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Title: Length change and strength development of candidate cement-based sealing mixtures for the WIPP
Authors: United States. Department of Energy.
Sandia National Laboratories
Poole, Toy S.
Wakeley, Lillian D.
Keywords: Expansive cement
Length change
Relative humidity
Expansive concrete
Concrete expansion
Concrete contraction
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; SL-93-4.
Description: Technical Report
Abstract: As part of materials development studies for the Waste Isolation Pilot Plant (WIPP) Plugging and Sealing Program, we studied two freshwater sanded grouts proportioned with materials having potential for expansion. Length change (expansion or shrinkage) and strength development were measured following curing and storage at temperatures from 23 to 50 °C and relative humidities from 50 to 100 percent. Length change was negative at all temperatures at RH values of 75 percent and less. Decidedly positive length change (expansion) occurred only when samples were stored at 100 percent RH, and even this reversed with time at the higher temperatures. Low relative humidity also inhibited strength gain, as did storage at 50 °C, but temperatures up to 38 °C favored higher strength. This work demonstrates the control on both early-age and long-term properties of cement-based materials that can be exerted by variables of the service environment.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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