SECTION_32_12_43_Porous_Paving.docx
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SECTION 32 12 43 POROUS PAVING
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SECTION 32 12 43
SECTION 32 12 43
POROUS PAVING
| PART 1 | GENERAL |
| 1.1 | SUMMARY |
| A. | Section includes: |
| 1. | Porous paving systems. |
| a. | Concrete. |
| b. | Asphalt. |
| 2. | Unit paver systems. |
| 1.2 | REFERENCES |
| A. | AASHTO M288: Standard Specification for Geotextile Specification for Highway Applications |
| B. | ASTM C 33: Standard Specification for Concrete Aggregates |
| C. | ASTM C 67: Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile |
| D. | ASTM C 936: Standard Specification for Solid Concrete Interlocking Paving Units |
| E. | ASTM C1319: Standard Specification for Concrete Grid Paving Units |
| F. | ASTM C1688: Standard Test Method for Density and Void Content of Freshly Mixed Pervious Concrete |
| G. | ASTM C1701: Standard Test Method for Infiltration Rate of In Place Pervious Concrete |
| H. | ASTM D 698: Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12 400 ft-lbf/ft (600 kN-m/m)) |
| I. | ASTM D 1557: Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft (2,700 kN-m/m)) |
| 1.3 | SUBMITTALS |
| A. | Product data. Unless otherwise indicated, submit the following for each type of product provided under work of this Section: |
| 1. | Recycled Content: |
| a. | Indicate recycled content; indicate percentage of pre-consumer and postconsumer recycled content per unit of product. |
| 2. | Local/Regional Materials: |
| a. | Sourcing location(s): Indicate location of extraction, harvesting, and recovery; indicate distance between extraction, harvesting, and recovery and the project site. |
| b. | Manufacturing location(s): Indicate location of manufacturing facility; indicate distance between manufacturing facility and the project site. |
| c. | Product Value: Indicate dollar value of product containing local/regional materials; include materials cost only. |
| d. | Product Component(s) Value: Where product components are sourced or manufactured in separate locations, provide location information for each component. Indicate the percentage by weight of each component per unit of product. |
| 3. | Albedo data: Provide information identifying the Solar Reflectance Index SRI of the following products provided under work of this Section: |
| a. | Pavement. |
| B. | Concrete Paving: In addition to the above, provide submittals as required for Concrete Paving, Section 32 13 13. |
| C. | Asphalt Paving: In addition to the above, provide submittals as required for Asphalt Paving, Sections 32 12 03 and 32 12 16. |
| 1.4 | QUALITY ASSURANCE |
| A. | Installer Certification: |
| 1. | For porous paving installations, provide Pervious Concrete Contractor Certification from the National Ready Mixed Concrete Association. |
| B. | Field-Constructed Mockup: Install minimum 225 square feet to demonstrate typical joints, surface finish, texture, color, permeability, and standard of workmanship. |
| 1. | When COR determines that mockup does not meet requirements, demolish and remove it from the site and install another until the mockup is accepted. |
| 2. | Keep accepted mockup undisturbed during construction as a standard for judging completed paving. |
| 3. | Accepted mockup may be incorporated into final work when approved by COR. |
| 1.5 | ACCEPTANCE |
| A. | Concrete: For lot size, testing, and Pay Factors see Section 32 13 13. |
| B. | Asphalt: For lot size, testing, and Pay Factors see Sections 32 12 03 and 32 12 16. |
| PART 2 | PRODUCTS |
| 2.1 | POROUS CONCRETE PAVING |
| A. | Installed system: |
| 1. | Albedo: Minimum Solar Reflectance Index (SRI) of 29. |
| 2. | Permeability: Minimum permeability rate 60 percent or not less than an infiltration rate of 1.1 inch/hr. for a 20-year design life. Determine the field water infiltration rate of in place pervious concrete in accordance with ASTM C1701. |
| 3. | Density and void content: Detremine the density and void content of freshly mixed pervious concrete in accordance with ASTM C1688. Verify that mixture proportions are as designed. |
| 4. | Compressive Strength: Minimum Class 3000, Section 03 30 04. |
| 5. | Slump: Per accepted mix design. |
| 2.2 | POROUS ASPHALT PAVING |
| A. | Asphalt Cement: |
| 1. | Recycled Content: Minimum 5 percent post-consumer recycled content, or minimum 20 percent pre-consumer recycled content at Contractor’s option. |
| C. | Installed system: |
| 1. | Permeability: Minimum permeability rate 60 percent. |
| 2.3 | UNIT PAVER SYSTEMS |
| A. | Concrete paver systems: |
| 1. | Concrete grid paver units: Comply with ASTM C1319. |
| 2. | Interlocking concrete paver units: Comply with ASTM C 936. |
| 3. | Average compressive strength of 8,000 psi with no individual unit under 7,200 psi. |
| 4. | Maximum 1 percent loss in dry mass per unit in minimum 50 freeze-thaw cycles when tested according to ASTM C 67. |
| B. | Plastic paver forms: |
| 1. | Recycled Content: Minimum 5 percent post-consumer recycled content, or minimum 20 percent pre-consumer recycled content at contractor’s option. |
| C. | Installed system: |
| 1. | Permeability: Minimum permeability rate 60 percent or not less than an infiltration rate of 1.1 inch/hr. for a 20-year design life. |
| 2.5 | ACCESSORIES |
| A. | Paver Bedding And Joint Sand: As recommended by paver manufacturer and as follows: |
| 1. | Clean, non-plastic, free from deleterious or foreign matter, natural or manufactured from crushed rock. |
| 2. | Sieve according to ASTM C 33, No. 8 stone; bedding and joint aggregate conforming to gradation in Table 1. Joint material may also conform to No. 89 crushed stone or finer material at contractor’s option. |
Table 1: Bedding and Joint Aggregate Gradation
| Sieve Size |
| Percent Passing, by Weight |
| 1/2 in. |
| 100% |
| 3/8 in. |
| 85% to 100% |
| No. 4 |
| 10% to 30% |
| No. 8 |
| 0% to 10% |
| No. 16 |
| 0% to 5% |
| 3. | Screenings and stone dust are not permitted. |
| 4. | Sand having material passing the No. 200 (0.075 mm) sieve is not permitted. |
| B. | Reservoir stones: ASTM C 33 No. 57 crushed concrete or other recycled materials conforming to gradation in Table 2. |
Table 2: Reservoir Stone Gradation
| Sieve Size |
| Percent Passing, by Weight |
| 1-1/2 in. |
| 100% |
| 1 in. |
| 95% to 100% |
| 1/2 in. |
| 25% to 60% |
| No. 4 |
| 0% to 10% |
| No. 8 |
| 0% to 5% |
| 1. | Recycled Content: Minimum 5 percent post-consumer recycled content, or minimum 20 percent pre-consumer recycled content at contractor’s option. |
| C. | Geotextile fabric: Comply with AASHTO M288 based on application and installation conditions. Verify compatibility between geotextile and adjacent soils for filtration, clogging and permeability. |
| D. | Edge restraints: Concrete. |
| PART 3 | EXECUTION |
| 3.1 | PREPARATION |
| A. | Verify compacted subgrade, granular base or stabilized soil is acceptable and ready to support paving and imposed loads. |
| 1. | Verify subsoils have a permeability between 0.5 and 3.0 inches per hour. |
| 2. | Compact to minimum 95 percent Standard Proctor Density per ASTM D 698 for pedestrian areas. |
| 3. | Compact to 95 percent Modified Proctor Density per ASTM D 1557 for areas subject to heavy vehicular traffic. |
| 4. | Verify that geotextiles, if applicable, have been placed in accordance to specifications and drawings. |
| B. | Reservoir stones: Verify gradients and elevations of base are correct. |
| 1. | Install so that the bottom of the stone reservoir is flat and graded such that infiltrated runoff will be able to infiltrate through the entire surface. |
| C. | Install edge restraints per the drawings and manufacturer's recommendations. |
| 3.2 | INSTALLATION |
| A. | Install pervious paving system(s) in accordance with manufacturer’s recommendations and as indicated. |
| B. | Final Surface: |
| 1. | Tolerances: Maximum variation 3/8 inch under a 10 ft long straight edge. |
| 2. | Install surface elevation of the paving system 1/8 to 1/4 inch above adjacent drainage inlets, concrete collars or channels. |
END OF SECTION
POROUS PAVING Page 1
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