23 January 2017
The link to this article is below.
This article is interesting for the study of FC properties. The oil industry has used FC for decades to place around the well bore to stabilize the ground and keep the pipe in place. The oil industry has spent a lot of money researching this and there are numerous patients on the mixes. Although the objective of these studies is very different than for creating a construction FC, I believe we could learn something from them. I have not seen an article dealing with FC for construction mentioning the oil industry knowledge (please help me find one).
This article deals with the influence of CO2 on FC, but there are a number of interesting points for us, one of them is, and I quote ”Low-density foamed cement is more ductile than conventional cement and can tolerate expansion, shrinking, and displacement without losing its sealing capabilities (Spielman et al., 2006). In addition to its light-weight property, foamed cement has excellent resistance to temperature and fluid-induced stresses.
Another big difference is that they produced the FC in a high speed mixer. Thus not using a pre-formed foam and then mix this in. This is an interesting method to follow and could be useful for the precast industry, some do already I believe.
There is also mention of the importance of the bubble size and uniformity.
No effort was spared in examining the test samples with all sorts of modern equipment, that is generally not available to the average lab.
An interesting read that may help you form some ideas on studying FC.