scholarly journals Development of Date Pit–Polystyrene Thermoplastic Heat Insulator Material: Physical and Thermal Properties

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Basim Abu-Jdayil ◽  
Waseem Hittini ◽  
Abdel-Hamid Mourad
Keyword(s):  
Thermal Conductivity ◽  
Building Materials ◽  
Waste Product ◽  
Thermoplastic Composite ◽  
Insulation Material ◽  
Thermal Insulator ◽  
Final Sample ◽  
Polystyrene Matrix ◽  
Heat Insulator ◽  
Conductivity Water

This study is aimed at developing a thermoplastic composite based on date pit powder waste for use as a thermal insulator in building industries. Date pits are the by-product of date stoning, either for the production of pitted dates or for the manufacture of date paste. The date pit powder (DPP) used in this study was obtained from the UAE University farm in Al Foah, UAE. DPP waste contents ranging from 0 wt.% to 50 wt.% were used to prepare the DPP-polystyrene composite. Date pit powder was mixed with polystyrene using a melt extruder, and then the mixture was transferred to the hot press to produce the final sample. The thermal and physical characteristics of the produced composites were measured experimentally and analyzed theoretically in terms of date pit and polystyrene properties. The characterized properties of the DPP-polystyrene composites, namely, density, thermal conductivity, water retention, thermal stability, and microstructure, showed that a stable composite material with insulation and construction capacity can be formed by the addition of date pit powder to the polystyrene matrix. The theoretical modeling of the measured thermal conductivity and the scanning electron microscope (SEM) monographs supported the hypothesis of date pit agglomeration in the composite matrix. The prepared composites showed low thermal conductivity (0.0515-0.0562 W/m K at 25°C) and very low density (457-630 kg/m3), thus demonstrating their potential for use as a thermal insulator for building materials. In addition, replacing one-third of the classical construction wall content with DPP-polystyrene composite showed promise for constructive applications as a thermal insulator with 85% reduction in the overall thermal conductivity. Indeed, these properties are similar to those of other conventional insulating materials. This will lead to produce an inexpensive insulation material that exploits a common waste product in date fruit-producing countries.

A Novel Building Thermal Insulation Material: Expanded Perlite Modified by Aerogel

2011 ◽  
Vol 250-253 ◽  
pp. 507-512
Author(s):  
Zi Sheng Wang ◽  
Hao Chi Tu ◽  
Jin Xiu Gao ◽  
Guo Dong Qian ◽  
Xian Ping Fan ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Mechanical Property ◽  
Thermal Insulation ◽  
Production Cost ◽  
Building Materials ◽  
Low Cost ◽  
Insulation Material ◽  
Expanded Perlite ◽  
Thermal Insulation Material ◽  
Supercritical Fluid Drying

Aerogel is regarded as one kind of super thermal insulation materials which could be large-scalely used as building materials. However, the aerogel’s production cost and poor mechanical property limit the its applications. In this paper, we put forward a new low cost way to produce a novel building thermal insulation material: synthesized the aerogel within the expanded perlite’s pores, and using sodium silicate as precursor without adopting supercritical fluid drying and surface modification. The thermal conductivity of expanded perlite was successfully decreased after modified by aerogel.

scholarly journals Effect of Thickness on Thermal Conductivity Based on Waste Newspaper Particle Board

2017 ◽  
Vol 3 (1) ◽  
pp. 210
Author(s):  
Yoan Theasy ◽  
Agus Yulianto ◽  
Budi Astuti
Keyword(s):  
Thermal Conductivity ◽  
Heat Source ◽  
Heat Insulation ◽  
Insulation Material ◽  
Particle Board ◽  
Infrared Thermometer ◽  
Board Thickness ◽  
Heat Insulator ◽  
Heat Insulation Material ◽  
The One

<p style="text-align: justify;">Waste newspaper by most people still considered as waste that has not been used optimally, and it is the one of processed materials from wood which has lignocellulose. The material has the potential to produce particle board to test the value of thermal conductivity, which it is expected to be used as heat insulator. The process of producing particle board is by mixing 450 grams pureed newspaper with 260 grams PVAC, then print it with size (12x7)cm2 with the thickness of 0.5cm; 1 cm; 1.5 cm; 2 cm; 2.5 cm; 3 cm. The process to make particle board drying is for 5 days and the test of thermal conductivity using a 100 watt heat source, and an infrared thermometer. The result obtained from the value of thermal conductivity from newspaper particle board is when more higher value of particle board thickness then more higher the thermal conductivity value. From these result it can be concluded that the particle board which can be used as heat insulation material is the one that has a thermal conductivity value of 0.066 W/ mC; 0.125 W/ mC; 0.0167 W/ mC with thickness range of 1 cm to 2 cm.©2017 JNSMR UIN Walisongo. All rights reserved.</p>

scholarly journals DETERMINATION OF THERMAL CONDUCTIVITY FOR ADOBE (CLAY SOIL) MIXED WITH DIFFERENT PROPORTIONS OF QUARTZ (SHARP SAND)

2019 ◽  
Vol 7 (3) ◽  
pp. 335-345
Author(s):  
S. K Singh ◽  
Ngaram S. M. ◽  
Wante H. P.
Keyword(s):  
Thermal Conductivity ◽  
Correlation Coefficient ◽  
Building Materials ◽  
Clay Soil ◽  
Building Construction ◽  
Average Correlation ◽  
Thermal Insulator ◽  
Materials Used ◽  
Thermal Conductivities

This research investigated the thermal conductivity of Adobe mixed with Quartz in view of their availability usage as building materials. The thermal conductivities of disc made from Adobe-Quartz chippings were determined. The values of the thermal conductivities obtained were between 0.6Wm-1k-1and 0.9Wm-1k-1, these values could be used to identify Adobe/Quartz as one of the engineering materials used in building construction. Adobe/Quartz was prepared in discs form of the same diameters and thicknesses and was also compressed under the same pressure of 15 atmospheres (100: 0, 95: 5and 80: 20). The average values of the thermal conductivities were between 0.07Wm-1Ҡ-1 and 0.93Wm-1Ҡ-1, for sample contained the proportion of (80:20) and the sample of ratio (95:5). MATLAB 7.0 and EXCEL software were used in the various computations, especially in determining dT/dt, Root mean square error (RMSE), Curve fittings parameter and the correlation coefficient, R2. An average correlation coefficient of 0.78 was existed between Adobe-Quartz ratio and thermal conductivity. The equation, y = -0.11x2 + 0.01x + 1.03 is the general equation that can be used for the prediction of average thermal conductivity at various ratios. Where y is the average thermal conductivity and x here signifies the ratios. This also indicates that compacted Adobe-Quartz of low density will be a suitable thermal insulator when used as aggregates in walls.

scholarly journals Proposal of Sandwich Composite from Bioresource and Polystyrene Waste Materials

2018 ◽  
Vol 7 (4.20) ◽  
pp. 329
Author(s):  
Aqil M. ALmusawi ◽  
Remy Lachat ◽  
Dominique Chamoret ◽  
Kokou Atcholi ◽  
Sagnaba Soulama
Keyword(s):  
Building Materials ◽  
Core Layer ◽  
Thermoplastic Composite ◽  
Sandwich Composite ◽  
Individual Layer ◽  
The Core ◽  
Composite Layers ◽  
Polystyrene Matrix ◽  
Thermoforming Process ◽  
Polystyrene Waste

Lately there is a renewed interest in the use of bio-resource materials for the production of ecological, sustainable and inexpensive building materials. Sandwich composite of minimum plastic matrix was manufactured, this was achieved by using the Thermoforming process in two steps. In the first step, the core layer was made when thermo pressed 100% hemp Shive particles under a high pressure. The second step was accomplished by wrapping the core layer with two thermoplastic composite layers of 60% of hemp tissue and 40% recycled Polystyrene. Interestingly, through the first step, elevated temperature treated the core surface (hydrophilic) and gave it greater adherence to the Polystyrene matrix (hydrophobic). Mechanical properties of this proposed sandwich composite of 80 % bio-resource were approximately four times of the Polystyrene resistance. Furthermore, the microscopic study was performed to investigate the bonding of the different components, especially for the binderless core layer. Each individual layer and the sandwich form were mechanically investigated, and the finite element method, via ANSYS, was used to illustrate the stresses in the sandwich structure.   

Thermal Properties of Oil Palm Shell Lightweight Concrete with Different Mix Designs

2014 ◽  
Vol 70 (1) ◽  
Author(s):  
Eravan Serri ◽  
Md Azree Othuman Mydin ◽  
Mohd Zailan Suleiman
Keyword(s):  
Thermal Conductivity ◽  
Oil Palm ◽  
Lightweight Concrete ◽  
Waste Product ◽  
Lightweight Aggregate ◽  
Strong Relationship ◽  
Unit Weight ◽  
Insulation Material ◽  
Palm Shell ◽  
Oil Palm Shell

Nowadays, the utilization of Oil Palm Shell (OPS) as lightweight aggregate in concrete especially in the structure application has become prevalent. As an industrial waste product, Oil Palm Shell (OPS) possibly will be the alternative material to be employed in the construction industry. With its advantage as heat resistant material, this study will focus on the potential of OPS as lightweight aggregate with regard to the optimum content of OPS for thermal insulating material. A total of 15 mixes were prepared and tested with 3 different cement/sand ratios (1.7, 1.8, 1.9) and 5 different cement contents (300, 350, 400, 450, 500 kg/m³). The result of this study show that the highest sand used will produced good workability but increased thermal conductivity of mix value. The test result indicates that the thermal conductivity and insulation criterion is substantially improved with the volume use of OPS and strong relationship between thermal conductivity and unit weight is obtained. The measured thermal conductivity value range from 0.54W/mC to 1.1 W/mC. The ideal value for semi structure insulation material establish by RILEM only  achieve for mix that used cement content 400 kg/m³ and below, which thermal conductivity is 0.75 W/mC below.  

scholarly journals Green Building Materials Based on Waste Filler and Binder

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nadezda Stevulova ◽  
Jozef Junak
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Absorption ◽  
Building Materials ◽  
Composite System ◽  
Treatment Process ◽  
Green Building ◽  
Chemically Modified ◽  
Green Building Materials ◽  
Conductivity Water

Abstract This study is aimed at the application of alternative binder (AB) into bio-aggregate-based composite. The technically important parameters (density, thermal conductivity, water absorption and compressive strength) of 28, 60 and 90 days hardened green composites containing chemically and physico-chemically modified hemp hurds (HH) with AB compared to the Portland cement (PC) are presented. Testing of two reference bio-composites with original HH confirmed higher values of compressive strength and thermal conductivity unlike water absorption for all hardened specimens based on alternative binder (MgO-cement) compared to conventional PC. Changes in the final properties of hardened bio-composites were affected by treatment process of organic filler and alkaline nature of MgO-cement. The combination of purified HH by ultrasound treatment and AB appears to be promising for preparation of bio-based composite material with better properties compared to PC. In this paper, other option of the preparation of bio-composite system based on original (non-treated) filler and binder consisting of optimal activated MgO and silica fume is presented.

scholarly journals Production and Physical–Mechanical Characterization of Peat Moss (Sphagnum) Insulation Panels

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6601
Author(s):  
Günther Kain ◽  
Marco Morandini ◽  
Angela Stamminger ◽  
Thomas Granig ◽  
Eugenia Mariana Tudor ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Mechanical Stability ◽  
Urea Formaldehyde ◽  
Modulus Of Rupture ◽  
Peat Moss ◽  
Diffusion Resistance ◽  
Insulation Material ◽  
Wet Process ◽  
Conductivity Water ◽  
Compression Resistance

Peat moss (sphagnum) is a commonly used sealant, fill, and insulation material in the past. During the efforts to rewet drained moors due to ecological considerations, the technical use of peat moss (sphagnum farming) again became the focus of attention. In the framework of this investigation, insulation panels consisting of peat moss, bound with urea formaldehyde, were produced. Panels manufactured in a wet process and mats bound with textiles were also fabricated. The specimens’ thermal conductivity, water vapor diffusion resistance, modulus of rupture, modulus of elasticity, internal bond, compression resistance, water absorption, and thickness swelling were measured. Physical–mechanical properties were adequate with the resin-bound panels, but not with wet process panels. Moss mats had good characteristics for cavity insulation purposes. The thermal conductivity of the moss panels and mats was found to be lowest with a density of 50 kg/m³, accounting for 0.04 W/m·K. The results show that peat moss is a promising resource for production insulation panels, because their thermal conductivity and mechanical stability are comparable to other insulation materials.

scholarly journals Properties of Cement-Bonded Particleboards Made from Canary Islands Palm (Phoenix canariensis Ch.) Trunks and Different Amounts of Potato Starch

Forests ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 560
Author(s):  
Manuel Ferrandez-Villena ◽  
Clara Eugenia Ferrandez-Garcia ◽  
Teresa Garcia-Ortuño ◽  
Antonio Ferrandez-Garcia ◽  
Maria Teresa Ferrandez-Garcia
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Canary Islands ◽  
Building Materials ◽  
Potato Starch ◽  
Industrial Applications ◽  
Mechanical Tests ◽  
Modulus Of Rupture ◽  
Insulation Material ◽  
Phoenix Canariensis

Wood-cement panels are becoming increasingly widely used as prefabricated building materials. In order to increase the use of renewable resources as materials for industrial applications, the use of alternative plant fibres has been gaining interest. Additionally, it is assumed that new or better board properties can be achieved due to the different chemical and mechanical properties of such alternative sources of fibres. In south-eastern Spain, the Canary Islands palm (Phoenix canariensis) is widely used in urban landscaping. Plantations attacked by red palm weevils generate abundant plant waste that must be shredded and taken to authorised landfills. This paper discusses the use of particles of Canary Islands palm for manufacturing fibre panels containing 20% cement in relation to the weight of the particles, using different proportions of starch as a plasticiser. A pressure of 2.6 MPa and a temperature of 100 °C were used in their production. Density, thickness swelling, water absorption, internal bonding strength, modulus of rupture (MOR), modulus of elasticity (MOE), and thermal conductivity were studied. The mechanical tests showed that the MOR and MOE values increased with longer setting times, meaning that the palm particles were able to tolerate the alkalinity of the cement. The board with 5% starch had a MOR of 15.76 N·mm−2 and a MOE of 1.872 N·mm−2 after 28 days. The boards with thicknesses of 6.7 mm had a mean thermal conductivity of 0.054 W·m−1·K−1. These boards achieved good mechanical properties and could be used for general use and as a thermal insulation material in building construction.

scholarly journals Utilization of Water Hyacinth (Eichhornia crassipes) and Corncob (Zea mays) in Epoxy-based Biocomposite Board for Cool Box Thermal Insulation Material

2021 ◽  
Vol 891 (1) ◽  
pp. 012001
Author(s):  
N M K S Sruti ◽  
P R Jenaneswari ◽  
M R Rahayu ◽  
FA Syamani
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Bending Strength ◽  
Insulation Material ◽  
Thermal Insulation Material ◽  
Thermal Insulator ◽  
Useful Life ◽  
Effectiveness Assessment

Abstract Generally, the cool box is produced using styrofoam as the main thermal insulation material. However, the use of styrofoam potentially cause pollution to the environment at the end of its useful life because it cannot decompose naturally. The effort to overcome this problem is by producing thermal insulation materials from natural sources such as water hyacinth and corncob. The purpose of this study was to determine the characteristics of biocomposite board made from combination of water hyacinth powder and corncob ash based on physical, mechanical, and thermal conductivity analysis. Biocomposite boards were produced by introducing combination of water hyacinth powder and corncorb ash (5, 10, 15%wt) into epoxy resin. The ratio of water hyacinth powder and corncob ash were 100:0 (P0), 95:5 (P1), 90:10 (P2), 85:15 (P3). The biocomposite boards were also made from water hyacinth powder and corncob powder, which ratio of 15:85 (P4) and 0:100 (P5). The results of this research revealed that type P5 board had the lowest density value (0.927 g / cm3) and the lowest water absorption value (1.53%). The P2 type board shows the highest bending strength (8.6 N/mm2) which met the requirements of JIS A 5908 for particleboards type 8. The highest value of compressive strength was observed at P5 type board which was 2.94 ± 0.53 N / mm2. The lowest thermal conductivity values were observed at P2 type boards (0.305 W / mK). It can be concluded that, P2 type board had the best thermal insulator properties among other boards in this study. The thermal insulation effectiveness assessment of biocomposite board for cool box application was conducted using P2 and P5 type boards. The assessment results demonstrated that the styrofoam cool box and commercial cool box performance for maintaining temperature were superior compared to biocomposite cool box. Therefore, it is necessary to re-examine the biocomposite cool box, especially in terms of panel assembling and the shape of the lid, to produce biocomposite cool box with thermal insulator properties comparable to the commercial cool box.

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