Patent ID: 11939729
Assignee: IMPERIAL COLLEGE INNOVATIONS LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 17:
18. A form for use in producing a cement-based material pad comprising
a plurality of drainage holes, the form
comprising:
a sheet; and
a plurality of straight conduits, each having an upper end and a lower end;
wherein each conduit has a constant cross-section and forms a channel from the upper end to the lower end that passes through the sheet; and the form being an open-top form whereby a cement-based material can be poured onto the sheet to surround the conduits, leaving the upper ends of the conduits exposed;
wherein the plurality of conduits are arranged such that the form is for use in producing cement-based material pad having porosity of 1 to 50%; and
wherein the form further comprises a connecting means holding each of the plurality of conduits parallel to one another and wherein when the cement-based material is poured onto the sheet to surround the conduits, the upper ends of the conduits and the connecting means are left exposed; and the connecting means is configured to be removable once the cement-based material has set.