Rodarte Construction Inc Everett Station Parking Expansion

I 1 3. Remove concrete within the repair area to a depth at least matching the I 2 cut depth at the edges. Large variations in the depth of removal within 3 short distances shall be avoided. Roughen the concrete surface. The I 4 concrete surface should be roughened to at least Concrete Surface 5 Profile (CSP) 5 in accordance with ICRI Guideline No. 310.2R, unless a 6 different CSP is recommended by the patching material manufacturer. I 7 8 4. Inspect the concrete repair surface for delaminations, debonding, 9 microcracking and voids using hammer tapping or a chain drag. Remove I 10 any additional loose or unsound concrete in accordance with steps 1 11 through 3. 12 13 5. Select a patching material in accordance with Section 9-20.2 that is I 14 appropriate for the repair location and thickness. The concrete patching 15 material shall be pumpable or self-consolidating as required for the type 16 of placement that suits the repair. The patching material shall have a _ 1 17 minimum compressive strength at least equal to the specified 18 compressive strength of the concrete. 19 20 6. Prepare the concrete surface and reinforcing steel in accordance with the I 21 patching material manufacturer's recommendations. At a minimum, clean 22 the concrete surfaces (including perimeter edges) and reinforcing steel 23 using oil-free abrasive blasting or high-pressure (minimum 5,000 psi) I 24 water blasting. All dirt, dust, loose particles, rust, laitance, oil, film, 25 microcracked/bruised concrete or foreign material of any sort shall be 26 removed. Damage to the epoxy coating on steel reinforcing bars shall be I 27 repaired in accordance with Section 6-02.3(24)H. 28 29 7. Construct forms if necessary, such as for patching vertical or overhead I 30 surfaces or where patching extends to the edge or corner of a placement. 31 32 8. When recommended by the patching material manufacturer, saturate the 33 concrete in the repair area and remove any free water at the concrete I 34 surface to obtain a saturated surface dry (SSD) substrate. When 35 recommended by the patching material manufacturer, apply a primer, 36 scrub coat or bonding agent to the existing surfaces. Epoxy bonding I 37 agents, if used, shall be Type II or Type V in accordance with Section 9- 38 26.1. 39 I 40 9. Place and consolidate the patching material in accordance with the 41 manufacturer's recommendations. Work the material firmly into all 42 surfaces of the repair area with sufficient pressure to achieve proper 43 bond to the concrete. I 44 45 10. The patching material shall be textured, cured and finished in accordance 46 with the patching material manufacturer's recommendations and/or the I 47 requirements for the repaired component. Protect the newly placed patch 48 from vibration in accordance with Section 6-02.3(6)D. 49 I 50 11. When the completed repair does not match the existing concrete color 51 and will be visible to the public, a sand and cement mixture that is color City of Everett Page AM-34 Amendments I Everett Station 80 Stall Parking Expansion June 2019