Abstract: A form for creating cavities within large concrete structures, wherein the formed is created by interconnecting a plurality of section members, the section members having flexible mold skeleton members retaining polymer-aggregate panel members, and wherein the form may be internally pressurized to increase its rigidity and weight-bearing capability. The mold skeleton members have annular and longitudinal flanges that are used as planing guides to form the external surface of the polymer-aggregate panel members. Preferably, spacer members are inserted between the annular and longitudinal flanges and the spacer members are used as planing guides. The adjacent section members are mechanically joined to each other, such that the form may be disassembled and re-used.

Abstract: A form for creating cavities within large concrete structures, wherein the formed is created by interconnecting a plurality of section members, the section members having flexible mold skeleton members retaining polymer-aggregate panel members, and wherein the form may be internally pressurized to increase its rigidity and weight-bearing capability. The mold skeleton members have annular and longitudinal flanges that are used as planning guides to form the external surface of the polymer-aggregate panel members. Preferably, spacer members are inserted between the annular and longitudinal flanges and the spacer members are used as planning guides. The adjacent section members are mechanically joined to each other, such that the form may be disassembled and re-used.

Abstract: A form for creating cavities within large concrete structures, wherein the formed is created by interconnecting a plurality of section members, the section members having flexible mold skeleton members retaining polymer-aggregate panel members, and wherein the form may be internally pressurized to increase its rigidity and weight-bearing capability. The mold skeleton members have annular and longitudinal flanges that are used as planning guides to form the external surface of the polymer-aggregate panel members. Preferably, spacer members are inserted between the annular and longitudinal flanges and the spacer members are used as planning guides. The adjacent section members are mechanically joined to each other, such that the form may be disassembled and re-used.

Abstract: A dynamic floating breakwater or dock device is disclosed which is generally T-shaped in cross-section, having a platform beam, a vertical beam and a keel member. The density of the device varies from top to bottom, such that the platform beam is the least dense and the keel member is the most dense, with the overall density of the device remaining less than that of water. The center of gravity of the device is located in or near the keel member, such that the device will pivot when encountering oncoming waves, the pivoting motion in conjunction with the vertical motion acting to create anti-waves which cancel or lessen the oncoming wave. The device is preferably constructed of a concrete having lightweight material such as polystyrene beads used for the aggregate.