Influence of internal thermal insulation on the sound insulation of walls

2022 ◽  
pp. 193-218
Author(s):  
Berndt Zeitler
Keyword(s):  
Thermal Insulation ◽  
Sound Insulation

Study on Properties of Foam Concrete Based on Fractal Theory

2011 ◽  
Vol 194-196 ◽  
pp. 1916-1919 ◽  
Author(s):  
Wen Ling Tian ◽  
Jiang Bo Yang ◽  
Xiao Yan Zhao
Keyword(s):  
Fractal Dimension ◽  
Fly Ash ◽  
Thermal Insulation ◽  
Fractal Theory ◽  
High Strength ◽  
Sound Insulation ◽  
Foam Concrete ◽  
Insulation Property ◽  
Foaming Agent ◽  
Thermal Insulation Property

Foam concrete is provided with light weight, thermal insulation, sound insulation and fire resistance, good seismic performance and other characteristics. To improve properties of foam concrete microstructure is studied with the help of fractal theory, fractal dimension related to mechanical properties and thermal performance of foam concrete is calculated by MATLAB language program. The results indicate that the microstructure of foam concrete showed significant fractal character, the fractal dimension is between 1.3 and 2.0. Apparent density, 28d compressive strength, and thermal conductivity decreases with the increase of fly ash and foaming agent content, fractal dimension increased. Formulas of fractal dimension and the fly ash, foaming agent content were established. Foam concrete with low density, high strength, and good thermal insulation property will be prepared conducted by the formulas.

Measuring the sound insulation of an external thermal insulation composite system (ETICS) by means of vibrometry

2017 ◽  
Vol 141 (5) ◽  
pp. 3595-3595
Author(s):  
Daniel Urbán ◽  
Bert Roozen ◽  
Alexander Niemczanowski ◽  
Herbert Muellner ◽  
Peter Zaťko
Keyword(s):  
Thermal Insulation ◽  
Composite System ◽  
Sound Insulation

Research on the Performance of Silt Sintered Insulating Brick and Key Molding Equipment

2014 ◽  
Vol 919-921 ◽  
pp. 2002-2006
Author(s):  
Hong Mei Liu ◽  
Yuan Bin Xu ◽  
Cheng Qun Wu ◽  
Ai Dong Zhu ◽  
Jun Qiu Zuo
Keyword(s):  
Thermal Insulation ◽  
Structural Design ◽  
Building Materials ◽  
High Strength ◽  
Sound Insulation ◽  
Critical Part ◽  
Research Status ◽  
Future Developments ◽  
Important Position

Silt sintered insulating brick with high strength, good thermal insulation and sound insulation characteristics. It occupies an important position in the new building materials industry. The main equipment for production of silt sintered insulating brick is the vacuum brick extruding machine, the forming mold is the most critical part in it. The performance largely determines the quality of the brick. The structural design and other aspects of the forming mold are analyzed, and then systematically summarize the design and production requirements of the forming mold. The research status of the forming mold on vacuum brick extruding machine at domestic and abroad is reviewed. The main problems of forming mold are analyzed and the corresponding solutions are given, as well as the future developments of forming mold.

scholarly journals INVESTIGATION OF PROPERTIES OF MODIFIED BASALT FIBERS

2018 ◽  
Vol 4 ◽  
pp. 43-48
Author(s):  
Volodymyr Gots ◽  
Petr Palchyk ◽  
Oksana Berdnyk
Keyword(s):  
Thermal Insulation ◽  
Operating Temperature ◽  
Structural Characteristics ◽  
Basalt Fiber ◽  
Acoustic Properties ◽  
Sound Insulation ◽  
Porous System ◽  
Basalt Fibers ◽  
Insulation Materials ◽  
Continuous Basalt Fiber

Thermophysical, physical-mechanical and acoustic characteristics of a rough continuous basalt fiber under the influence of operating factors and a corrosive environment are studied. It is shown that the production of protective materials with high thermophysical and acoustic properties is possible when creating a porous system with a known texture characteristic of pores of different classes, purposes and connections. An influence of the porous system of rough continuous basalt fiber on the operational properties of flexible heat and sound insulation products and materials is studied. The requirements of normative documents on thermal protection of buildings and structures have caused a constant tendency from the creation of new materials that ensure reliable operation of structures and equipment in the conditions of intensive influence of destructive factors of external influence. This led to an increase in requirements for walling wall materials that are used to fill openings in frame construction, or as an independent structural and thermal insulation material when building buildings with load-bearing walls. They are presented with a set of requirements that combines: physical and mechanical, chemical, hygienic, thermophysical, decorative and finishing, and other properties of the material. In this connection, there is a need to create materials that, having a small average density and high strength, are able to withstand the temperature loads, and the influence of an aggressive environment. It is determined that the performance characteristics of flexible heat and sound insulation materials are directly proportional to the degree of porosity of the composite materials and their structural characteristics. It is shown that the increase in the operating temperature of these materials, sound and thermal resistance is determined by the chemical and mineralogical composition of the initial materials and their structural characteristics. The influence of the mechanism of selective leaching of coarse continuous basalt fibers on their texture characteristics and the operating temperature zone is studied. The resulting material is produced from environmentally friendly raw materials using a one-stage technology without harmful effects on the environment and, unlike thermal insulation materials based on polymers or asbestos, has no harmful effect on the human body, meets the requirements of the European Union for the protection of the environment and sanitary and hygienic standards.

Review of research on basalt fibers and basalt fiber-reinforced composites in China (I): Physicochemical and mechanical properties

2020 ◽  
pp. 096739112097739
Author(s):  
Li Yan ◽  
Faliang Chu ◽  
Wanyong Tuo ◽  
Xiaobo Zhao ◽  
Yan Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Insulation ◽  
Sound Absorption ◽  
Acid Corrosion ◽  
Glass Fibers ◽  
Basalt Fiber ◽  
Research Progress ◽  
Sound Insulation ◽  
Basalt Fibers ◽  
Hygroscopic Properties

This paper reviewed the research progress in China on the durability, acid and alkali corrosion resistances, thermal insulation, sound insulation, and hygroscopic properties of basalt fibers (BFs) as well as the physicochemical and mechanical properties of BF-reinforced resin composites. The acidity coefficient and pH value of BFs and glass fibers (GFs) were tested, which showed that BFs had better chemical stability. Scanning electron microscopy observations showed that the acid corrosion of BFs gradually occurred from the outside to the inside, whereas the alkali corrosion of BFs occurred nearly simultaneously both inside and outside. Moreover, the reasons for these results were analyzed from a chemical reaction perspective. BFs met the thermal conductivity and sound absorption coefficient requirements of building thermal insulation and sound absorption materials. The hygroscopicity of BFs was 1/8–1/6 that of GFs, and BFs also had a smaller dielectric loss angle. Tests confirmed that BFRC exhibited great high-temperature resistance. As the short BF content increased, the flexural strength, splitting tensile strength and impermeability of BFRC significantly improved, and an optimal fiber length and content were proposed. A comparison showed that the mechanical properties of BF-reinforced resin were generally better than those of GF-reinforced resin. Finally, this review identified some concepts to be studied in this field and prospects for possible future research directions. [Formula: see text]

Application of Composite Sandwich Panels in Construction Engineering

2013 ◽  
Vol 291-294 ◽  
pp. 1172-1176 ◽  
Author(s):  
Ke Wei Ding ◽  
Gang Wang ◽  
Wan Yun Yin
Keyword(s):  
Thermal Insulation ◽  
Sandwich Panels ◽  
Constructional Material ◽  
Structural Safety ◽  
Sound Insulation ◽  
Engineering Practice ◽  
Construction Engineering ◽  
Composite Sandwich Panels ◽  
Composite Sandwich ◽  
Practical Engineering

As a new constructional material, composite sandwich panels are applied in engineering more often than ever. This paper focuses on the structure and foreign research status of sandwich panels which are used in practical engineering problems that need attention. The structure of the composition of the sandwich panel, force characteristics and analysis methods, a set of load-bearing thermal insulation, sound insulation and decoration in one of the new sandwich insulation composite wall form, can comprehensively address architectural, structural safety, and contradict the thermal insulation performance and durability problem. Thus they can be better applied to the engineering practice and meet the development requirement of building energy-saving and adaptation of housing industrialization.

Development of Out-Wall External Thermal Insulation System Based on Rock-Wool

2012 ◽  
Vol 174-177 ◽  
pp. 1589-1592
Author(s):  
Ming Gang Xu ◽  
Xu Wang ◽  
Zhuo Wei Ding
Keyword(s):  
Thermal Insulation ◽  
Thermal Conductivity Coefficient ◽  
Outer Wall ◽  
Sound Insulation ◽  
Insulation System ◽  
Stable Chemical ◽  
Insulation Systems ◽  
Saving Measure ◽  
Insulation Performance ◽  
Rock Wool

The outer-wall thermal insulation system has been wide used in civil engineering as an effective energy-saving measure. At present, the organic flammable thermal insulation materials such as EPS and XPS are used in outer-wall thermal insulation system in China, which leads to great fire damage probably. The rock-wool is described in detail on its merits such as good thermal insulation performance, good sound insulation performance, light weight, low thermal conductivity coefficient, incombustibility, innocuity and stable chemical capability. Two popular outer-wall external thermal insulation systems are introduced. The construction sequence of the outer-wall external thermal insulation system with rock-wool slabs, mortar and thin layer plastering technology is described.

scholarly journals Multicriteria assessment of selected types of ceilings

2018 ◽  
Vol 219 ◽  
pp. 04011
Author(s):  
Julia Nowak ◽  
Edyta Plebankiewicz
Keyword(s):  
Comparative Analysis ◽  
Thermal Insulation ◽  
Execution Time ◽  
Lower Surface ◽  
Sound Insulation ◽  
Multicriteria Assessment ◽  
Comparison Criteria

The paper compares three systems of the rib-and-slab ceiling: Vector, Rector and Teriva. The following comparison criteria were selected: the tare weight of ceiling beams, execution time, slab faulting, sound insulation, thermal insulation and aesthetics of the lower surface. The results of the multicriteria comparative analysis clearly indicated the advantage of the Vector ceiling, assuming the same weights for all criteria taken into account.

scholarly journals Preparation and thermal insulation performance of cast-in-situ phosphogypsum wall

2018 ◽  
Vol 16 (1_suppl) ◽  
pp. 81-92
Author(s):  
Yubo Li ◽  
Shaobin Dai ◽  
Yichao Zhang ◽  
Jun Huang ◽  
Ying Su ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Green Building ◽  
Building Construction ◽  
Sound Insulation ◽  
Performance Tests ◽  
Method Of Calculation ◽  
Ansys Simulation ◽  
Insulation Performance ◽  
The Heat Transfer Coefficient

Introduction: The mass accumulation of phosphogypsum has caused serious environmental pollution, which has become a worldwide problem. Gypsum is a kind of green building material, which is lighter, has better heat and sound insulation performance, and is easier to recycle compared to cement. The application of cast-in-situ phosphogypsum wall could consume a large amount of pollutant, and improve the efficiency of building construction. Methods: The preparation and thermal insulation performance of cast-in-situ phosphogypsum wall were investigated. The property of phosphogypsum–fly ash–lime (PFL) triad cementing materials, the adaptability of retarders and superplasticizers, and the influences of vitrified microsphere as aggregates were explored. Thus, the optimum mix was proposed. Thermal insulation performance tests and ANSYS simulation of this material was carried out. Results: Optimal structures based on heat channels and the method of calculation determining related parameters were proposed, which achieved a 12.3% reduction in the heat transfer coefficient of the wall. Conclusion: With good performance, phosphogypsum could be used in cast-in-situ walls. This paper provides the theoretical basis for the preparation and energy-saving application of phosphogypsum in the walls of buildings.

scholarly journals Acoustic and Thermal Insulation of Nanocomposites for Building Material

2020 ◽  
Vol 17 (2) ◽  
pp. 0494
Author(s):  
Shanaz Ahmad et al.
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Volume Fraction ◽  
Sound Intensity ◽  
Polymeric Composite ◽  
Weight Fraction ◽  
Sound Insulation ◽  
Nano Clay ◽  
Hybrid Reinforcement ◽  
Optimum Sample

This work aims to enhance acoustic and thermal insulation properties for polymeric composite by adding nanoclay and rock wool as reinforcement materials with different rations. A polymer blend of (epoxy+ polyester) as matrix materials was used. The Hand lay-up technique was used to manufacture the castings. Epoxy and polyester were mixed at different weight ratios involving (50:50, 60:40, 70:30, 80:20, and 90:10) wt. % of (epoxy: polyester) wt. % respectively. Impact tests for optimum sample (OMR), caustic and thermal insulation tests were performed. Nano clay (Kaolinite) with ratios ( 5 and 7.5% ) wt.% , also hybrid reinforcement materials involving (Kaolite 5 & 7.5 % wt.% + 10% volume fraction of rockwool ) were added as reinforcement materials to the optimum sample. Results of impact test prove that the optimum sample has (80:20) wt. % of mixing ratio of (epoxy: polyester) wt. % for using as matrix materials. Moreover, the adding of nanoclay (Kaolinite) with ratio (7.5 wt.%) leads to the highest sound insulation. The sound intensity started at (99.8) db at 100 Hz, and reached to (101.3) db at 10000 Hz., which is much lower than the values obtained from the un-reinforced blend, of which the sound intensity started at (107.2) db and reached to (108.7) db., at the same range of frequencies. Thermal conductivity results show that the optimum matrix with (7.5 %) wt. % has the lowest value about (0.443 k.w\m .c).         The results show that the blend reinforced with nano clay in a weight fraction (7.5)% has the best sound insulation, so that the sound intensity started at (99.8) db at 100 Hz., and reached (101.3) db at 10000 Hz., which is much lower than the values obtained from the unreinforced blend, of which the sound intensity started at (107.2) db and reached (108.7) db., applying the same range of frequencies. The same casting (blend+7.5% nanoclay) showed the lowest value of thermal conductivity (xxxx) W.m°C in comparison with castings that were made of unreinforced blend and those  hybridized with rockwool.

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