Utilization of Recycled Fine-Ground Concrete from Railway Sleepers for Production of Cement-Based Binder

2013 ◽  
Vol 486 ◽  
pp. 323-326 ◽  
Author(s):  
Martin Lidmila ◽  
Pavel Tesárek ◽  
Tomáš Plachy ◽  
Zuzana Rácová ◽  
Pavel Padevět ◽  
...  
Keyword(s):  
Material Properties ◽  
Cost Reduction ◽  
Bending Strength ◽  
Civil Engineering ◽  
Environmental Awareness ◽  
New Materials ◽  
Potential Cost ◽  
Curing Conditions ◽  
Secondary Use

The environmental awareness and potential cost reduction have promoted the recycling of materials in civil engineering. This paper is dealing with the recycling and secondary use of old concrete railway sleepers for reconstruction of old railway lines. In particular, it is focused on the investigation of material properties of a binder prepared from finely crushed old concrete sleepers. This material could be used for strengthening of subsoil and embankments supporting the railway structures. The study shows that the compressive and bending strength of the investigated material is sufficient for this purpose and that the strength can be further increased by suitable curing conditions. These findings could contribute to the utilization of old concrete sleepers during railway reconstructions and safe money spent for the purchase of new materials and disposal of old sleepers.

Materials technology: Innovations and progress

Impact ◽  
2020 ◽  
Vol 2020 (2) ◽  
pp. 52-53
Author(s):  
Lucy Sharp
Keyword(s):  
Material Properties ◽  
New Materials ◽  
Medical Problems ◽  
Technology Innovations ◽  
Societal Challenges ◽  
New Material ◽  
Innovative Materials ◽  
The Creation ◽  
Novel Applications

Materials technology is a constantly evolving discipline, with new materials leading to novel applications. For example, new material properties arise from combining different materials into composites. Researching materials can help solve societal challenges, with the creation of innovative materials resulting in breakthroughs in overcoming hurdles facing humankind, including energy challenges and medical problems. Innovative materials breathe new life into industries and spur on scientific and technological discovery.

Material Properties and Design Aspects of Folding Bicycle Frame

2011 ◽  
Vol 264-265 ◽  
pp. 777-782 ◽  
Author(s):  
M.A. Maleque ◽  
M.S. Hossain ◽  
S. Dyuti
Keyword(s):  
Material Properties ◽  
Raw Material ◽  
New Materials ◽  
Materials Properties ◽  
Advantages And Disadvantages ◽  
Bicycle Frame ◽  
Successful Design ◽  
Future Direction ◽  
The Relationship ◽  
Comprehensive Study

successful design of folding bicycle should take into account the function, material properties, and fabrication process. There are some other factors that should be considered in anticipating the behavior of materials for folding bicycle. In order to understand the relationship between material properties and design of a folding bicycle and also for the future direction in new materials with new design, a comprehensive study on the design under different conditions are essential. Therefore, a systematic study on the relationship between material properties and design for folding bicycle has been performed. The advantages and disadvantages matrix between conventional bicycle and folding bicycle is presented for better understanding of the materials properties and design. It was found that the materials properties of the folding bicycle frame such as fatigue and tensile strength are the important properties for the better performance of the frame. The relationship between materials properties and design is not straight forward because the behavior of the material in the finished product could be different from that of the raw material. The swing hinge technique could be a better technique in the design for the folding bicycle frame.

CAD of Gating System for Injection Mold Based on the Secondary Development Technology of PRO/E

2010 ◽  
Vol 148-149 ◽  
pp. 453-457
Author(s):  
Zheng Hao Ge ◽  
Yi Qu ◽  
Ya Nan Zhou
Keyword(s):  
Flow Rate ◽  
Material Properties ◽  
Cost Reduction ◽  
Secondary Development ◽  
Injection Mold ◽  
Gating System ◽  
Second Development ◽  
Development Technology ◽  
Pressure Fall

The gating system is usually made up of the sprue, the runner, the gate and the slag well. It is an important component of the mold. On the basis of relationship among runner’s geometry, the pressure fall of plastic melt flowing in runner, flow rate and material properties, we can use the UDF library features and Pro / Toolkit functions in PRO / E software to do the second development of PRO / E software. As a result, we can establish the CAD module of gating system for the injection mold. The module has the perfect function and good generality and can help the designer for cost reduction. It may be used whenever you want to use. The PRO / E software has a powerful function to design mold. Taking these as a base, it is very convenient for the module to design the gating system of injection mold.

scholarly journals William Henry Glanville, 1 February 1900 - 30 June 1976

1977 ◽  
Vol 23 ◽  
pp. 91-113
Keyword(s):  
Civil Engineer ◽  
World War I ◽  
Civil Engineering ◽  
Practical Experience ◽  
New Materials ◽  
World War ◽  
Queen Mary College ◽  
Wrought Iron ◽  
Modern Age ◽  
Army Service

Sir William Glanville, who died on 30 June 1976, was a pioneer in the modern age of civil engineering which developed after World War I. Before that, apart from the introduction of new materials, cast iron, wrought iron, mild steel and reinforced concrete, all of which in their turn, in the hands of brilliant and daring designers, made new forms of structure possible, there had been little advance in the basic art of the civil engineer for a hundred years. Truly empirical methods, which were so valuable in the development of mechanical and electrical engineering, were ruled out by the magnitude of the products—roads, bridges, dams, sea defences and the like—of what is now classed as civil engineering, while the dearth of suitable instruments had made full-scale testing impossible. William Henry Glanville, who was born on 1 February 1900, was the only son of a London builder of Cornish extraction. He was educated at Kilburn Grammar School and after a brief period of army service at the end of World War I he became a student at East London College (Queen Mary College), University of London, from which he graduated in 1922 with a first class honours degree in civil engineering. Instead of seeking practical experience on site or in the office of a practising civil engineer he took what was then the unusual step of going straight into a research establishment.

scholarly journals Properties of orb weaving spider glycoprotein glue change during Argiope trifasciata web construction

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Brent D. Opell ◽  
Sarah D. Stellwagen
Keyword(s):  
Young’S Modulus ◽  
Material Properties ◽  
Prey Capture ◽  
Young's Modulus ◽  
Progressive Increase ◽  
New Materials ◽  
Web Documents ◽  
Aqueous Layer ◽  
Argiope Trifasciata ◽  
Web Construction

AbstractAn orb web’s prey capture thread relies on its glue droplets to retain insects until a spider can subdue them. Each droplet’s viscoelastic glycoprotein adhesive core extends to dissipate the forces of prey struggle as it transfers force to stiffer, support line flagelliform fibers. In large orb webs, switchback capture thread turns are placed at the bottom of the web before a continuous capture spiral progresses from the web’s periphery to its interior. To determine if the properties of capture thread droplets change during web spinning, we characterized droplet and glycoprotein volumes and material properties from the bottom, top, middle, and inner regions of webs. Both droplet and glycoprotein volume decreased during web construction, but there was a progressive increase in the glycoprotein’s Young’s modulus and toughness. Increases in the percentage of droplet aqueous material indicated that these increases in material properties are not due to reduced glycoprotein viscosity resulting from lower droplet hygroscopicity. Instead, they may result from changes in aqueous layer compounds that condition the glycoprotein. A 6-fold difference in glycoprotein toughness and a 70-fold difference in Young’s modulus across a web documents the phenotypic plasticity of this natural adhesive and its potential to inspire new materials.

Use of Separated Dust from the Formatting and Grinding Cement-Bonded Chipboards to Modify their Composition

2015 ◽  
Vol 1122 ◽  
pp. 225-228
Author(s):  
Tomáš Melichar ◽  
Dalibor Konečný ◽  
Jiří Bydžovský ◽  
Miroslav Vacula
Keyword(s):  
Tensile Strength ◽  
Material Properties ◽  
Bending Strength ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Suitability Assessment ◽  
Dust Treatment ◽  
Plate Plane

The article presents results of the research focused on suitability assessment of separated dust from formatting and grinding of cement-bonded chipboards to modify their composition. The attention was paid to dust treatment, i.e. milling and sorting. The dust was applied to chipboards in amounts of 5 and 10%. Formulas with water-cement ratio 0.60 and 0.65 were prepared. The influence of sorted dust was subsequently evaluated using setting of selected material properties. In particular the bending strength and tensile strength perpendicular to plate plane were monitored including the influence of frost on these characteristics.

scholarly journals Crystalline Structure, Synthesis, Properties and Applications of Potassium Hexatitanate: A Review

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4132 ◽  
Author(s):  
Patricia Ponce-Peña ◽  
Martha Poisot ◽  
Alicia Rodríguez-Pulido ◽  
María Azucena González-Lozano
Keyword(s):  
Material Properties ◽  
Mechanical Performance ◽  
Synthesis Method ◽  
Tunnel Structure ◽  
Chemical Formula ◽  
New Materials ◽  
Structure Synthesis ◽  
Synthesis Properties ◽  
New Applications ◽  
Potassium Hexatitanate

Potassium hexatitanate (PHT) with chemical formula K2Ti6O13 has a tunnel structure formed by TiO2 octahedra sharing edges or corners and with the potassium atoms located in the tunnels. This material has attracted great interest in the areas of photocatalysis, reinforcement of materials, biomaterials, etc. This work summarizes a large number of studies about methods to prepare PHT since particle size can be modified from millimeter to nanometric scale according to the applied method. Likewise, the synthesis method has influenced the material properties as band-gap and the final mechanical performance of composites when the reinforcement is PHT. The knowing of synthesis, properties and applications of PHT is worthwhile for the design of new materials and for the development of new applications taking advantage of their inherent properties.

Material Properties of Large-Size Tire Derived Aggregate for Civil Engineering Applications

2015 ◽  
Vol 27 (9) ◽  
pp. 04014258 ◽  
Author(s):  
Il-Sang Ahn ◽  
Lijuan Cheng ◽  
Patrick J. Fox ◽  
Joaquin Wright ◽  
Stacey Patenaude ◽  
...  
Keyword(s):  
Material Properties ◽  
Civil Engineering ◽  
Engineering Applications ◽  
Large Size ◽  
Tire Derived Aggregate

Prospects for Chemical Control and Engineering of Organically Modified Ceramics

1998 ◽  
Vol 550 ◽  
Author(s):  
Stephen E. Rankin ◽  
Alon V. McCormick
Keyword(s):  
Material Properties ◽  
Chemical Control ◽  
Sol Gel ◽  
Polymer Structure ◽  
New Materials ◽  
Reliable Model ◽  
Organically Modified ◽  
Silicon Alkoxides ◽  
Simple Pair ◽  
Kinetics Of

AbstractHydrolytic polycondensation of silicon alkoxides and organically modified alkoxides shows promise as a route to new materials for medicine. Mathematical models of this polymerization accelerate the development of these materials and processes for their production. With a reliable model, one can rapidly explore a wide variety of options for controlling material properties. Here we describe a model for kinetics of sol-gel copolymerization of a simple pair of ethoxysilanes: (CH3)3Si(OC2H5) and (CH3)2Si(OC2H5)2. We then describe how reactor configuration alone can be used to control of polymer structure by choosing how to mix the reactants. An example is shown of maximizing homogeneity at any reactor residence time of interest in the model copolymer system by using the time of addition of the faster-reacting monomer.

Hall Effect Measurements on New Thermoelectric Materials

2003 ◽  
Vol 793 ◽  
Author(s):  
Jarrod Short ◽  
Sim Loo ◽  
Sangeeta Lal ◽  
Kuei Fang Hsu ◽  
Eric Quarez ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Hall Effect ◽  
Measurement System ◽  
Material Properties ◽  
Figure Of Merit ◽  
New Materials ◽  
Temperature Dependent ◽  
Additional Insight ◽  
Hall Effect Measurements

ABSTRACTIn the field of thermoelectrics, the figure of merit of new materials is based on the electrical conductivity, thermoelectric power, and thermal conductivity of the sample, however additional insight is gained through knowledge of the carrier concentrations and mobility in the materials. The figure of merit is commonly related to the material properties through the B factor which is directly dependent on the mobility of the carriers as well as the effective mass.To gain additional insight on the new materials of interest for thermoelectric applications, a Hall Effect system has been developed for measuring the temperature dependent carrier concentrations and mobilities. In this paper, the measurement system will be described, and recent results for several new materials will be presented.

Sign in / Sign up

Export Citation Format

Share Document