Efficient Eco-friendly Composite Fluorine Anhydrite-Based Materials

2017 ◽  
Author(s):  
Grigory Yakovlev ◽  
Jadvyga Keriene ◽  
Anastasiia Gordina ◽  
Irina Polyanskikh ◽  
Milan Bekmansurov
Keyword(s):  
Water Absorption ◽  
Lightweight Concrete ◽  
Gas Permeability ◽  
Average Density ◽  
Expanded Polystyrene ◽  
Environmental Load ◽  
Great Demand ◽  
Technogenic Waste ◽  
And Performance ◽  
Reduced Water

The paper presents possible ways of utilizing technogenic waste – fluorine anhydrite – by its use in production of dry mortars and piece goods from lightweight concrete with expanded polystyrene, as a organic filler, for low-rise construc-tion. The developed dry mortars are based on fluorine anhydrite binder and complex modifier comprising curing activator (sulfate or alkaline) and finely dispersed additive. The fluorine anhydrite-based compositions have improved physical and performance characteristics, including the improved strength and average density and reduced water absorption compared to the control composition. The developed lightweight anhydrite polystyrene concrete has the density grade of 700 kg/m3 and good vapor and gas permeability. The concrete is stabile while using and fire safe, because each granule of expanded poly-styrene is coated with anhydrite matrix, and has the strength sufficient for structural and heat insulating slabs and blocks. All mentioned compositions are eco-friendly and are in great demand for low-rise construction. Therefore the manufacturing of these compositions will consume a large amount of technogenic waste and will reduce the environmental load on the region where the waste is located.

scholarly journals Absorption Characteristics of Lightweight Concrete Containing Densified Polystyrene

2017 ◽  
Vol 3 (8) ◽  
pp. 594-609 ◽  
Author(s):  
Bengin Herki
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Construction Industry ◽  
Lightweight Concrete ◽  
Expanded Polystyrene ◽  
Partial Replacement ◽  
The Novel ◽  
Total Water ◽  
Capillary Water ◽  
Significant Difference

The environmental impacts of the construction industry can be minimised through using waste and recycled materials to replace natural resources. Results are presented of an experimental study concerning capillary transport of water in concrete incorporating densified expanded polystyrene (EPS) as a novel aggregate. A new environmentally friendly technique of densifying was used to improve the resistance to segregation of EPS beads in concrete. Twelve concrete mixes with three different water/cement ratios of 0.6, 0.8 and 1.0 with varying novel aggregate content ratios of 0, 30, 60 and 100% as partial replacement for natural aggregate by equivalent volume were prepared and tested. Total absorption, absorption by capillary action, and compressive strength was determined for the various concrete mixes at different curing times. The results indicated that there is an increase in total water absorption (WA) and capillary water absorption (CWA) and a decrease in compressive strength with increasing amounts of the novel aggregate in concrete. However, there is no significant difference between the CWA of control and concretes containing lower replacement level.

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.

Lightweight Concrete Incorporating Waste Expanded Polystyrene

2013 ◽  
Vol 787 ◽  
pp. 131-137 ◽  
Author(s):  
B.A. Herki ◽  
Jamal M. Khatib
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Lightweight Concrete ◽  
Lightweight Aggregate ◽  
Ultrasonic Pulse Velocity ◽  
Pulse Velocity ◽  
Expanded Polystyrene ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Waste Polystyrene

This paper covers the results of an experimental investigation on mechanical and durability properties of concrete containing waste polystyrene based lightweight aggregate called Stabilised Polystyrene (SPS) as a partial replacement of natural aggregates. The properties investigated in this paper were water absorption by capillary action and total absorption, compressive strength and ultrasonic pulse velocity (UPV). The composite aggregate was formed with 80% waste polystyrene which was shredded to different sizes, 10% of a natural additive to improve the resistance to segregation and 10% Portland cement. The natural fine aggregate were replaced with 0%, 30%, 60% and 100% (by volume) of SPS. There was an increasing in water absorption and a decreasing in compressive strength and UPV with the increase in SPS aggregate content in concrete.

Properties of Artificial Lightweight Aggregates (ALAs) Made of Dredged Soil Mixed with Waste Catalyst Slag

2012 ◽  
Vol 174-177 ◽  
pp. 1079-1085 ◽  
Author(s):  
Si Nae Jo ◽  
Yoo Tack Kim ◽  
Seung Gu Kang ◽  
Chang Sam Kim
Keyword(s):  
Specific Gravity ◽  
Water Absorption ◽  
Lightweight Concrete ◽  
Sintering Temperature ◽  
Thermal Power ◽  
Lightweight Aggregates ◽  
Dredged Soil ◽  
Porous Carriers ◽  
Black Core ◽  
Sintering Method

The artificial lightweight aggregates (ALAs) were manufactured using dredged soil produced at thermal power plant and waste catalyst slag by direct sintering method at 1050~1250°C for 10min. The ALAs of 100% dredged soil showed the black core phenomenon even at the low sintering temperature as 1050°C and become lightened by bloating pores in black core area with sintering temperature. On the other hand, the aggregates with 100% waste catalyst slag did not showed black coring and bloating phenomenon and had the low forming ability and many cracks inside. Adding the dredged soil to the waste catalyst slag decrease the specific gravity by promoting the black coring and bloating inside. The water absorption(%) of ALAs decreased with sintering temperature. The ALAs fabricated in this study showed the specific gravity of 0.8~2.0 and water absorption of 2~16% so it could be applied to various fields such as the lightweight concrete or the field of the porous carriers for purification of a contaminated soil or water.

scholarly journals Structural Use of Expanded Polystyrene Concrete

2020 ◽  
Vol 5 (6) ◽  
pp. 1131-1138
Author(s):  
Adeniran Jolaade ADEALA ◽  
Olugbenga Babajide SOYEM
Keyword(s):  
Environmental Pollution ◽  
Lightweight Concrete ◽  
Physical And Mechanical Properties ◽  
Consumer Products ◽  
Expanded Polystyrene ◽  
Engineering Properties ◽  
Partial Replacement ◽  
Construction Companies ◽  
Fine Aggregates ◽  
Concrete Matrix

Expanded polystyrene (EPS) wastes are generated from industries and post-consumer products. They are non-biodegradable but are usually disposed by burning or landfilling leading to environmental pollution. The possibility of using EPS as partial replacement for fine aggregates in concrete has generated research interests in recent times. However, since the physical and mechanical properties of EPS are not like those of conventional fine aggregates, this study is focussed on the use of EPS as an additive in concrete while keeping other composition (sand and granite) constant. Expanded polystyrene was milled, the bulk density of EPS was 10.57kg/m3 and particle size distributions were determined. Engineering properties of expanded polystyrene concrete were determined in accordance with BS 8110-2:1985. The result showed that the amount of expanded polystyrene incorporated in concrete influence the properties of hardened and fresh concrete. The compressive strengths of 17.07MPa with 5 % expanded polystyrene concrete at 28 days for example can be used as a lightweight concrete for partitioning in offices. Incorporating expanded polystyrene granules in a concrete matrix can produce lightweight polystyrene aggregate concrete of various densities, compressive strengths, flexural strengths and tensile strengths. In conclusion, this reduces environmental pollution, reduction in valuable landfill space and also for sustainability in construction companies

scholarly journals DEVELOPMENT OF LIGHTWEIGHT CONCRETE FROM EXPANDED CLAY MODIFIED WITH TIRE RUBBER WASTE

2021 ◽  
Author(s):  
Herbet Alves Oliveira
Keyword(s):  
Water Absorption ◽  
Lightweight Concrete ◽  
Experimental Program ◽  
Size Analysis ◽  
Mechanical Resistance ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Specific Mass ◽  
Tire Rubber ◽  
Rubber Waste

Lightweight concrete has as main characteristic its low density due to the incorporation of light materials such as expanded clay, or even the incorporation of air whose function is to reduce the density, characteristic of cellular concrete. In Aracaju city, there are companies that promote tire reconditioning, generating large amounts of waste dust. The aim of this work is to study the reuse of tire rubber waste in light concrete from expanded clay. An experimental program was developed for the analysis of these concretes, varying the percentage of 1%, 2.5% and 5% of the tire rubber waste to replace the natural fine aggregate and 100% replacing the natural coarse aggregate by expanded clay (50% of expanded clay C1506 and 50% of C2215). The materials (cement, sand, expanded clays and tire rubber waste) were characterized through tests of particle size analysis and unit mass. The hardened concrete was evaluated through mechanical tests of axial compression strength, modulus of elasticity and tensile strength by diametrical compression, physical tests of water absorption and specific mass, in addition to image analysis by scanning electron microscopy. The use of expanded clay with incorporation of 1% of tire rubber waste guaranteed better results in mechanical resistance, lower water absorption and greater specific mass than the mixtures with 2.5 and 5%, reaching values close to the reference concrete. Thus, the residue can be an alternative for reuse, avoiding disposal.

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