A contractor is planning to build a concrete wall which is 15 feet high, 100 feet long, and 18 inches thick. The contractor has enough forms to erect 200 square feet of wall at a time. The unit cost for form labor and material is $5.50/SF for the initial concrete placement. Forms will be re-used. Form costs are 20% of the initial for each successive concrete placement. What is the total formwork cost to construct the wall?
A contractor is planning to build a concrete wall which is 15 feet high, 100 feet...
Design the wood wall formworkfor a 14’ - 10” (14.8 ft) high wall to be placed at the rate of pour of 4 ft per hour, internally vibrated. Assume the mix is made with Type I cement, with no pozzolans or admixtures, and that the temperature of concrete at placing is 75oF. The unit weight of concrete is 150 lbs/ft3with a slump of 3 inches. The forms will have continuing reuse. Assume that deflection is limited to l/360 of the...
Design the wood wall formworkfor a 14’ - 10” (14.8 ft) high wall to be placed at the rate of pour of 4 ft per hour, internally vibrated. Assume the mix is made with Type I cement, with no pozzolans or admixtures, and that the temperature of concrete at placing is 75oF. The unit weight of concrete is 150 lbs/ft3with a slump of 3 inches. The forms will have continuing reuse. Assume that deflection is limited to l/360 of the...
12. A slab on grade measures 120 long x 60" wide x 2' 6" thick. What is the cost to form the slab if formwork costs S1 per square foot of contact area? A. $72 B.S90 C.S162 D.S180 13. A place concrete' activity requires the placement of 2,080 cubic yards. If the individual production rate is 2 cubic yards per workhour per person, with a 10-person crew and 8-hour workday, how many days are needed to complete this activity? A....
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10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...