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From page 6... ... 6 Over the past few years, several transportation agencies have focused their efforts on accelerating construction and reducing user delay/vehicle operation times, and thereby improving overall project cost-effectiveness and reducing disruptions. To achieve this goal, agencies have used specific construction practices, manufacturing processes and technologies, design techniques, materials and construction equipment, project financing, contracting practices, and performance measures. Read the entire page →
From page 7... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 7 Table 1. Overview of different work zone impact considerations (FHWA 2006) Read the entire page →
From page 8... ... 8 Construction and Rehabilitation of Concrete Pavements Under Traffic Many software tools are available to assess the impacts of roadway construction work zones on traffic. Figure 1 shows some of these tools, ranging from simple to complex. Read the entire page →
From page 9... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 9 under traffic and procedures for accelerating construction of concrete overlays. They assert that "managing work zones for concrete overlay projects is no more challenging than for any other paving project under traffic, as long as certain straightforward practices are followed" (Harrington and Fick 2014) Read the entire page →
From page 10... ... 10 Construction and Rehabilitation of Concrete Pavements Under Traffic Areas of Consideration Items to Consider Traffic management Capacity analyses (e.g., lanes required, length of queues anticipated) Time restrictions (e.g., peak hours, seasonal peaks) Read the entire page →
From page 11... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 11 MOT Strategy and When to Use Advantages (+) and Disadvantages (-) Read the entire page →
From page 12... ... 12 Construction and Rehabilitation of Concrete Pavements Under Traffic MOT Strategy and When to Use Advantages (+) and Disadvantages (-) Read the entire page →
From page 13... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 13 frequency and duration, where possible, volume of traffic through the work zones, to increase worker and work zone safety to the greatest possible extent. An emergency response plan that includes protocols for emergency medical services should be established to deal with work zone incidents. Read the entire page →
From page 14... ... 14 Construction and Rehabilitation of Concrete Pavements Under Traffic occupied by construction and public traffic during various stages of the construction (Harrington and Fick 2014) Read the entire page →
From page 15... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 15 Strategies for Project Planning and Construction Staging Strategies for planning and staging while constructing and rehabilitating concrete pavements under traffic are discussed in the following [Cable (2012) , Simon et al. Read the entire page →
From page 16... ... 16 Construction and Rehabilitation of Concrete Pavements Under Traffic Materials and Design The materials and design used on a project affect project schedule, construction time, and the number of construction/haul vehicles, all of which can have an impact on traffic. In the 1990s, there was an emphasis on fast-track paving, where high-early-strength (HES) Read the entire page →
From page 17... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 17 The accelerated strength gain of HES is provided by a number of techniques, including the use of chemical admixtures, increasing the amount of Portland cement in the mixture, use of cements with finer cement grains, use of cements with higher amounts of tricalcium silicate, use of proprietary cementitious products, use of calcium fluoroaluminate cement, and use of calcium sulfoaluminate cement. Compared to conventional concrete mixtures, HES products and processes can be significantly less economical and can also have uncertain long-term performance. Read the entire page →
From page 18... ... 18 Construction and Rehabilitation of Concrete Pavements Under Traffic and, correspondingly, more trucks delivering concrete to the job site, which can potentially slow down paving operations. Pavements with substantial rutting may require additional, unplanned concrete quantities if not addressed. Read the entire page →
From page 19... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 19 Equipment and Operations In recent years, there have been many improvements in paving equipment and placement techniques that help with various aspects of construction and rehabilitation of concrete pavements under traffic, including accelerating construction, reducing clearance requirements, and allowing earlier opening to traffic. As in the case of paving equipment, paving operations can also affect the extent and duration of traffic impacts, which affect decisions on closures, detours, two-lane versus one-lane paving, haul roads, and so forth. Read the entire page →
From page 20... ... 20 Construction and Rehabilitation of Concrete Pavements Under Traffic stations, and laser positioning to electronically track the equipment and control and guide the horizontal and vertical operations of the equipment. Stringless systems increase productivity and reduce costs through reducing the need for surveys and eliminating the labor involved in setting, maintaining, and removing the stringline. Read the entire page →
From page 21... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 21 • For work that may affect schedule and traffic, consider permitting use of a moving traffic control operation of a given distance. To reduce slowdowns at bridge approaches and transitions, the layout of the new bridge approach and transition concrete should be done in conjunction with that of the pavement gradeline. Read the entire page →
From page 22... ... 22 Construction and Rehabilitation of Concrete Pavements Under Traffic Strategies for Project Management, Delivery, Procurement, and Payment The following list, summarized from Simon et al. Read the entire page →
From page 23... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 23 • Agencies can consider developing a database of activity productivity rates of different construction methods and lessons learned on ways to expedite schedules. This can be used to decide which methods to use on future projects and to provide schedules with more realistic targets. Read the entire page →
From page 24... ... 24 Construction and Rehabilitation of Concrete Pavements Under Traffic local residents and businesses, and other affected parties and agencies is paramount to reducing and mitigating their effects. A well-planned and well-executed public outreach program can be an effective tool to help reduce the extent and severity of traffic impacts. Read the entire page →
From page 25... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 25 • A web-based team-collaboration system for communications through all phases of the project should be used. Web-based systems eliminate any apparent boundary between a project participant's computer and the project's folders and files. Read the entire page →
From page 26... ... 26 Construction and Rehabilitation of Concrete Pavements Under Traffic Factors to Consider Note Drainage If drainage improvements affect the construction schedule, they should be conducted under a separate project and completed during off-peak hours or in coordination with other closures. Utilities As with drainage improvements, all utility work should be completed prior to the overlay in order to reduce interference or early-age damage. Read the entire page →
From page 27... ... Considerations and Strategies for Constructing and Rehabilitating Concrete Pavements Under Traffic 27 Factors to Consider Note Events Work zone management plans should take into consideration special events. Coordination with appropriate authorities and stakeholders may be necessary to ensure the least amount of disruption. Read the entire page →
From page 28... ... 28 Construction and Rehabilitation of Concrete Pavements Under Traffic Factors to Consider Note Schedule A realistic project schedule should be established. Proper equipment and staffing, mixtures, construction methods, curing, and sawing are all considerations when establishing the schedule. Read the entire page →

From page 6...

... 6 Over the past few years, several transportation agencies have focused their efforts on accelerating construction and reducing user delay/vehicle operation times, and thereby improving overall project cost-effectiveness and reducing disruptions. To achieve this goal, agencies have used specific construction practices, manufacturing processes and technologies, design techniques, materials and construction equipment, project financing, contracting practices, and performance measures.