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GB1422788A - Forming voids in concrete - Google Patents

Forming voids in concrete

Info

Publication number
GB1422788A
GB1422788A GB2673772A GB2673772A GB1422788A GB 1422788 A GB1422788 A GB 1422788A GB 2673772 A GB2673772 A GB 2673772A GB 2673772 A GB2673772 A GB 2673772A GB 1422788 A GB1422788 A GB 1422788A
Authority
GB
United Kingdom
Prior art keywords
concrete
block
wax
composition
void
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2673772A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Ltd
Original Assignee
Monsanto Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Monsanto Ltd filed Critical Monsanto Ltd
Priority to GB2673772A priority Critical patent/GB1422788A/en
Priority to DE19732328273 priority patent/DE2328273B2/en
Priority to FR7320961A priority patent/FR2187847B1/fr
Priority to US05/520,068 priority patent/US4136140A/en
Publication of GB1422788A publication Critical patent/GB1422788A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • B22C7/023—Patterns made from expanded plastic materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/228—Forming foamed products
    • C08J9/236—Forming foamed products using binding agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

1422788 Destructible core MONSANTO Ltd 11 May 1973 [8 June 1972] 26737/72 Heading B5A [Also in Divisions C3 and C4-C5] A void is formed in concrete by forming a member in the shape of the desired void by (a) moulding a composition comprising a wax and particles of a foamed polymer (b) cutting a mass consisting of the said composition or (c) coating a pre-formed void forming member with the composition, placing concrete around the member, allowing the concrete to set. The composition is subsequently removed. Examples are given in which (1) a hot mixture of expanded polystyrene granules and paraffin wax was allowed to cool in a wooden block mould, liquid concrete was poured over and around the resulting polymer/wax block and allowed to cure and hot water was used to remove the block from the concrete by melting the wax and allowing it and the granules to float out; (2) the process of (1) repeated, except that the mould in which the polymer/wax block is formed was lined with hardboard, yielding a composite block and hence a concrete block with a hardboard layer; (3) a block of foamed polystyrene was coated with the said polymer/ wax composition, and used to form a void in a concrete member as in (1), by melting the wax of the coating layer after the concrete had set, thus removing the coating layer and allowing removal of the polystyrene block. Other foamed polymers are described, e.g. polyethylene.
GB2673772A 1972-06-08 1972-06-08 Forming voids in concrete Expired GB1422788A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2673772A GB1422788A (en) 1972-06-08 1972-06-08 Forming voids in concrete
DE19732328273 DE2328273B2 (en) 1972-06-08 1973-06-04 METHOD FOR PRODUCING A MOLDING COMPOUND ON THE BASIS OF FOAMED POLYMERIZED PARTICLES WITH A WAX CONTENT
FR7320961A FR2187847B1 (en) 1972-06-08 1973-06-08
US05/520,068 US4136140A (en) 1972-06-08 1974-11-01 Moldable foamed polymer composition and a process therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2673772A GB1422788A (en) 1972-06-08 1972-06-08 Forming voids in concrete

Publications (1)

Publication Number Publication Date
GB1422788A true GB1422788A (en) 1976-01-28

Family

ID=10248438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2673772A Expired GB1422788A (en) 1972-06-08 1972-06-08 Forming voids in concrete

Country Status (3)

Country Link
DE (1) DE2328273B2 (en)
FR (1) FR2187847B1 (en)
GB (1) GB1422788A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115255267A (en) * 2022-08-12 2022-11-01 安徽沃尔曼新材料科技有限公司 Preparation method of formwork

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2914927A1 (en) * 1979-04-12 1980-08-07 Pelikan Ag FLOATING MODELING DIMENSIONS
FR2600566B1 (en) * 1986-06-02 1990-03-09 Polyfond S C METHOD FOR MANUFACTURING LOST MODELS WITHOUT WITHDRAWAL FOR FOUNDRY
US5176188A (en) * 1991-02-14 1993-01-05 E. I. Du Pont De Nemours And Company Investment casting method and pattern material comprising thermally-collapsible expanded microspheres
DE19718886A1 (en) * 1997-05-03 1998-11-05 Bosch Gmbh Robert Process for the production of porous moldings

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1219221B (en) * 1956-02-24 1966-06-16 Basf Ag Process for the production of molded articles from foamable styrene polymers and binders
GB1012277A (en) * 1963-02-14 1965-12-08 Monsanto Chemicals Foamable polystyrene and process for moulding it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115255267A (en) * 2022-08-12 2022-11-01 安徽沃尔曼新材料科技有限公司 Preparation method of formwork

Also Published As

Publication number Publication date
FR2187847A1 (en) 1974-01-18
DE2328273B2 (en) 1976-05-20
DE2328273A1 (en) 1974-01-03
FR2187847B1 (en) 1976-06-11

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Legal Events

Date Code Title Description
PS Patent sealed