Bluefield evening leader. [volume] (Bluefield, W. Va.) 1906-1911, 1908-06-16

ROAD READY FOR O1LIN0.
present surface like asphalt pave
ment Is just In It's Infancy In southern
California. says the Los Angeles
Times. In Pasadena there are a mum.
Der OF streets OF this kind, notably
Madison avenue. prepared at n cost OF
IL cents per square foot and with u
depth Of seven inches OF foundation
Blocks of this street are scarcely dis
tinguishable from asphalt paving
There are others similar, but some are
not equal to this. At the same time
they are superior to those prepared I'm
the old way
The new method of macadamIzlnR
and oiling as laid down I'm set of
specifications used for number OF
streets may be outlined substantially
as follows: For the foundation grading
Is done by the removal OF all earth,
stone, loose rock, cement, shale, hard
pan, etc, TO n depth OF seven inches
below the intended finished surface
and to farther depth OF two feet be-
low the subgrade whenever mud, sand
or other soil material Is encountered
the space TO be refllled with good
earth or gravel. Tho whole Is rolled
with n roller of not less than twelve
tons I'm weight until the surface IL I'M
yielding, all depressions made by the
roller being filed up and rolled again
All portions that cannot be reached by
the roller must be tamped solid, and
the rolling must not be done In wet
weather or when the ground is soft
and muddy. This subgrade must be
checked by the street superintendent
before proceeding with work.
On this grade a bottom course of
macadam Is laid consisting OF stone
not exceeding three inches In diameter
and not less than one and half Inch
es. This layer Will be five inches In
thickness and Is rolled with n twelve
ton steam roller until the stone ceases
to sink under the roller or to creep I'm
front of It
A top course OF stone between three
fourths OF an inch and an inch and q
half I'm diameter Will cover this TO
depth OF two inches and Will be rolled
as before after first coating OF oil
(onc-half a gallon to the square yard
Is applied evenly so as to saturate the
entire top layer. Then all voids are
filed in with rock screenings OF the
same material as the macadam not ex-
ceeding three quarters OF an inch I'm
diameter, with a top dressing OF the
same material laid TO the depth OF half
an inch, after which there IL given
second coating Of oil 20 the same
amount as before and the whole rolled
and tamped until no evidence OF the oil
remains on the surface except as
shown In the color Of the screenings
Sharp sond Is to be sprlnklcd wherever
any oil remains TO absorb II. These
specifications provide that oil shall be
Of 10 to IL gravity, with 50 per cent
asphaltum at 80 penetration and with
not more than per cent water.
The Pacific Electric and Los Angeles
Tnterurban railways are using this
method on their rights Of way I'm Pasa-
dena, Long Beach and one or two
other points. IL is said TO DO better
than the use OF asphalt, as II gives
with the pressure Of tho rails under
weight OF cars and can 10 taken up
and replaced without difficulty. IL does
not crack and lump, as does the as
phnlt II is hard 10 tell II from the
latter, sometimes impossible, for the
average person. In Long Beach the
result has been very good.