Expanded Polystyrene Wall and Conventional Concrete Wall Sustainability Issues in Housing

2021 ◽  
pp. 200-207
Author(s):  
Lateef Adewole Adegboyega ◽  
Rita Yi Man Li
Keyword(s):  
Expanded Polystyrene ◽  
Concrete Wall ◽  
Conventional Concrete

scholarly journals Heat Transfer Dynamic Analyses for Recycled-Concrete Wall Combined with Expanded Polystyrene Template

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Jianhua Li ◽  
Wenjing Chen
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Calculation Method ◽  
Research Work ◽  
Shear Wall ◽  
Climatic Conditions ◽  
Expanded Polystyrene ◽  
Recycled Concrete ◽  
Concrete Wall ◽  
Ordinary Concrete

Due to the benefits of pollution reduction, energy saving, and recycling of resources associated with the recycled concrete, together with the apparent thermal storage thermal insulation yield of expandable polystyrene (EPS) template, the heat transfer dynamics of their combination has become a contemporary study topic. In this research work, an investigation of the heat transfer coefficient (U) of EPS template recycled-concrete shear wall has been carried out. Four different concrete mixtures shear wall samples having different insulation types were developed for the purpose of quantifying their thermal outputs. Both temperature (T) and humidity (H) affection to thermal conductivity coefficient (λ) of reinforced concrete and the EPS template were investigated, correspondingly. The λ0°C (relative variation for a 0°C of temperature variation in T) of cement mortar, recycled-concrete shear wall, and ordinary concrete shear wall were measured being 0.7526, 1.2463, and 1.3750 W·m−1·K−1, respectively. And the λ calculation of EPS was carried out being 0.0396 W·m−1·K−1. A corrected calculation method was put forward to application in practical work that could reflect the real U value in a more precise manner. These results brought to light the fact that the heat preservation output of recycled-concrete shear wall posed to be comparatively more improved than that of ordinary concrete shear wall. We put forth the suggestion for the use of corrected calculation method in the calculation and analysis of U of EPS template recycled-concrete composite shear wall in the climatic conditions of Beijing. The results revealed the fact that the U of EPS template recycled-concrete shear wall was dominantly controlled by the change of thermal conductivity changes of EPS template. The monthly mean U increased with increasing Tout and decreased with decreasing Tout. The smaller the U of the enclosure wall was, the better the thermal stability of the wall was experienced.

scholarly journals Study on sliding stability of porous-concrete retaining wall model test subjected to rainfall infiltration

2021 ◽  
Vol 930 (1) ◽  
pp. 012101
Author(s):  
E A Suryo ◽  
E Arifi ◽  
Y Zaika
Keyword(s):  
Retaining Wall ◽  
Lateral Load ◽  
Annual Rainfall ◽  
Wall Material ◽  
Concrete Wall ◽  
Loading Test ◽  
Wall Model ◽  
Conventional Concrete ◽  
Concrete Walls ◽  
Porous Concrete

Abstract The common disadvantage of a conventional retaining wall is a heavy object as a block that is difficult to lift and handle conveniently. A drainage pipe is commonly used to displace water from the backfill. In areas with high annual rainfall, the soil could be saturated in a short time and added lateral load significantly. In this study, porous concrete was utilized as a retaining wall material with the advantages of the lighter weight of the block and additional drainage capability due to its high void ratio. A set of a laboratory-scale retaining walls using conventional and porous concrete walls was investigated through three different rainfall modes. To initiate the instability condition, a vertical load was applied then the lateral moving was recorded using LVDT sensors. Soil moisture content sensors recorded hydrologic responses of the saturation process. The loading test results showed that the porous concrete wall model was being displaced less than experienced by the conventional concrete wall. It shows that the porous concrete wall model can withstand the load as the additional lateral load from infiltrated rainwater dissipates rapidly. Therefore, the porous concrete wall has the advantage of being used as a Retaining Wall Material.

Lightweight Concrete Precast Panels for the Improvement of Thermal Insulation of Housing with Expanded Polystyrene Beads

2021 ◽  
Vol 1033 ◽  
pp. 163-171
Author(s):  
Alexandra Reto ◽  
Renzo Sanabria ◽  
José Rodriguez ◽  
Alexandra Hinostroza
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Thermal Insulation ◽  
Lightweight Concrete ◽  
Linear Trend ◽  
Precast Concrete ◽  
Expanded Polystyrene ◽  
Dry Density ◽  
Conventional Concrete ◽  
Polystyrene Beads

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.

scholarly journals APLIKASI VALUE ENGINEERING PADA RUMAH TINGGAL TIPE 90/180, 135/180, DAN 223/253 DI PERUMAHAN BLIMBING PERMAI KOTA MALANG

2015 ◽  
Vol 9 (1) ◽  
pp. 15
Author(s):  
Haris Asta Pradana, Sumardi, Udi Subagyo
Keyword(s):  
Function Analysis ◽  
Concrete Slab ◽  
Value Engineering ◽  
Analysis Method ◽  
Chronological Order ◽  
Concrete Wall ◽  
Conventional Concrete ◽  
Pareto Analysis ◽  
Several Variables ◽  
And Function

The application of value engineering to Blimbing Permai Residence (BPR) aimed to sistematically organize and apply a technique that identifies the product to meet the required function at the lowest price. It was applied to houses of 90/180, 135/180, and 223/253 at BPR without lowering the price. Pareto and function analysis method were employed to analize some phases of work plan to result in some more objective alternatives based on several variables. Both methodes result in breakdown cost in a chronological order of the highest itemized work cost to the lowest one. The analyses result in some work items possibly to replace, they are of wall, roof, truss, and concrete slab works of 90/180 type; masonry, truss, and roff tiling of 135/180 type; concrete, wall and roofing of 225/253 type. The Value Engineering result in hebel bricks to replace conventional ones; ceramic concrete slab to replace conventional concrete one ; light galvanic to replace wooden truss ; granite tile to replace marble ones. Its a result type 90/180 is more economical at IDR.250,292,433.03 or 10.5 % of the existing IDR.276,591,438.78. The type 135/180 is more economical at IDR.346,840,945.04 or 11.07 % of the existing IDR.385,047,844.51. At last of type 223/253 is more economical at IDR.595,156,885.77 or 17.08 % of the existing IDR.667,232,563.47.Keywords: breakdown cost, function analysis, Pareto Analysis, value engineering

scholarly journals Seismic Performance Evaluation of a Proposed Buckling-Restrained Brace for RC-MRFS

2019 ◽  
Vol 29 (3) ◽  
pp. 164-173
Author(s):  
Arunraj Ebanesar ◽  
Daniel Cruze ◽  
Ehsan Noroozinejad Farsangi ◽  
Vincent Sam Jebadurai Seenivasan ◽  
Adil Dar Mohammad ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Inner Core ◽  
Numerical Study ◽  
Construction Material ◽  
Time History ◽  
Expanded Polystyrene ◽  
Disaster Mitigation ◽  
Ductile Material ◽  
Conventional Concrete ◽  
Buckling Restrained Brace

Abstract This paper presents a novel buckling-restrained brace (BRB) where the inner core is restrained by a concrete infilled Expanded Polystyrene Sheet (EPS) instead of the conventional concrete infilled tube section, to resist inner core buckling. It serves two purposes, firstly, the EPS is a ductile material, which is favourable in terms of seismic performance and, secondly, the outer construction material has better corrosion resistance. Thus, the life of the steel core can be prolonged. In this study, 6 BRB specimens were prepared, of which 3 BRB specimens were infilled with concrete and the remaining 3 BRB specimens with concrete and EPSs, in order to study their performance under cyclic loading. Three different core heights, all with the same core thickness, were adopted. The test results indicate that the load-carrying capacity of this novel BRB is higher than the conventional BRB. Further, the length of the steel tube also affects the strength of the seismic disaster mitigation system. Lastly, a numerical study on a single bay RC frame, with and without BRB subjected to time history analysis, was conducted to check the global performance of this novel system. It was found that the structural responses had substantially decreased.

BUCKLING OF STEEL FIBRE EXPANDED POLYSTYRENE CONCRETE WALL PANEL

2015 ◽  
Vol 76 (10) ◽  
Author(s):  
Rohana Mamat ◽  
Siti Hawa Hamzah ◽  
Jamilah Abd. Rahim
Keyword(s):  
Steel Fibre ◽  
Lightweight Concrete ◽  
Slenderness Ratio ◽  
Expanded Polystyrene ◽  
Sustained Load ◽  
Wall Panel ◽  
Concrete Wall ◽  
Maximum Displacement ◽  
Load Bearing ◽  
Wall Panels

Steel Fibre Expanded Polystyrene Concrete (SFEPS) wall panel is envisaged as load bearing walls, although it is lightweight by design. The performance of this wall is investigated, incorporating opening to fulfil the demand for ventilation and services conduits or equipments. It focused on the buckling behaviour by comparing the carrying load capacities and deformation profiles of wall panel with and without opening. Primarily, the samples were cast from concrete mixed with expanded polystyrene (EPS) beads, enhanced with hooked end round shaft steel fibre and reinforced with a single layer rectangular steel fabric (BRC) of size B9. The wall panel size is 2000 mm in height (limited due to testing frame allowable height), 1500 mm wide and 100 mm thick which gives the slenderness ratio of 15. The wall falls under the slender wall category for lightweight concrete since the slenderness ratio is greater than 10 [1]. A central opening with a size of 600 mm high by 600 mm wide is created to accommodate the opening criterion. Experimental tests were conducted simulating fixed ends condition. The average compressive strength of SFEPS, fcu is 20.87 N/mm2 with a density, ρ of 1900 kg/m3. These lightweight SFEPS wall panels sustained load between 958.0 kN and 1938.9 kN. Wall panels experienced maximum displacement of 22.3 mm at midheight. The wall panels failed in buckling as it should be for slender wall. There was also concrete crushing at the upper and lower ends of the panels. The SFEPS wall panel is suitable to be used as load bearing structures.

Shear Reinforcing Influence of GFRP Shear Connectors in the Concrete Sandwich Wall Panel (CSWP) for Exterior Envelopes of Buildings

2013 ◽  
Vol 658 ◽  
pp. 38-41 ◽  
Author(s):  
Tae Sik Oh ◽  
Seok Joon Jang ◽  
Hyun Do Yun
Keyword(s):  
Shear Behavior ◽  
Expanded Polystyrene ◽  
Shear Connector ◽  
Concrete Wall ◽  
Shear Connectors ◽  
Pull Out ◽  
Glass Fiber Reinforced ◽  
Sandwich Wall ◽  
Sandwich Wall Panel ◽  
Thermal Insulations

This paper summarizes the experimental results of concrete sandwich wall panels (CSWP)specimens under pull-out loading conducted to investigate the effect of insulation type and reinforcing area of shear connector made with glass fiber-reinforced polymer (GFRP) on the shear behavior of CSWP used as exterior cladding walls.In this study, two types of thermal insulations;expanded polystyrene(EPS)and extruded polystyrene with special slots(XPSS) and wave-shaped GFRP shear connectors with different reinforcing area; 6mm x 2mm and 12mm x 2mm were used for CSWP specimens.Test results indicated that the types of insulations and reinforcing area of GFRP shear connectors have a significant effect on the direct shear behavior between concrete wall and insulation. As reinforcing area of GFRP shear connector increase, increase in shear strength of CSWP with EPS insulation is less than CSWP specimens with XPSS insulation due to relatively lower strength of EPS compared to XPSS strength.

scholarly journals INFLUENCE OF CHEMICAL POLYMER ADDITIVE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF EXPANDED POLYSTYRENE CONCRETE

2020 ◽  
Vol 60 (2) ◽  
pp. 158-168
Author(s):  
John Wasiu ◽  
Daoud Mohammad Baba
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Expanded Polystyrene ◽  
Engineering Properties ◽  
Partial Replacement ◽  
Light Weight ◽  
Polymer Additive ◽  
Liquid Form ◽  
Split Tensile Strength ◽  
Conventional Concrete

This research investigated the effect of Renolith chemical polymer additive (RCPA) on the properties of expanded polystyrene (ESP) concrete. Renolith chemical additive is a polymer-based product in a liquid form made up of latex and cellulose. Polystyrene panels were collected as a waste materials and grinded into smaller beads. An experimental investigation was carried out on the EPS replacement ranging from 0% to 100% on the M30 (C25/C30) mix design. Engineering properties, such as workability, density, water absorption, compressive strength, split tensile strength, and flexural strength tests, were studied for both the conventional and EPS concrete. The results indicate that workability increases with increasing amount of EPS contents. Water absorption, compressive, tensile, and flexural strength yielded a satisfactory result at 0-50% replacement. The density of the EPS concrete at 0-37.5% replacement revealed similar values to a conventional concrete; and light-weight concrete (1817.5 - 1030 kg⁄m3) was achieved at a 50-100% replacement. Generally, the addition of the RCPA to the concrete mix has caused an improvement in the properties of the EPS concrete. It was concluded that EPS beads can be used as a partial replacement for coarse aggregates in the production of both structural light-weight and dense concrete. The replacement of coarse aggregate with EPS beads showed a positive application as an alternative material for the construction industry.

Sign in / Sign up

Export Citation Format

Share Document