aggregates for concrete ahmed ahmed academia

(PDF) Aggregates for Concrete Ahmed Ahmed - Academia

Aggregates for Concrete The importance of using the right type and quality of aggregates cannot be overemphasized. The fine and coarse aggregates generally occupy 60% to 75% of the concrete volume (70% to 85% by mass) and strongly influence the concrete’s freshly mixed and hardened properties, mixture proportions, and economy.

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Quality improvement of oil palm shell (OPS ... - Academia

Quality improvement of oil palm shell (OPS) as coarse aggregate in lightweight concrete. Ahmed Ahmad. IntroductionOil palm shell (OPS), being an agricultural solid waste ,is biodegradable and therefore can decay over a period of time if the environment is congenial, i.e. if enough moisture and sufficient air are present. ... Academia ©2021 ...

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(PDF) Mix design for oil palm shell concrete Ahmed Ahmad ...

Cement and Concrete Research 31 (2001) 1323 – 1325 Mix design for oil palm shell concrete M.A. Mannan, C. Ganapathy* Civil Engineering Program, School of Engineering and Information Technology, Universiti Malaysia Sabah, 88999 Kota Kinabalu, Sabah, Malaysia Received 26 August 2000; accepted 18 June 2001 Abstract The mix design of lightweight concrete using oil palm shell (OPS) as aggregate ...

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Properties of Concrete Produced Using ... - academia

The majority of the volume of concrete is aggregates and it consists about 70% of total volume of concrete. Moreover, coarse aggregate is the source of concrete strength, controls its cost, resist weather conditions and has direct effect on concrete ... Ahmed Mohmed Blash. Download PDF. Download Full PDF Package. This paper. A short summary of ...

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(PDF) Introductory behavior of rubber concrete Ahmed ...

Also, the rubber concrete was lightweight concrete compared with the conventional cement concrete as its density ranged from 1.78 to 2.06 g/cm 3 depending on the amount of the aggregates.With a material such as concrete, which contains void spaces of various sizes and shapes in the matrix and microcracks at the transition zone between the ...

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Abdelbary Ahmed - Academia

The compressive strength and the aggregate type are two important factors that affect the abrasive behavior of concrete. In this study, the natural coarse aggregate was replaced by Electrical Arc Furnace Slag (EAFS) in order to improve mechanical properties of concrete pavement blocks.

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Ahmed Ahmad University of East London - Academia

The 28-day compressive strengths of OPS concrete designed according to the ACI method for conventional concrete and methods mentioned in references [A. Short, W. Kinniburgh, Lightweight Concrete, third ed., Applied Science Publishers, London, 1978; M.S. Shetty, Concrete Technology, S. Chand, India, 1993] for lightweight aggregate concrete have ...

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Ahmed Ahmad University of East London - Academia

The 28-day compressive strengths of OPS concrete designed according to the ACI method for conventional concrete and methods mentioned in references [A. Short, W. Kinniburgh, Lightweight Concrete, third ed., Applied Science Publishers, London, 1978; M.S. Shetty, Concrete Technology, S. Chand, India, 1993] for lightweight aggregate concrete have ...

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Ahmed Alaagib University of East London - Academia

Ahmed Alaagib, University of East London, Civil Engineering Department, Undergraduate. ... crumb rubber, and a combination of tire chips and crumb rubber, were used to replace mineral aggregates in concrete. These particles were used to replace 12.5%, 25%, 37.5%, and 50% of the total mineral aggregate’s volume in concrete. ... Academia ©2021 ...

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Ahmed Adnan - Academia

Ahmed Adnan, Missouri University of Science and Technology, CIVIL Department, Graduate Student. ... (SP) and silica fume (SF) admixtures to yield a lightweight aggregate concrete, the effects of using different ratios of these admixtures on unit weight, compressive strength and flexural strength are studied individually and accumulatively ...

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Lightweight Concrete Research Papers - Academia

The concrete mixtures contained lightweight aggregate with a replacement percentage of 12.5, 25, 37.5, and 50 percent by volume. Fresh properties as well as compressive strength, modulus of rupture, and drying shrinkage were measured. While was effective in reducing drying shrinkage, the use of lightweight aggregate resulted in slightly ...

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Ahmed, E. and El-Kourd, A. (1989) “Properties of Concrete ...

Ahmed, E. and El-Kourd, A. (1989) “Properties of Concrete Incorporating Natural and Crushed Stone Very Fine Sand,” Materials Journal, American Concrete Institute, Vol. 86, No. 4, pp. 417-424. has been cited by the following article:

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Farabi Bin Ahmed Ahsanullah University of ... - Academia

Farabi Bin Ahmed, Ahsanullah University of Science and Technology, B.Sc. in civil engg Department, Undergraduate. Studies Sustainable Materials in Construction, Concrete, and Reinforced Concrete Structures. I am graduated from Ahsanullah University

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Ahmed Blash - Academia

by Ahmed Blash and Dr. T.V. S. Vara Lakshmi The atmosphere has been heavily affected by the emission of greenhouse gases, the most important of which is carbon dioxide. It releases about 1 ton of carbon dioxide into the atmosphere when producing 1 ton of Portland cement.

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Mahboob Ahmed University of Sargodha - Academia

Petrographic analysis revealed that there is trivial possibility of Alkali Aggregate Reaction like ASR and ACR. The results of geological and engineering parameters recommend limestone of Samana Suk Formation as suitable aggregate for the base course, sub base coarse, asphalt and cement concrete.

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Ahmed Ebid Future University ,Egypt. - Academia

Academia is a place to share and follow research. Future University ,Egypt., Structural Engineering, Faculty Member

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Evaluation of Mechanical Properties of Lightweight ...

Evaluation of Mechanical Properties of Lightweight Concrete with Pumice Aggregate Malik Salman Shafiq, Fasih Ahmed Khan, Yasir Irfan Badrashi, Fayaz Ahmed Khan, Muhammad Fahim, Asim Abbas, Waqas Adil; Affiliations Malik Salman Shafiq CECOS University of I.T. and Emerging Sciences, Peshawar, Pakistan ...

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Shamseldin abdo - rudn.academia

Influence of silica fume on the pervious concrete with different levels of recycled aggregates more by Shamseldin abdo and Ahmed Fawzy The world nowadays is trying to find alternative approaches to be used in manufacturing instead of consuming raw materials.

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Dr. Ahmed Ajel Ali Al Majtomi University ... - Academia

Design requirement of concrete (I.S.I) In water retaining structures a dense impermeable concrete is required therefore, proportion of fine and course aggregates to cement should be such as to give high quality concrete. Concrete mix weaker than M200 is not used. The minimum quantity of cement in the concrete

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Effect of recycled coarse aggregate on physical and ...

Oct 16, 2020  Butler, L, West, JS, Tighe, S (2013) Effect of recycled concrete coarse aggregate from multiple sources on the hardened properties of concrete with equivalent compressive strength. Construction and Building Materials 47: 1292 – 1301 .

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Ahmed Hamdy Housing Building ... - hbrc.academia

Academia is a place to share and follow research. Housing Building National Research Center, Sanitary and Environmental Engineering Research Institute, Chemist

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Je M'Appele Ahmed - Academia

Je M'Appele Ahmed studies Civil Engineering, German, and High Strength and High Performance Concrete. ... Civil Engineering, German, High Strength and High Performance Concrete, Recycled aggregate concrete for structural use, and Self Compacting Concrete. edit. About: edit. Advisors: edit. Papers- ... Academia ©2021 ...

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[PDF] COMPARISON OF STRENGTH PERFORMANCE OF CONCRETE

This study focuses on the relative performance of uncrushed aggregates and crushed aggregates for concrete in strength gaining. The study was conducted for medium grade concrete (concrete having cube compressive strength at 28 days between 6 Mpa to 50 Mpa). There is a general belief that crushed aggregates contribute higher strength in concreting compared to uncrushed aggregates.

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Ahmed Maher The German University in Cairo - Academia

Ahmed Maher, The German University in Cairo, Civil Engineering Department, Faculty Member. Studies Civil Engineering, Concrete Technology, and Mix Design.

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Dr. Tarig Ahmed - Academia

Dr. Tarig Ahmed studies Computer Sciences, Datawarehouse, and Software Product Management. ... The effects of highly reactive aggregate, fused silica, and slowly reactive aggregate, Thames Valley sand, on the mechanical properties of concrete were investigated in this paper. ... Academia ©2021 ...

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Shamsad Ahmad King Fahd University of ... - Academia

The measurement of tortuosity requires determination of porosity and pore size of concrete. Eighteen different concrete mixes were prepared by varying the levels of the key mix parameters, namely water/cement ratio, cement content and coarse/fine aggregate ratio, and then tested to determine porosity, pore size, tortuosity, and permeability.

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Ahmed Ebid Future University ,Egypt. - Academia

Academia is a place to share and follow research. Future University ,Egypt., Structural Engineering, Faculty Member

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Ahmed Omran - usherbrooke.academia

The pressure device enables the simulation of such concrete head using an overhead pressure exerted onto the fresh concrete. A number of parameters are used to validate the pressure device, including placement rate as well as mix designs of various paste volume, slump flow, w/cm, maximum size of aggregate, and dosages of chemical admixtures.

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Ehsan Ahmed - Academia

Ehsan Ahmed, Université de Sherbrooke (University of Sherbrooke), Département de Génie civil Department, Adjunct. Studies Structural Dynamics, Structural Engineering, and Earthquake Engineering.

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Experimental study on strength behaviour of recycled ...

Mar 10, 2013  The concrete specimen with. 100% recycled coarse aggregate at 28 days of curing has the lowest tensile strength, which was only 1.952 N/mm2. It is around 38.81% drop when compared to control. concrete specimen. There is a drop in tensile strength of 10.66%, 18.18%, 24.76% and 34.79% for the concrete.

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Ahmed ATTA Director of research and consultations centre ...

ABSTRACT Nine full scale R.C. thin-walled beams were tested to achieve small thickness, self-compacting concrete with maximum aggregate size of 10mm was used.

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Bahir Dar University School of ... - bahirdar.academia

Academia is a place to share and follow research. ... (CC) with recycled aggregate concrete (RAC). The output of this study will highly impact the growing construction industry and communities in Ethiopia thereby reducing waste, saving cost, conserving natural aggregates, building capacity, and setting quality standards. ... by Ahmed Endris ...

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Abdelhamid Charif King Saud University - Academia

This paper investigates the structural behavior of reinforced concrete beams made with locally available natural lightweight scoria aggregates. A series of 4 full scale structural lightweight reinforced concrete beams 2.9 m long, with a rectangular cross-section of 250×300 mm were designed, cast and tested under 4 points bending test.

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Time-Dependent Deflection of Palm Shell Aggregate Rc Beams ...

May 12, 2011  The use of Oil Palm Shell (OPS) as coarse aggregate is a cost-effective approach in the production of structural lightweight concrete. The aim of this book is to investigate the time-dependent deflection performance of palm shell aggregate concrete beams for the period of four months sustained loading condition.

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Taha Ahmed The University of Iowa - Academia

The average void of 1.5-inch WMA overlay (9.0%) was higher than that of hot mix asphalt (HMA) overlay (7.0%) placed on an urban street in Iowa City. It was partly due to the asphalt temperature that was lowered to match the lower aggregate temperature. As a result, the aggregate temperature for WMA was also significantly lower than HMA.

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