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Section 90 Training Examples

Section 90 Training Examples. By Dulce Rufino Feldman Doran Glauz Tom Ruckman. Equation 1 (ASR). Where: UF = Silica fume, metakaolin, UFFA, or RHA, pounds per cy.

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Section 90 Training Examples

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  1. Section 90 Training Examples By Dulce Rufino Feldman Doran Glauz Tom Ruckman

  2. Equation 1 (ASR) Where: UF = Silica fume, metakaolin, UFFA, or RHA, pounds per cy. FA = Fly ash or natural pozzolan conforming to the requirements in AASHTO Designation: M 295, Class F or N with a CaO content up to 10 percent, pounds per cy. FB = Fly ash or natural pozzolan conforming to the requirements in AASHTO Designation: M 295, Class F or N with a CaO content up to 15 percent, pounds per cy. SL = GGBFS, pounds per cy. MC = Minimum amount of cementitious material specified, pounds per cy. X = 1.8 for innocuous aggregate, 3.0 for all other aggregate. Note. For precast concrete, MC=TC and X = 0 for innocuous and 3.0 for all other aggregates.

  3. Equation 2 (Cement Check) Where: MC = Minimum amount of cementitious material specified, pounds per cy. MSCM = The minimum sum of SCMs that satisfies Equation 1, pounds per cy. PC = The amount of portland cement in the mix, pounds per cy.

  4. Climate Areas http://www.dot.ca.gov/hq/esc/techpubs/manual/bridgemanuals/bridge-memo-to-designer/page/Section%208/8-2.pdf

  5. Example #1 – Bridge Deck in CA I 481 160 274 5

  6. Additional Information Submitted • Cement Source: CEMEX – Cupertino, Type II • SCM Source: Headwater Resources, Inc. Type (a) Centralia Fly Ash • Aggregate Source: Teichert – Esparto (Innocuous) • Fly Ash CaO content: 8% • Shrinkage Test Results: Passed with similar mix approved within 3 years • Climate Area: I • Concrete in Corrosive Environment: No • Concrete to be used for: Bridge Deck • Chemical Admixture: 5 oz/cwt Master Builders Pozzolith 322 N (Water Reducing Admixture)

  7. Materials Verification 1. Cement • On Pre-Qualified Product’s List (PQPL)?  Yes  No (If No, reject mix) http://www.dot.ca.gov/hq/esc/approved_products_list/pdf/Cementitious.xls 2. Blended Cement • Blended Cement proposed?  Yes No (If No, skip to #3) • All Blending Materials on PQPL?  Yes  No (If No, reject mix) 3. Supplementary Cementitious Materials • All SCM’s on PQPL?  Yes  No (If No, reject mix) • Fly Ash CaO content verified?  Yes  No (If No, reject mix) 4. Aggregate • Proposed Gradation given?  Yes  No (If No, reject mix) • Within Grading Limits?  Yes  No (If No, reject mix) • On PQPL?  Yes  No (If Yes, reduced “X” allowed in Section B) http://www.dot.ca.gov/hq/esc/approved_products_list/pdf/aggregate_for_concrete.pdf

  8. Materials Verification (Cont.) 5. Chemical Admixtures • Chemical Admixtures proposed?  Yes  No (If No, skip to #6) • On PQPL?  Yes  No (If No, reject mix) • Dosage Verified (per plans or manufacturer’s recommendations)  Yes  No http://www.dot.ca.gov/hq/esc/approved_products_list/pdf/Approved_Chem_Admix_List.doc 6. Air-entraining Admixtures • Air-Entraining Admixture proposed?  Yes  No (If No, skip to #7) • On PQPL?  Yes  No (If No, reject mix) • Dosage Verified (per plans or manufacturer’s recommendations)  Yes  No 7. Lithium Nitrate Admixtures • Lithium Nitrate Admixture proposed? Yes  No (If No, skip to #8) • On PQPL?  Yes  No (If No, reject mix) • Dosage Verified (per plans or manufacturer’s recommendations)  Yes  No

  9. Mix Design Testing 8. Shrinkage Test Compliance (for paving, bridge decks, and approach slabs) • Shrinkage Test Data Verified  Yes  N/A  No (If No, reject mix) • Verify “similar” mix design as needed per 90-1.01  Yes  N/A  No (If No, reject mix) Required shrinkage testing: • AASHTO T 160 Maximum Shrinkage of Laboratory Cast Specimens at 28 days Drying (average of 3, %) Condition Paving and approach slab concrete 0.050 Bridge deck concrete 0.045 Note. Shrinkage requirement is waived for concrete that is used for precast elements.

  10. Mix Design Calculations 9. Check Minimum Specified Amount of Cementitious Material • Include amount of blended cement per 90-2.01 • Blended cement not used. • For bridge decks: • MC=675 lbs/cy • Reduction of cementitious materials per 90-4.05: • Water reducing admixture used: 5% reduction in MC • Calculate MC: • Therefore, MC= 0.95x675 lbs/cy • Calculate TC: lbs/cy 641 MC = = + TC = lbs/cy 160 641 481 ≥ TC MC  OK  Reject

  11. Mix Design Calculations (Cont.) 10. Check Amount of Free Water (90-6.06) MC 641 328.2 328.2 274  OK  N/A  Reject

  12. Mix Design Calculations (Cont.) 11. Check Required Use of SCM Equations • Equation 1: • UF=0 • FA=160 lbs/cy • FB=0 • SL=0 • MC=641 lbs/cy • X=1.8 (innocuous aggregate) FA MC 160 641  OK  N/A  Reject

  13. Mix Design Calculations (Cont.) 11. Check Required Use of SCM Equations (Cont.) • Determine MSCM: • MC=641 lbs/cy • MSCM=is all fly ash FA MC FA 641 FA = 96.2 lbs/cy MSCM = lbs/cy 96.2

  14. Mix Design Calculations (Cont.) 11. Check Required Use of SCM Equations (Cont.) • Equation 2: • MC=641 lbs/cy • MSCM=96.2 lbs/cy • PC=481 lbs/cy 641 96.2 481  OK  N/A  Reject

  15. Mix Design Calculations (Cont.) 12. Check Strength Development Time Equation • Per SSP S8-C02 instructions, only use “Strength Development Time” section for projects in Climate Areas I and II. • Strength development time equation: • UF=0 • F=FA+FB=160 lbs/cy • SL=0 • TC=641 lbs/cy F 160  OK  N/A 641

  16. Mix Design Calculations (Cont.) 13. Check Corrosion Control Specifications • Per SSP S8-C04 instructions, use for concrete in direct contact with a corrosive environment, including those located in Climate Area III as defined in the RTL Guide.  OK  N/A  Reject 14. Check Freezing Condition Equations • Per SSP S8-C05 instructions, use when project falls within the post mile limits shown for Climate Area III as defined in the RTL Guide.  OK  N/A  Reject

  17. Questions

  18. Example #4 – Bridge Deck in CA III 337 203 135 284

  19. Freezing Equations w/ Deicing • [(25xUF) + (12xFA) + (10xFB) + (6xSL)] / TC ≥ X and; • Equation 2 does not apply. plus the additional constraints: • 4x(FA+FB) / TC ≤ 1 and; • 10xUF / TC ≤ 1 and; • 2x(UF+FA+FB+SL) / TC ≤ 1 And the allowance: • 27x(TC-MC) / MC ≤ 5

  20. Additional Information Submitted • Aggregate Source: Non-Innocuous • Fly Ash CaO content: 10% • Climate Area: III • Concrete in Corrosive Environment: No • Concrete near Deicing Chemicals: Yes • Concrete to be used for: Bridge Deck • Chemical Admixture: No Water Reducing Admixture

  21. Mix Design Calculations 1. Check Amount of Cementitious Material (Checklist #9) • Include amount of blended cement per 90-2.01 • Blended cement not used. • For bridge decks: • MC=675 lbs/cy • Reduction of cementitious materials per 90-4.05: • Water reducing admixture not used: no reduction in MC • Calculate MC: • Calculate TC: lbs/cy 675 MC = = + + TC = lbs/cy 337 135 675 203 ≥ TC MC  OK  Reject

  22. 203 135 675 Mix Design Calculations (Cont.) 2. Check Required Use of SCM Equations (Checklist #11) • “Concrete near deicing chemicals” in Section 8-2 • Equation 1: • UF=0 • FA=135 lbs/cy • FB=0 • SL=203 lbs/cy • TC=675 lbs/cy • X=3.0 (non-innocuous aggregate) SL FA TC  OK  N/A  Reject

  23. FA TC 135 675 Mix Design Calculations (Cont.) 3. Check Freezing Condition Equations (Checklist #14) • Per SSP S8-C05 instructions, use when project falls within the post mile limits shown for Climate Area III as defined in the RTL Guide. • Equation 2: • FA=135 lbs/cy • FB=0 • TC=675 lbs/cy  OK  N/A  Reject

  24. TC Mix Design Calculations (Cont.) 4. Check Freezing Condition Equations (Cont.) • Equation 3: • UF=0 • TC=675 lbs/cy  OK  N/A  Reject

  25. SL FA TC Mix Design Calculations (Cont.) 5. Check Freezing Condition Equations(Cont.) • Equation 4: • UF=0 • FA=135 lbs/cy • FB=0 • SL=203 lbs/cy • TC=675 lbs/cy 135 203 675  OK  N/A  Reject

  26. MC TC TC 675 675 675 Mix Design Calculations (Cont.) 6. Check Freezing Condition Equations(Cont.) • Equation 5: • TC=675 lbs/cy • MC=675 lbs/cy  OK  N/A  Reject

  27. Questions

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