Ontario Sessional Papers, 1904, . ure is «>vaporatedfrom the surface of the road, the linestuff contracts, wheels and horseshonls(liseii^auc tlie laru(M- Dvot rudiiii stones,and from merely making a rough sur- contains an excess of fine stuff, clayor loam. Clay and loam in gravel aidin producing a pleasant road when theweather is neither too dry nor too aljsorb water readily, and inrainy weather the bond dissolves, theroad becoming soft and muddy. Con-taining so much water, the action offrost on clay is very mirked, so thatwhen clay is mixed with gravel, theroad ruts easil
Ontario Sessional Papers, 1904, . ure is «>vaporatedfrom the surface of the road, the linestuff contracts, wheels and horseshonls(liseii^auc tlie laru(M- Dvot rudiiii stones,and from merely making a rough sur- contains an excess of fine stuff, clayor loam. Clay and loam in gravel aidin producing a pleasant road when theweather is neither too dry nor too aljsorb water readily, and inrainy weather the bond dissolves, theroad becoming soft and muddy. Con-taining so much water, the action offrost on clay is very mirked, so thatwhen clay is mixed with gravel, theroad ruts easily in the spring, and thegravel may even be cut through. Iron oxide, when coating the frag-ments of gravel to such an extent asto cement them together, is one of thebest binders, and such ferruginous gra-vels make an exceedingly durable andwateiproif road covering. A finely pow-dered silica, resembling clay in ajjptMv-ance, is an evcellent bindor. TJtiio-^Ioiiogravels, or others which contain frag-ments of certain kinds of shale, or iron-. The Rake is NtHHk<i. face, they are soon rolling loosely onthe roadway. With stone greater thanone and oiu-hah inches m diameler, itis difhcuit to keep the road from thusunravelling, in the period of hot wea-ther. On the other hand, if the gravel istoo tine, it is apt to partake of the nature of sand, and may not bind gravel is usually betlter than lakegravel, as the latter is smooth andwater-worn, while there is a deficiencyof line material; the rougher and moreangular fragments of pit gravel, andthe presence of fine stuff in proper pro-portion, enabling the pit gravel to bindmore perfectly. While fine material, even a certainamount of powder, is of value in as-sisting the binding and cementing pro-cess, yet one of the most seriousfaults of gravel in Ontario is that it stone, pulverize read;ly under the actionof trallic and weathci. ana these lorma dust, which is vastly superior to clayas a binder. For this reason a softerlime
Size: 2339px × 1069px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorontariol, bookcentury1900, bookdecade1900, bookyear1904
