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Cement Autoclave

 

Standards: ASTM C151, AASHTO T107

 

Uses accelerated means of estimating delayed expansion of Portland cement caused by hydration of CaO and MgO. Test bars are exposed to controlled steam pressure and corresponding constant temperature. Unit produces 60-350 psi (0.4-2.4MPa) range of aspressures and consists of steam vessel, pressure regulator, pressure gauge (0-600 psi x 5 psi), air vent valve, power switches and safety pop valve set at 350psi. Includes thermometer, wrench and 5 gaskets. Additional gaskets, heating units and safety pop valves are available as replacement parts.

Expansion

Length Comparator

 

Standards: ASTM C151, ASTMC157, ASTM C227, ASTM C311, ASTM C341, ASTM C342, ASTM C452, ASTM C490, ASTM C596, AASHTO M210, AASHTO T107, AASHTO T160

 

Length comparators measure length changes of hardened cement paste, mortar and concrete prismatic specimens. Indicators are mounted on a sturdy upright support attached to a solid triangular base. All units Include stationary and movable anvils designed to fit gauge studs, which are cast into test specimens and an invar reference bar.

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