| CPC E01C 11/225 (2013.01) [E01C 5/065 (2013.01); E01C 2201/20 (2013.01)] | 19 Claims |
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1. A method of forming a cement-based material pad comprising a plurality of drainage holes, the method comprising:
providing a form comprising a sheet and a plurality of straight conduits, each conduit 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;
placing said form; and
pouring a cement-based material into said form until the cement-based material surrounds the conduits, leaving the upper ends of the conduits exposed;
wherein the plurality of conduits are arranged such that a cement-based material pad having porosity of 1 to 50% is formed; 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;
wherein the method further comprises the step of trimming a portion of each of the plurality of conduits exposed from the cement-based material; and
wherein the method further comprises removing the connecting means once the cement-based material has set.
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