Influence of Combined Hauling Time and Temperature on Flow Properties of Self-Consolidating Concrete: Retempering Remediation

Document Type

Article

Publication Date

1-2012

Publication Title

Journal of Materials in Civil Engineering

Volume

24

Issue

1

First page number:

1

Last page number:

7

Abstract

This investigation studied the retempering technique of remediation to mitigate the influence of combined transportation time and extreme hot and cold temperatures on plastic self-consolidating concrete (SCC). This method of remediation consisted of adjusting admixture dosage at the end of hauling to produce a matrix with similar fresh properties as those of the control concrete prepared at the temperature of 21°C and transportation duration of 10 minutes. Seven different temperatures (43, 36, 28, 21, 14, 7, and −0.5°C ) and five different hauling times (10, 20, 40, 60, and 80 minutes) were adopted. Polycarboxylate-based high-range water-reducing admixture (HRWRA) and viscosity-modifying admixture (VMA) were used to produce the selected matrices with slump flow of 635±25  mm or 711±25  mm , visual stability index (VSI) of 0 (highly stable concrete) and T50 of 2 to 5 s. Laboratory test results revealed that the retempering method of remediation was successful in mitigating the adverse effect of combined hauling time and temperature on the flow characteristics of self-consolidating concrete.

Keywords

Concrete; Concrete—Additives; Extreme temperature; Fresh performance; Hauling time; Overdosing remediation; Retempering remediation; Self-consolidating concrete

Disciplines

Civil and Environmental Engineering | Construction Engineering and Management | Environmental Engineering | Environmental Monitoring | Environmental Sciences

Language

English

Permissions

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