Bond strength of highvolume fly ash concrete
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Bond strength of highvolume fly ash concrete.

Bond strength of high-volume fly ash concrete

BOND STRENGTH OF HIGH-VOLUME FLY ASH CONCRETE by MICHAEL HAYSE WOLFE A THESIS Presented to the Faculty of the Graduate School of the MISSOURI UNIVERSITY OF SCIENCE AND

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"Bond strength of high-volume fly ash concrete" by Michael ...

Sep 27, 2014  Replacement of cement with fly ash, an industrial waste product, offers a sustainable alternative. The goal of this research was to explore the feasibility of using

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(PDF) Bond Behavior of High-Volume Fly Ash Concrete

The effects of addition of fly ash and temperature on compressive strength, shrinkage and bond strength of concrete were investigated. In this study, two

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A comparative study of the bond strength of reinforcing ...

Mar 01, 2013  When a significant amount of fly ash is used, how it contributes to the strength development of the concrete and the hydration characteristics of this type of

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(PDF) An Experimental Study on Bond Strength of ...

International Journal of Concrete Structures and Materials Vol.6, No.3, pp.187–197, September 2012 DOI 10.1007/s40069-012-0017-9 ISSN 1976-0485 / eISSN 2234-1315 An

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Setting Time, Strength, and Bond of High-Calcium Fly Ash ...

Jul 07, 2015  The results indicated that fresh geopolymer concrete had short setting time of 28–58 min due to the presence of high calcium content of fly ash. In general

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Mechanical Properties of High-Volume Fly Ash Strain ...

Aug 16, 2019  Fly ash proved to be beneficial in the improvement of tensile and flexural ductility, but an extremely high volume of fly ash can provide only limited

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(PDF) An Experimental Study on Bond Strength of ...

An experimental investigation was conducted to compare the bond strength of reinforcing steel in high-volume fly-ash concrete (HVFAC)—concrete with at least 50 % of the cement replaced with fly ...

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Bond strength of high-volume fly ash concrete - CORE Reader

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Engineered Cementitious Composites with High-Volume Fly

a high percentage of potential substitution by relatively low quality CCPs without significant compromise of strength development. In contrast, the emerging high performance, high volume fly ash (HVFA) concrete, 10 which may contain 50 to 60% fly ash by mass of total cementitious material, requires high-quality fly ash with low carbon content and

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Mechanical Properties of High Volume Fly Ash (HVFA) and ...

of cement with high volume fly ash at elevated temperature up to 120˚C.The main Mechanical Properties of High Volume Fly Ash (HVFA) and Concrete Subjected 243 parameters studied were compressive strength, split tensile strength, modulus of

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Fly Ash Concrete - an overview ScienceDirect Topics

In table 1 and 2 and figure 3 the linear relationship between water/cement ratio and compressive strength are given for a reference and fly ash concrete. According to the standards a maximum water/cement ratio of 0.65 is allowed. This agrees with a water/cement ratio for fly ash concrete of 0.72 and a water/cement + fly ash ratio of 0.58.

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CONCRETE Optimizing the Use of Fly Ash in Concrete

hydration products. If the calcium content of the fly ash is high enough, it is possible to make concrete with moderate strength using the fly ash as the sole cementing material (Cross 2005). In addition to providing an indication of the mineralogy and reactivity of the fly ash, the calcium content is also useful in predicting how effective

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High strength concrete properties, admixture, and mix ...

High strength concrete is a useful material for high-rise buildings, long-span bridges, heavy-duty industrial floors, pre-stressed concrete, etc. Concrete is a mixture of cement, water, coarse and fine aggregates with or without chemical and mineral admixtures. As aggregate covers 75 percent of the volume of concrete, for HSC, high-strength ...

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Setting Time, Strength, and Bond of High-Calcium Fly Ash ...

Jul 07, 2015  The results indicated that fresh geopolymer concrete had short setting time of 28–58 min due to the presence of high calcium content of fly ash. In general, strengths and modulus of elasticity increased with the increase in NaOH concentration. For compressive strength, the optimum Na 2 O content was around 12% of fly ash. The high-strength ...

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The Disadvantages of Fly Ash in Concrete Hunker

Fly ash is a byproduct from coal-fired power plants that is frequently used as an admixture in concrete to replace a portion of the Portland cement. Using fly ash in concrete is environmentally beneficial because it reduces the Portland cement (a major contributor of CO2) required in concrete.

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A comparative study of the bond strength of reinforcing ...

One method of reducing concrete’s contribution to greenhouse gas emissions is the use of fly ash to replace a significant amount of the cement. An experimental investigation was conducted to compare the bond strength of reinforcing steel in high-volume fly ash concrete (HVFAC) – concrete with at least 50% of the cement replaced with fly ash ...

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Effect of slag on the mechanical properties and bond ...

May 01, 2019  The fly ash used in this study was class F fly ash with a specific gravity of 2.61 g/cm 3 and fineness of 426 m 2 /kg, and it had CaO content of 11.8% (70%) and SO 3 of 0.45% as in compliance with ASTM C618 [].The slag used was GGBFS with a specific gravity of 2.50 g/cm 3 and a fineness of 455 m 2 /kg, and it had a CaO/SiO 2 ratio of 1.13

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Bond-slip behavior and embedment length of reinforcement ...

May 31, 2015  To investigate bond-slip behavior of reinforcement in high volume fly ash concrete (HVFAC), 189 pull-out specimens are studied under monotonic static load in this paper. The main research variables involve the volume of fly ash, the type and diameter of the steel bars and the water-to-cement ratio (w/c). The tensile loading in this study is applied to steel bar, which increases stably by ...

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Bond strength between blended slag and Class F fly ash ...

Jun 01, 2015  The 28-day bond strength and the overall bond stress–slip behaviour of the geopolymer concrete were similar to those previously reported for OPC-based concretes. Providing intensive heat curing, high early bond strength can be achieved showing that Class F fly ash geopolymer concrete is well suited for precast applications.

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Durability Study on High Calcium Fly Ash Based Geopolymer ...

Nov 26, 2015  This study presents an investigation into the durability of geopolymer concrete prepared using high calcium fly ash along with alkaline activators when exposed to 2% solution of sulfuric acid and 5% magnesium sulphate for up to 45 days. The durability was also assessed by measuring water absorption and sorptivity. Ordinary Portland cement concrete was also prepared as control concrete.

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Bond strength of high-volume fly ash concrete - CORE

Bond strength of high-volume fly ash concrete . By Michael Hayse Wolfe. Get PDF (4 MB) Abstract. Concrete is the most consumed man-made material in the world. Unfortunately, due to the production of cement, concrete has a large carbon footprint. Replacement of cement with fly ash, an industrial waste product, offers a sustainable alternative.

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Open Access proceedings Journal of Physics: Conference series

A Study on bond strength of normal concrete to high volume fly ash concrete J Naresh1, ... Review the bond strength at the concrete interfaces between traditional concrete and ash concrete.

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High-Volume Fly Ash Concrete for Sustainable Construction ...

Concrete with fly ash replacement levels of at least 50% – referred to as high-volume fly ash (HVFA) concrete – offers a potential green solution. The following study investigated the structural performance of HVFA concrete compared to conventional portland-cement concrete. Specifically, the research examined both the bond strength of ...

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Setting Time, Strength, and Bond of High-Calcium Fly Ash ...

The results indicated that fresh geopolymer concrete had short setting time of 28-58 min due to the presence of high calcium content of fly ash. In general, strengths and modulus of elasticity increased with the increase in NaOH concentration. For compressive strength, the optimum Na²O content was around 12% of fly ash. The high-strength ...

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Design and Evaluation of High-Volume Fly Ash (HVFA ...

Concrete is the most widely used man-made material on the planet. Unfortunately, producing Portland cement generates carbon dioxide (a greenhouse gas) at roughly a pound for pound ratio. High-volume fly ash (HVFA) concrete – concrete with at least 50% of the cement replaced with fly ash – offers a potential “green” solution.

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Use of High Volumes of Fly Ash to Improve ECC Mechanical ...

concrete. Traditionally, the replacement of cement by fly ash is limited to approximately 10 to 25% of the total cementitious materials.13,14 With the progress in water-reducing chemical additives, high volume fly ash (HVFA) structural concrete Title no. 104-M68 Use of High Volumes of Fly Ash to Improve ECC Mechanical Properties and Material ...

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The Effect of Fly Ash on the Bond Strength of Steel ...

Mar 18, 2021  Gopalakrishnan S et al (2005) Demonstration of utilising high volume fly ash based concrete for structural applications Structural Engineering Research Centre, Chennai India. Hadi MNS (2008) Bond of high strength concrete with high strength reinforcing steel. Open Civil Eng J 2:143–147. Article Google Scholar

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A Review of Strength and Durability Aspects of Concretes ...

2 天前  The bond strength of RAC mixes has been found to be about 35 % lower than that of NAF. ... After 28 days the compressive strength increased relatively more for high-volume fly ash concrete

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CONCRETE Optimizing the Use of Fly Ash in Concrete

hydration products. If the calcium content of the fly ash is high enough, it is possible to make concrete with moderate strength using the fly ash as the sole cementing material (Cross 2005). In addition to providing an indication of the mineralogy and reactivity of the fly ash, the calcium content is also useful in predicting how effective

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Concrete Mix Design Calculations

Mix design with Cement Fly Ash 133 lbs. fly ash 667 Total lbs. Cm = 20% ash It’s about volume! Note: lower water demand due to fly ash - for same slump Mix design with Cement Fly Ash Proportion the mix to yield 27 ft3 but how much sand, stone what ratio? Sand / Aggregate ratio is by volume It’s about volume!

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Fly Ash, Slag, Silica Fume, and Natural Pozzolans, Chapter 3

Fly ash is used in about 50% of ready mixed concrete (PCA 2000). Class F fly ash is often used at dosages of 15% to 25% by mass of cementitious material and Class C fly ash is used at dosages of 15% to 40% by mass of cementi-tious material. Dosage varies with the reactivity of the ash and the desired effects on the concrete (Helmuth 1987 and

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The Disadvantages of Fly Ash in Concrete Hunker

Fly ash is a byproduct from coal-fired power plants that is frequently used as an admixture in concrete to replace a portion of the Portland cement. Using fly ash in concrete is environmentally beneficial because it reduces the Portland cement (a major contributor of CO2) required in concrete.

Get Price

High strength concrete properties, admixture, and mix ...

High strength concrete is a useful material for high-rise buildings, long-span bridges, heavy-duty industrial floors, pre-stressed concrete, etc. Concrete is a mixture of cement, water, coarse and fine aggregates with or without chemical and mineral admixtures. As aggregate covers 75 percent of the volume of concrete, for HSC, high-strength ...

Get Price

Influence of Fly Ash on Slump Loss and Strength of ...

Fly ash can be used to increase the compressive strength of recycled aggregate concrete, depending on its fineness and the degree of fly ash replacement. The addition of fly ash with different fineness in recycled aggregate concrete had no significant effect on the splitting tensile strength and the modulus of elasticity of the recycled ...

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