The Auto-Shrink system measures the unrestrained autogenous shrinkage of a specimen of cement paste or mortar cured under sealed conditions (ASTM C1698, Test Method for Autogenous Strain of Cement Paste and Mortar).
Auto-Shrink permits evaluation of the relative autogenous shrinkage potential of different cementitious systems. Excessive autogenous shrinkage may lead to microcracking that increases the permeability of concrete.
The Auto-Shrink digital dilatometer is composed of the following basic elements:
A corrugated plastic mold with tight-fitting plugs to prepare a slender test specimen
A rigid frame to support the specimen
A digital dial gauge with remote control to measure change in specimen length
A reference bar
Hylec Controls | Test Equipment Suppliers and Integrators
Hylec Control was first established in 1979 and initially started operation as a developer and manufacturer of analogue control systems. These were specially customised hydraulic applications, using ...