scholarly journals Durability of Thermal Renders with Lightweight and Thermal Insulating Aggregates: Regranulated Expanded Cork, Silica Aerogel and Expanded Polystyrene

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 35
Author(s):  
André Morgado ◽  
António Soares ◽  
Inês Flores-Colen ◽  
Maria do Rosário Veiga ◽  
Maria Glória Gomes
Keyword(s):  
Thermal Insulation ◽  
Silica Aerogel ◽  
Energy Efficient ◽  
Accelerated Aging ◽  
Expanded Polystyrene ◽  
Ultra Sound ◽  
Freeze Thaw ◽  
Thermal Insulating ◽  
Before And After ◽  
Efficient Construction

Following the trend of energy-efficient construction, renders with thermal insulation properties have been studied for replacing conventional renders. However, there are still few studies on the durability of these renders that may become a barrier for their implementation. In this study, the performance of lightweight renders for thermal insulation to accelerated aging cycles and freeze/thaw cycles is discussed. For this purpose, renders with regranulated expanded cork (GEC), silica aerogel (SA), and expanded polystyrene (EPS) were produced and tested for compressive strength, ultra-sound velocity, Young’s modulus, and thermal conductivity before and after accelerated aging cycles (hygrothermal, IR and freeze/thaw cycles). With this study, a comparison between the influence of different aggregates on renders is carried out in order to understand their effect on different properties of renders.

scholarly journals Inverted roof insulation kits and their durability

2018 ◽  
Vol 163 ◽  
pp. 08005 ◽  
Author(s):  
Barbara Francke ◽  
Robert Geryło
Keyword(s):  
Water Absorption ◽  
Thermal Insulation ◽  
Laboratory Tests ◽  
Expanded Polystyrene ◽  
Insulation Layer ◽  
Performance Properties ◽  
Climate Conditions ◽  
Freeze Thaw ◽  
Moisture Increase

In the paper there was analyzed a mechanism of loss of performance properties of inverted roof insulation kits resulted by moisture increase of the insulation layers. This problem is very important in such systems because the thermal insulation is placed above the waterproofing layer and is not protected against water absorption. Abovementioned problem is more and more common in the course of building’s utilization in Polish climate conditions. Because inverted roof kits are based on extruded polystyrene (XPS) and expanded polystyrene (EPS), those materials have been used in tested samples. The results of laboratory tests showed the phenomenon and its effect on durability and sustainability of roof covering performance. It was also found that the biggest influence on the increase of moisture in the thermal insulation layer has not the long term water absorption by immersion but freeze –thaw cycles.

The Cause Detection and Analysis of the Surface Cracks on ETIRS

2011 ◽  
Vol 71-78 ◽  
pp. 4533-4539
Author(s):  
Ju Gang Luo
Keyword(s):  
Thermal Insulation ◽  
Basic Concept ◽  
Structure Design ◽  
Expanded Polystyrene ◽  
Surface Cracks ◽  
Insulation System ◽  
Construction Quality ◽  
Thermal Insulating ◽  
Insulation Wall

The cause detection and analysis have been made over the surface cracks of external thermal insulating rendering systems made of mortar with bonding powder and using expanded polystyrene granule as aggregate (ETIRS) by means of integrating the basic concept of the cracks and actual project practices, on the basis of structure design, materials performances and construction. The result shows that the major causes for surface cracks, the hazardous ones are caused by poor construction quality. In order to guarantee the quality of external thermal insulation wall, the structure design of the said thermal insulation system shall be underlined and building quality on the key parts, stressed.

Experimental Study of External Thermal Insulation Mortar Based on Fly Ash Floating Bead

2012 ◽  
Vol 476-478 ◽  
pp. 1643-1646 ◽  
Author(s):  
Jin Ping Chen
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
Portland Cement ◽  
Thermal Insulation ◽  
Lightweight Aggregate ◽  
Expanded Polystyrene ◽  
The Other ◽  
Exterior Wall ◽  
Thermal Insulating ◽  
Better Than

In this paper, the development and properties of floating bead insulation mortar were introduced. Based on the experimental study, a new kind of exterior wall external thermal insulating mortar had been successfully produced. For this material, fly ash floating bead and expanded pearlite which was modified by hydrophobe were taken as the lightweight aggregate, meanwhile, Portland cement was used as the inorganic binder, also the fiber and polymer were taken as the additive. The results of experiments indicated that properties of fly ash floating bead insulating mortar, such as thermal insulation, strength, crack resistant and climate resistant, were superior to those of expanded pearlite insulating mortar. On the other hand, other properties, such as bulk stability, aging resistant, climate resistant, crack resistant and fireproofing, construction workability were much better than those of expanded polystyrene sheet ( EPS) insulating mortar.

scholarly journals Aerogels as Promising Thermal Insulating Materials: An Overview

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Prakash C. Thapliyal ◽  
Kirti Singh
Keyword(s):  
Thermal Insulation ◽  
Energy Efficient ◽  
Structural Features ◽  
Primary Energy ◽  
Building Envelope ◽  
High Porosity ◽  
Thermal Insulating ◽  
Wide Range ◽  
Potential Applications ◽  
Insulation Systems

Aerogels are solids with high porosity (<100 nm) and hence possess extremely low density (∼0.003 g/cm3) and very low conductivity (∼10 mW/mK). In recent years, aerogels have attracted more and more attention due to their surprising properties and their existing and potential applications in wide range of technological areas. An overview of aerogels and their applications as the building envelope components and respective improvements from an energy efficiency perspective including performance is given here. This overview covers thermal insulation properties of aerogels and studies regarding structural features which will be helpful in buildings envelope. The improvements of thermal insulation systems have future prospects of large savings in primary energy consumption. It can be concluded that aerogels have great potential in a wide range of applications as energy efficient insulation, windows, acoustics, and so forth.

scholarly journals HEAT INSULATION-APPARATUS SYSTEMS OF HOUSEHOLD FACADE AS A FACTOR OF INCREASED FIRE HAZARD

Fire Safety ◽  
2018 ◽  
pp. 80-89
Author(s):  
R. Yakovchuk ◽  
A. Kuzyk ◽  
O. Miller ◽  
A. Lyn
Keyword(s):  
Thermal Insulation ◽  
Heat Insulation ◽  
Fire Hazard ◽  
Expanded Polystyrene ◽  
Design Solution ◽  
Insulation Material ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Number Of Factors ◽  
Insulation Systems

The paper analyzes the problems associated with the fire hazard of the application of thermal insulation and finishing systems of facades of buildings, which directly depends on the design solution of the thermal insulation system and the type of thermal insulation material. The generalized requirements for physical and technical indicators of the quality of heat-insulating materials; the possibility of applying facade heat insulation structures depending on their class, the height of the houses and the combustibility of the materials of the heat-insulating and finishing layers; fire-technical characteristics of expanded polystyrene are considered. The threats of fire spreading by thermal insulation systems of facades are analyzed and possible ways of its propagation between floors are considered. It is concluded that the use of combustible thermal insulating materials poses an increased danger to life and health of people during a fire. The problem of ensuring the fire safety of buildings, in which the insulation and finishing systems of exterior walls are used, depends on a number of factors and requires a more thorough study.

Energy Remediation Combining Insulation Materials Based on Calcium Silicate and Expanded Polymers

2016 ◽  
Vol 865 ◽  
pp. 196-200 ◽  
Author(s):  
A. Brenek ◽  
V. Vaclavik ◽  
T. Dvorsky ◽  
Vojtěch Šimíček
Keyword(s):  
Thermal Insulation ◽  
Calcium Silicate ◽  
Expanded Polystyrene ◽  
Insulating Materials ◽  
Insulation Materials ◽  
Clay Bricks ◽  
Thermal Insulating ◽  
House Construction ◽  
Lower House ◽  
Transient Models

Energy rehabilitation of buildings using airtight insulating materials based on expanded polystyrene is often accompanied by the formation of moisture problems in the enclosure wall footing. Moisture progress in the rehabilitated structure is simulated using modern moisture transient models in Delphin software. Combinations of the developed plate thermal insulating materials based on calcium silicate and the conventional thermal insulation panels based on expanded polymer have been designed to address the moisture problems. This article describes the function of this solution during the reconstruction of a house built from full clay bricks with malfunctioning waterproofing in the lower house construction.

Built-In Moisture Process in Structure with Damaged Waterproofing after the Application of Thermal Insulation Boards

2014 ◽  
Vol 1020 ◽  
pp. 591-596 ◽  
Author(s):  
Aleš Břenek ◽  
Vojtěch Václavík ◽  
Tomáš Dvorský ◽  
Jaromír Daxner ◽  
Vojtech Dirner
Keyword(s):  
Thermal Insulation ◽  
Moisture Transport ◽  
Building Envelope ◽  
Expanded Polystyrene ◽  
High Moisture ◽  
Insulating Material ◽  
Common Solution ◽  
Thermal Insulating ◽  
Fired Bricks ◽  
Lower Structure

The article deals with energy rehabilitation of a building with damaged waterproofing of its lower structure. The reference construction is made of fired bricks, whose functional properties are perfectly fine, but the thermal insulation properties are insufficient for this time. The most common solution of such a problem is the application of a thermal insulating material based on expanded polystyrene on the building envelope. Unfortunately, these solutions often entail the risk of moisture problems in places that appeared to be dry before. The article compares the current solution with the new one relying on material based on calcium silicate [4] with high moisture transport capabilities as an alternative insulation of these buildings.

scholarly journals A technical and economic analysis of the thermal modernization of historic buildings using an innovative thermal insulating paint

2019 ◽  
Vol 28 (2) ◽  
pp. 212-223
Author(s):  
Robert Kruzel ◽  
Paweł Helbrych
Keyword(s):  
Thermal Insulation ◽  
Traditional Method ◽  
Expanded Polystyrene ◽  
Innovative Technology ◽  
Cost Calculation ◽  
Material Strength ◽  
Historic Buildings ◽  
Advantages And Disadvantages ◽  
Thermal Insulating ◽  
Aesthetic Appearance

Due to the need for making the thermal modernization of buildings of historical value, where the Conservation Officer often does not approve the thermal insulation of the building’s facade with a traditional method using expanded polystyrene (EPS), an innovative paint has been proposed to be used, which can substitute for an EPS layer for the thermal insulation of buildings where everything that is the most beautiful is often situated on the building’s external facade. The article analyzes two different thermal modernization methods: the traditional method and the one using an innovative thermal insulating paint. During selecting the material, the main aspects were: material strength and durability, workmanship, the execution cost of a sample project, and the behaviour of materials during operation. All advantages and disadvantages of either of the external wall thermal insulation technologies are indicated. Cost calculation figures for the project under consideration carried out using the above-mentioned technologies have also been examined. It has been found that the technology using the innovative thermal insulating paint is fairly expensive and the obtained coefficients of heat transfer through the partition are not competitive compared to the traditional method using expanded polystyrene. However, by using the innovative technology for historic buildings, we are able to improve the aesthetic appearance of the facade and, at the same time, the thermal properties of the partition during carrying out a single project, while not spoiling the historical look of the building.

MODELLING OF INDUCTION HEATING OF EXTRUDER BARREL DURING MANUFACTURING EXPANDED POLYSTYRENE SLABS

2011 ◽  
Vol 1 (1) ◽  
pp. 129-132 ◽  
Author(s):  
A. I DANILUShKIN ◽  
V. A DANILUShKIN
Keyword(s):  
Mathematical Models ◽  
Induction Heating ◽  
Energy Efficient ◽  
Expanded Polystyrene ◽  
Efficient Construction

The mathematical models of the process of indirect induction heating of granulated polystyrene in extruder during manifacturing of expanded polystyrene slabs are viewed. The proposed models are used to design energy-efficient construction of induction heaters in extrusion- type line for the production of expanded polystyrene slabs.

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