Report: Asphalt structures in the seawater: Effects of animal and plant colonisation (1961-1964)»
Description
The Norderney Research Centre carried out investigations on castable asphalt between 1961 and 1964. This was about the extent to which biological influencing factors Aphalt in seawater construction can damage.
The importance of the altitude in the waterwetting zone known from biology has also been confirmed for the influence of the asphalt by marine organisms.
In Appendix 4, the average colonisation and the influence of samples during the trial period were presented schematically. Individual boxes may, of course, have been populated by other species at certain times.
Seapox causes the greatest damage because, in addition to the surface, they adversely affect the strength of the asphalt at a depth of about 2-3 cm due to invading casing fragments. Mussels lead to shape changes, which, however, can be compensated under certain circumstances. Green algae influence the upper layer of large-area asphalt casting ceilings by contracting their threads.
Of the asphalt mixtures studied, those with B200 were severely affected by mussels and seapox. In B65 there were minor effects; here, the algae flow is bigger. The asphalt casting compound with B 25 resulted in almost no surface changes. It should be concluded that asphalts with harder bitumen varieties than B 65 should be used in the upper part of the water change zone.
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Tags
- makrozoobenthos-makrofauna-artenzusammensetzung-asphalt-versuch-pflanzen-pflanzenbesiedlung-tierbesiedlung
- norderney