Show Considers Use the Of Soil foil Cement City officials and engineers are seriously considering the use of soil-cement soil for the thep streets of or Bountiful Bountiful Bountiful Boun Boun- p paving ving of the bringing up the tile question What is soil-cement soil SOIL-CEMENT SOIL is a simple highly compacted mixture of soil portland cement and wa war ter As the cement hydrates the mixture becomes a hard durable paving material Soil cement paving requires little litHe maintenance and it is isone isone one aIle of the few materials in m the world which actually grows stronger with age I TILE THE BASIC idea of soil soil soil-ce ce- ce I ment is not new In the early state highway departments departments departments depart depart- ments of Iowa and South Dakota Dakota Dakota Da Da- Da- Da kota tried mixing cement with roadway soil About the same time the Ohio State Highway Department used cement to strengthen soil In 1935 Portland Cement Association Association As As- cooperated with the South Carolina State Highway Department and the Bureau of Public Roads in building a 1 mile experimental project THIS WORK prompted other oth oth- er cr states stales sates to build soil-cement soil roads and in hi 1930 projects were constructed in Michigan l Illinois Wisconsin and Mis Mis- Misi i I Compared with wilh today's practices practices practices tices the methods used to build these projects were crude at best yet near nearly all allare allare allare are still carrying traffic OTHER TERMS have bave often been applied to soil Some of or these arc are cement treated base cement soil soU and stabilized ag ag- ag- ag But call it what you will its it's all soil Most soil-cement soil streets are arc six inches thick and this thickness can be reduced if il the is stable On the theother theother theother other hand high volumes of traffic may call can for thickness thickness- es of eight inches or more AN ADVANTAGE of soil soil- cement is that it can cun be engineered engineered engi engi- to carry earo whatever loads are present Soil cement Soil cement is compacted to high density As the cement hydrates the mixture hardens in that state It n does docs not consolidate further wIder under traffic nor does it rut or tI Shove hove during spring thaws Soil-cement Soil can bridge over local weak It Il does not soften when exposed to extreme extreme extreme ex ex- exI I wetting welting and drying or freezing and thawing j |