The mix design team is finalizing their skin layer mix. This step is critical because if the specific weight of the skin layer is too high, then the two concrete layers together may have a greater specific gravity than water. In order to ensure construction begins on time, the mix design team has been in the lab during winter break preparing both concrete mixtures. Currently, the core and skin layer without the waterproofing admixture is curing for 1 week and will be tested for its specific weight and compressive strength on Thursday, January 18th. After these two quick tests, it will be determined if the core mix will need more Elemix in order to decrease the canoe specific weight so it is less than that of water, 62.4 pcf. On this date, the last concrete cubes will be made to ensure the final mixes that are chosen will be suitable for the canoe.