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 Utilization of Recycled Concrete Aggregates in Stone Mastic Asphalt Mixtures

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mohammad Saeed Pourtahmasb ◽  
Mohamed Rehan Karim
Keyword(s):  
Design Method ◽  
Recycled Concrete ◽  
Engineering Properties ◽  
Partial Replacement ◽  
Concrete Aggregate ◽  
Recycled Concrete Aggregates ◽  
Material Recycling ◽  
Mastic Asphalt ◽  
Fine Aggregates ◽  
Stone Mastic Asphalt

Recycled concrete aggregate (RCA) is considered as one of the largest wastes in the entire world which is produced by demolishing concrete structures such as buildings, bridges, and dams. It is the intention of scientists and researchers, as well as people in authority, to explore waste material recycling for environmental and economic advantages. The current paper presents an experimental research on the feasibility of reusing RCA in stone mastic asphalt (SMA) mixtures as a partial replacement of coarse and fine aggregates. The engineering properties of SMA mixtures containing RCA have been evaluated for different percentages of binders based on the Marshall mix design method. The outcomes were statistically analyzed using two-factor analysis of variance (ANOVA). Test results revealed that the performance of SMA mixtures is affected by RCA due to higher porosity and absorption of RCA in comparison with virgin granite aggregates. However, the engineering properties of SMA mixtures containing a particular amount of RCA showed the acceptable trends and could satisfy the standard requirements. Moreover, to achieve desirable performance characteristics, more caution should be made on properties of SMA mixtures containing RCA.

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.

scholarly journals Combined Effects of Bottom Ash and Expanded Polystyrene on Light-weight Concrete Properties

2018 ◽  
Vol 251 ◽  
pp. 01007 ◽  
Author(s):  
Lam Tang Van ◽  
Tho Vu Dinh ◽  
Dien Vu Kim ◽  
Boris Bulgakov ◽  
Olga Aleksandrova ◽  
...  
Keyword(s):  
High Performance Concrete ◽  
Bottom Ash ◽  
Expanded Polystyrene ◽  
Engineering Properties ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Light Weight ◽  
Combined Effects ◽  
Cement Ratio ◽  
Light Weight Concrete

The benefits of using waste materials as a partial replacement for cement in high performance concrete are also discussed. This paper presents the combined effects of bottom ash TPP “Vung Ang” and expanded polystyrene aggregate on different the properties of light-weight concrete. Twenty different concrete mixtures with a water to cement ratio of 0.4 and superplasticizer to cement ratio of 0.015 were used. On the one hand, the EPS was partially replaced with (0 ÷ 40)% by volume of concrete mixture. On the other hand, the fine aggregate was replaced with (0 ÷ 30)% by mass of BA TPP “Vung Ang”. The engineering properties, including workability, density and compressive strength of light-weight concrete were investigated at different curing times. The level of decrease in the strength depends upon the replacement level of EPS and BA. Specifically, the concrete containing 40% EPS and 30% BA at 28 days of age decrease in average density and strength were 43.2% and 26.4%, respectively, in comparison with the control concrete.

scholarly journals Experimental Study on Fracture Energy of Foam Concrete at Different Notch Depth

2018 ◽  
Vol 250 ◽  
pp. 03006
Author(s):  
Mohd Naqiuddin Zamri ◽  
Norashidah Abd Rahman ◽  
Zainorizuan Mohd Jaini ◽  
Zulaikha Ahmad ◽  
Siti Amirah Azra Khairuddin
Keyword(s):  
Mechanical Properties ◽  
Fracture Energy ◽  
Lightweight Concrete ◽  
Physical And Mechanical Properties ◽  
Engineering Properties ◽  
Notch Depth ◽  
Foam Concrete ◽  
Three Point Bending ◽  
Depth Ratio ◽  
Foamed Concrete

Foamed concrete is lightweight concrete formulated from a mixture of concrete mortar and established foam. Generally foamed concrete is known for its low engineering properties. Many researchers had conducted studies and more focused on the physical and mechanical properties of foamed concrete without taking into account the behavior on its fracture energy. Therefore, this study was carried out to investigate the effect of notch-to-depth ratio on fracture energy of foam concrete using three point bending testmethod. Beam specimens with V-notch were prepared at a densityof 1400kg/m3 and 1600kg/m3. Three different notch-to-depth ratios which were adopted at 0.1, 0.3 and 0.5. Fracture energy was determined using Hillerborg, Bazant and Comitee euro International du Beton (CEB) models. From the experimental results, it was shown that fracture energy decreases asthe notch-to-depth ratio increases.

scholarly journals Application of waste tyre rubber chips as coarse aggregate in concrete

2020 ◽  
Vol 30 (3) ◽  
pp. 328-334
Author(s):  
Z Muyen ◽  
F Mahmud ◽  
MN Hoque
Keyword(s):  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Physical And Mechanical Properties ◽  
Engineering Properties ◽  
Rubberized Concrete ◽  
Portland Cement Concrete ◽  
Lower Strength ◽  
Normal Concrete ◽  
Concrete Walls ◽  
Waste Tyre

The practicality and the engineering properties of portland cement concrete (PCC) and three types of rubberized PCC mixes prepared by partially replacing the conventional coarse aggregate with rubber were examined. The rubberized PCC mixes contained 5%, 10% and 15% waste tyre rubber chips as replacement of conventional coarse aggregate. Different physical and mechanical properties of the control (0% rubber chips) and the rubberized concrete samples were determined. A 5% replacement of conventional aggregates resulted in a 5% reduction of compressive strength, a 10% replacement resulted in a 26% reduction and a 15% replacement resulted in a reduction of 47%. A 5% replacement of conventional aggregates resulted in a 6% reduction of tensile strength, a 10% replacement resulted in a 33% reduction and a 15% replacement resulted in a reduction of 53%. A 5% replacement of conventional aggregates resulted in a 13% reduction of flexural strength, a 10% replacement resulted in a 33% reduction and a 15% replacement resulted in a reduction of 42%. Although concrete made from tyres had lower strength than the normal concrete, rubberized concrete can find its use in landscaping, sports field ground, architectural finishing, lightweight concrete walls etc. Progressive Agriculture 30 (3): 328-334, 2019

scholarly journals Performance of Sand-Crushed Oyster Shells Blended Fine Aggregates in Concrete: Waste Management Perspective in Nigeria

2021 ◽  
Vol 40 (1) ◽  
pp. 13-18
Author(s):  
O.A. Ubachukwu ◽  
F.O. Okafor ◽  
K.B. Nwokoukwu ◽  
K.P. Esochaghi
Keyword(s):  
Compressive Strength ◽  
Environmental Degradation ◽  
Niger Delta ◽  
Partial Replacement ◽  
Niger Delta Region ◽  
Curing Period ◽  
Fine Aggregates ◽  
Management Perspective ◽  
Indiscriminate Disposal ◽  
Concrete Matrix

Pollution of our environment with wastes and the associated harm to our ecosystem and health is of great concern globally. In addition, the unabated mining of sharp sand for concrete with environmental degradation arising therefrom is worrisome. In the Niger Delta region of Nigeria, enormous quantities of oyster shells are being littered along the streets, riverbanks and landfills, after eating the fleshy part as meat. As a means of managing the waste and conserving sand, this study examines the properties of concrete made, using crushed oyster shells (COS) as partial replacement of sand. Sand was partially replaced in concrete with COS at the rate of 0, 5, 10, 15, 20 and 25%. The concrete matrix was cast in a metal cube mold of 150mm3 and cured for 3, 7, 14 and 28 days. A total of 72 cubes were cast in three replicates for each replacement level and each curing period, using a standard mix of 1:2:4 and water-cement ratio of 0.5. The results reveal that the addition of COS reduces the slump of the fresh concrete from 27 mm at 0% to 20 mm at 25%. The addition of COS up to 25% reduced the density of the concrete by 4.05%. The compressive strength slightly reduced as the percentage replacement increased from 0 to 25%. The findings recommend replacement not exceeding 15% that has true slump of 23.5 mm, lighter density of 25.17 kg/m−3 and compressive strength of 26.2 Nmm−2 which are good for concrete works. When sand is partially replaced with COS in concrete, we can confront the environmental degradation arising from indiscriminate disposal of oyster shells, as well as the depletion of sand as non-renewable component of concrete.

The Lightweight Porous Fine Aggregate Composite Based on Secondary Raw Materials

2019 ◽  
Vol 799 ◽  
pp. 153-158
Author(s):  
Dainius Leonavičius ◽  
Ina Pundienė ◽  
Modestas Kligys ◽  
Jolanta Pranckevičienė
Keyword(s):  
Cement Paste ◽  
Thermal Conductivity Coefficient ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Expanded Polystyrene ◽  
Dry Density ◽  
Fine Aggregate ◽  
Fine Aggregates ◽  
Glass Aggregate ◽  
Foamed Glass

The main objective of this study was to carry out more detailed research on the effects of the amount of cement paste on the physical and mechanical properties of porous fine aggregate concrete (PFAC). Fine foamed glass aggregate (prepared of local glass breaks) and crushed expanded polystyrene aggregate (prepared of local packing tare of household equipment), ordinary Portland cement (OPC), plasticizing and air entraining admixtures, as well as pozzolanic additive – metakaolin-based waste (local waste in production process of foamed glass aggregate), were used for the preparation of forming mixtures. Fine aggregates were coated by an extremely thin layer of porous cement paste in the samples with the lowest amount of OPC (70 kg/m3), and the aggregates contact with each other mainly at the points (empty spaces between the aggregates are interconnected between each other). There were no empty spaces between the aggregates observed, and porous cement paste seems to be monolithic in the samples with the highest amount of OPC (370 kg/m3). Increased amount of OPC (from 70 to 370 kg/m3) results in denser structure, increased dry density, compressive strength, thermal conductivity coefficient and decreased water absorption of the samples.

scholarly journals Investigation on Workability Of M20 Grade Concrete With Partial Replacement Of Crumb Rubber And M Sand For Fine Aggregates And Flyash For Cement

2020 ◽  
Vol 184 ◽  
pp. 01098
Author(s):  
P.Santhi Raj ◽  
G.V.V. Satyanarayana ◽  
M. Sriharshavarma
Keyword(s):  
Fly Ash ◽  
Environmental Pollution ◽  
Industrial Waste ◽  
Crumb Rubber ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Normal Concrete ◽  
Fine Aggregates ◽  
The Us ◽  
Entire World

Concrete has a key role in construction. Study focus on workability of the concrete, Fine Aggregate is partially filled with crumb rubber and M sand, a part of cement is replaced with fly ash. In this investigation the crumb rubber is utilised in place of fine aggregate. The scrap tyre treatment is currently a serious issue against environmental pollution. India stud in forth position in the entire world for rubber tyre market world after china, Europe and the US. Fly ash and M sand is an industrial waste which is included in the concrete. In this investigation workability of concrete is conducted on M20 grade concrete by replacing river side sand with the M sand and crumb rubber at percentage of replacements 0 to 20% at an regular interval of 5%and Compare the results obtained by the modified concrete with the normal concrete.

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