Universal Portland Cement Co., C. W. Boynton · Universal Portland Cement Co. · leaf 38
pliedindependent of the base, it should be a mixture of about 1part Portland cement with 1^ parts good, clean, coarse sand, orscreenings. See Table C. If the top is to be tamped downwith the base, the consistency should be such as to permit of thor-ough tamping. A top to be floated must be mixed… … Figure 17. To Avoid Loose Tops. The placing of the top finish should receive the closest attention. Loose tops are altogethertoo common, and sooner or later the base becomes uncovered.See Figure 18. In all cases, the top should be applied as quicklyas possible after the base is tamped into…
