Claims
- 1. A method of producing concrete bodies in a mould, between a ram and a mould base, comprising the steps of: transferring a coat of discrete particles of adhesive from a substrate on which said discrete particles of adhesive are formed in a preselected density to one face of a layer of filter material over a sufficient area of said filter material to ensure adhesion of said filter material to said at least one of said ram and said mould base under normal working conditions, while leaving a substantial area of said one face of said layer of filter material uncovered between said discrete particles of adhesive to ensure substantially unimpeded flow of water through said substantial area; placing said layer of filter material in said mould; securing said layer of filter material to at least one of said ram and said mould base by said coat of discrete particles of adhesive; pressing wet concrete between said ram and said mould base to compact said concrete and express water from said concrete at a preselected flow rate, said preselected rate of flow of water from said concrete during said pressing being regulated by said preselected density of said discrete particles of adhesive transferred to said one face of said layer of filter material, to thus produce said concrete body in said mould.
- 2. A method of producing concrete bodies as claimed in claim 1, wherein said coat of discrete particles of adhesive extends over substantially an entire area of said one face of said layer of filter material.
- 3. A method of producing concrete bodies as claimed in claim 1 or claim 2, wherein said discrete particles of adhesive cover between 2% and 15% of a total surface area of said one face of said layer of filter material.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8730127 |
Dec 1987 |
GBX |
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Parent Case Info
This application is a continuation of application Ser. No. 287,126, filed Dec. 20, 1988, now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (2)
Number |
Date |
Country |
7310578 |
Feb 1975 |
NLX |
1522280 |
May 1977 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
287126 |
Dec 1988 |
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