HEAT INSULATING CONCRETE PLATE AND MANUFACTURE THEREOF

• Main Authors: SOENO KENICHI, KATSURAGI MASAO, ODA SHOZO, NAKAGAWA MASAKATSU, IZUMI ITOSHI, KOJIMA MASAAKI
• Format: Patent
• Language: English
• Published: 01.02.1989
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; TRANSPORTING; WORKING CEMENT, CLAY, OR STONE

PURPOSE:To obtain a heat insulating concrete plate which is excellent from view point of strength inspite of possession of necessary heat insulating capacity and possesses low water permeability, by a method wherein the opposite side of a heat insulating concrete layer wherein lightweight aggregate or bubbles are mixed in one face side thereof is formed into a densified concrete layer. CONSTITUTION:Concrete with which lightweight aggregate or a foaming agent is mixed is deposited within a concrete shuttering and the concrete shuttering is driven and turned so that centrifugal force is acted upon the same in the direction of its thickness. A densified concrete layer Cd is formed on an outer circumferential side of a diametral direction of a turning locus of the concrete shuttering, a heat insulating concrete lay Ci is formed on an inner circumferential side of the diametral direction of the turning locus and demolded after cure. The opposite side concrete layer to be integrated with a heat insulating concrete layer Ci with which the lightweight aggregate or bubbles are mixed is constituted into a densified one while giving desired heat insulating properties to the heat insulating concrete layer Ci, in a concrete plate obtained in this manner. With this constitution, along with an improvement of the whole strength of the concrete plate, infiltration of water or salt into the surface of the concrete layer Cd can be reduced.