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Alkali Aggregate Reaction Bath


The Alkali Aggregate Reaction Bath is used to keep 25 x 25 x 285 mm samples in NaOH (Sodium Hydroxide) or in any other solution at a specified temperature. The temperature can be adjusted between ambient to 100°C by using the digital controller with 1°C accuracy.
Temperature can also be monitored by an external 1°C accuracy PT 100 sensor placed in the water. The bath is made completely of stainless steel and has glass cover and a chamber with a 36 sample capacity. The chamber has a cover made of stainless steel. Samples are placed on a special rack made of poly-amide where each sample stays independent from each other in a vertical position. The bath is also equipped with an electronic water level indicator which gives an alarm when the water level is lower than required. TCM-0033 is used to determine the potential alkali reactivity of cement-aggregate combinations (mortar-bar method). This mould is also used for determining the length change of hardened cement paste, mortar and concrete.
The test also requires TCM-0037 or TCM-0038 Length Comparators. By removing the special rack, TA-0880 Aggregate Reaction Bath can also be used as a general purpose water bath.


  • CANADA CSA-A23.2-25A
  • ASTM C227
  • ASTM C490
  • ASTM C1260
  • ASTM C227
  • ASTM C1567


Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.

TCM-0033 Two Gang Prism Shrinkage Mould, 25 x 25 x 285 mm
TCM-0034 Steel Insert for TCM-0033, 12 pcs.
TCM-0035 Reference Rod 305 mm Long with Convex Hemispherical End


Technical specifications are subject to change without notice.

Alkali Aggregate Reaction Bath
Alkali Aggregate Reaction Bath
with dipping container
Dimensions mm 550 x 1000 x 800 550 x 1000 x 800
Weight (approx.) Kg 70 65
Power W 2000 2000