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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0530770 (2003-10-07) |
등록번호 | US7993570 (2011-07-27) |
우선권정보 | AU-2003-003901529(2003-03-31) |
국제출원번호 | PCT/AU03/01315 (2003-10-07) |
§371/§102 date | 20051006 (20051006) |
국제공개번호 | WO04/031093 (2004-04-15) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 1 인용 특허 : 792 |
A cementitious product and method of modifying the properties of a low or medium density FRC product by providing a predetermined pore size distribution. The pore size distribution is obtained such that in critical zones of the distribution, the pore volume is substantially equivalent to or less tha
A cementitious product and method of modifying the properties of a low or medium density FRC product by providing a predetermined pore size distribution. The pore size distribution is obtained such that in critical zones of the distribution, the pore volume is substantially equivalent to or less than the pore volume in a respective critical zone of a conventional high density FRC product. The resultant material provides improved properties over conventional medium density FRC products, in particular improved freeze/thaw durability and/or improved workability.
The invention claimed is: 1. A method of providing a low or medium density FRC product having a density of less than about 1.55 g/cm3, comprising the steps of: i) providing a formulation for a low or medium density product; ii) forming a green article from said formulation; iii) curing said green ar
The invention claimed is: 1. A method of providing a low or medium density FRC product having a density of less than about 1.55 g/cm3, comprising the steps of: i) providing a formulation for a low or medium density product; ii) forming a green article from said formulation; iii) curing said green article to form said product; wherein prior to step iii) one or more pore size modifying agents are added to the formulation such that the pore volume of the product is reduced as compared with a conventional product emanating from steps i) to iii), while maintaining a density of no greater than about 1.6 g/cm3 wherein the reduced pore volume of the product comprises a predetermined pore size distribution, which is obtained by chemical modification by including a predetermined quantity of pore modifying components into the formulation, wherein the pore modifying components include lignocellulosic fibers treated with a water repellant agent and microfine siliceous material, wherein the water repellant agent comprises a hydrophilic group and a hydrophobic group, wherein the lignocellulosic fibers treated with a water repellent agent are incorporated into the formulation at a concentration of about 2 to 4% of total weight of dry solids, wherein the microfine siliceous material is incorporated into the formulation at a concentration of about 2 to 4% of total weight of dry solids, wherein said formulation further comprises reinforcing fibers and the total amount of reinforcing fibers and lignocellulosic fibers treated with a water repellent agent is less than about 7% of total weight of dry solids.
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