An Improved Composition applicable for Cement, Artificial Stone, and the like.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
An Improved Composition applicable for Cement, Artificial Stone,
and the like.
I, CARL GUSTAF JULIUS FROSELL, of 46, Kommendorsgatan, Stockholm, in the
Kingdom of Sweden, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to a binding substance called by the inventor litholith
suitable for making artificial stones, bricks, etc. as also for the purpose of
cementing and coating other substances. It consists of burned magnesite or
dolomite and magnesium chloride or zinc chloride with addition of soluble salts,
such as phosphates or carbonates or stannates, or of stannic acid or of sulphate
of magnesia or other alkali. These additions are intended partly to make in-
soluble combinations (phosphate, carbonate, stannate or sulphate) with the lime
existing in the burned magnesite or dolomite, which would otherwise in the form
of slacked lime injuriously affect the cement; partly also for hardening the
magnesia cement to transform the not completely combined magnesium chloride
into a combination likewise insoluble and form a heat resisting compound,
(phosphate carbonate or stannate). In this way is procured a heat resisting
cement of very great durability. The proportions may be for instance 50 to
70 parts magnesite 30 to 40 parts crystallized magnesium chloride, and 2 to 5
parts of the above named ingredients.
In order more fully to indicate the application of the cement as a binding
material, the manufacture of artificial sandstone therewith may be given by way
of example. In this case sand is mixed with burned, well pulverized magnesite
or dolomite and is stirred with an aqueous solution of magnesium chloride or
chloride of zinc of about 1.32 specific gravity, whereupon the mass is formed and
having become somewhat stiff, it is treated with an aqueous solution of phosphate
of soda or some of the other above named substances, whereby uncombined
chloride or lime present is transformed into an insoluble form. After this the
whole mass is left to become entirely stiff in the air or under water. In the same
way one can combine pieces of marble and other kinds of minerals and stones,
metallic powder, broken-coal, vegetable and animal fibre, saw-dust, etc.
Dated this 18th day of October 1897

page_text: An Improved Composition applicable for Cement, Artificial Stone,
and the like. .
I, CARL GUSTAF JULIUS FROSELL, of 46, Kommendorsgatan, Stockholm, in the
Kingdom of Sweden, Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to a binding substance called by the inventor litholith,
suitable for making artificial stones, bricks etc., as also for the purpose of
cementing and coating other substances. It consists of burned magnesite or
dolomite and magnesium chloride or zinc chloride with addition of soluble salts,
such as phosphates or carbonates or stannates, or of stannic acid or of sulphate
of magnesia or other alkali. These additions are intended partly to make in-
soluble combinations; phosphate, carbonate, stannate, or sulphate, with the lime
existing in the burned magnesite or dolomite, which would otherwise in the form
of slacked lime injuriously affect the cement; partly also for hardening the
magnesia cement, to transform the not completely combined magnesium chloride
into a combination likewise insoluble and form a heat resisting compound
phosphate, carbonate or stannate. In this way is procured a heat resisting
cement of very great durability. The proportions may be for instance 50 to
70 parts magnesite, 30 to 40 parts crystallized magnesium chloride, and 2 to 5
parts of the above named ingredients.
In order more fully to indicate the application of the cement as a binding
material, the manufacture of artificial sandstone therewith may be given by way
of example. In this case sand is mixed with an equal weight of burned, well
pulverized magnesite or dolomite and is stirred with an aqueous solution of
magnesium chloride or chloride of zinc of about 1.32 specific gravity, whereupon
the mass is formed, and having become somewhat stiff, it is treated with an
aqueous solution of phosphate of soda, or some of the other above named sub-
stances, whereby uncombined chloride or lime present is transformed into an
insoluble form. After this the whole mass is left to become entirely stiff in the
air or under water. In the same way one can combine pieces of marble and other
kinds of minerals and stones, metallic powder, broken coal, vegetable and animal
fibre, saw-dust etc.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
A cement-like binding substance consisting essentially of burned magnesite
or dolomite and magnesium chloride or chloride of zinc mixed together with
aqueous solutions of phosphates or carbonates or stannates or stannic acid, or
sulphate of magnesia or of alkali.
Dated tins on day yo
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.