Specification - Concrete Mix Design, Quality Control and Specification - page 117

ASTM C 1260
(AASHTO T303),
Potential alkali
reactivity of
aggregates (mortar-
bar method)

To test the potential for
deleterious alkali-silica
reaction of aggregate in
mortar bars

Immersion of mortar
bars in alkaline
solution at 80°C
(176°F)

16 days Very fast alternative to C 227. Useful for

slowly reacting aggregates or those
that produce expansion late in the
reaction.

ASTM C 1293,
Determination of
length change of
concrete due to
alkali-silica reaction
(concrete prism test)

To determine the
potential ASR
expansion of cement-
aggregate combinations

Concrete prisms
stored over water
at 38°C (100.4°F)

Varies: irst
measurement at 7
days, then 28 and
56 days, then 3, 6,
9, and 12 months;
every 6 months as
after that as
necessary

Preferred method of assessment. Best
represents the ield. Requires long test
duration for meaningful results. Use as
a supplement to C 227, C 295, C 289,
and C 1260. Similar to CSA A23.2-14A.

ASTM C 1567,
Potential alkali-silica
reactivity of
combinations of
cementitious
materials and
aggregate
(accelerated
mortar-bar method)

To test the potential for
deleterious alkali-silica
reaction of
cementitious materials
and aggregate
combinations in mortar
bars

Immersion of mortar
bars in alkaline
solution at 80°C
(176°F)

16 days Very fast alternative to C 1293. Allows

for evaluation of effectiveness of
supplementary cementitious materials.

Source : Farny, J. A., and Kerkhoff, B., Diagnosis and Control of Alkali-Aggregate Reactions in Concrete , 15413, Portland Cement Association, Skokie, IL, 2007.