influence of lateral forces. However, LWC having a lesser modulus of elasticity has a more rapidly develops the cracks in the RC members. In this investigation, pumice is a naturally available material of volcanic source, has low density, which creates it ideal for production of LWC, likewise steel fibres are employed as an additive to enhance the energy absorption ability and to reduce the possibility of development of the cracks. In the present paper the structural behaviour of Lightweight RC framed structures realized by using steel fibres and subjected to lateral forces, In this study, four RC frames viz., F1-NWC (Control), F2- NWCF (with 1% Vf of steel fibres), F3-LWC (with 20% substitute of coarse aggregate instead of pumice aggregate) and F4-LWCF (with 20% substitute of coarse aggregate instead of pumice aggregate and 1% Vf of steel fibres) were casted and tested under in-plane horizontal loading, which are designed according to Indian Standard (IS) code IS 456 (2000). It was observed that the behaviour of F4-LWCF significantly better in comparison to other frames in various parameters such as load carrying capacity, displacement, ductility, stiffness and energy dissipation.

scholarly journals EXPERIMENTAL INVESTIGATION ON LWC WITH COMPLETE REPLACEMENT OF COURSE AGGREGATE BY EPS BEADS

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Natalija Bede ◽  
Neira Torić Malić
Keyword(s):  
Experimental Investigation ◽  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Expanded Polystyrene ◽  
Hardened Concrete ◽  
Test Results ◽  
Mixture Proportioning ◽  
Complete Replacement ◽  
Total Replacement ◽  
Mix Proportion

In this paper, expanded polystyrene (EPS) lightweight concrete (LWC) was investigated. The mainaim was to design EPS LWC with the specified density of 1200 kg/m3 according to standard concretemix proportion. Mix proportion included total replacement of the conventional coarse aggregate bymaximum possible amount of EPS beads, which ensures concrete workability and prescribeddensity. The results demonstrated that exactly defined mixture-proportioning and casting procedureare required to achieve designed density. For designed EPS LWC mixture properties of freshlymixedconcrete and hardened concrete were analyzed. Based on test results it is concluded thatdesigned EPS LWC can be used for structural-insulating purpose such as floors and roofs.

scholarly journals Review of materials used in Low density concrete as Eco-friendly

2021 ◽  
Vol 1197 (1) ◽  
pp. 012076
Author(s):  
U.V. Koteswara Rao ◽  
Veerendrakumar C Khed
Keyword(s):  
High Performance ◽  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Agricultural Waste ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Low Density ◽  
Steel Fibres ◽  
Materials Used ◽  
Extra Weight

Abstract Lightweight concrete is the most popular type in constructional activities to get low density for the concrete just as to diminish the extra weight of the structure. There are different types of lightweight concrete based on the type of lightweight material used. As considering eco-friendly materials like waste tires, waste steel fibres, plastic waste, agricultural waste, waste glass can be utilized in concrete by replacing coarse aggregate and fine aggregate. Lightweight concrete is preferable in constructional activities because of its low warm conductivity and improves fire resistance. In general, lightweight concrete ranges from 1440 to 1840 kg/m3. The main aim is to conclude the high-performance lightweight concrete by using a different type of materials in the same way to achieve low density for the concrete. By this study, we understand that high performance can be achieved by adding steel fibres to improve ductility and for low-density waste tire rubber by partial replacement in coarse aggregate and to improve durability by adding bacillus subtilis JC3 crack formation can be reduced.

Estudo Comparativo Entre o Concreto Leve de PET e o Concreto Leve de EPS

2018 ◽  
Vol 13 (13) ◽  
pp. 23
Author(s):  
Dieison De Souza Lima ◽  
Emily Do Amaral ◽  
Kauana Gabriela Rocha De Lima ◽  
Rafael Capellari Fumegali ◽  
Thiago Dias Do Espírito Santo
Keyword(s):  
Water Absorption ◽  
Solid Waste ◽  
Lightweight Concrete ◽  
Phase 1 ◽  
Expanded Polystyrene ◽  
Raw Material ◽  
Phase 2 ◽  
Adverse Conditions ◽  
The Third ◽  
Plastic Containers

A geração de grandes volumes de resíduos sólidos tem sido um dos maiores problemas ambientais encontrados na atualidade e certamente o mais preocupante. Com o descarte inadequado de certos materiais, muita matéria-prima deixa de ser reaproveitada, como as embalagens plásticas pós-consumo de Politereftalato de Etileno – PET, um produto capaz de sobreviver mais de cem anos em condições adversas no meio ambiente. Deste modo, com o intuito de reciclar as embalagens de PET e ao mesmo tempo empregá-las na construção civil, foram realizados ensaios de concreto utilizando o PET como matéria-prima na fabricação de concreto leve, comparando suas características com traços de concretos leves tradicionais confeccionados com Poliestireno Expandido – EPS, conhecido como isopor. Foram fabricados na Fase 1, corpos de prova dos traços de concreto com EPS para avaliar os parâmetros iniciais, os métodos de dosagem e a definição do traço referência. Com o traço referência definido foi fabricado um concreto leve apenas com PET buscando obter características similares ao do traço com EPS. Na Fase 2, foram fabricados a partir do traço referência quatro tipos de concreto leve, o primeiro com PET, o segundo de PET com aditivo Bianco, buscando melhor aderência entre a argamassa e o PET, o terceiro com EPS e o quarto de EPS com aditivo Bianco. As amostras foram caracterizadas pelos ensaios de compressão, densidade e absorção de água. Com os resultados pode-se perceber que os comportamentos dos traços de concreto leves se assemelham visualmente, diferenciando apenas em seus pesos e resistências à compressão. Palavras-chave: Concreto Leve. EPS. Isopor. PET. AbstractThe generation of large volumes of solid waste has been one of the biggest environmental problems found nowadays and certainly the most worrisome. With the inadequate disposal of certain materials, much of the raw material is no longer reused, such as the post-consumer plastic containers of Polyethylene Terephthalate (PET), a product capable of surviving more than 100 years in adverse conditions in the environment. Therefore, in order to recycle PET containers and at the same time to use them in construction, concrete tests were carried out using PET as a raw material in the manufacture of lightweight concrete, comparing its characteristics with traditional lightweight concrete formula made with Expanded Polystyrene - EPS, known as Styrofoam. Phase 1 concrete test specimens with EPS were produced to evaluate the initial parameters, the dosing methods and the reference concrete formula. With the reference concrete formula defined, a lightweight concrete was fabricated with PET only to obtain similar characteristics to the concrete formula with EPS. In Phase 2, four types of lightweight concrete were manufactured from the reference concrete formula, the first with PET, the second from PET with Bianco additive, seeking better adhesion between the mortar and the PET, the third with EPS and the fourth EPS with additive Bianco. The samples were characterized by compression, density and water absorption tests. With the results it can be seen that the behavior of the lightweight concrete formula resembles visually, differentiating only in their weights and resistance to compression. Keywords: Lightweight Concrete. EPS. Styrofoam. PET.

scholarly journals The effect of bagasse fibers material with pumice as a partial substitution of coarse aggregate to increase compressive strength and tensile strength on lightweight concrete

2021 ◽  
Vol 878 (1) ◽  
pp. 012046
Author(s):  
F Samosir ◽  
L E Hutabarat ◽  
C C Purnomo ◽  
S P Tampubolon
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Sugarcane Bagasse ◽  
Sugar Cane ◽  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Fiber Material ◽  
Raw Material ◽  
Partial Substitution ◽  
Sugarcane Bagasse Ash

Abstract Based on data from the Indonesian Sugar Plantation Research Center (P3GI) bagasse produced 32% of the weight of ground sugar cane. Data obtained from the Indonesian Sugar Expert Association (IKAGI) shows the number of sugar cane milled by 57 sugar mills in Indonesia reaches around 30 million tons, so the bagasse produced is estimated to reach 9,640,000 tons. However, as much as 60% of the sugarcane bagasse ash is used by sugar factories as fuel, raw material for paper and others. Therefore, it is estimated that 40% of the sugarcane bagasse ash has not been utilized. In this research sugarcane bagasse used as fiber material with using pumice partial substitutions for coarse aggregate to increase compressive strength and tensile strength of lightweight concrete. The test is conducted on specimens with a diameter of 15 cm and a height of 30 cm at the age of 28 days. Result of test shows lightweight concrete with 0.25% sugarcane bagasse reach optimum compressive strength at 13.74 MPa, compare to 12.83 MPa without sugarcane bagasse; 13.40 MPa with 0.5% sugarcane bagasse, and 11.61 MPa with 1% sugarcane bagasse. Furthermore, the results of the tensile strength test show a significant increase up to 0.25% bagasse fibers reach 1.81 MPa, compare to 1.51 MPa without sugarcane bagasse; 1.72 MPa with 0.5%; and 1.56 MPa with 1% sugarcane bagasse.

scholarly journals Structural Behaviour of Lightweight RC Frames contains Fibres subjected to Lateral Loading

2019 ◽  
Vol 8 (6) ◽  
pp. 2640-2643 ◽  
Keyword(s):  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Volume Fraction ◽  
Low Density ◽  
Structural Behaviour ◽  
Displacement Ductility ◽  
Steel Fibres ◽  
Rc Frames ◽  
Lateral Forces ◽  
Volcanic Source

Masonry infilled Reinforced Concrete (RC) framed structure is the utmost common kind of building in which, RC frames contribute in resisting lateral forces. Due to heavy mass and rigid construction, the RC framed buildings performs unfortunate under lateral forces. Practice of Lightweight concrete (LWC) is superlative because the dead load of concrete is massive. Low density materials are chosen in LWC, reduces the mass of the building thus decreasing the influence of lateral forces. However, LWC having a lesser modulus of elasticity has a more rapidly develops the cracks in the RC members. In this investigation, pumice is a naturally available material of volcanic source, has low density, which creates it ideal for production of LWC, likewise steel fibres are employed as an additive to enhance the energy absorption ability and to reduce the possibility of development of the cracks. In the present paper the structural behaviour of Lightweight RC framed structures realized by using steel fibres and subjected to lateral forces, In this study, four RC frames viz., F1-NWC (Control), F2- NWCF (with 1% Volume fraction (Vf) of steel fibres), F3-LWC (with 20% substitute of coarse aggregate instead of pumice aggregate) and F4-LWCF (with 20% substitute of coarse aggregate instead of pumice aggregate and 1% Vf of steel fibres) were casted and tested under in-plane horizontal loading, which are designed according to Indian Standard (IS) code IS 456 (2000). It was observed that the behaviour of F4-LWCF significantly better in comparison to other frames in various parameters such as load carrying capacity, displacement, ductility, stiffness and energy dissipation.

Comparative Study on Mechanical Strength Properties of Concrete by Using Demolished Concrete Waste

2019 ◽  
Vol 1 (6) ◽  
pp. 235-239
Author(s):  
Sabarinathan K ◽  
Ashwathi R
Keyword(s):  
Comparative Study ◽  
Mechanical Strength ◽  
Coarse Aggregate ◽  
Environmental Awareness ◽  
Strength Properties ◽  
Raw Material ◽  
Construction Waste ◽  
The World ◽  
Day By Day

The growing environmental awareness and Construction waste, is increasing day by day which in turn makes the world in seeking for examining the characteristics of Construction waste and obtaining a solution by using its reliable segments such that it can be used as a raw material and Conservation the natural recourses like Coarse aggregate

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