CITY OF LOS ANGELES

INTERDEPARTMENTAL CORRESPONDENCE

Date: February 1,2017

The Honorable Council Member Paul Krekorian, Chair Budget and Finance Committee

To:

The Honorable Council Member Joe Buscaino, Chair Public Works and Gang Reduction Committee

EngineerGary Lee Moore, City Bureau of Engineering

From:

Subject: SIDEWALK REPAIR PROGRAMREPORT ON USE OF ALTERNATIVE MATERIALSCOUNCIL FILE 14-0163-S3

RECOMMENDATION:

AUTHORIZE the establishment of a Sidewalk Repair Program Alternative Materials Pilot Testing Program (Pilot Program) to be implemented by the Bureau of Engineering (BOE). The BOE will install sidewalks constructed of an alternative material at a City facility, which will be inspected, monitored, and assessed on an annual basis. Each year, a report will be submitted to the City Council detailing the performance of the alternative materials. After the testing period, the alternative materials that perform adequately will be approved for use for sidewalk repair. Funding in the amount of $1.5M from the Fiscal Year 2017-18 Sidewalk Repair Program budget will be used to implement the Pilot Program.

DISCUSSION

This report is in response to Council’s request from BOE to report back on the following items in Council File 14-0163-S3:

Item No. 25 - INSTRUCT the BOE to issue a formal Request for Information and develop a list of non-standard sustainable sidewalk designs, materials, and manufacturers.

Item No. 28 - INSTRUCT the BOE and BSS to develop and implement a program to use alternative sidewalk materials at, and adjacent to, City facilities, including to determine their purchase, installation and lifecycle costs; issues regarding application and maintenance, and durability.

Request for Information

Report on Use of Alternative MaterialsCouncil File 14-0163-S3February 1,2017Page 2

Initial research was conducted by staff to identify vendors and manufacturers of alternative materials for sidewalk construction. The compiled information included contact information for vendors, manufacturers, government agencies, trade associations, and academic institutions. Staff:

Developed a Request for Information (RFI)Issued the RFI to 38 recipients on September 21,2016Received information from 23 respondents, and developed a list of respondents (Attachment A)

BOE Staff grouped the alternative materials in 6 different categories:

Plastic Sidewalk PanelsPanels are made from post-consumer plastics.Water can permeate through the panels’ joints.No special maintenance is required with this product.

1.

2. Rubber Materials and PaversThere are a variety of sidewalk products made from recycled rubber tires:

Pour-in-Place Rubber Materials

Material is made from recycled tires and a binding agent. It is mixed on site and poured in place.Material is porous, allowing water and air to permeate.Maintenance requirement is re-application of the top protective layer when necessary.

Rubber and Aggregate Pour-in-Place Materials

Material is made from recycled tires, crushed rock aggregate, and a binding agent. It is mixed on site and poured in place.Material is porous, allowing water and air to permeate.No special maintenance is required with this product.

Rubber Pre-Fabricated Pavers

Pavers are made from recycled tires, and are non-porous. No special maintenance is required with this product.

Cementitious Pavers3.Pavers include:

2

Report on Use of Alternative MaterialsCouncil File 14-0163-S3February 1,2017Page 3

Porous Pavers

Pavers are pre-fabricated from concrete, crushed rock and aggregate. Material is porous, allowing water and air to permeate.Some brands contain recycled materials.Periodic vacuum cleaning is required to maintain porosity.

Permeable Interlocking Concrete Pavers (PICPs)

Pavers are made from concrete with some recycled content.Interlocking system allows water to permeate through the joints.Periodic vacuum cleaning is required to maintain the permeability, and annual pressure washing is recommended.

Energy Generating PanelsStaff research led to two general types:

4.

Panels Capturing Kinetic Energy

Panels are designed to capture kinetic energy generated by footsteps converted to electricity.Installations to date have been completed primarily in Europe.System requires electrical and electronic infrastructure.Vendor will monitor the system remotely, and provide regular maintenance diagnostics.

Photovoltaic Tiles

System utilizes photovoltaic technology in a pavement assembly. Installations to date have been completed primarily in Europe.System requires electrical and electronic infrastructure.Preventative maintenance includes checking inverters routinely and cleaning 2-3 times a year.

Pervious ConcreteMost common mix for pervious concrete contains Portland cement, sand, water and coarse aggregate, which creates voids that allow water and air to permeate.Periodic vacuum cleaning is required to maintain the porosity.

5.

Alternatives to Portland Cement Concrete (PCC)Supplementary Cementitious Materials (SCMs)

SCMs use replacement materials such as fly ash, which reduce the amount of Portland cement in PCC mix thus reducing CO2 emissions (a by-product of Portland cement production).

6.

3

Report on Use of Alternative MaterialsCouncil File 14-0163-S3February 1,2017Page 4

No special maintenance is required with this product.

Alternative Cementitious Materials (ACMs) - Alternative Concrete Technologies

ACM concrete products have been developed with the goal of reducing CO2

emissions, and in some cases reduced water usage.ACMs are available in the form of pavers and in various cementitious mix formulations.No special maintenance is required with this product.

Pilot Program

BOE is recommending the establishment of a Pilot Program at, or adjacent to City facilities as described below. The Pilot Program’s goal is determining alternative sidewalk materials’ purchase, installation and lifecycle costs, maintenance requirements, and durability.

Materials Recommended for the Pilot Program

The alternative materials recommended for the Pilot Program are based on the information received as a result of the RFI issued on September 21,2016.

Staff recommends alternative materials referenced in Categories 1, 2, 3, 5 and 6 above for inclusion in the Pilot Program at this time. Recommended brands/products of alternative materials are listed in Attachment A.

Pervious concrete (Category 5 above) is an alternative material that is currently being tested by the City. The test sites will be monitored and assessed by staff, and performance results will be reported to Council.

Materials Not Recommended for the Pilot Program

Energy Generating Panels (Category 4 above) are not recommended for the Pilot Program at this time. Further investigation on the technology is still required. Vendors/manufacturers are based in and have completed installations primarily in Europe. Marketing representation is very limited in the United States. Permanent exterior installations are rare. Concrete pavement is required as underlayment for the materials. Electrical and electronic infrastructure (such as generators, inverters, and blue tooth chip technology) is required, and the power output is limited.

Responses were received from a group of vendors that provide services such as grinding existing concrete, or manufacture coatings, toppings, and pavement preservation materials for asphalt and concrete. The services and products in this group offer short term solutions to sidewalk repair. Staff does not recommend including products and services from this group, identified at the bottom of the table in Attachment A, in the Pilot Program.

4

Report on Use of Alternative MaterialsCouncil File 14-0163-S3February 1,2017Page 5

Pilot Site Selection Guidelines

The recommended alternative materials will be installed at or adjacent to a City facility. Proposed site options are based on the following guidelines. Site:

Has severe existing conditions requiring repairs Is a high pedestrian traffic area Is located adjacent to trees

Pilot Program Timeline

The Pilot Program will be implemented in Fiscal Year 2017-18. Staff will inspect, assess, and document performance of the materials at each site, and will report back to Council with findings on a yearly basis.

Pilot Program Fiscal Impact

It is recommended that funding in the amount of $1.5M be made available in the Fiscal Year 2017-18 Sidewalk Repair Program Budget for implementation of the Pilot Program.

If you have any questions, please contact Deputy City Engineer, Julie Sauter, at 213 847­2230.

Attachments: Attachment A - Alternative Materials - List of RFI Respondents

Ted Bardacke, Mayor’s OfficeJennifer Pope, Mayor’s OfficeMatthew Hale, Council District 2Dennis Gleason, Council District 15David Hirano, Office of the City Administrative OfficerPaul Smith, Office of the Chief Legislative AnalystTed Allen, Bureau of Engineering

cc:

5

Attachment A

Alternative Materials - List of RFI RespondentsUses

Recycled

Materials

Recommended

for Pilot

Program

Manufacturer

WarrantyPermeable

Respondents DescriptionCategory 1 - Plastic Sidewalk Panels

|Plastic Panels, Permeable Through JointsTERRECON, Inc. -TERREWALKS Yes Yes 25 Years Yes1Category 2 - Rubber Materials and Pavers

Yes Yes 10 Years Yes2 Rubberway, Evolution Sidewalk Pour in Place Rubber & AggregateChampagne Edition, Inc. - eco - flex Yes No 3 Years Yes3 Rubber Pavers

4 Yes Yes 2 Years YesPorous Pave, Inc. - Porous Pave Pour in Place Rubber and AggregateYes Yes 3 Years Yes5 K. B. Industries, Inc., FLEXI-Pave Pour in Place Rubber and AggregateYes Yes 5 Years YesTERRECON, Inc. - Rubbersidewalks Rubber Pavers, Permeable Through Joints

Category 3 - Cementitious PaversNo Yes 5 Years Yes6 Xeripave Cementitious Pavers

7 Yes Yes 5 Years YesPURUS-ECORASTER North America - Bioxx Cementitious and Rubber Pavers with Permeable Plastic Grid FramesYes Yes 1 Year Standard Yes8 Angeius Block Co., Inc., Permeable Holland Cementitious Pavers, Permeable Through JointsYes Yes 10 Years Yes9 Cementitious Paver, Approved by City for Alleyways and ParkwaysPacific Interlock Pavingstone - Hydro-Flo, Estate Series, Holland

Category 4 - Energy Generating Panels10 Yes No 1 Year Standard NoPAVEGEN Electricity Generated by Kinetic Energy from Footsteps

No No 10 Years No11 Onyx Solar Photovoltaic Panel SystemCT) Category 5 - Pervious Concrete

No RespondentsCategory 6 - Alternative Cementitious MaterialsABT, Inc. - CeraCrete-5000 Alternative Cementitious Material - Reduces CO2 Emissions No No 1 Year Standard Yes12

13 Yes No 1 Year Standard YesCTS Cement - Rapid Set Alternative Cementitious Material - Reduces CO2 Emissions

14 Yes No 1 Year Standard YesSoiidia Technologies - CO2 Cured Concrete Alternative Cementitious Material - Reduces CO2 Emissions and Water Use15 Yes No 1 Year Standard YesHoliday Rock - Supplementary Cementitious Material Mix Supplementary Cementitious Material - Reduces CO2 Emissions

OtherNo No 1 Year Standard No16 Shell Oil Products - Mexphalte C Coating for Use on Asphalt PavementsNo No 5 Years No17 ePAVE, LLC - Polymer Enhanced Composite Coating for Use on Asphalt and Concrete Pavements

Not Applicable Not Applicable Not Applicable No18 American Grinding Company, LLC Grinding Service - Not a MaterialNo No 3 Years No19 Jalux Americas - AQUAPATCH Binder for Patching Asphalt and Concrete

Government and Research OrganizationsFHWA (Federal Highway Administration) , DOT (United States Department of Transportation)

20 Not Applicable Not Applicable Not Applicable Not ApplicableAssisting with Research and Information

21 UCLA (University of California, Los Angeles) Not Applicable Not Applicable Not Applicable Not ApplicableAssisting with Research and Peer ReviewEPA (Environmental Protection Agency) Assisting with Research and Information Not Applicable Not Applicable Not Applicable Not Applicable22City of Santa Monica Not Applicable Not Applicable Not Applicable Not Applicable23 Provided Lessons Learned

Report on U

se of Alternative Materials

Council File 14-0163-S3

February 1,2017 Page 6