The New York herald., 1921-08-07
SUBURBS ARE USING
ASghALT MACADAM
Solves Paving Problem in New
Residential Districts Where
Traffic Is Light.

With housing conditions throughout
the country only slightly improved.
especially in the larger cities. and with
the continued desire on the part of most
city dwellers to have their homes in
suburban or residential sections I'm
stead Of in the heart OF city. the sub
ject OF developing new residential areas
has come to be OF great Importance
among city engineers and city planneHs.
To be successful. new home areas
must be beautiful and attractive, as
well as within a convenient distance of
the average persons place of work or
business. In making these new real
estate sections beautiful realtors and
city engineers have found that the
problem Of paved streets is one of the
first to be solved, and after consider
able study and planning they have de-
cided that the type of pavement in
newly developed home area must have
these features:
/. A pavement easily and quickly con-
structed.
2. Economical and low in first cost.
8. Beautiful in appearance and suit
able for the traffic it is toTundergo.
A pavement which has all these feat
ures and has proved 1t Is ideal for the
purpose is asphalt macadam. Extensive
use Of ii during the last decade has re-
suited in its adoption by many towns
and municipalities, as well as by real
estate concerns. to pave newly de%el-
oped residential districts. Among the
cities that have used 1t are Ashevllle
and Charlotte, y. c.: Baltimore. Nd.
and Chicago.
Adapted to Light Traffic.
Although the daily traffic over a
street in a suburban or residential dis
trict includes numerous vehicles. yet the
type of traffic is not the heaviest. 1t
usually includes pleasure automobiles or
Light commercial delivery machines.
Therefore a moro permanent type OF
pavement. like sheet asphalt, is not re-
CURED and the extra cost would not be
Justified Consequently asphalt mac
adam has been most satisfactorily used,
because it is durable and lasting under
the type of traffic specified, and in ad-
dition provides a beautiful, noiseless.
waterproof pavement, perfectly adapted
to the aesthetic surroundings Of resi-
Dental or suburban district.
This type OF pavement also has been
used extensively in and surrounding
large estates and country homes because
Of the facility with which II is laid and
the excellent manner in which 1t har-
monies with the usual charming sur
roundings of such places. Several OF
the most popular real estate develop
ments near Charlotte, y. c.. were paved
in 1916 with asphalt macadap by the
penetration method. and the streets IN
this locality have given excellent salts
faction. There are many blocks OF the
same type Of roadway in the fashionable
Grove Park section OF AsheUDe. y. g.
and the attention Of public ot9fiais ana
real estate concerns throughout the coun-
trv IS being directed to these pfvements
as an example of how asphalt macadam
may be used in developing new residen'
tial areas
There are two main parts 70 an
asphalt macadam pavement CD The
foundation. (2) the wearing surface.
The foundation may be either OF the
following: Macadam or gravel. IRE
spective OF type the foundation should
be solid, compact and OF sufficient depth
and the subgrade under the foundation
should be well drained and solid.
How 1t Is Constructed.
Two main materials make up the
wearing surface Of an asphalt macadam
pavement: 1) Broken stone (2)
asphaltic cement The steps in con-
structing the wearing surfaces are as
follows:
J. Spread clean coarse broken stone
over the foundation. This stone should
be from / to 21a inches in size, and
should be spread so as to give a mini
mum thickness of . u inches when COM
pacted.
2. Carefully roll the stone which has
tour and obtain the greatest possible
mechanical bond
8. Apply asphaltic cement by either
the hand pouring or pressure distributor
method, using from Ia to IA gallons
per square yard. The asphaltic cement
should be applied upiformly and is
heated to between 275 and $50 degrees
Fahrenheit, so that it will penetrate
thoroughly the entire depth of the wear
ing surface.
4. Spread clean q inch stone over
the entire surface Immediately after the
application Of the asphalt. These stone
chips should be dry and free from dust
S. Roll the entire surface until Il is
solid.
s. Remove all loose and surplus min
eral matter.
Z. Make the second application OF
asphaltic cement in the same manner as
The first application. The same grade
OF asphalt is used. but the quantity is
less, using from Il to u gallon per
square yard in the second coat
s. Spread a inch stone chips and then
roll thoroughly.
The above described manner OF con-
structing asphalt macadan1 roads is
called the penetration method. This
method gets its name from the fact
that the asphalt'c cement penetrstes and
coats the layers of broken stone after
they have been PLACED in the road. The
asphalt serves az an adhesive and bind
inE medium in forming the surface.
There are two methods Of building
asahalt macadam pavements By the
penetration method They arc the hand
pouring method and the pressure distrih-
utter method Both accomplish the same
purpose. only in one the asnhaltic
cement is applied by hand from pourins
cans and in the other the asrhaltic cem-
ent Is applied under pressure by an auto
mobile distributor.
Building Bess OF Hardvick.
Building Bess or Bess Of Hanawick,
lived IN Elizaoethan times, snd Y was