The soundness of cement and hydrated lime is of particular importance. It is essential that once hardened the paste does not undergo a large change in volume.

The soundness of cements and limes can be determined by an expansion test using Le Chatelier Moulds. The method of curing lime differs from that of cements, lime being cured in a steam tank and cements in a water bath. The ASTM method uses a high-pressure steam vessel (Autoclave) to cure the specimens.

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• Forms 10” (254 mm) gauge length specimens.
• Plated for rust resistance and long life.

Test Bar Molds are designed to form specimens in accordance with ASTM and AASHTO specifications, for use in the Cement Autoclave.

Model No. Desc
34-8548 Contact Points
34-8544 Two Gang Prism Mould 1" x 11 1/4"
34-8545 Single mould

• Forms 10” (254 mm) gauge length specimens.
• Plated for rust resistance and long life.

Test Bar Molds are designed to form specimens in accordance with ASTM and AASHTO specifications, for use in the Cement Autoclave.

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• Double-post frame construction for stability.
• Sturdy metal base platform.
• Precision machined Invar steel reference bar.
• Available in 3 models: with dial indicator in English units, with dial indicator in Metric units or with digital indicator with English or Metric units selectable.

The Length Comparator is a device used for measuring the length changes of cement paste, mortar and concrete specimens, in accordance with ASTM and AASHTO specifications.

The precision unit consists of a sensitive indicator mounted on a sturdy, dual post construction frame. The movable and stationary anvils are shaped to receive the reference pins which are cast into the ends of the test specimen bars.

The Length Comparator is supplied complete with an Invar steel reference bar.

Model No. Desc
34-8504 English Length Comparator
34-8505 Metric Length Comparator
34-8507 Digital Length Comparator