Ch. 35 - Site Work Flashcards
Soil is classified into four groups. What are they?
Sands and gravels, silts, clays, and organics
T/F Sand and Gravel are good bases for a building foundations.
True
What are soil tests used to determine?
Bearing Capacity, Water Table Level, and Porosity.
Foundations below the water table are subjected to _________________.
Hydrostatic Pressure
With all types of fill there is an optimum relationship between the fill’s density and moisture content. What method is used to determine this?
Proctor Test
_______ is the preloading of the ground with fill material to cause consolidation and settlement of underlying soil before building.
Surcharging
How thick should concrete paving be?
5” minimum
Expansion joints should be placed every _____ feet for concrete paving.
20’
How thick should a concrete walk be?
4”
Control joints are place every ____ feet and expansion joints every ____ feet on a concrete walk.
5’; 20’
_________ Is a fine grained sedimentary soil composed of material smaller than sand but larger than clay, and slightly plastic in their behavior.
Silt
_______ are composed of smaller particles than silts, have cohesion or tensile strength and are plastic in their behavior when wet.
Clays
_____ are materials of vegetable or other organic matter, and make poor bases for foundations
Organics
What does Hardpan mean when referring to clay sand or gravel
It is an unbroken mixture of clay, sand or gravel
What are the 6 methods of soil treatment?
Drainage Fill Compaction Densification Surcharging Mixing
