Daily national Republican. (Washington City [D.C.]) 1870-1872, 1872-04-11
CONCRETE PAVEMBNfS
RrrORr OF THE coMMrssroS.
The Kind- apd Qualities 10 Use What h
Needed 10 Make Is Perfsct-A ThsrsuHh
Review % the Whsle Subject.


Review % the Whsle Subject
This commission, which met by Invitation OF
Hon. N. q. stsbbins, president Of the park com.
mission, New York, to inquire into and report
upon the subject Of concrete pavsments, have
concluded their iabors and submitted their 70.
port. ID
The commission met March ~ and II In New
York, and March 70 and n In Philadelphia. aud
they report that during this period they exam.
notably those In the parks and public squares. OF
the large number aud variety put duwn In this
country Il may BE- stated that good samples Of
the most important OF those which seemed TO
offer any reasonable hope II success were found
on one OF all Of these aquarea and presented all
the advantages Tor Obsotvatoh rs TO length Of
time laid. abrasion 10 which thoy had been eN.
posed, and conditions uuder such exposure,
which the board deemed Of value for the pur.
poses Of their investigation. The payements %
sxaminsd were put down by the following com
pAny, the Soharl Pavement Company, the Ora
hanite Asphalt Pavement Uompany, the Evans
Pavement COMPANY, the Day Nulcanite Pave.
ment Company, together with sumo ohers,
whose operations had been too limited TO war.
rant special mention.
periods from tho year 1897 10 date, exhibited
favorable conditions as TO wear, presented
smooth, wellformsd and compact surfaces, with
falr Indications Of continued durability. Nearly
one hundred patents for concrete pavements
have been issued, and, referring TO this fact tho
report says, whom y IL turther observed that,
for the purpose Of fulhlling the nlmsy require
mitied TO include In their speoIncaiions, under
the pretenco Of using them as necessary ingre.
dlenlB, such rubbish as saudust, shavings, char.
lloned how lar the operations OF that b, anch OF
tho Government serves TO foster and encourage
honest talent and industry.
Lees than fifteen Of these patented compost.
lions present to-day any claims TO the attention
OF practical men, and perhaps not one half Of
these more than partially succeeded, and some
have totally fniled for want OF correct knowledge
AMI experience In combating and manipulating
materials on the part Of the pAtontee.
A pavement composed Of broken stone, gravel
sand, or their equivalents " they can be fOund
erly prepared, VIII, without doubt, make choaT
and durable roadway, but no process now In use
offers such conditions OF uniformity In thu
manipulation Of the work as to, warrant Assur
ances OF substantial success.
Tho Unanimous limestone Of France, which1l
used both In that country and London, 10 the
best material known for this class Of work. II
contains ninety partl Of carbonate Of llme 70 tet
parts Of bltumen. No stone 10 equal that hal
yet been discovered In This country, aud whal
effect this chanKeahle climate will have on Il q
Of course unknown. Samples are 10 be laid herr
IL has not been possible, 90 far, 10 produce, b,
any mechanical means a composition Ehiet
hee,s the neoet.itles ~ hpsfomSn = nel -
the nmes'phe. hsPhAt mi eoaitaI pi.u,nen
however, hNe oeon suo,ututeu hnu hnsNo
WY Neh, AltnVutn moch ~ ". 70 " leatne.
o. lheif onenllcal ana m,ohan,eal ueatmen nv
One o. tne pIlhelpa otJeouohs W ssphsu ~ w
nAnneI IN Nnien " y Psepsred IOr shipnlent
me opeiation o. Isnhlng eetns very lmpet
ieet when seiionsy impairs w ysiue, aha len
| deIt somewhat uncettalnt Tue results nnete hkes
rules A. 20 qIantltlss have been establishsd. i
/ Also thought thAt tneIe nA se,lous opleotioi
70 me manner " WHEN me nphat ~ treaIe,
lor the purpose OF separating these foreign suo
stances, ~
Inc neat - also anpned IN an irregular an
unsystematlc manner, VIE sueh earelessnss !,