NL7712056A - Press moulding mixts. of gypsum, cement and sand - with defined relation between strength, pressure and sand content - Google Patents

Press moulding mixts. of gypsum, cement and sand - with defined relation between strength, pressure and sand content

Info

Publication number
NL7712056A
NL7712056A NL7712056A NL7712056A NL7712056A NL 7712056 A NL7712056 A NL 7712056A NL 7712056 A NL7712056 A NL 7712056A NL 7712056 A NL7712056 A NL 7712056A NL 7712056 A NL7712056 A NL 7712056A
Authority
NL
Netherlands
Prior art keywords
sand
cement
gypsum
content
mixts
Prior art date
Application number
NL7712056A
Other languages
Dutch (nl)
Original Assignee
Stamicarbon
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 Stamicarbon filed Critical Stamicarbon
Priority to NL7712056A priority Critical patent/NL7712056A/en
Publication of NL7712056A publication Critical patent/NL7712056A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

Prodn. of moulded articles (e.g. building blocks or bricks) is carried out by pressing a mixt. of gypsum (CaSO4.2H2O), cement and sand. The cement content is 8-15 wt.% (based on dry gypsum and sand) and the moisture content is >5 wt.%. The improvement lies in the fast that, starting from a given compressive strength D (in kg/cm2), the applied pressure P (in kg/cm2) and the sand content S (in wt.% based on dry gypsum) are determined by the relation D=2.6x103 (100-S)-1.2P0.43. The D value obtd. can vary by +10% of the indicated value depending on the cement used and the moisture content. Compared with the process of the Parent Patent (using a relation based on a fixed P value of 150kg/cm2), this process allows greater flexibility in the choice of P, S and D values.
NL7712056A 1977-11-02 1977-11-02 Press moulding mixts. of gypsum, cement and sand - with defined relation between strength, pressure and sand content NL7712056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7712056A NL7712056A (en) 1977-11-02 1977-11-02 Press moulding mixts. of gypsum, cement and sand - with defined relation between strength, pressure and sand content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7712056A NL7712056A (en) 1977-11-02 1977-11-02 Press moulding mixts. of gypsum, cement and sand - with defined relation between strength, pressure and sand content

Publications (1)

Publication Number Publication Date
NL7712056A true NL7712056A (en) 1979-05-04

Family

ID=19829464

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7712056A NL7712056A (en) 1977-11-02 1977-11-02 Press moulding mixts. of gypsum, cement and sand - with defined relation between strength, pressure and sand content

Country Status (1)

Country Link
NL (1) NL7712056A (en)

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Legal Events

Date Code Title Description
A1B A search report has been drawn up
BV The patent application has lapsed