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Home My WebLink About1050 HOBBIT ST - R - 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 R Fort Collins, Colorado Soilogic #20-2026 Mr. Hagen: During the period, June 25 through July 22, 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 June 25, 2020, a Soilogic field engineer observed the footing areas and concrete forms placed for the footing foundations for the Building R 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 2, 2020, a Soilogic field engineer observed the reinforcing steel placed for the foundation walls for the Building R 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 R Fort Collins, Colorado Soilogic #20-2026 2 On July 2 2020, a Soilogic field engineer observed the grounding (UFER) steel for the Building R 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 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 4 of 44 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 #8 Application Location 20' N of SE Corner Mix Code 36NK22B46 Building D Footing Placement Date 6/25/20 Supplier Burnco 1131 Sample Time 11:00 AM Water Added On Site 3 Gallons Placement Type Chute Ticket #20277338 Batch Time 9:27 AM Truck # Sampled At (yards)Field Personnel JG Project Specifications and Test Results Test Specifications Results Slump (in) ASTM C-143 3" - 5"4" Air Content (%)ASTM C-231 5.0% - 8.0%5.0% Unit Weight (pcf)Field -145.8 Air Temperature @ Time of Placement -73 °F Concrete Temperature ASTM C-1064 90˚ Max 80 °F 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 - 41575 Cone/Shear 3308 346045425Cone/Shear 3615 Load (lbs)Failure Type (psi)(psi) ------ 3430 374050835Cone/Shear 4045 ------- 43105 Cone/Shear - Specimen Diameter = 4 in Specimen Cross-Sectional Area = 12.57 sq in ------ 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 20-2026 Summary of Cast-In-Place Concrete Test LANDMARK APARTMENTSFort Collins, Colorado General Set #11 Application Location 18' S of NW Corner Mix Code 30VL2166G Building D Foundation Walls Placement Date 7/2/20 Supplier Burnco 1280 Sample Time 2:35 PM Water Added On Site 5 Gallons Placement Type Pump Ticket #20279524 Batch Time 1:26 PM Truck # Sampled At (yards)Field Personnel JG Project Specifications and Test Results Test Specifications Results Slump (in) ASTM C-143 3" - 5"5 1/2" Air Content (%)ASTM C-231 5.0% - 8.0%7.0% Unit Weight (pcf)Field -142.0 Air Temperature @ Time of Placement -88 °F Concrete Temperature ASTM C-1064 90˚ Max 79 °F 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 - 43825 Cone/Shear 3487 322037005Cone/Shear 2945 Load (lbs)Failure Type (psi)(psi) ------ 4453 450057130Cone/Shear 4546 ------- 55955 Cone/Shear - Specimen Diameter = 4 in Specimen Cross-Sectional Area = 12.57 sq in ------ -of - 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 #18 Application Location 10' S by 10' W of NE Corner Mix Code 35VK20B4G Building D Floor Slab Placement Date 7/22/20 Supplier Burnco - Sample Time -Water Added On Site - Placement Type Pump Ticket #- Batch Time -Truck # Sampled At (yards)Field Personnel JG Project Specifications and Test Results Test Specifications Results Slump (in) ASTM C-143 3" - 5"4 1/2" Air Content (%)ASTM C-231 1.0% - 3.0%1.7% Unit Weight (pcf)Field -151.2 Air Temperature @ Time of Placement -68 °F Concrete Temperature ASTM C-1064 90˚ Max 72 °F Compressive Strength Test Results (ASTM C-39/C-31) Maximum Applied Compressive Strength Rounded Avg. 28-day Compressive Strength (min)4,000 psi See Below - 44035 Cone/Shear 3504 369048720Cone/Shear 3877 Load (lbs)Failure Type (psi)(psi) ------ 5430 542067915Cone/Shear 5405 ------- 68235 Cone/Shear - Specimen Diameter = 4 in Specimen Cross-Sectional Area = 12.57 sq in ------