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Title:

Effect of Latex-Cement Ratio on the Early-Age Shrinkage of Very-Early-Strength Latex-Modified Concrete

Accession Number:

01336728

Record Type:

Component

Abstract:

Very-early strength latex-modified concrete (VES-LMC) was developed to create a fast-track overlay of concrete bridge decks under heavy traffic. The development of VES-LMC concentrated on workability and strength gain so that the deck can be opened to traffic only three hours after the concrete's placement. The mixture of VES-LMC might induce very high heat of hydration at early-age because of its inherent rapid hardening property and could be susceptible to autogenous shrinkage because of its relatively low water-cement ratio. This study evaluated the effect of the latex-cement ratio (L/C), with both constant and variable slumps, on the temperature rise with heat of hydration and early-age shrinkage of VES-LMC by carrying out a simple temperature rise test and an early-age shrinkage experiment. The results are as follow: The overall trends of temperature rise with heat of hydration were similar regardless of latex-cement ratios within this study, although the initial setting varied a little by the latex-cement ratio. This result affirms that latex contributes to the enhancement of the concrete durability but has little effect on its hydration and the accompanying heat of hydration in very-early strength latex-modified concrete. Autogenous shrinkage increased with the increase in latex-cement ratio and its pattern followed regularly a logarithmic increase. However, the influence of the water-cement ratio and latex-cement ratios on early-age autogenous shrinkage for the test specimens at constant slump was found to be minor due to the simultaneous effect of the two experimental variables.

Supplemental Notes:

The DVD lists the title of this paper as: Effect of Latex-Cement Ratio on Early-Age Shrinkage of Very-Early-Strength Latex-Modified Concrete.

Monograph Accession #:

01329018

Report/Paper Numbers:

11-2404

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Yun, Kyong-Ku
Choi, Pan-Gil
Kim, Ki-Heun
Kim, Hyun-Suk
Ahn, Sang-Hyeok

Pagination:

23p

Publication Date:

2011

Conference:

Transportation Research Board 90th Annual Meeting

Location: Washington DC, United States
Date: 2011-1-23 to 2011-1-27
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures; Photos; References (15) ; Tables (2)

Subject Areas:

Bridges and other structures; Highways; Materials; I32: Concrete

Source Data:

Transportation Research Board Annual Meeting 2011 Paper #11-2404

Files:

TRIS, TRB

Created Date:

Feb 17 2011 6:09PM