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Home My WebLink About1050 HOBBIT ST - Q - SPECIAL INSPECTIONS - 2/16/2021 Soilogic, Inc. 3522 Draft Horse Court • Loveland, CO 80538 • (970) 535-6144 February 16, 2021 ARCO Construction Company 9494 Manchester Road St. Louis, Missouri 63119 Attn: Mr. Patrick Hagen Re: Construction Materials Testing and Observation Services Report Landmark Apartments Building Q Fort Collins, Colorado Soilogic #20-2026 Mr. Hagen: During the period, July 10 through August 18, 2020, Soilogic Inc. (Soilogic) provided construction materials testing and observation services for the referenced project. Our services were provided on a part-time basis and included reinforcing steel observations and the observation and testing concrete delivered to the site for placement. Results of the observation and testing services completed during the referenced period are included with this report. On July 10, 2020, a Soilogic field engineer observed the footing areas and concrete forms placed for the footing foundations for the Building Q prior to concrete placement. The verification of void form placement was also completed at that time. At the time of our site visit, the footing areas and concrete void forms observed appeared to have been placed in general compliance with the provided construction plans (Infusion Architects LLS, Plan# LSD2277). On July 20, 2020, a Soilogic field engineer observed the reinforcing steel placed for the foundation walls for the Building Q prior to concrete placement. At the time of our site visit, the reinforcing steel observed appeared to have been placed in substantial compliance with the provided construction plans (Infusion Architects LLS, Plan# LSD2277). Construction Materials Testing and Observation Services Report Landmark Apartments Building Q Fort Collins, Colorado Soilogic #20-2026 2 On July 20, 2020, a Soilogic field engineer observed the grounding (UFER) steel for the Building Q prior to concrete placement. Three (3) #5 rebar was observed to be installed within the foundation wall forms and extending out of the forms in the north east and north west corners of the building. During the referenced period, Soilogic personnel observed and tested cast-in-place concrete delivered to the site for construction of the footings, foundation walls and floor slabs. The testing completed in the field included slump, air content, unit weight, concrete temperature, and ambient air temperature at the time of placement. Test cylinders were molded from representative samples of the plastic concrete for laboratory curing and compressive strength testing. Results of the field and laboratory tests performed during the referenced period are included with this report. Results of laboratory concrete compressive strength tests completed during the referenced period are also included and will be provided as they become available. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the enclosed information or if we can be of further assistance to you in any way, please do not hesitate to contact us. Very Truly Yours, Soilogic, Inc. Jason Horner, P.E. Project Engineer 3 of 40 Age Specimen (days) 1.3a 3 1.3b 3 1.7a 7 1.7b 7 1.14a 14 1.14b 14 1.28a 28 1.28b 28 1.56a 56 1.56b 56 - Specimen Diameter = 4 in Specimen Cross-Sectional Area = 12.57 sq in ------ 4288 452059610Cone/Shear 4744 ------- 53890 Cone/Shear - 38730 Cone/Shear 3082 312039770Cone/Shear 3165 Load (lbs)Failure Type (psi)(psi) ------ Compressive Strength Test Results (ASTM C-39/C-31) Maximum Applied Compressive Strength Rounded Avg. 28-day Compressive Strength (min)3,000 psi See Below Unit Weight (pcf)Field -142.8 Air Temperature @ Time of Placement -99 °F Concrete Temperature ASTM C-1064 90˚ Max 79 °F Slump (in) ASTM C-143 3" - 5"4 3/4" Air Content (%)ASTM C-231 5.0% - 8.0%5.0% Project Specifications and Test Results Test Specifications Results Sampled At (yards)Field Personnel JG 1281 Sample Time 3:10 PM Water Added On Site 8 Gallons Placement Type Pump Ticket #20281458 Batch Time 2:14 PM Truck # Location Building C Footing Mix Code 30VK21C6G Building C Footing Placement Date 7/10/20 Supplier Burnco General Set #16 Application 20-2026 Summary of Cast-In-Place Concrete Test LANDMARK APARTMENTSFort Collins, Colorado 4 of 70 Age Specimen (days) 1.3a 3 1.3b 3 1.7a 7 1.7b 7 1.14a 14 1.14b 14 1.28a 28 1.28b 28 1.56a 56 1.56b 56 - Specimen Diameter = 4 in Specimen Cross-Sectional Area = 12.57 sq in ------ 4544 459058370Cone/Shear 4645 ------- 57105 Cone/Shear - 45095 Cone/Shear 3589 350042760Cone/Shear 3403 Load (lbs)Failure Type (psi)(psi) ------ Compressive Strength Test Results (ASTM C-39/C-31) Maximum Applied Compressive Strength Rounded Avg. 28-day Compressive Strength (min)3,000 psi See Below Unit Weight (pcf)Field -141.6 Air Temperature @ Time of Placement -88 °F Concrete Temperature ASTM C-1064 90˚ Max 77 °F Slump (in) ASTM C-143 3" - 5"4" Air Content (%)ASTM C-231 5.0% - 8.0%6.5% Project Specifications and Test Results Test Specifications Results Sampled At (yards)Field Personnel JG - Sample Time -Water Added On Site - Placement Type Pump Ticket #- Batch Time -Truck # Location 20' S of NW Corner Mix Code 30VL2166G Building C Foundation Walls Placement Date 7/19/20 Supplier Burnco General Set #17 Application 20-2026 Summary of Cast-In-Place Concrete Test LANDMARK APARTMENTSFort Collins, Colorado 2 of 40 Age Specimen (days) 1.3a 3 1.3b 3 1.7a 7 1.7b 7 1.14a 14 1.14b 14 1.28a 28 1.28b 28 1.56a 56 1.56b 56 20-2026 Summary of Cast-In-Place Concrete Test LANDMARK APARTMENTSFort Collins, Colorado General Set #25 Application Location 5'N 5'E SWC Bldg C Mix Code 35VK20B4G Slab Bldg C Placement Date 8/18/20 Supplier Burnco 1131 Sample Time 8:00 AM Water Added On Site 5 gallons Placement Type Pump Ticket #20292511 Batch Time 6:34 AM Truck # Sampled At (yards)Field Personnel LK Project Specifications and Test Results Test Specifications Results Slump (in) ASTM C-143 3-5"7" Air Content (%)ASTM C-231 N/A 2.0% Unit Weight (pcf)Field -144.8 Air Temperature @ Time of Placement -64 °F Concrete Temperature ASTM C-1064 90˚ Max 60 °F Compressive Strength Test Results (ASTM C-39/C-31) Maximum Applied Compressive Strength Rounded Avg. 28-day Compressive Strength (min)3500 PSI See Below - 32795 Cone/Shear 2610 267034325Cone/Shear 2731 Load (lbs)Failure Type (psi)(psi) ------ 3458 354045505Cone/Shear 3621 ------- 43450 Cone/Shear - Specimen Diameter = 4 in Specimen Cross-Sectional Area = 12.57 sq in ------