Scope
This document describes a method for determining the volumetric shrinkage of products formulated with
thermosetting polymer binders, mainly epoxy and polyester binders, that cure at ambient temperature or below.
This method is adapted for crack injection products formulated with polymer thermosetting binder.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
EN ISO 2811-2, Paints and vamishes - Determination of density-Part 2: Immersed body (plummet) method (ISO
2811-2：1997）.
3
Test principle
The total volumetric shrinkage is calculated as the percentage change in density when the polymer system at
(21±2) ℃ cures to the final product also at (21 ± 2)°C.
The density after polymerisation (curing) is measured at (21±0,5) °C by measuring the buoyancy of the specimen
immersed in silicone oil.
4
General requirements for testing - Apparatus
4.1
balance accurate to 0,001 g.a density measuring device,and suitable wire for suspending the specimen in
silicone oil;
4.2
thermometer accurate to 0,2 °C and graduated at intervals of 0.2 °C or finer;
4.3 silicone oil bath of density Qsi at +(21 ±0,5)℃;
4.4
test tube. diameter 20 mm, length 180 mm in polyethylene or glass treated with a silicone release agent;
4.5
stopwatch;
4.6 desiccator.
4.7 temperature - controlled room or enclosure,capable of maintaining the sample at the recommended
constant temperature.

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