You have been hired as the Project Engineer for a development company in South Florida to build 610 housing units surrounding four lakes. Since the original ground is low, you will use the limestone excavated from the lake to fill the land in order to build roads and housing pads. Your estimated fill requirements are 700,000 m3 , with a dry density equivalent to a voids ratio e = 0.46. The “in-situ” limestone extracted from the lakes has an e = 0.39, whereas the limestone dumped into the trucks has an e = 0.71. How many truckloads will you need, if each truck carries 10 m3 ?

In the construction of a highway, 10000 m3 of filling material with a void ratio of 0.75 is taken from the borrow pit. This material is laid in 20 cm thickness on the 10 m wide highway with a void ratio of 0.45. How many roads can be made with this material?

WHAT IS THE POROSITY OF THE SOIL IF THE TOTAL VOLUME IS 0.3m3 AND VOLUME OF VOIDS IS 0.15m3? * Your answer

If the material is a dry clay, which of the following is likely to weigh the least? one bank cubic yard one loose cubic yard one compacted cubic yard

If given bulk density is 1700kg/m3 and dry density is 1250kg/m3. Determine moisture content? 0.36% O 1.36% 36% O 136%

A 8ft clay layer reaches 100% consolidation in 13 years and has a natural water content of 75%, what is the secondary compression settlement in the soil if the building life is expected to be 45 years. Report your answer to three decimal places and in inches. Coefficient of Secondary Compression, Ca 0.04 0.03 0.02 0.01 Type your answer... wy 50 Average Ca for Completely Remolded Samples Falls in This Zone 100 150 200 Natural Water Content, % FIGURE 7-21 Coefficient of secondary compression; C = ratio of decrease in sample height to initial sample height for one cycle of time on a logarithmic scale following completion of primary consolidation. Source: U.S. Department of the Navy (1971). Range Undisturbed Samples: Ca in Range of Virgin Compression Cain Range of Recompression Lies Below This Upper Limit 250 300 350 400

Answer the void less clay content in aggregate lead to enhance ……………

On a construction site, the engineer discovered a high clay content in amaterial which was to be used. Explain what influence a high clay contentwill have if used for construction.

Suppose that you are a Project Engineer on a Dam project. The volume of soil required at the dame site is Vd=100,000m3. The final void ratio (ed) is 0.80. Your boss, the Project Manager delegates to you the important decision of buying the earth fill from one of three suppliers. • Supplier X sells fill at OMR. 0.200/m3 with e = 0.90• Supplier Y sells fill at OMR. 0.120/m3 with e = 2.00• Supplier Z sells fill at OMR. 0.150/m3 with e = 1.60Evaluate and select the best supplier based on your knowledge about soil compaction.

Problem 15: A proposed earth dam project will contain 7,000,000 m of compacted earth fill having a porosity of 0.4. There are three quarry pit sites nearby A, B and C. It is required to determine the most economical solution to this construction project based on the overall transport cost. Transport Cost S/tonne Bulk density kg/m³ 1950 2000 Pit Site Void ratio 1.24 1.05 0.31 0.34 A 1.16 0.33 2140