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Title:

Evaluation of the Compressive Strength and Rapid Chloride Permeability of High Replacement Ternary Mixtures
Cover of Evaluation of the Compressive Strength and Rapid Chloride Permeability of High Replacement Ternary Mixtures

Accession Number:

01366033

Record Type:

Component

Abstract:

Portland cement concrete (PCC) is the world’s most versatile and most used construction material. To meet the global demand for sustainability, engineers have looked to alternative supplementary cementitious materials (SCMs) such as fly ash, silica fume, ground granulated blast furnace slag, to increase pavement durability while lowering the initial and life-cycle cost. Twenty-seven ternary mixtures with portland cement replacement rates ranging from 50 to 90 percent were produced and the fresh and hardened characteristics were determined. Fresh concrete properties of air content, slump, unit weight, and set time were measured. Hardened concrete properties measured included: compressive strength at 7, 14, 28, 56, and 90 days of age and rapid chloride permeability at 56 days of age. Other properties were measured, but are beyond the scope of this paper. Compressive strength results showed equal to or greater compressive strengths especially at later ages of 56 and 90 days. The compressive strengths of all mixtures with SCM replacements up to 80 percent meet LADOTD specifications of 4000 psi at 28-days. The ratios of the seven to 28 day compressive strengths showed that they are more resistant to early age cracking due to the lower modulus at early ages allowing for more creep. The rapid chloride permeability results show that the ternary mixtures will easily meet the new permeability specifications for all structural class concrete requiring less than 1500 Coulombs at 56 days. The results point to a reasonable portland cement replacement level with SCMs of about 70 percent for LADOTD concrete projects.

Supplemental Notes:

This paper was sponsored by TRB committee AFN20 Properties of Concrete

Monograph Accession #:

01362476

Report/Paper Numbers:

12-1610

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Rupnow, T D

Pagination:

19p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC, United States
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Materials; Pavements; I32: Concrete

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-1610

Files:

PRP, TRIS, TRB

Created Date:

Feb 8 2012 5:03PM