CM-5345 Infrastructure Evaluation Maintenance Renewal

Provide for neat and professional presentation of your work otherwise it will be considered non-compliant which will impact your grade Given: a 6 m wide X 10 m long X 6 m deep wet well has a spalled concrete area with a typical shape as shown in the drawing below on all four sides Based on field inspection, vertical #5 rebars in each side wall are spaced at 12" on center . Most of the rebars in the spalled areas are exposed with 50% of them having a residual area ranging from 0.15 to 0.27 sq in for a distance of 300 mm centered in the middle of the area to be repaired. Questions (Chart drawn to scale)(access https://www.basf.com/us/en.html & www.cimindustries.com for product selection appropriate for sewers use ) 2 pts 1) List the step by step procedure for repairing this deteriorated area (Hint: There are four sides to be treated) 2 pts 2) Calculate the area and the volume of the area to be repaired & show on chart & in section 2 pts 3) Propose the materials to be used for this repair & discuss the reason why it was selected 2 pts 5) If each unit costs $300 & the cost of other material & workmanship is $1250/SY, calculate the cost of the repair with 5% material waste 5 pts 6) The full area of the walls will be coated with either high build coal tar epoxy or two components polyurethane (P/U)(See websites noted above) List the step by step procedure for coating this area & select the most economical product assuming: The cost of a 5 gal unit of epoxy & P/U are $200 & $300 respectively, the cost of the primer/bonding agent is $25/gal for both and the cost of surface preparation & application is $100/SY. Your study will be over a period of 30 years where the wet well will have to be re-coated at 7 years if epoxy is used whereas it is @ 15 years for P/U Assume the cost of shutdown to perform the recoating work is $500,000 per occurance (Hint: Use Life Cycle Analysis) 2 pts 8) This repair work is in a wet well for sewer collection, what are the workers safety measures that you would employ & why