scholarly journals Sound Insulating Properties of Certain Building Materials

1935 ◽  
Vol 7 (1) ◽  
pp. 72-72
Author(s):  
John S. Parkinson
Keyword(s):  
Building Materials ◽  
Insulating Properties

scholarly journals Sound-Absorbing and Thermal-Insulating Properties of Cement Composite Based on Recycled Rubber from Waste Tires

2021 ◽  
Vol 11 (6) ◽  
pp. 2725
Author(s):  
Jakub Svoboda ◽  
Tomáš Dvorský ◽  
Vojtěch Václavík ◽  
Jakub Charvát ◽  
Kateřina Máčalová ◽  
...  
Keyword(s):  
Building Materials ◽  
Absorption Capacity ◽  
Acoustic Properties ◽  
Strength Characteristics ◽  
Cement Composites ◽  
Waste Tires ◽  
Natural Aggregate ◽  
Thermal Insulating ◽  
Recycled Rubber ◽  
Insulating Properties

This article describes an experimental study aimed at investigating the potential use of recycled rubber granulate from waste tires of fractions 0/1 and 1/3 mm in cement composites as a 100% replacement for natural aggregates. The use of waste in the development and production of new building materials represents an important aspect for the sustainability and protection of the environment. This article is focused on the sound-absorbing and thermal-insulating properties of experimental cement composites based on recycled rubber from waste tires. The article describes the grain characteristics of recycled rubber, sound absorption capacity, thermal conductivity and strength characteristics. The results of this research show that the total replacement of natural aggregate with recycled rubber in cement composites is possible. Replacing natural aggregate with recycled rubber has significantly improved the thermal and acoustic properties of the prepared cement composites, however, at the same time; there was also the expected decrease in the strength characteristics due to the elasticity of rubber.

Development of New Advanced Plasters with Waste Fibers Content

2018 ◽  
Vol 276 ◽  
pp. 248-253
Author(s):  
Jiří Zach ◽  
Jitka Peterková ◽  
Vítězslav Novák
Keyword(s):  
Mechanical Properties ◽  
Building Materials ◽  
Raw Materials ◽  
Cellulose Fibers ◽  
Positive Influence ◽  
Point Of View ◽  
Pet Bottles ◽  
Thermal Insulating ◽  
Insulating Properties ◽  
Recycled Waste

The paper deals with the possibilities of using secondary raw materials in the development of new advanced lightweight plasters. It was about fibers from recycled waste materials (waste paper, PET bottles, tyres) and recycled insulation (stone wool). The aim of adding fibers to these lightweight building materials was improvement of mechanical properties, improvement thermal insulation properties and reduction of crack sensitivity. It can be stated, based on the evaluation of the selected measurements, that both types of cellulose fibers and fibers from recycled tyres had positive influence on the mechanical properties, namely in the case of compressive strength. From the point of view of thermal insulating properties, it can be said that only 2 types of fibers have reduced the value of the thermal conductivity. They were mixtures with stone fibers and with recycled tyres fibers. Both of these mixtures also showed the lowest average values of bulk density. Based on the carried out research works can be it concluded that the use of recycled tyres fibers show as optimal.

Possibility of Using the Technical Hemp as a Filling Component in External Thermal-Insulation Composite Systems

2012 ◽  
Vol 587 ◽  
pp. 47-51 ◽  
Author(s):  
Šárka Keprdová ◽  
Jiří Bydžovský
Keyword(s):  
Building Materials ◽  
Acoustic Properties ◽  
Filling Material ◽  
Insulation Material ◽  
Excellent Performance ◽  
Insulating Material ◽  
Environmentally Sustainable ◽  
Composite Systems ◽  
Natural Composite ◽  
Insulating Properties

Combining air or hydraulic binders with hemp shives, we can gain a set of new building materials. These products achieve excellent performance characteristics for durable, environmentally sustainable buildings. Being together, these products create natural composite building material that can be used to create insulating elements for walls, floors and roofs and also to create excellent thermal and acoustic properties of the buildings. Hemp insulation material is created by connection of technical hemp shives with a binder consisting of cement and calcium hydroxide. The production process may vary depending on whether the hemp is mineralized or not. It can be generally said that dry components should be mixed at first (binder and shives) and then water should be added. During the production, all components of insulating material must be perfectly mixed. The paper deals with the proposal and testing of new hemp insulation composites. Tests of the hemp insulation described in this paper are not typical representatives of the tests of insulation materials. Due to the doubts about the insulating properties of the proposed material, there was testing carried out in such the ways as if it was the filling material based on lightweight concretes.

scholarly journals The The Occurrence of Thermal Bridges in Hemp-Lime Construction Junctions

2019 ◽  
Author(s):  
Magdalena Grudzińska ◽  
Przemysław Brzyski
Keyword(s):  
Energy Efficient ◽  
Composite Structures ◽  
Building Materials ◽  
Thermal Transmittance ◽  
Timber Frame ◽  
Energy Efficient Buildings ◽  
Moisture Condensation ◽  
Thermal Bridges ◽  
Frame Construction ◽  
Insulating Properties

Thermal bridges increase heat losses in buildings and reduce the temperature of the internal envelope surface, causing moisture condensation and mould growth. This is an important issue for building materials based on organic components such as a hemp-lime composite, as they are particularly susceptible to biological degradation.The hemp-lime composite is used as a filling in timber frame construction. The increased cross-section of wooden elements together with the geometry change in the construction joints can form thermal bridges. The paper presents numerical analyses of temperature distribution in the area of construction elements connections, taking into account several variants of junctions: external walls, corners, and window placement in a wall. The thermal parameters of hemp-lime composites used in the analyses were obtained from the authors’ own research.Despite relatively good insulating properties, timber elements have a noticeable influence on the local increase of the heat transfer in hemp-lime composite structures, forming thermal bridges in the partitions themselves and in the construction nodes. However, the linear thermal transmittance coefficients in the presented joints were not very significant (in the range of 0.026 ÷ 0.092 W/(m·K) depending on the type of connection), proving the usefulness of this type of construction in energy-efficient buildings.

Study of Heat Transfer Process in Structure of Thermal Insulating Materials Based on Natural Fibers

2014 ◽  
Vol 1000 ◽  
pp. 227-230 ◽  
Author(s):  
Jiri Zach ◽  
Jitka Peterková ◽  
Martin Sedlmajer ◽  
Azra Korjenic
Keyword(s):  
Building Materials ◽  
Natural Fibers ◽  
Natural Fibre ◽  
Heat Transfer Process ◽  
Heat Propagation ◽  
Natural Fibres ◽  
Low Carbon ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Insulating Properties

Natural fibre based thermal insulating materials belong to progressive building materials representing one of the possible ways in sustainable development and which are characterised with low carbon trace and low value of primary bound energy. In case of industrially produced insulating materials (for instance using thermal connection method) the insulating materials based on natural fibres showed comparable properties with industrially produced insulating materials on building markets. In the view of thermal insulating properties the natural insulating material show slightly different behaviour in comparison with synthetic insulating materials which is caused by fibrous structure of insulating materials and low thermal conductivity of natural fibres (contrary to glass or mineral fibres). The paper describes results of research oriented on study of heat propagation within materials based on natural fibres originated from agriculture and stockbreeding.

scholarly journals POSSIBILITIES OF USING WOOD WASTE FOR BUILDING MATERIALS PRODUCTION

2021 ◽  
Author(s):  
A. Shinkaruk ◽  
V. Danilov ◽  
Arkadiy Ayzenshtadt
Keyword(s):  
Composite Material ◽  
Waste Disposal ◽  
Building Materials ◽  
Wood Waste ◽  
Operational Characteristics ◽  
Insulating Properties

The analysis of the amount of wood waste generated, its types and possible uses of such waste is carried out. The technological features of the production of wood-mineral composite based on wooden bark and basalt waste with heat and sound insulating properties are given. It is shown that, depending on the selected ratio of the components of the mixture, a composite with specified operational characteristics can be obtained.Production of a new composite material is designed to expand the range of eco-friendly building materials in Russia, and also to solve the problem of wood waste disposal.

scholarly journals Electrical Impedance Used for Measurement of Moisture Distribution in Thermal Insulation Plasters

2019 ◽  
Author(s):  
Jitka Peterková ◽  
Martin Sedlmajer ◽  
Magdaléna Michalčíková ◽  
Jana Pařílková
Keyword(s):  
Thermal Insulation ◽  
Electrical Impedance ◽  
Building Materials ◽  
Negative Influence ◽  
Moisture Distribution ◽  
Masonry Construction ◽  
Thermal Insulating ◽  
Non Destructive ◽  
Insulating Properties

High moisture in building materials has a negative influence on their physical and thermal insulating properties. When building materials incorporated in a structure exceed the maximum permissible moisture, the material could change its properties to such an extent that its next usage is unfeasible. In case of thermal insulating materials, it causes serious degradation of thermal insulating properties. During the development of advanced thermal insulation plasters, long-term laboratory experiments were performed using masonry construction fragments, which focused on the study of their moisture proportions. For this purpose a new non-destructive method of electrical impedance was used, which enables measurements on defined levels in a matrix of test samples. Results obtained by measurements made on the surface of the samples were compared with the results obtained by a capacitive hygrometer. It was concluded that these methods provided similar results. The least moisture sensitive was the mixture, which was applied on masonry pillar E. In comparison with used thermal insulation plasters commonly used today this plaster shows considerably lower value of mass moisture under laboratory conditions, 1.38%. This pillar also exhibited the most uniform course of conductance measured along its height. 

scholarly journals A Study of Sandwich Reinforced Concrete – Foamed Concrete Floor Slabs

2021 ◽  
Vol 1203 (3) ◽  
pp. 032038
Author(s):  
Justyna Sobczak-Piąstka ◽  
Oksana Lytvyniak ◽  
Andrii Kramarchuk ◽  
Borys Ilnytskyy ◽  
Yuriy Famulyak
Keyword(s):  
Reinforced Concrete ◽  
Experimental Determination ◽  
Building Materials ◽  
Functional Performance ◽  
High Heat ◽  
Concrete Floor ◽  
Floor Slabs ◽  
Foamed Concrete ◽  
Insulating Properties

Abstract The development of housing construction demands an application of building materials which ensure necessary functional performance of structures, have high heat-insulating properties, are environmentally friendly and their use is economically appropriate. Simultaneous ensuring of mentioned indices is possible because of complex combined joining of building materials with different physical-mechanical properties. This article presents experimental determination of useful load for sandwich reinforced concrete – foamed concrete floor slabs. Sandwich reinforced concrete – foamed concrete floor slabs are the floor slabs which are composed of normal concrete, non-autoclaved foamed concrete and spatial reinforcement frame. Experimental determination of useful load was carried out on series that compose of four sandwich reinforced concrete – foamed concrete floor slabs. Experimental test of sandwich reinforced concrete – foamed concrete floor slabs was carried out under condition of pure bending that was achieved by applying to floor slab in one third of its span two concentrated forces equal in magnitude. Useful load for sandwich reinforced concrete – foamed concrete floor slabs was 33.23÷77.87 kN/m2. Sandwich reinforced concrete – foamed concrete floor slabs are proposed to be used in construction of housing and social structures.

Study of Hygrothermal Behavior of Insulation Materials Based on Natural Fibers

2015 ◽  
Vol 1124 ◽  
pp. 97-102
Author(s):  
Jiri Zach ◽  
Jitka Peterková
Keyword(s):  
Building Materials ◽  
Natural Fibers ◽  
Natural Fibre ◽  
Heat Propagation ◽  
Natural Fibres ◽  
Low Carbon ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Hygrothermal Behavior ◽  
Insulating Properties

Natural fibre based thermal insulating materials belong to progressive building materials representing one of the possible ways in sustainable development and which are characterised with low carbon trace and low value of primary bound energy. In case of industrially produced insulating materials (for instance using thermal connection method) the insulating materials based on natural fibres showed comparable properties with industrially produced insulating materials on building markets. In the view of thermal insulating properties the natural insulating material show slightly different behavior in comparison with synthetic insulating materials which is caused by fibrous structure of insulating materials and low thermal conductivity of natural fibres (contrary to glass or mineral fibres). The paper describes results of research oriented on study of heat propagation within materials based on natural fibres originated from agriculture and stockbreeding.

scholarly journals Thermal Insulating Properties of Straw-Filled Environmentally Friendly Building Materials

2017 ◽  
Vol 13 (1) ◽  
pp. 52-57 ◽  
Author(s):  
Rositsa Petkova-Slipets ◽  
Penka Zlateva
Keyword(s):  
Thermal Conductivity ◽  
Composite Materials ◽  
Energy Efficient ◽  
Building Materials ◽  
Thermal Conductivity Coefficient ◽  
Environmentally Friendly ◽  
Thermal Insulating ◽  
Insulating Properties ◽  
Thermal Physical Properties

AbstractThe paper presents results of a research for determination of a few general thermal-physical properties of environmentally friendly building materials made by clay, sand and straw. The aim of this study is to establish their heat insulating and energy-efficient capacity. All specific measurements were carried out by using the newest generation thermal conductivity analyser Mathis TCi.The results showed that the studied composite materials are good thermal insulators with thermal conductivity less than 0.5 W/m.K, which depends on the straw amount. Even less than 0.5 wt.% straw reflects on the insulating properties by decreasing the thermal conductivity coefficient with nearly 50 %.

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