Exact(20)
In this test, the specimens were removed from the molds at the age of 24 h.
For the NSSM test, the specimens were preconditioned by vacuum saturation with calcium hydroxide solution.
During scratch test, the specimens showed formation of cohesive cracks at a load of 1 N.
During the test, the specimens were clamped by two rings attached to the test machine of outer diameter of 100-mm.
After the test the specimens were split exactly into two halves and the water penetration front was marked on the specimen as shown in Fig. 4.
For TBS test, the specimens were attached to the universal testing machine (Model TT-B, Instron Corp., Canton, MA, USA) using a 0.020-in 0.020-in
Similar(40)
Flexural testing machine was used to test the specimen.
Before testing, the specimens were thawed for 48 hours.
After the tests, the specimens with films were dried and weighed again.
Special fixtures were designed both for gluing and testing the specimens.
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