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UNITED STATES PATENT OFFICE.
CHARLES E. BABGLEBAUGH, OF DALLAS, TEXAS.
CONCRETE COMPOSITION.1,287,827.
No Drawing.Specification of Letters Patent.
Patented Dec. 17,1918.
Application fled March 20, 1918. Serial No. 223,568.
To all whom it may concern:
Be it known that I, CHARLES E. BARGLE-
BAUGH, a citizen of the United States, and
a resident of Dallas, in the county of Dallas
5 and State of Texas, have invented certain
new and useful. Improvements in Concrete
Compositions, of which the following is a
specification.
My invention relates to improvements in
10 compositions of matter, more especially to
a concrete composition, and it consists in the
product hereinafter described and claimed.
An object of my invention is to provide a
concrete which has great strength in com-
15 parison with its weight, or in other words,
a concrete which is relatively light.
A further object of my invention is to
provide a concrete composition which may
be economically made, due to the fact that
20 one of the main ingredients is found in vast
quantities in certain parts of the country.
A further object of my invention is to
provide a concrete of a dark color due to the
use of crushed rock and aggregate of vol-
25 canic origin known as lava rock, without
any addition of coloring matter.
A further object of my invention is to
provide a concrete construction in which the
use of ordinary sand is dispensed with.
30 Other objects and advantages will appear
in the following specification -and the novel
features of the invention will be particu-
larly pointed out in the appended claims.
In carrying out my invention I make use
35 of lav rock which is found in large quanti-
tienin the western part of the United States
and in the southwestern part as well. This
lava rock is of a basaltic nature and con-
tains a high proportion of silica. It exists
40 in large masses and has theapearance of
honey-comb, being formed of numerous cells'
defo the action of the volcanmc gases~-T'he
rock itself is relatively light and is easily
crushed on account of its porous construc-
45 tion.]
In preparing the concrete, I first cru
this rock and then rind it, preferably to
100 mesh. The groun rock may then be
srieien f and the screened material is used
5o in li""or the sand of the ordinary concrete.I prefer to use as aggregate ieces of the
rock itself. These are crus e o sma
piees of the size of approximately one h
in diameter.The proportions of cement,
ground rock and aggregate are preferably- 55
1 of cement 1i of round rock and 3 rts
o ea a t oug o course the con-
cre aemay a made of, other proportions
without departing froin'the spirit or scope
of the invention. The concrete is formed 60
by mixing these ingredients and treating
with water in the ordinary way, after which
the wet mass is allowed to set.
A concrete formed in the manner de-
scribed and of the ingredients mentioned has 65
very valuable properties. It weighs ap-
proximately 110 lbs. per cubic foot as
against 150 lbs. per cubic foot of ordinary
concrete. The breaking strength of ordi-
nary concrete is substantially 2400 lbs. per 70
square inch, that is to say under compres-
sion, while with the concrete which forms
the subject of this invention the breaking
strength is 2600 lbs. The tensile strength
of the ordinary concrete is 190 lbs. as 75
against 212 lbs. of the concrete formed as
described above.
The concrete does not require coloring
matter in order to make a dark gray con-
crete, such as that used for pavements and $0
the like. The ordinary concrete does require
coloring matter in order to obtain a wall or
pavement which is dark gray. My concrete
is waterproof, whereas the ordinary con-
crete is not. 85
Another feature to which I desire to call
attention is that the ground rock consists of
small particles which are sharp and which
therefore readily adhere to the cement. In
this, the ground rock differs from the very 90
fine sand, since the latter is generally smooth
and will not form a strong concrete. The
concrete formed with the lava rock has a
relatively low absorption due to its water-
proof qualities. 95
I claim:-
1. A concrete composition comprising a
mixture of cement, ground lava rock of sub-
stantially 100 mesh fineness, and aggregate,
in substantially the following proportions, 100
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Charles E. Barglebaugh. Concrete Composition, patent, December 17, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257251/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.