Title

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

Document Type

Article

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.

Disciplines

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

Permissions

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