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103824

Investigating the Possibility of Constructing Low Cost Roller Compacted Concrete Dam.

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Last updated: 04 Jan 2025

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Public Works Engineering

Abstract

The design, and sequences for construction with Roller Compacted Concrete Dams, “RCCD" are considerably different from conventional mass concrete construction. This paper describes design mixes, model construction, monitoring system and thermal measurements analysis for RCCD constructed using the available low cost local materials. Trial laboratory concrete mixtures were conducted to define the best different RCCD proportions in the first stage.  Twelve mixtures with fly ash of different cement replacement percentages (0%, 50%, and 60%) divided into two groups, each one includes six concrete mixtures that were designed with water/cementitious materials ratio, w/cm of 1.0 and 0.9 for the first and second group respectively, two contents of cement of 150 kg/m3 and 120 kg/m3 were also examined. Tests were performed for determining fresh and hardened concrete properties.  In the second stage, based on the laboratory results, RCCD model was then constructed.  Descriptions of all construction stages, different instrumentations installed for dam monitoring system and temperature measurements results are also conducted and presented in this research. Test results clarify how fly ash interacts with Portland cement; its effects on the fresh and hardened concrete properties; and how RCCD thermal analysis is affected and proportioned with fly ash.  Fly ash, due to its pozzolanic and cementitious properties, is a suitable replacement material for cement to reduce cement usage without invading concrete properties and can contribute to strength gain and may improve performance of fresh and hardened concrete.  By using natural pozzolans, fly ash, in the massive concrete dam construction, it is possible to achieve a reduction of the temperature rise without any undesirable effects such as  bleeding,  tendency  to segregate, and  tendency to increase permeability. It also reduces the thermal stresses by reducing the heat of hydration. The obtained results indicated that RCC could be effectively produced using the available local Egyptian materials.

DOI

10.21608/bfemu.2020.103824

Keywords

Roller Compacted Concrete Dams, “RCCD”, Design Mixes, Model Construction Stages, Monitoring System, Thermal measurements, Low Cost Local Materials, and Fly Ash

Authors

First Name

Mohamed

Last Name

Abu-Khashaba

MiddleName

I.

Affiliation

Associate professor, Construction Research Institute, National Water Research Center, Delta Barrages, 13621, Egypt

Email

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City

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Orcid

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First Name

I.

Last Name

Adam

MiddleName

-

Affiliation

Professor and Deputy-Director of Construction Research Institute, National Water Research Center, Delta Barrages, 13621, Egypt.

Email

-

City

-

Orcid

-

First Name

A.

Last Name

El-Ashaal

MiddleName

-

Affiliation

Professor and Director of Construction Research Institute, National Water Research Center, Delta Barrages, 13621, Egypt.

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City

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Orcid

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Volume

38

Article Issue

4

Related Issue

15577

Issue Date

2013-12-01

Receive Date

2013-10-02

Publish Date

2020-07-19

Page Start

15

Page End

32

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 38_Issue 4_Pages 15-32.pdf

PDF . 4.3MB

Link

https://bfemu.journals.ekb.eg/article_103824.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=103824

Order

9

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

Investigating the Possibility of Constructing Low Cost Roller Compacted Concrete Dam.

Details

Type

Article

Created At

22 Jan 2023