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Title:

Optimization of Water and Metakaolin Content to Achieve High Performance in Concrete

Accession Number:

01155675

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The two most common methods of achieving high-performance in concrete are: reduced water, and matrix modification through pozzolans. In this investigation, the effects of water content and cement replacement with metakaolin, at various levels, were studied experimentally in two phases. First, the upper limit for cement replacement with metakaolin to achieve reduced permeability was established for mixtures with a relatively high water-to-binder ratio of 0.45. A two-factor factorial design was used to implement analysis of variance (ANOVA) table and obtain empirical model based on multiple regression analysis. The model is expressed as a function of two independent variables: percent replacement of cement with metakaolin, and age of concrete. The mixtures were then refined to include the effect of water content. The water-to-binder ratios selected were 0.35, 0.30, and 0.25. For each series of water-to-binder ratios, four levels of cement replacement with metakaolin were selected: 0, 5, 10, and 15%. Two critical aspects of concrete performance were investigated, namely: compressive strength, and permeability. Using statistical analysis, empirical models were developed to quantify the effects of water and metakaolin content on concrete compressive strength and permeability. Each of these empirical models is expressed as a function of two independent variables: percent replacement of cement with metakaolin, and water-to-binder ratio. The experimental results and statistical analysis performed indicated that contribution of metakaolin to achieve high-performance is more significant than reduced water content. This paper presents the outcome of this comprehensive experimental investigation and statistical analysis.

Monograph Accession #:

01147878

Report/Paper Numbers:

10-3126

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Marikunte, Shashi S
Phelps, Ryan J
Moutairou, Iliyassou O

Pagination:

16p

Publication Date:

2010

Conference:

Transportation Research Board 89th Annual Meeting

Location: Washington DC, United States
Date: 2010-1-10 to 2010-1-14
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (7) ; References (14) ; Tables (6)

Uncontrolled Terms:

Metakaolin

Subject Areas:

Highways; Materials; Pavements; I32: Concrete; I52: Construction of Pavements and Surfacings

Source Data:

Transportation Research Board Annual Meeting 2010 Paper #10-3126

Files:

TRIS, TRB

Created Date:

Jan 25 2010 11:32AM