A report from the scene of the disaster

The Architect arrived on site as the builders were clearing up. Large quantities of unused and still liquid concrete were being scraped of the ground floor slab and into the garden.
Apparently the pressure from the concrete pump combined with a neglected corner of the timber formwork had proved disastrous for the middle wall. The form had ruptured at the base spilling its contents into the gulley between the site hut and the façade. Hasty repairs had followed and a second attempt to pour the concrete had been successful.

Such an event will obviously have repercussions on the quality of the concrete. The ground floor walls are all to be left with the concrete exposed, so the quality of the surface is paramount. With all the efforts to mitigate the disaster it is certain that some of the essential tasks like vibrating the concrete to ensure there are no air pockets, will have been neglected. The formwork will be taken down to expose the finished walls in one or two days. The true extent of the disaster will only then be visible. The Architect is holding his breath.