scholarly journals Cup Plant (Silphium perfoliatum L.) Biomass as Substitute for Expanded Polystyrene in Bonded Leveling Compounds

Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 178
Author(s):  
Lüders Moll ◽  
Martin Höller ◽  
Charlotte Hubert ◽  
Christoph A. C. Korte ◽  
Georg Völkering ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Compression Strength ◽  
Biogas Production ◽  
Lightweight Aggregate ◽  
Expanded Polystyrene ◽  
Partial Substitution ◽  
Highly Sensitive ◽  
Food Applications ◽  
Biomass Plant ◽  
Shape Characteristics

Biomass for non-food applications is considered as a substitute for petro-based materials such as expanded polystyrene (EPS). This research analyzes physical properties of an EPS containing commercial bonded leveling compound (BLC) which was substituted with cup plant (Silphium perfoliatum L.) biomass. Cup plant is a high-yielding biomass plant with several ecological benefits that is yet mainly used for biogas production. Furthermore, the high amount of parenchyma in senescent biomass with its EPS-like structure could be a possible substitute for petrochemical foams in lightweight aggregates. The natural variation in parenchyma content of several European cup plant accessions is promising, regarding the development of cultivars with suitable biomass properties for the proposed material use. Two binders with different proportions of cup plant and EPS were used to produce samples of BLC for thermal conductivity and compression strength tests. The compression strength of 0.92 N mm−2 and a thermal conductivity of 84 mW m−1 K−1 were analyzed and comparable to the commercial BLC. The thermal conductivity within the tested borders appears nearly independent of the biomass content. With increasing cup plant content, the shape characteristics of the lightweight aggregate mix changes towards more elongated aggregates. The mechanical strength and thermal conductivity are highly sensitive to the water demand of the biomass. Direct partial substitution of EPS by cup plant appears feasible and could be a part of the decarbonization of the construction sector.

scholarly journals THE EFFECT OF EXPANDED GLASS AND POLYSTYRENE WASTE ON THE PROPERTIES OF LIGHTWEIGHT AGGREGATE CONCRETE

2016 ◽  
Vol 8 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Jurga Šeputytė-Jucikė ◽  
Marijonas Sinica
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Thermal Conductivity Coefficient ◽  
Lightweight Aggregate ◽  
Expanded Polystyrene ◽  
Partial Replacement ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
Low Thermal Conductivity ◽  
Polystyrene Waste

The main objective of this study is to create a lightweight aggregate concrete (LWAC) with a low thermal conductivity coefficient using expanded glass (EG) aggregate, produced from waste glass or crushed expanded polystyrene waste, obtained by crushing waste packing tare of household appliances. Research related to the effects of the amount of Portland cement (PC) as well as EG aggregates and crushed expanded polystyrene waste on physical (density, thermal conductivity coefficient, water absorption and capillary coefficient) and mechanical (compressive strength) properties of LWAC samples are provided. Insulating LWAC based on a small amount of PC and lightweight EG aggregates and crushed expanded polystyrene waste, with especially low thermal conductivity coefficient values (from 0.070 to 0.098 W/ (m·K)) has been developed. A strong relationship between thermal conductivity coefficient and density of LWAC samples was obtained. The density of LWAC samples depending on the amount of PC ranged between 225 and 335 kg/m3. A partial replacement of EG aggregate by crushed expanded polystyrene waste, results in relative density decrease of LWAC samples. In LWAC samples the increased amount of PC results in increased compressive strength.

scholarly journals Behaviour of Light Weight Brick with the Influence of EPS Beads and Silica Fume

2020 ◽  
Vol 9 (3) ◽  
pp. 862-867
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Absorption ◽  
Silica Fume ◽  
Expanded Polystyrene ◽  
Partial Substitution ◽  
Fine Aggregate ◽  
Light Weight ◽  
Literature Study ◽  
Thermal Insulating

The principal reason behind this experimental investigation carried out here is to diminish the dead load of structures with the potential use of light weight bricks. EPS beads and silica fume are light in nature. The investigation work enhanced, with numerous literature study to find out the utilization of Expanded polystyrene(EPS) beads and silica fume in light weight brick can be used in military bases in cold regions due to its low thermal insulating quality. The main objective of this research is to prepare a light weight brick by partial substitution of Cement with silica fume and the replacement of fine aggregate with EPS beads. A total of 70 bricks containing two different sizes of EPS beads say Type A and Type B with different proportions (0%, 7%, 14%, 21%) of each Type were casted in order to check the mechanical properties such as compressive strength, water absorption, efflorescence, workability, and thermal conductivity of the brick. The compressive strength test was carried out at 7, 14 and 28 days of curing. As the percentage of EPS beads in the brick increased the strength of brick decreased while with the increase of EPS beads in the brick the water absorption as well as the thermal conductivity of brick decreased. There were slight presence of Efflorescence in some of the bricks while in most of the brick there were no efflorescence found.

scholarly journals IMPACT OF GRANULES FROM CRUSHED EXPANDED POLYSTYRENE PACKAGE ON PROPERTIES OF THERMO-INSULATING PLASTER

2014 ◽  
Vol 20 (4) ◽  
pp. 581-589 ◽  
Author(s):  
Jurga Šeputytė-Jucikė ◽  
Georgij Arsenij Sezeman ◽  
Marijonas Sinica ◽  
Modestas Kligys ◽  
Saulius Vaitkus
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Vapour ◽  
Adhesion Force ◽  
Lightweight Aggregate ◽  
Expanded Polystyrene ◽  
Water Vapour Permeability ◽  
Regression Equations ◽  
Vapour Permeability ◽  
Aerated Concrete

The paper deals with the use of lightweight porous aggregate, i.e. crushed expanded polystyrene package crumbs (EPSC) in the composition of thermo-insulating plaster. Its effectiveness is compared to that of spherical granules of expanded polystyrene – white coloured (EPS) and grey coloured (NEOPOR). The content of lightweight aggregate changed from 1.25 to 1.75 l/kg of dry mix. The investigation focused on properties of modified plaster, such as density, compressive strength, thermal conductivity and water vapour permeability. It was established that EPSC reduce density of plaster from 1350 to 530 kg/m3, improving such properties as thermal conductivity and water vapour permeability but decreasing compressive strength. In addition, the paper established the adhesion force of plaster (content of lightweight aggregate was 1.25 l/kg of dry mix) to ceramics, silicate and autoclaved aerated concrete masonry elements. The character of macrostructure of plaster was considered, as well as bonding with a coat of decorative paint. It was found that plaster with EPSC has similar properties to plasters with EPS and NEOPOR aggregates; however, in case of EPSC, the relative vapour resistance is better. The provided regression equations can be used for prediction of differently modified plasters.

Preparation and Performance of Inorganic Thermal Insulation Glazed Hollow Bead Material

2016 ◽  
Vol 680 ◽  
pp. 306-310
Author(s):  
Lei Yu ◽  
Cheng Zhang ◽  
Zhen Gan Wu
Keyword(s):  
Thermal Conductivity ◽  
Surface Morphology ◽  
Thermal Insulation ◽  
Compression Strength ◽  
Lightweight Aggregate ◽  
Optimal Level ◽  
The Other ◽  
High Concern ◽  
Building Wall ◽  
And Performance

Glazed hollow bead, a kind of inorganic lightweight aggregate that has been recently developed, has raised high concern in the field of thermal insulation of building wall due to its low thermal conductivity, low water absorption, good fireproof performance and relatively high compression strength. In this paper, the preparation of this thermal insulation glazed hollow bead material was introduced in detail, the influence of the amount of gel material on bulk density, porosity, thermal conductivity, compression strength of the thermal insulation glazed hollow bead material was investigated, the surface morphology and surface components were characterized by means of SEM and EDS. Results showed that the density, thermal conductivity and compression strength increased while the porosity decreased with the amount of gel material increasing. Appropriate temperature enables gel material to work at optimal level under which the compression strength increases, on the other hand, the porosity also increases, therefore, the thermal conductivity decreases.

Research on Porous Properties of Air-Entrained Lightweight Aggregate Concrete

2013 ◽  
Vol 652-654 ◽  
pp. 1209-1212
Author(s):  
Wei Xin Hu ◽  
Abulitipu. Abudula
Keyword(s):  
Thermal Conductivity ◽  
Porous Structure ◽  
Concrete Strength ◽  
Lightweight Aggregate ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
Materials Properties ◽  
Porous Properties ◽  
Concrete Materials ◽  
The Right

Lightweight aggregate concrete with bleed air : the air-entraining agent added to the lightweight aggregate concrete , cement paste to form the porous structure of the porous structure of the right amount of artificial lightweight aggregate concrete . Reduce the density of the concrete to improve the insulation properties of the concrete . Applied to structural insulation concrete strength than 20Mpa, the thermal conductivity is less than 0.36W / ( m • K) . Of lightweight aggregate structure insulation concrete materials properties and microstructure of variation with air entraining agent .

scholarly journals Use the Polymer Concrete as a Substitute for Ordinary Concrete by Improving of Acoustic and Thermal Insulation With Suitable Cost

2017 ◽  
Vol 1 (2) ◽  
pp. 650-661
Author(s):  
Amer M. Ibrahim ◽  
Ali Adwan Hmood ◽  
Noor Al Huda H. Ahmed
Keyword(s):  
Thermal Conductivity ◽  
Compression Strength ◽  
Chemical Interaction ◽  
Economic Feasibility ◽  
Polymer Concrete ◽  
Light Weight ◽  
Novolac Resin ◽  
Ordinary Concrete ◽  
Acoustic Insulation ◽  
Light Weight Aggregate

The purpose of this study is to examine the effect of adding novolac resin by different volumetric percentages to concert as a light weight aggregate In addition to the economic feasibility of the use of these concrete in the field of build and construction .they investigated tht the compression strength, thermal conductivity, acoustic insulation and densities. The results showed ultimate compression strength and acoustic insulation by melting novolac and added to the cement and sand as a polymer concrete in the hot state (by melting novoac >90c).However added novolac resin as aggregate in the cold state to the concrete increase thermal conductivity and increasing compression strength and acoustic insulation .This results gained by chemical interaction of novolac and cement.  

Reliability of Thermal Conductivity Measured by Harman Method

1998 ◽  
Vol 545 ◽  
Author(s):  
Y. Shinohara ◽  
Y. Imai ◽  
Y. Isoda ◽  
I. A. Nishida
Keyword(s):  
Thermal Conductivity ◽  
Temperature Difference ◽  
Electron Concentration ◽  
Thermoelectric Materials ◽  
Comparative Method ◽  
Sintered Compact ◽  
Heat Temperature ◽  
Harman Method ◽  
Highly Sensitive ◽  
Standard Value

AbstractThe Harman method was applied to measure thermal conductivity κ of thermoelectric materials, and the reliability of the measured κ was investigated. The quantitative κ requires a highly sensitive technique to measure minute Peltier heat. Temperature difference by Peltier heat pumping was successfully measured by developing the DC method of resistance measurement. κ of n-type Bi2Te3 sintered compact and n-type PbTe boules was measured at 295K by the Harman method. Static comparative method was also applied to obtain the standard value of κ. In the case of Bi2Te3, the κ by the Harman method agreed well with the standard value. In the case of PbTe in the electron concentration ne range <5 × 1024/m3, the κ almost agreed with the standard value. However, PbTe in the ne range ≥1 × 1025/m3 showed a larger κ than the standard value. The Harman method has an error to give the larger κ for the material with a large carrier component κ, of κ This error is due to the fast conduction of Peltier heat by the carrier. The reliable κ can be measured for the material with a small κ,.

Study of Sawdust and Expanded Polystyrene as Cavity Filler Material on the Effect of Thermal Conductivity in Perforated Clay Brick

2017 ◽  
Vol 890 ◽  
pp. 411-414
Author(s):  
Mun Kou Lai ◽  
Abdullah Salem Basalem Maged
Keyword(s):  
Thermal Conductivity ◽  
Specific Heat ◽  
Temperature Change ◽  
Electricity Consumption ◽  
Expanded Polystyrene ◽  
Filler Material ◽  
Waste Products ◽  
High Specific Heat ◽  
Building Wall ◽  
Good Potential

The main objective of this paper is to reduce the amount of external heat penetrating the building wall, hence reducing the cooling load requirements and eventually the electricity consumption. Expanded polystyrene and wood sawdust were chosen as filler material to reduce the thermal conductivity in perforated bricks because both are commonly found waste products with good potential due to their lightweight, low thermal conductivity and high specific heat. It was found that bricks with polystyrene recorded the lowest temperature change. Although sawdust has a much higher thermal conductivity, the temperature change is almost similar to that of polystyrene. This could be attributed by the higher density of wood, which means more mass are occupying the same volume of space. Hence, the paper found that thermal conductivity, specific heat capacity and density of the filler material can influence the effective thermal conductivity of the perforated brick.

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