Characterizing and Quantifying the Shrinkage Resistance of Alkali-Activated (Cement-Free) Concrete and Evaluating Potential Methods for Reducing Early-Age Cracking in Pavements and Bridges

Peethamparan, Sulapha; Thomas, Robert J.; Clarkson University. Department of Civil and Environmental Engineering

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Characterizing and Quantifying the Shrinkage Resistance of Alkali-Activated (Cement-Free) Concrete and Evaluating Potential Methods for Reducing Early-Age Cracking in Pavements and Bridges

2015-12-01
By Peethamparan, Sulapha ; Thomas, Robert J.

[PDF-4.91 MB]

English

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Details:

Creators:

Peethamparan, Sulapha ; Thomas, Robert J.

Peethamparan, Sulapha ; Thomas, Robert J. Less -
Corporate Creators:

Clarkson University. Department of Civil and Environmental Engineering
Contributors:

Ngami, Margueritte ; Li, Zihui

Ngami, Margueritte ; Li, Zihui Less -
Corporate Contributors:

City University of New York. University Transportation Research Center
Subject/TRT Terms:

[+]

Alkali Aggregate Reactions Cement-free Concrete Climate Change Concrete Cracking Raw Materials Shrinkage Shrinkage Resistance
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

City College of New York. University Transportation Research Center
Abstract:

This report summarizes the findings of an experimental investigation into shrinkage, and the mitigation thereof, in alkali-activated fly ash and slag binders and concrete. The early-age (chemical and autogenous) and later-age (drying and carbonation) shrinkage of sodium silicate-activated fly ash and slag binders was evaluated in accordance with relevant specifications. The influence of activator concentration and water content on the resulting shrinkage was investigated. The shrinkage behavior of alkali-activated binders and concrete was compared to that of ordinary portland cement. Finally, the effectiveness of several common shrinkage-mitigation techniques on the early-age and later-age shrinkage of alkali-activated binders was evaluated. Overall, this study demonstrates that, while shrinkage and associated cracking are problematic in many alkali-activated concrete mixtures, there are several promising methods which can reduce the magnitude of autogenous and drying shrinkage.
Format:

PDF
Funding:

49997-24-25
Collection(s):

Transportation and Climate Change Collection University Transportation Centers
Main Document Checksum:

[+]

urn:sha256:71940ab6915acd1e44bdd3bf2ea1cd8c8c1d361239d1648349eb3a9ce9b693d4
Download URL:

https://rosap.ntl.bts.gov/view/dot/32346/dot_32346_DS1.pdf
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Characterizing and Quantifying the Shrinkage Resistance of Alkali-Activated (Cement-Free) Concrete and Evaluating Potential Methods for Reducing Early-Age Cracking in Pavements and Bridges

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