Radwa_abdalhafz

الدكتورة / رضوة ضيف الله عبد الحافظ حسن

مدرس - مدرس بكلية التكنولوجيا والتعليم جامعة سوهاج

كلية التعليم الصناعى

العنوان: سوهاج

20

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2019 | الكلمات المفتاحية Geopolymer concrete, Ground gr,
EFFECT OF EXPOSURE TO ELEVATED TEMPERATURES ON GEOPOLYMER CONCRETE PROPERTIES
Abstract: Researchers head for replacing cement in concrete with materials with lower CO2 emissions and energy demand. Geopolymer concrete is environmental friendly concrete based on industrial solid wastes and by products just like Ground Granulated Blast Furnace Slag (GGBS) and Fly ash (FA). This research aims to produce geopolymer concrete using local available materials in Egypt and suits the structural ... إقراء المزيد

2019 | الكلمات المفتاحية Geopolymer concrete, conventio,
Analysis of Geopolymer Concrete Columns at Normal and High Strength
ABSTRACT: Geopolymer is an eco-friendly concrete replacement of Ordinary Portland concrete and possesses strength similar to or greater than the conventional concrete. Geopolymer concrete is a combination of fly ash or GGBS or both along with hydroxide and silicate solutions. In this paper, a combination of both fly ash and GGBS were used to make geopolymer concrete along with sodium ... إقراء المزيد

2019 | الكلمات المفتاحية KEYWORDS: Geopolymer concrete, ,
"Structural Behavior of Axially Loaded Geopolymer Reinforced Concrete Short Columns Subjected to Elevated Temperatures"
ABSTRACT: The current experimental study included testing ten geopolymer concrete short columns and ten conventional concrete short columns under vertical axial loads. In addition, the behavior of the tested columns was studied in terms of ultimate load , cracking loads , modes of failure, toughness, stiffness and ductility at ambient temperature and elevated temperature of 3000C &5000C for exposure periods ... إقراء المزيد

2016 | الكلمات المفتاحية
BEHAVIOR OF BEAMS REINFORCED BY SISAL AND FLAX ROPES AS REPLACEMENT OF REINFORCING STEEL
ABSTRACT: This research shows methods of using sisal and flax ropes as an alternative of steel bars reinforcement processing with chemical processing by chemical substance (kimapoxy 150), As they can be used instead of steel, they are with different ratios (25-50-75-100) % of steel value. Various tests were carried out as cold bending, bond strength test, tensile strength of ropes ... إقراء المزيد

2015 | الكلمات المفتاحية Percentages added, concrete mi,
PHYSICAL AND MECHANICAL PROPERTIES OF CONCRETE INCORPORATING INDUSTRIAL AND AGRICULTURAL TEXTILE WASTES
To reduce the impact on the environment, industrial and agricultural waste products such as carpet waste, sisal and flax have been added to the concrete. Usage of these materials in concrete does not only improve the strength of concrete but also leads to the proper disposal of these materials that leads to reduce the impact on environment. Fiber admixture can ... إقراء المزيد

2014 | الكلمات المفتاحية Percentages added, concrete mi,
Performance of Concrete Incorporating Industrial and Agricultural Wastes
ABSTRACT : Use of industrial and agricultural waste products such as (sisal, flax, glass fiber and Carpet wastes fiber). materials in concrete is not only improves the strength of concrete but, also leads to the proper disposal of these materials, resulting in reducing impact of these materials on environment. Fiber admix can effectively improve the mechanical properties of concrete. Utilization ... إقراء المزيد

| الكلمات المفتاحية KEYWORDS: Geopolymer Mortar, I,
Main factors affecting physical and mechanical characteristics of geopolymer mortar revealed by Egyptian code and curing method"
ABSTRACT : Cement is the most popular construction material due to several reasons. But it is not a sustainable material and energy intensive. Each ton of cement produces an equal amount carbon dioxide, during its production. This study has been carried out to find out the details of development of various physical and mechanical properties of geopolymer. The Initial And ... إقراء المزيد

| الكلمات المفتاحية KEYWORDS: Geopolymer concrete, ,
"Effect Of Curing Period On Geopolymer Concrete Incorporating GGBS ,Fly Ash And Silica Fume
ABSTRACT : Cement industry is one of the major contributors to the emission of greenhouse gasses. So, efforts are needed to make concrete more environmental friendly by using fly ash which helps in reduce global warming as well as fly ash disposal problem. This paper presents study of effect of curing period on mechanical properties of fly ash based geopolymer ... إقراء المزيد

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