The Bridgeport times and evening farmer., 1919-05-08
Historical Documents
The Facts About Warrenite

balanced by the sand and gravel in the aggregate above No. 20 mesh.
 Using the figures weights per square yard heretofore given one square yard of pavement ? inches thick would contain:
 Bitulithic sand and dust, 688 pounds; stone
 Topeka, sand dust 991 pounds; stone 12121 pounds.
 Excess sand in 1 yard of Topeka sOs pounds
 Excess stone in yard of bitutthic 2.57 pounds.
 Stone such is used by Warren Brothers Com pany, costs, delivered in Boston, approximately s1.5O good quality, suitable or btuminous pavement mixtures, costs about 70 cents per delivered. From these figures is apparent that the cost of the mineral aggregate btulithic and Topeka is for purposes of comparison fol- BituIithic ............... 1352 cents square yard Topeka ................-. 1905 cents square yard Excess cost for btuithic AT square yard
 The dust for filler included these figures.
 Against this excess for the mineral aggregate of bItuIltfllc there should be taken into account the comparative cost of the asphalt content in the mixtures.
 Columbia road analysis, bitutnio contains, approximately, 1882 pounds of asphalt square yard, costing about 1882 Topeka cohtalhS' aPproNlnatey' 22 pounds of asphalt per square yard, costing about 2 excess cost for Topeka of 15.18 cents square yard, slderhg stone sand and asphalt an excess cost for Topeka materials of II cents square same n eI'her case ana so heen not De considered here The prices recently submitted for Topeka contemplated the use of seal coat
 "second-As stone is difficult handle than is sand the cost of labor in handling materials great in bitulithic in the other two pave
 Any reason for this statement is difficult to
 
 imagine, as with the methods employed there o appreciable difference in handling material another Moreover, sheet asphalt, laid in two layers and requiring operations for mix and for placing and rolling the of handling is of necessity much more than for either Topeka bituIithic. Even if the statement true difference between bituth- ic and Topeka is small make any ncreas- ed expense that infinitesimaI.
 ''Third-The of haul is 50 in the of bitulithic because of additional weight of material moved"
 As already shown, there is ference in the weight of the material and in either of horses easily cartload of material; therefore this claim is not we'll found ed.
 of bituminous is used, which adds materially to is not used in either sheet asphalt Topeka"
 The reason Tor the use Of flush coat in btu- Iithic construction is account of the gregate used. It is impossible a surface will spaces m the integrates the pavement. The flush a cessity the of pavements which sheet asphalt Topeka, which do not have the inherent" weaknesses of pavements of gregate. The Boston specifications provide for a flush Topeka. The to form of the aggregate between the iron tires of stone the consequent crushing of
 In this connection the attention mission is called to three manner in which the various types of pavements discussion in n streets:
 Sample No. 1 is sample bitulthic tainng comparatively large stones Particular should be taken of the fact some of these stones have evidently been crushed by the iron of carts carrying heavy loads. of stones of bitulithie Is crushed makes a. large hole in the pavement compared witt same action either Topeka sheet asphalt pavement, and spot from which disintegraton spreads very rapidly.
 (continued Tomorrow)