01025618

Component

The increasing identification of alkali-silica reaction (ASR) in concrete structures in combination with the depletion of non-reactive aggregate sources, particularly in urban areas, have renewed interest in lithium-containing chemical admixtures to mitigate damage by ASR. Although the beneficial effects of lithium for prevention or reduction of ASR damage have been shown, the secondary effects of lithium compounds on early age properties remain largely uncharacterized. The purpose of this literature review is to begin to address the effects of lithium admixtures on early age properties of concrete. The effects of lithium admixture addition on the chemistry of the pore solution and hydration products and the effects, if any, on concrete setting time, air entrainment, unit weight, workability, strength, and shrinkage are addressed. In many cases, current literature describes inconclusive, and sometimes contradictory, results. The uncertainty on these effects of lithium compounds warrants further investigation with emphasis on the effects of varying lithium dosages, the influence of cement composition (i.e., admixture-cement compatibility), and the binding of lithium in fly ash concrete.

01020180

06-1080

English

15p

2006

Transportation Research Board 85th Annual Meeting

CD-ROM

Figures (3) ; References (41)

Admixtures; Alkali silica reactions; Concrete; Fly ash; Literature reviews; Lithium; Pavement performance

Highways; Materials; I32: Concrete

Transportation Research Board Annual Meeting 2006 Paper #06-1080

BTRIS, TRIS, TRB

Mar 3 2006 10:34AM