1920 MERRILL CREEK PKY 2018-01-01 MF Import

i SHANNON�SWILSON,INC. i by weight, based on the 3/4-inch fracfion. Fincs should be non plastic. An example of an � imported structural Sll material that has beer, used successfully under wet weather condidons on other projects is presented below The material with this gradation will be called select Igranulaz fill in this report. S1�Si7& Percent Passine I3 inch 100 I 1-1/4 inch 80 - 100 No. 4 20 - 70 No. 40 0 - 25 I No. 200 0 - 5' � " Non-plastic; less than five percent passing based on wet-sieving the soil fraction passing the 3/4-inch sieve. 8.4.5 Fill Placement and Comoaction ISwctural fill should be placed in uniform, horiwntal layers, not ezcceding 8 inches I in loose thiclmess for heavy equipment compactors and 4 inches for hand-operaced mechanical compactors. Within 3 feet of retaining walls, only hand-operdted compact�rs Ishould be used to protect the walis from damage. Fill should be compacted to a dense and , unyielding condition and to 95 percent of the ModiRed Proctor maximum dry density in structural areas and 90 percent in landscape areas. If subgrade or fill soils bacome loosened or disturbed, additional excavation to ' expose dense, undisturbed soils, and replacement with properly compacted structural fill will ' be required. 'The contractor may reduce disturbance by limiting cctnstruction traffic over subgrade soils and mstricting tcaftic to frequenUy used routes. These routes should be � prwided with a separator g^bteactile and �rushed rock or quarry spall surfacing. T'he use of , a cement-modified subgrade h��s been effective on previous projects to reduce disturbance as � a result of conswction uaffic. Other measures to reduce disturt�ance are discussed in the "Wet Weather Earthwork" secdon below. I Achieving the required compacdon during back811ing operations is usually di�cult in I small utility trenches, even during dry weather, because of the moisture sensitivity of till- i I W-6693-0i , 21