Prediction of compressive strength and elastic modulus of expanded polystyrene lightweight concrete

The precast concrete elements in the construction of buildings are increasingly used due to their better quality control, constructive speed, reduction of the number of workers and less waste of resources compared to conventional construction; for wall applications, to these advantages, the design to ensure thermal comfort requires the improvement of the low thermal insulation of conventional concrete panels. The use of materials with lower thermal conductivity such as Expanded PolyStyrene Beads (EPSB) in lightweight concrete for the construction of precast panels in housing, contributes to improve thermal insulation and the saving operational energy during its operation phase, because the aggregate has a small size, low density and thermal conductivity; applied in higher volumes in concrete, reduces indoor heat loss in cold climates and indoor heat gain in warm climates in housing. The purpose of this research is to study the behavior of lightweight concrete with EPSB for 16%, 26% and 36% addition and evaluate the air-dry density, compressive strength, thermal conductivity, relationship between air-dry density with compressive strength and thermal conductivity. The results indicate that the higher the percentage of EPSB the air-dry density, compressive strength and thermal conductivity decrease; the relationships between air-dry density with compressive strength and thermal conductivity follow a linear trend and are similar.

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STUDY OF REPLACEMENT OF SAND BY EXPANDED POLYSTYRENE IN STRUCTURAL LIGHTWEIGHT CONCRETE

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2017.94 ◽

2017 ◽

Vol 4 (1) ◽

Author(s):

Mateus Titon Tostes ◽

Daniel Hastenpflug

Keyword(s):

Compressive Strength ◽

Modulus Of Elasticity ◽

Lightweight Concrete ◽

Concrete Structures ◽

Expanded Polystyrene ◽

New Materials ◽

Medium Sand ◽

Structural Concrete

The search for more efficient concrete structures requires use of new materials in the developed of new concretes. With this objective, it was proposed in this study the substitution of Part of the medium sand of the lightweight structural concrete for expanded polystyrene (PS). It was replaced 5%, 10% and 20% of the sand to observe the changes in compressive strength, flowability, absorption, density and modulus of elasticity of these concretes. The results of the study show that there was an increase in the absorption and loss in the compressive strength and modulus of elasticity. Also, there was a significant increase in the flowability and reduction in the density of these concretes. Even with the replacement of part of the medium sand by expanded polystyrene, the concretes developed were classified as lightweight structural concretes, showing the applicability of this substitution in concrete designs.

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Effect of matrix particle size on EPS lightweight concrete properties

MATEC Web of Conferences ◽

10.1051/matecconf/201825101027 ◽

2018 ◽

Vol 251 ◽

pp. 01027

Author(s):

Duc Hoang Minh ◽

Ly Le Phuong

Keyword(s):

Particle Size ◽

Compressive Strength ◽

Lightweight Concrete ◽

Aggregate Size ◽

Expanded Polystyrene ◽

Coarse Aggregates ◽

Concrete Mixtures ◽

Maximum Particle Size ◽

The Matrix ◽

Maximum Particle

Expanded polystyrene lightweight concrete is a composite which can be made by adding expanded polystyrene aggregate in normalweight concrete (as matrix). The research was focused on the effect of properties and volume of the matrix on the properties of lightweight concrete. The results show that properties of structural polystyrene concrete, such as workability and compressive strength, depend on the aggregate size of the matrix. It also shows that decreasing aggregate size of the matrix is the effective way to increase workability and compressive strength of lightweight concrete. When the density of concretes decrease by 200 kg/m³, slump values decrease by about 20 to 30 mm with lightweight concrete mixtures using maximum particle size of 0.63 mm, while slump values decrease by about 40 mm with the mixtures using maximum particle size of 20 mm. At the same density, the compressive strength of the structural polystyrenre concrete significantly decreased when the coarse aggregate diameter greater than 10 mm. Therefore, coarse aggregates with diameter size are smaller than 10 mm was recommended to use for matrix. In the result, expanded polystyrene concrete with density from 1,400 kg/m³ to 2,000 kg/m³ and compressive strength more than 20 MPa for structural application was made.

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Influence of Lightweight Aggregates and GRP By-Product Powders on the Properties of Self-Compacting Concretes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.548.215 ◽

2012 ◽

Vol 548 ◽

pp. 215-220 ◽

Cited By ~ 3

Author(s):

Valeria Corinaldesi

Keyword(s):

Experimental Data ◽

Compressive Strength ◽

Elastic Modulus ◽

Lightweight Concrete ◽

Construction Material ◽

Specific Weight ◽

Artificial Light ◽

Coarse Aggregates ◽

Low Elastic Modulus ◽

Good Workability

Self-compacting lightweight concrete was developed to attain good workability, high compressive strength (at least 50 MPa), minimum cracks, and low specific weight (less than 2000 kg/m3), as well as low elastic modulus (about 30 GPa). The attention was also focused on sustainability of this construction material, which was improved by using in the mixture both GRP industrial by-product as filler and artificial (light expanded clay) or recycled (demolished concrete) as coarse aggregates replacing natural gravel. Satisfactory, if not excellent, results were obtained from the collected experimental data.

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Absorption Characteristics of Lightweight Concrete Containing Densified Polystyrene

Civil Engineering Journal ◽

10.28991/cej-2017-00000115 ◽

2017 ◽

Vol 3 (8) ◽

pp. 594-609 ◽

Cited By ~ 4

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.

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Compressive strength of lightweight expanded polystyrene basalt fiber concrete

MATEC Web of Conferences ◽

10.1051/matecconf/202032904010 ◽

2020 ◽

Vol 329 ◽

pp. 04010

Author(s):

Galina Okolnikova ◽

Lina Abass Saad ◽

Majeed M. Haidar ◽

Fouad adnan noman Abdullah Al-shaibani

Keyword(s):

Compressive Strength ◽

Lightweight Concrete ◽

Polypropylene Fiber ◽

Basalt Fiber ◽

Expanded Polystyrene ◽

Noticeable Effect ◽

Lower Weight ◽

Fiber Concrete ◽

Concrete Mix ◽

Research Show

The ability of concrete to give a lower weight and retain good properties for strength is very important concrete structures. Lightweight concrete is known for its brittleness hence the strengthening of the concrete with dispersed chopped fiber is necessary. The addition of dispersed chopped fiber in polystyrene concrete to check the effect of the fiber this concrete the main objective of this paper. The experimental method of research was used in this research paper after a proper review of previous works by other researchers were done. 42 grams of fiber were added in the concrete mix of each composition. The results of this research show a noticeable effect of fiber in the lightweight expanded polystyrene concrete. The concrete without fiber showed the best compressive strength followed by the concrete with dispersed polypropylene fiber.

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The Study of Mechanical Properties of Structural Lightweight Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.1620 ◽

2010 ◽

Vol 97-101 ◽

pp. 1620-1623 ◽

Cited By ~ 2

Author(s):

Hong Zhi Cui ◽

Feng Xing

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Elastic Modulus ◽

Bond Strength ◽

Modulus Of Elasticity ◽

Lightweight Concrete ◽

Experimental Studies ◽

Lightweight Aggregate ◽

Experimental Results ◽

The Relationship

Many investigations have been conducted on compressive strength of lightweight aggregate concretes (LWAC), but there are few experimental studies on the relationship between compressive strength, bond strength and elastic modulus of LWAC. In this paper, the specimens of twenty kinds of LWACs with different mix proportions were made. Properties of compressive strength, bond strength and modulus of elasticity of the LWACs were tested. Based on the testing resulting, equations for relationship between bond strength and compressive strength of the LWAC were established. For LWAC modulus of elasticity, the experimental results of this study can fit well with predicted equation of ACI 318

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Lightweight geopolymer composites as structural elements with improved insulation capacity

MATEC Web of Conferences ◽

10.1051/matecconf/201814901042 ◽

2018 ◽

Vol 149 ◽

pp. 01042 ◽

Cited By ~ 1

Author(s):

Glikeria Kakali ◽

Dimitris Kioupis ◽

Aggeliki Skaropoulou ◽

Sotiris Tsivilis

Keyword(s):

Thermal Conductivity ◽

Compressive Strength ◽

Lightweight Concrete ◽

Construction Materials ◽

Expanded Polystyrene ◽

Structural Elements ◽

Cement Mortars ◽

Mechanical Strengths ◽

Geopolymer Composites ◽

Excellent Stability

This study concerns the development of lightweight fly ash based geopolymers which can be applied as alternatives to the traditional lightweight concrete. Different kinds of expanded polystyrene were used as lightweight agents. The results showed that lightweight geopolymers were successfully prepared, exhibiting compressive strength and density in the range 7.70 – 29.57 MPa and 0.97 – 1.57 g/cm3, respectively. The product containing 3% w/w of commercial expanded polystyrene possesses low thermal conductivity (0.16 W/mK) combined with sufficient mechanical strengths (11 MPa), excellent stability and fire resistance while its water absorption is comparable to that of conventional construction materials (cement mortars, concrete).

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Lightweight concrete as covers on floating house platforms made from expanded polystyrene system (EPS) material

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/955/1/012012 ◽

2022 ◽

Vol 955 (1) ◽

pp. 012012

Author(s):

D B Cahyono ◽

H P Adi ◽

S I Wahyudi ◽

Pratikso

Keyword(s):

Compressive Strength ◽

Lightweight Concrete ◽

Coastal Areas ◽

Concrete Cover ◽

Expanded Polystyrene ◽

Research Use ◽

Concrete Compressive Strength ◽

Average Volume ◽

Volume Weight ◽

Concrete Materials

Abstract Floating houses can be utilized in coastal areas as they are equipped with platforms made from expanded polystyrene system (styrofoam) and lightweight concrete covers. A lightweight concrete cover on a floating house platform made from styrofoam can improve the feasibility of housing in terms of strength, comfort and cleanliness. This research aims to obtain mixture that meet the weight and compressive strength requirements of lightweight concrete and produce them as covers on floating houses platform. The compositions of lightweight concrete materials in this research use volume ratios of 1 Pc: 2 Sand: 3 Styrofoam, 1 Pc: 1.5 Sand: 2.5 Styrofoam and 1 Pc: 1.25 Sand: 2.75 Styrofoam. The research results show that the concrete made with styrofoam qualifies as lightweight concrete with average volume weight of concrete produced between 1000-1300 kg/m3. The lightest concrete weight (1097.88 kg/m3) could be obtained from variations of mixture of 1 Pc: 1.25 Sand: 2.75 Styrofoam, The highest concrete compressive strength results were obtained from the mixture of 1 Pc: 2 Sand: 3 Styrofoam (119.26 kg/cm2). The variations of concrete mixture of 1 Pc: 2 Sand: 3 Styrofoam can be considered as lightweight concrete (≤ 1900 kg/m3).

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The Effect of Reinforcement, Expanded Polystyrene (EPS) and The Effect of Reinforcement, Expanded Polystyrene (EPS) andThe Effect of Reinforcement, Expanded Polystyrene (EPS) and Fly Ash On The Strength of Foam Concrete

Journal of Civil Engineering Science and Technology ◽

10.33736/jcest.88.2011 ◽

2016 ◽

Vol 2 (2) ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Rosli M. F. ◽

Rashidi A. ◽

Ahmed E. ◽

Sarudu N. H

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Flexural Strength ◽

Lightweight Concrete ◽

Expanded Polystyrene ◽

Wire Mesh ◽

Replacement Level ◽

Foam Concrete ◽

Dead Load ◽

Mesh Reinforcement

Foam concrete is a type of lightweight concrete. The main characteristics of foam concrete are its low density and thermal conductivity. Its advantages are that there is a reduction of dead load, faster building rates in construction and lower haulage and handling costs. This research was conducted to investigate the compressive strength and flexural strength of reinforced foam concrete. The use of fly ash and Expanded Polystyrene (EPS) as cement and sand replacement were also included in the production of reinforced foam concrete. There were two types of reinforcements used to reinforce the foam concrete namely plastic and wire mesh. Physical failure mode, compressive strength and flexural strength of samples were compared and analyzed. The replacement percentages for both fly ash and EPS were varied between 0-50% and 0-40% respectively. The study showed that it is feasible to reinforce the foam concrete and the best result was obtained from wire mesh reinforcement. The study also showed that the optimum replacement level for both fly ash and EPS was 30% based on compressive and flexural strength results.

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