scholarly journals Review of Application and Innovation of Geotextiles in Geotechnical Engineering

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1774 ◽  
Author(s):  
Hao Wu ◽  
Chongkai Yao ◽  
Chenghan Li ◽  
Miao Miao ◽  
Yujian Zhong ◽  
...  
Keyword(s):  
Soil Pollution ◽  
High Performance ◽  
Low Cost ◽  
Geotechnical Engineering ◽  
Drainage System ◽  
High Strength ◽  
Present Situation ◽  
Soft Foundation ◽  
And Function ◽  
Erosion Protection

Most geotextiles consist of polymers of polyolefin, polyester or polyamide family, which involve environmental problems related to soil pollution. Geotextiles can be used for at least one of the following functions: Separation, reinforcement, filtration, drainage, stabilization, barrier, and erosion protection. Due to the characteristics of high strength, low cost, and easy to use, geotextiles are widely used in geotechnical engineering such as soft foundation reinforcement, slope protection, and drainage system. This paper reviews composition and function of geotextiles in geotechnical engineering. In addition, based on literatures including the most recent data, the discussion turns to recent development of geotextiles, with emphasis on green geotextiles, intelligent geotextiles, and high-performance geotextiles. The present situation of these new geotextiles and their application in geotechnical engineering are reviewed.

SUSTAINABLE ULTRA-HIGH-PERFORMANCE GLASS CONCRETE FOR INFRASTRUCTURES

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Arezki Tagnit-Hamou ◽  
Nancy A. Soliman
Keyword(s):  
High Performance ◽  
Glass Powder ◽  
Mechanical Performance ◽  
High Performance Concrete ◽  
Low Cost ◽  
Research Work ◽  
High Strength ◽  
Quartz Powder ◽  
Ultra High Performance Concrete ◽  
Powder Particles

This paper presents research work on the development of a green type of ultra-high-performance concrete using ground glass powders with different degrees of fineness (UHPGC). This article presents the development of an innovative, low-cost, and sustainable UHPGC through the use of glass powder to replace cement, and quartz powder particles. An UHPGC with a compressive strength (fc) of up to 220 MPa was prepared and its fresh, and mechanical properties were investigated. The test results indicate that the fresh UHPGC properties were improved when the cement and quartz powder were replaced with non-absorptive glass powder particles. The strength improvement can be attributed to the glass powder’s pozzolanicity and to its mechanical performance (very high strength and elastic modulus of glass). A case study of using this UHPGC is presented through the design and construction of a footbridge. Erection of footbridge at University of Sherbrooke Campus using UHPGC is also presented as a full-scale application.

scholarly journals The Low Cost, High Performance Material for Automotive Application

2019 ◽  
Vol 9 (2S2) ◽  
pp. 1084-1087
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
Low Cost ◽  
High Strength ◽  
Automotive Application ◽  
Compression Moulding ◽  
Moulding Process ◽  
Fiber Metal Laminate ◽  
Wide Range ◽  
Fiber Metal

Recently, composite materials are used in various automotive applications. The reasons for composite materials are low weight and can withstand high strength. The present work focuses on the preparation and characterization of some advanced Fiber metal laminate (FML) like Al/BF with epoxy, Al/CF with epoxy, Al/GF with epoxy and its automotive application. Fiber metal laminate is the arrangement of metal fiber, resin in required stacking order. The required fiber metal laminate was fabricated using compression moulding process and the samples were subjected to wide range of mechanical and thermo mechanical characterizations such as tensile strength, impact, erosion wear and flammability test respectively. All the tests are done as per ASTM standards. The applicability and replaceability of the material with conventional automotive materials were studied and results were tabulated

SOME KEY ISSUES AND ACCESSES TO THE APPLICATION OF MAGNESIUM ALLOYS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2237-2242 ◽  
Author(s):  
YUAN HAO ◽  
TIJUN CHEN ◽  
YING MA ◽  
YUANDONG LI ◽  
FENGYUN YAN ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
High Strength ◽  
Az91d Alloy ◽  
Effective Surface ◽  
Forming Technology ◽  
The Status ◽  
Micro Arc Oxidation ◽  
Key Issues ◽  
Mould Casting

The status of Mg alloy application, and then some key issues limiting their applications and the corresponding accesses were briefly discussed. It was supposed that development of new alloys with high performance and low cost, investigating advanced forming technology, and development of credible and effective surface modification technologies and related equipment were the urgent tasks in present. Correspondingly, three aspects of researches were carried out. (1) A new alloy with high strength and elongation, but low RE and Zn contents, named ZW21, was invented. (2) Semisolid ingots of AZ91D, AM60 and ZW21 alloys available for thixoforming were prepared. Thixoforming increased the ultimate tensile strength of AZ91D alloy by 20% compared with permanent mould casting. (3) A new kind of micro arc oxidation equipment with a capacity of treating 6m2 surface was developed and has been used to treating motorcycle hub of magnesium alloy.

Nanostructured Materials Prepared by Mechanical Alloying and Mechanochemical Process

2009 ◽  
Vol 283-286 ◽  
pp. 90-97 ◽  
Author(s):  
Ali Shokuhfar ◽  
Bahman Nasiri-Tabrizi
Keyword(s):  
Electron Microscopy ◽  
Mechanical Alloying ◽  
High Performance ◽  
Milling Time ◽  
Powder Processing ◽  
Low Cost ◽  
Research Work ◽  
High Strength ◽  
High Energy ◽  
Nanocrystalline Hydroxyapatite

Mechanical alloying and mechanochemical treatment are the major powder processing techniques on the nano scale. In these processes a high energy ball mill has been applied to synthesize compounds and nanocomposites such as aluminum metal matrix nanocomposite, hydroxyapatite and bionanocomposites based on hydroxyapatite. These processes involve deformation, cold welding, fracturing, and rewelding of powder particles. Due to the applied mechanical forces, chemical reactions and phase transformations could also take place. In the present research work, the effects of milling time, milling media, and sonication process on the microstructures and morphology of the obtained materials were evaluated by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The results indicate that increasing the milling time leads to an increased lattice strain and decreased crystallite sizes. Furthermore, the results show that the sonication process leads to the morphological improvement of nanocrystalline hydroxyapatite. The obtained data show that the nanocrystalline hydroxyapatite with low contamination and suitable morphology can be produced in Polyamide6 vials similar to stainless steel vials, therefore it seems that using polymeric and polymeric based nanocomposite vials with high strength and wear resistance could lead to a new way for the mass production of nanocrystalline hydroxyapatite with high performance, low contamination and low cost.

scholarly journals Recent Progress in Understanding the Nano/Micro-Mechanical Behavior of Austenite in Advanced High Strength Steels

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1927
Author(s):  
Qingwen Guan ◽  
Wenjun Lu ◽  
Binbin He
Keyword(s):  
Mechanical Behavior ◽  
High Performance ◽  
Recent Progress ◽  
Low Cost ◽  
High Strength Steels ◽  
High Strength ◽  
Small Scale ◽  
Advanced High Strength Steels ◽  
Dislocation Plasticity ◽  
Austenite Grains

Advanced high strength steels (AHSS) are developed to reduce vehicle weight without sacrificing passenger safety. The newly developed AHSS frequently incorporates the austenite as the intrinsic component with large amount and good stability, which is realized by carefully designed alloying elements and thermo-mechanical processing. To explore the great potential of austenite in enhancing the strain hardening behavior of AHSS, detailed information on the mechanical behavior of single austenite grain is a prerequisite, which can be collected by a small-scale test. The present work reviews the recent progress in understanding the nano/micro-mechanical behavior of austenite in varied AHSS. Three different plasticity modes including dislocation plasticity, martensitic transformation, and deformation twinning can be observed in the austenite grains during small-scale tests, given proper stacking fault energy and crystal orientation. The remaining issues concerned with the nano/micro-mechanical behavior of austenite are discussed. The present review advances the general understanding of the nano/micro-mechanical behavior of austenite grains in AHSS, which may shed light on the precise austenite engineering with the development of new AHSS, realizing the dream of high-performance steels at low cost.

High Performance of Stone Chippings Concrete with High Fine Content

2013 ◽  
Vol 357-360 ◽  
pp. 909-916
Author(s):  
Shi Lin Tan ◽  
Xin Bang Ding ◽  
Xue Qin Jiang
Keyword(s):  
High Performance ◽  
Design Method ◽  
Low Cost ◽  
Chloride Ion ◽  
High Strength ◽  
Mineral Admixtures ◽  
Fine Content ◽  
River Sand ◽  
Slag Powder ◽  
Chloride Ion Penetration

In order to make full use of stone chippings, alleviate the contradiction of increased demand and supply shortage of river sand. On the basis of the method of dense aggregate packing, this paper explores a way utilizing stone chippings with high fine content(more than 10% fine content), poor graded crushed stone, grade II flyash and S95 slag powder to prepare HPC with stone chippings 100% replacing river sand. The experiment results show that this mix design method is feasible, and its designed concrete has good workability, high dosage of mineral admixtures, high strength, high chloride ion penetration resistance, low cement content, low cost and so on.

MR Fluid Sponge Materials and Devices

2000 ◽  
Author(s):  
J. David Carlson ◽  
Michael J. Chrzan
Keyword(s):  
High Performance ◽  
Low Cost ◽  
High Strength ◽  
Mr Fluid ◽  
Mr Fluids ◽  
Control Authority ◽  
Degree Of Control ◽  
New Generation ◽  
High Degree ◽  
Cost Components

Abstract Stable, high-strength, magnetorheological (MR) fluids and devices such as rotary brakes and linear vibration dampers that enable the benefits of controllable fluid technology are now commercially available. Recently, a new way of using MR fluids in which the fluid is contained in an absorbent matrix has been developed. Such MR fluid sponge devices enable the benefits of controllable MR fluids to be realized in cost sensitive applications. Most of the high-cost components normally associated with a fluid filled device can be eliminated with this approach. Low-cost, controllable MR fluid sponge dampers are particularly appropriate for moderate-force vibration control problems where a high degree of control authority is desired such as a new generation of high-performance, home washing machines now being developed.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

BERYLCO 25

Alloy Digest ◽  
1973 ◽  
Vol 22 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
High Performance ◽  
High Strength ◽  
Heat Treating ◽  
Beryllium Copper

Abstract BERYLCO 25 is the standard high-performance beryllium copper alloy most widely used because of its high strength, hardness and excellent spring characteristics. BERYLCO 25 is the updated version of BERYLCO 25S (Alloy Digest Cu-3, November 1952). This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-271. Producer or source: Kawecki Berylco Industries Inc..

INCONEL ALLOY X-750

Alloy Digest ◽  
1966 ◽  
Vol 15 (7) ◽  
Keyword(s):  
Gas Turbines ◽  
Rupture Strength ◽  
Low Cost ◽  
High Strength ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Cryogenic Temperatures ◽  
Inconel Alloy ◽  
Nickel Chromium ◽  
Corrosion And Oxidation

Abstract INCONEL alloy X-750 is an age-hardenable, nickel-chromium alloy used for its corrosion and oxidation resistance and high creep rupture strength at temperature up to 1500 F. It also has excellent properties at cryogenic temperatures. It was originally developed for use in gas turbines, but because of its low cost, high strength and weldability it has become the standards choice for a wide variety of applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep and fatigue. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-115. Producer or source: Huntington Alloy Products Division, An INCO Company.

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