effects of ultrafine materials on workability and strength

Properties of Hardened Concrete Strength, Sjrinkage

Following are the factors that affect the strength of concrete 1. Water-Cement ratio 2. Type of cementing material 3. Amount of cementing material 4. Type of aggregate 5. Air content 6. Admixtures. 1. Water-Cement ratio It is water cement ratio that basically governs the property of strength. Lesser the water cement ratio, greater will be strength. 2.

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Effect of Ripe and Unripe Plantain Peel Ash on Concrete

Effect of Ripe and Unripe Plantain Peel Ash on Concrete Workability and Compressive Strength Plantain (Musa paradisiaca) peels are by-product of plantain fruits, constituting about 40% of the fruits. Performance effects of Ripe Plantain peel ash (RPPA) and Unripe Plantain peel ash (UPPA) in concrete were investigated in this research.

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Effect of Boron Content on Carbon Steel Welds

strength of boron steel welds was superior to boron-free steel welds, boron's strengthening effect was greatly dependent upon the amount of boron present in the weld. In fact, J. H. DEVLETIAN is Assistant Professor of Materials Science, Youngstown State Uni­ versity, Youngstown, Ohio, and R. W. HEINE is Professor of Metallurgical En­

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Effect of Heat Treatment on Mechanical Properties and

Effect of Heat Treatment on Mechanical Properties The effect of heat treatment (annealing, normalising, hardening, and tempering) on the mechanical properties (ultimate tensile strength, hardness, toughness, percentage elongation, and percentage reduction) of the treated and

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Effect of Cold Work on the Tensile Properties of 6061

samples is also a form of cold work. Cold work has a. significant effect on the mechanical properties of alloys and. predictions can be made concerning the properties if the. amount of cold work is known (Ref 1). In this study, the effect of cold work on the tensile properties. of aluminum alloys was evaluated.

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3D-Printed High-Performance Titanium-Copper Alloys for

The work was part of a project funded by the Australian Research Council. The study 'Additive manufacturing of ultrafine-grained high-strength titanium alloys' is published in Nature with DOI 10.1038/s41586-019-1783-1. RMIT researchers involved in the multi-partner collaboration Dr. Dong Qiu, Professor Mark Easton and Dr. Duyao Zhang.

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Published in Zeitschrift für Naturforschung A · 2010Authors Adnan Calik · Akin Duzgun · O Sahin · N UcarAbout Yield · Solid solution strengthening · Elongation · Ultimate tensile strength

Properties and Uses of Different Types of Concrete Admixtures

Possible adverse effects of retarders. 1. Reduce early age strength. 2. Reduction of time between initial and final set. Possible advantages of retarders. Air entrainment. Increased workability. Reduction of time between initial and final set.

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Property Modification Strengthening/Hardening

Therefore, smaller grains improve the strength of a material. The size and number of grains within a material is controlled by the rate of solidification from the liquid phase. Strain Hardening Strain hardening (also called work-hardening or cold-working) is the process of making a metal harder and stronger through plastic deformation.

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EXPERIMENTAL STUDY OF EFFECT OF ARTIFICIAL SAND

As an importance of the use of waste materials, number of research is currently being conducted concerning the use of artificial sand in increasing the workability and strengthening of reinforced cement concrete and plain cement concrete members. The main disadvantages of concrete are brittleness, low tensile strength, less resistance

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Enhanced strengthductility synergy in ultrafine-grained

Jan 30, 2019 · It is known that grain refinement to the nano/ultrafine-grained regime can render material stronger, but this process is usually accompanied by a dramatic loss of ductility 1,2,3,4,5. However

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The effects of water-cement ratio and chemical admixtures

The effects of water-cement ratio and chemical admixtures on the workability of concrete. Ali M Mansor 1, Ruben Paul Borg 2, Ahmed M M Hamed 2, Mohammed M Gadeem 1 and Mansour M Saeed 1. Published under licence by IOP Publishing Ltd IOP Conference Series Materials Science and Engineering, Volume 442, conference 1

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Cutting Tool Applications, Chapter 3 Machinability of

The following eight factors determine the condition of the work material microstructure, grain size, heat treatment, chemical composition, fabrication, hardness, yield strength and tensile strength. Microstructure The microstructure of a metal refers to its crystal or grain structure as shown through examination of etched and polished

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Effects of Warm-Mix Asphalt Additives on Workability and

Their workability, bulk specific gravity, indirect tensile strength at 0°C, and moduli at 0°C, 26.7°C, and 50°C were determined. The effects of different amounts of WMA additives were compared. The results showed that workability of the RAP HMA improved with the addition of Sasobit H8 or Advera zeolite at temperatures as low as 110°C.

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Effect of Superplasticizer on Workability of Concrete

3.3 Splitting-Tensile Strength Fig 4 shows the effect of superplasticizer on the splitting-tensile strength which illustrates that the splitting tensile strength are increase by 3 and 5% with addition of 0.25% and 0.5% of superplasticizer respectively, and then decrease slightly with 0.75% and 1% addition of superplasticizer concrete.

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() EXPERIMENTAL STUDY OF EFFECT OF ARTIFICIAL

Any Civil Engineering Structure must rest on a Structures are founded with concrete and steel materials mainly. Traditionally, concrete is mixture of cement, sand and aggregate. EXPERIMENTAL STUDY OF EFFECT OF ARTIFICIAL SAND AND AGGREGATES ON COMPRESSIVE STRENGTH AND WORKABILITY OF CONCRETE EXPERIMENTAL STUDY OF EFFECT OF ARTIFICIAL

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Effect of Heat Treatments on Fatigue Failure and

Most of the tensile strength (R common application is metallurgical research but heat treatment can also be used in manufacturing of alumin- ium, glass, steel and other. Heat treatment involves the use of heating or cooling, usually to extreme positive and negative temperatures to achieve the required re- sult.

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Chapter 3 Fly Ash in Portland Cement Concrete Fly Ash

Fly ash particles react with free lime in the cement matrix to produce additional cementitious material, and thus, to increase long-term strength. Fly Ash Properties. Fineness. The fineness of fly ash is important because it affects the rate of pozzolanic activity and the workability of the concrete.

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Cutting Tool Applications, Chapter 3 Machinability of

The following eight factors determine the condition of the work material microstructure, grain size, heat treatment, chemical composition, fabrication, hardness, yield strength and tensile strength. Microstructure The microstructure of a metal refers to its crystal or grain structure as shown through examination of etched and polished surfaces under a microscope.

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Material Matters Accelerators NPCA

Nov 17, 2015 · Combinations of different accelerators mixed in manufacturer-specified ratios could also be used, depending on job specifications and how all the raw materials and chemicals interact. It is important to test different products in test batches to determine which combinations work best with the materials being used.

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Effect of Addition of Fly Ash on Workability of Concrete

Effect of Addition of Fly Ash on Workability of Concrete Anuj Kumar, Dr. R. K. Tewatia . same strength thus saving of raw materials such as limestone, coal etc required for manufacture of cement. When 5% fly ash is added to the concrete then the strength and workability both increases but when we add 10% and 15% at

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EFFECTS OF FLY ASH ON CONCRETE PROPERTIES

It is generally agreed that the use of fly ash, particularly as an admixture rather than as a replacement of cement, reduces, segregation and bleeding. If the sand is coarse the addition of fly ash produces beneficial results; for fine sands, its addition may increase the water requirement for a given workability. 2. On Strength in Compression

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Effect of Carbon Content on the Mechanical

Effect of Carbon Content on the Mechanical Properties of Medium Carbon Steels Adnan Calika, Akin Duzgunb,OsmanSahinc, and Nazim Ucard a Department of Mechanical Education, Technical Education Faculty, Suleyman Demirel University, Isparta, Turkey b Engineering Faculty, Civil Engineering Department, Ataturk University, Erzurum, Turkey

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Ppt ON ADMIXTURES SlideShare

May 11, 2015 · Series No 1 (workability series) A. EFFECT ON WORKABILITY AND COMPRESSIVE STRENGTH Slump tests were carried out Cubes [6*6*6] were tested at the ages of 3,7,28 days. a. Mix proportion 124 Test results showing effect of super plasticizers on compressive strength and workability at constant w/c ratio.

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Effects of Pitch-Based Short Carbon Fibers on the

Abstract Pitch is a viscoelastic polymer material consisting of aromatic hydrocarbons. It is used to produce carbon fibers with sheet-like crystal structures. The aim of the work presented in this paper was to evaluate the effects of pitch-based short carbon fibers on the workability, unit weight, and air content of freshly mixed mortar

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Materials Science and Engineering What is the effect of

Feb 18, 2016 · It is little bit difficult to answer directly. Reducing the grain size normally increase the amount of grain boundaries which increase the resistance to flow and make the material harden faster if you deform. Hence there should be an inverse relat

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Effects of steel slag powder on workability and durability

Abstract. The workability and durability of a type of sustainable concrete made with steel slag powder were investigated. The hydrated products of cement paste with ground granulated blast furnace slag (GGBFS) alone or with a combined admixture of GGBFS-steel slag powder were investigated by X-ray diffraction (XRD).

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Early age strength and workability of slag pastes

The effects of preblended gypsum dosage within the slag as well as the effect of ultrafine slag on workability are reported. The results of trials with various water-reducing admixtures and superplasticizers and their effects on strength and workability are reported.

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Published in World Academy of Science, Engineering and Technology, International Journal of EnviAuthors M Fadhil Nuruddin · Demie · M Fareed Ahmed · Nasir Shafiq

Effects of nanosilica addition on workability DeepDyve

Oct 01, 2012 · Read "Effects of nanosilica addition on workability and compressive strength of Portland cement pastes, Construction and Building Materials" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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MANUFACTURING PROPERTIES of ENGINEERING

larger than the yield strength by a factor ranging from 1.1 to 3. Ductility The tensile ductility is the permanent increase in length of a tensile specimen before fracture, expressed as a fraction of the original gauge length. Ductility is the ability of a material to undergo large plastic deformation without fracture or failure. It can also

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RETRACTED Assessment of the effects of Fe2O3

RETRACTED Assessment of the effects of Fe 2 O 3 nanoparticles on water permeability, workability, and setting time of concrete Ali Nazari and Shadi Riahi Journal of Composite Materials

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