Ariston Pacific, Inc. 5/9/2016 - Laserfiche WebLink

I 1 I 2 3. Freeze-thaw durability shall be provided by one of the following methods: 3 4 a. The concrete shall maintain an air content between 4.5 and 7.5 percent. I 5 6 b. The concrete shall maintain a minimum air content that achieves a 7 durability factor of 90 percent, minimum, after 300 cycles in accordance 8 with AASHTO T 161, Procedure A. This air content shall not be less than 9 3.0 percent. Test samples shall be obtained from concrete batches of a 10 minimum of 3.0 cubic yards. 11 I12 13 4. Scaling shall have a visual rating less than or equal to 2 after 50 cycles in accordance with ASTM C 672. 14 I 15 5. Shrinkage at 28 days shall be less than 0.032 percent in accordance with 16 AASHTO T 160. 17 I 18 6. Modulus of elasticity shall be measured in accordance with ASTM C 469. 19 20 7. Density shall be measured in accordance with ASTM C 138. 21 I22 The Contractor shall submit the mix design in accordance with Section 6-02.3(2)A. The 23 submittal shall include test reports for all tests listed above that follow the reporting 24 requirements of the AASHTO/ASTM procedures. Samples for testing may be obtained 1 25 from either laboratory or concrete plant batches. If concrete plant batches are used, the 26 minimum batch size shall be 3.0 cubic yards. The Contractor shall submit the mix 27 design to the Engineer at least 30 calendar days prior to the placement of concrete in I 28 29 the bridge deck. 30 6-02.3(2)A2 Contractor Mix Design for Self-Consolidating Concrete I 31 Self-consolidating concrete (SCC) is concrete that is able to flow under its own weight 32 and completely fill the formwork without the need for vibration while maintaining 33 homogeneity, even in the presence of dense reinforcement. SCC shall be capable of I 34 being pumped, and of flowing through the steel reinforcing bar cage without segregation 35 or buildup of differential head inside or outside of the steel reinforcing bar cage. 36 37 Type Ill cement may be used in SCC. I 38 39 SCC may be used for the following concrete Structure elements: 40 I 41 1. All cast-in-place concrete elements except bridge decks, bridge approach 42 slabs, and any cast-in-place concrete element excluded by the Special 43 Provisions. I 44 45 2. Prestressed concrete girders in accordance with Sections 6-02.3(25). 46 I 47 3. All precast concrete elements identified in Section 6-02.3(27)A. 48 49 The mix design submittal shall include items specified in Section 6-02.3(2)A and results 50 of the following tests conducted on concrete that has slump flow within the slump flow 51 range defined below: 52 I I AMENDMENTS TO THE 2014 STANDARD SPECIFICATIONS BOOK Revised: 8/3/15