*2.2. The Test*

The samples of max. grain 4mm concrete were 14 days old when tested, but the max. grain 19 mm concrete was 28 days old when the test took place. Even though compression strength tests indicated a full strength of the 14-day samples, the difference in age of the samples should be taken into account in direct comparison. The numbers of the samples are shown in Table 2.

**Table 2.** Samples.

