Application Prospect of Basalt Fabrics Wall Material

2012 ◽  
Vol 204-208 ◽  
pp. 3974-3977
Author(s):  
Xin E Li
Keyword(s):  
High Performance ◽  
Sound Absorption ◽  
High Strength ◽  
Cementitious Materials ◽  
Wall Material ◽  
Sound Insulation ◽  
Light Weight ◽  
Wall Materials ◽  
Heat Preservation ◽  
High Sound

Functions of the wall and some of wall materials are introduced. Basalt filaments possess excellent properties with high strength, high temperature resistance, corrosion resistance, small hygroscopicity, small thermal conductivity and high sound absorption coefficient. High performance basalt fabrics can be gelatinized into compound cementitious materials with cement or gypsum. The performance of basalt compound boards mainly rely on the performance of basalt filaments. So basalt compound boards possess excellent characteristics with light-weight, high strength, fire prevention, sound insulation and heat preservation. It is green initiative and easy construction as new wall materials. Basalt compound cementitious materials possess good application prospect in the wall materials along with the development of production technology.

A Summary of Strength Formation Mechanism of Light Wall Material

2012 ◽  
Vol 217-219 ◽  
pp. 1099-1102
Author(s):  
Xue Wang ◽  
Yuan Chen Guo
Keyword(s):  
Theoretical Basis ◽  
High Strength ◽  
Foam Plastic ◽  
Raw Material ◽  
Wall Material ◽  
Light Weight ◽  
Ordinary Temperature ◽  
Mineral Powder ◽  
Wall Materials ◽  
Temperature And Pressure

The lisht wall material is one of the major trends of wall materials currently Light weight wall material is made of active mineral powder as a main raw material and P. O cement as a cementious material. Spent foam plastic and some admixtures were added, foamed and cured in the nature under the ordinary temperature and pressure condition. The article introduces and analyzes exhaustively the strength mechanism of lisht wall material and prepares theoretical basis for the preparation of high-strength lisht wall material.

Application of Combined Casting-Forging Process for Production of Durable Lightweight Aluminum Parts

2013 ◽  
Vol 554-557 ◽  
pp. 264-273 ◽  
Author(s):  
Stanislav Dedov ◽  
Gunter Lehmann ◽  
Rudolf Kawalla
Keyword(s):  
Heat Treatment ◽  
High Performance ◽  
High Strength ◽  
High Energy ◽  
Process Efficiency ◽  
Light Weight ◽  
Technological Chain ◽  
Process Chains ◽  
Coupled Process ◽  
Hardening Heat Treatment

Due to the constant development in the automotive industry, where high performance shared with the maximal comfort and safety at low car body weight are the primary goals, gains the lightweight construction in importance. Materials with light weight, high strength and toughness are being engaged. With this background the material aluminum and its alloys become highly attractive to manufacturers. There are mainly two ways of forming the metal materials: casting or forming. Apart from substitution of one method by another there are also many examples of combining of casting and forging processes in practice. Such approach allows using the advantages of both methods, shortening the process chains and saving energy and resources at the same time. Furthermore the form flexibility can be increased and the product quality can be improved. For higher process efficiency a direct transition from casting to forging operation should be applied, so that the heat loss decreases and no additional heat treatment between these operations is necessary. There are processes known, which allow producing the final parts by casting and forging from one a single heat. The application of such processes requires materials, which have simultaneously good casting and forging properties. The Institute of Metal forming TU Freiberg works intensively on development of combined casting-forging technologies for lightweight aluminum parts. A technological chain for this coupled process followed by precipitation hardening heat treatment was developed (Figure 1). Heat treatable aluminum cast and wrought alloys with 1 – 7 % silicon were applied. By the variation of silicon content the optimal cast, forging and hardening properties were achieved. This technology with high energy efficiency allows producing durable light weight parts from aluminum alloys while the mechanical properties of the final parts are equal to or even higher than those in the conventional processes.

Repair of Severely Damaged Reinforced Concrete Beams with High-Strength Cementitious Grout

2020 ◽  
Vol 2674 (6) ◽  
pp. 372-384
Author(s):  
Antoine N. Gergess ◽  
Mahfoud Shaikh Al Shabab ◽  
Razane Massouh
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Cementitious Materials ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Rc Structures

High-strength cementitious materials such as high-performance concrete are extensively used for retrofit of reinforced concrete (RC) structures. The effectiveness of these materials is increased when mixed with steel fibers. A commonly used technique for strengthening and repair of RC beams consists of applying high-performance fiber-reinforced concrete jackets around the beam perimeter. This paper investigates the jacketing method for repairing severely damaged RC beams. Four 2 m (6 ft 63/4 in.) long rectangular RC beams, 200 × 300 mm (8 ×12 in.) were initially cast and loaded until failure based on three-point bending tests. The four beams were then repaired by thickening the sides of the damaged RC beams using a commercially available high-strength shrinkage grout with and without steel fibers. Strain and deformation were recorded in the damaged and repaired beams to compare structural performance. It is shown that the flexural strength of the repaired beams is increased and the crack pattern under loading is improved, proving that the proposed repair method can restore the resistance capacity of RC beams despite the degree of damage. A method for repair is proposed and an analytical investigation is also performed to understand the structural behavior of the repaired beams based on different thickening configurations.

A Novel Thermal Insulation, Sound Absorption and Decoration Material

2011 ◽  
Vol 383-390 ◽  
pp. 3922-3928
Author(s):  
H.B. Zhu ◽  
P.M. Wang ◽  
C.S. Wang ◽  
G.T. Yan ◽  
Y.S. Cheng ◽  
...  
Keyword(s):  
Sound Absorption ◽  
Cavity Resonator ◽  
Building Energy ◽  
Short Fiber ◽  
Building Energy Efficiency ◽  
Sound Absorber ◽  
The World ◽  
Novel Material ◽  
Heat Preservation ◽  
High Sound

Both of noise and building energy efficiency are attached importance to in the world. A novel material is developed to control noise, save building energy and decorate for buildings. Porous absorber, cavity resonator resonance sound absorber, film resonance sound absorber, functional absorber and high sound absorber are utilized to improve the sound absorbability. Perlite, Ordinary Portland cement, silicon fume, re-dispersible emulsion powder or emulsion, air-entraining agent, superplasticizer, short fiber and mesh fabrics are used to prepare novel material. Organic silicone waterproof material is used to prevent it from destroying, assist for sound absorbability and decorate for surface. After designing wedge sound absorber by mould, forming cavity resonator resonance sound absorber by air-entraining agent, and controlling compression ratio, diameter of perlite grain and cement dosage, final performances of sound absorbability and heat preservation can meet requirements of ASTM C423-84A and GB/T 20473-2006 respectively.

scholarly journals Review of The Cement-Based Composite Ultra-High-Performance Concrete (UHPC)

2019 ◽  
Vol 13 (1) ◽  
pp. 147-162 ◽  
Author(s):  
Edwin Paul Sidodikromo ◽  
Zhijun Chen ◽  
Muhammad Habib
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Cementitious Materials ◽  
Vital Role ◽  
Engineering Industry ◽  
Supplementary Cementitious Materials ◽  
Ultra High Performance Concrete ◽  
Strength Concrete ◽  
Normal Strength

Introduction: Ultra-High-Performance Concrete (UHPC) is an advanced type of concrete in the Civil Engineering industry. It is a cement-based composite which exhibits improved mechanical and durable properties showing a high compressive strength of not less than 150 MPa and high tensile strength of not less than 7 MPa. Objective: In this article, a review of the use of a different type of supplementary cementitious materials (SCMs) including fibers is made for obtaining the desired UHPC. Discussion and Conclusion: For this, it is vital to understand the principles of UHPC. UHPC has several advantages over normal strength concrete (NSC) and high strength concrete (HSC) with some commercially ready UHPC’s available, but the use of it is restricted due to the limited design codes. The influence of the curing type also plays a vital role in the overall performance of UHPC.

Development of High-Strength Foamed Concrete Compositions

2021 ◽  
Vol 320 ◽  
pp. 186-190
Author(s):  
Eva Namsone ◽  
Genadijs Sahmenko ◽  
Elvija Namsone ◽  
Aleksandrs Korjakins
Keyword(s):  
High Performance ◽  
High Strength ◽  
Sound Insulation ◽  
Capillary Porosity ◽  
Hydrothermal Conditions ◽  
Experimental Part ◽  
Mineral Components ◽  
Foamed Concrete ◽  
Concrete Mixer ◽  
Aerated Concrete

Unlike traditional materials, the development of high-performance foamed concrete with a compressive strength of up to 20 MPa and a density of up to 1400 kg/m3 allows the use of foamed concrete as a constructive material with additional functions including good thermal insulation properties, sound insulation and capillary porosity needed to ensure hydrothermal conditions. Unlike autoclaved aerated concrete, foamed concrete can also be used in monolithic construction.The studies of high strength foamed concrete were performed by using mostly local mineral components and mixing technology by using planetary activator which provides a fundamentally new mixing mode that combines intensive mixing, foaming and activation of components. To realize the experimental part of the research, turbulence type foamed concrete mixer SPBU-LUKS was used.

Cable-Stayed Footbridge with UHPC Segmental Deck

2014 ◽  
Vol 629-630 ◽  
pp. 64-70 ◽  
Author(s):  
Milan Kalný ◽  
Vaclav Kvasnička ◽  
Jan Komanec ◽  
Jan L. Vítek ◽  
Robert Broz ◽  
...  
Keyword(s):  
Life Cycle Cost ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Light Weight ◽  
Ultra High Performance Concrete ◽  
Ongoing Research ◽  
The Czech Republic ◽  
The Public ◽  
Design And Implementation

Ongoing research and development of ultra-high performance concrete (UHPC) in the Czech Republic has been utilized in design and implementation of light-weight segmental deck of the cable-stayed footbridge over the Labe River in Celakovice with main span of 156 m. Detailing, design issues, construction method and efficiency of using UHPC on this large span lightweight bridge is described in the paper. The superstructure of the Celakovice footbridge was completed in the December 2013 and the bridge was opened for the public in April 2014. Main advantages of this project is not only low maintenance and reasonable life cycle cost but also favourable tender price which was achieved by the contractor Metrostav a.s. due to combination of high-strength modern materials steel and UHPC.

Experimental Research on the Mechanic Performance of the Cavity Wall Material

2012 ◽  
Vol 476-478 ◽  
pp. 1657-1660
Author(s):  
Cheng Fang Sun ◽  
Hui Qin Wu
Keyword(s):  
High Strength ◽  
Steel Frame ◽  
Cavity Wall ◽  
Wall Material ◽  
Sound Insulation ◽  
Good Prospect ◽  
Fine Aggregate ◽  
Frame Building ◽  
Result Show ◽  
Wire Meshes

As a new high strength and environmental protection material, the cavity wall material has attracted increasing attention. It is made from paper with alveolus triangle inside. It has two talent rights in China, which one is “A kind of Composite Paper Technique with High Strength”; another is “A Kind of Cavity Composite Material with Alveolus Triangle inside”. As the infilling-wall of the steel frame building, the cavity composite masonry is made of the cavity material as the core wall and between two sides of fine aggregate concrete with wire-meshes, which can increase the bearing capacity and stiffness of the steel frame, and improve ductility and earthquake resistant behavior. In this paper, the mechanic performance of the cavity wall material is tested. Test result show that the cavity wall material has many good performance including lightweight, high-strength, heat insulation and sound insulation, and is a kind of good infilling wall material of the steel frame building. Therefore, the cavity wall material has a good prospect of application and extension.

scholarly journals Non Monotonous Effects of Noncovalently Functionalized Graphene Addition on the Structure and Sound Absorption Properties of Polyvinylpyrrolidone (1300 kDa) Electrospun Mats

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 108 ◽  
Author(s):  
Giuseppe Del Sorbo ◽  
Greta Truda ◽  
Aurelio Bifulco ◽  
Jessica Passaro ◽  
Giuseppe Petrone ◽  
...  
Keyword(s):  
Conformational Changes ◽  
Smart Materials ◽  
High Performance ◽  
Sound Absorption ◽  
Piezoelectric Materials ◽  
Fibre Diameter ◽  
Strain Sensors ◽  
Stimuli Responsive ◽  
Graphene Content ◽  
High Sound

Graphene is an attractive component for high-performance stimuli-responsive or ‘smart’ materials, shape memory materials, photomechanical actuators, piezoelectric materials and flexible strain sensors. Nanocomposite fibres were produced by electrospinning high molecular weight Polyvinylpyrrolidone (PVP-1300 kDa) in the presence of noncovalently functionalised graphene obtained through tip sonication of graphite alcoholic suspensions in the presence of PVP (10 kDa). Bending instability of electrospun jet appears to progressively increase at low graphene concentrations with the result of greater fibre stretching that leads to lower fibre diameter and possibly conformational changes of PVP. Further increase of graphene content seams having the opposite effect leading to greater fibre diameter and Raman spectra similar to the pure PVP electrospun mats. All this has been interpreted on the basis of currently accepted model for bending instability of electrospun jets. The graphene addition does not lower the very high sound absorption coefficient, α, close to unity, of the electrospun PVP mats in the frequency range 200–800 Hz. The graphene addition affects, in a non-monotonous manner, the bell shaped curves of α versus frequency curves becoming sharper and moving to higher frequency at the lower graphene addition. The opposite is observed when the graphene content is further increased.

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