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Experimental findings have shown that the deleterious expansion
of mortar bars in ASTM C 1260 test is related to the formation
of expansive alkali-silica gel reaction product. Previous
studies conducted under the SHRP program have shown that the
addition of certain lithium-based admixtures such as lithium
hydroxide or lithium nitrate, to fresh concrete will
significantly reduce the ASR gel expansion. Research has also
been conducted using lithium to treat hardened concrete with
favorable results. The objectives of this project are to
evaluate the ability of lithium compounds to arrest the ASR
attack in hardened concrete, and to develop specifications for
field implementation of the lithium-based technology.
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