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Book ACI Manual of Concrete Practice

Download or read book ACI Manual of Concrete Practice written by American Concrete Institute and published by . This book was released on 2005 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Use of Roller Compacted Concrete Pavement in Stafford Virginia

Download or read book Use of Roller Compacted Concrete Pavement in Stafford Virginia written by and published by . This book was released on 2015 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roller-compacted concrete (RCC) is a relatively stiffer hydraulic cement concrete mixture than regular concrete when fresh. Similar to regular concrete, RCC is a mixture of aggregate, cementitious materials, and water, but it is placed using asphalt pavers and compacted by vibratory rollers, and it hardens into concrete. RCC contains a low amount of water, exhibits no slump, and requires asphalt paving equipment for placement rather than expensive slip-form paving equipment. It does not contain reinforcement, tie-bars, or dowels. RCC can be placed and opened to traffic in a short period of time. All of these factors combined make it a relatively low-cost material for roadways compared to asphalt or conventional concrete pavements. However, RCC may lack the smoothness required for high-speed roadways and can undergo raveling and/or cracking; an asphalt overlay may remedy the smoothness and raveling issues. Although cracks might occur in the RCC and potentially reflect through the asphalt layer, such cracks should stay tight because of the low shrinkage of RCC. A composite pavement with RCC and an asphalt overlay has the potential to be a cost-effective long-lasting pavement system. The purpose of this study was to document the construction procedures and provide lessons learned for a RCC project recently completed by the Virginia Department of Transportation that covered about 134,000 ft2, equivalent to 2 lane-miles, at the Park & Ride lot in Stafford County, Virginia. About one-third of the RCC was used to rehabilitate the existing Staffordboro Boulevard (Route 684). The mixture used had 15% fly ash to provide improved durability and sustainability. Batches of the RCC mixture fluctuated in moisture content, and delays in placement sometimes occurred that also resulted in wet and dry mixtures. The compaction, surface smoothness, and road profile were affected by the fluctuations in moisture content. RCC cylinders prepared using a vibratory hammer usually exceeded compressive strengths of 1,600 psi and 4,000 psi at 12 hours and 28 days, respectively. Only a few early cracks were observed in the pavement. Opening to traffic at an early age for a section, i.e., within 5 to 6 hours of placement, did not result in any visual damage to the pavement; most sections were opened in less than 48 hours. RCC overlaid with 2 in of asphalt is performing well after two winters and 18 months of traffic for one section and after one winter and 8 months of traffic for the rest. Based on the observations in this study, for successful construction of RCC, proper compaction and mixing equipment are essential. Achieving the proper level of compaction in the field is key to attaining quality RCC. To avoid early cracks, joints need to be cut deeper than one-fourth depth of the pavement and continuous curing is essential. A continuous paving operation is needed to avoid unplanned and poor-performing cold joints. The Virginia Department of Transportation should consider RCC in future field trials, particularly for applications where fast construction of rigid (concrete) or composite pavement is needed.

Book Investigation of Roller Compacted Concrete for Use in Pavements in Virginia

Download or read book Investigation of Roller Compacted Concrete for Use in Pavements in Virginia written by M. Shabbir Hossain and published by . This book was released on 2016 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roller-compacted concrete (RCC) is a stiff mixture of aggregate, cementitious materials, and water with zero slump. RCC is consolidated or compacted in the fresh state by use of a roller with or without vibration. RCC typically is placed with asphalt paving equipment in thicknesses of 4 to 8 in for pavement application. RCC has gained the attention of the paving industry in recent years because of its history of low cost, rapid construction, and durable performance. The Virginia Transportation Research Council conducted this laboratory study to gain familiarity with RCC technology and to develop guidelines for its use in the field. RCC mixtures were successfully produced in the laboratory using locally available materials, and their properties were measured. These mixtures achieved compressive strengths around 5,000 psi in 28 days and had properties similar to those of conventional concrete in terms of compressive strength, modulus of elasticity, modulus of rupture, and splitting tensile strength. A special provision was developed and used in the two field projects. The special provision was subsequently modified based on the field experience and is provided in the Appendix. VDOT should implement the RCC specification developed in this study for regular VDOT use of RCC. Use of RCC should be considered in future field applications, particularly where fast construction of rigid (concrete) pavement is needed; an example of such an area would carry heavily loaded, slow-moving vehicles such as at intersections and access roads to truck or bus parking areas. VDOT should annually monitor the long-term performance of the two constructed RCC projects reviewed in this study over a period of at least 10 years. Evaluations should document joint efficiencies for load transfer (through testing with the falling weight deflectometer), any visual evidence of deterioration of asphalt at joints, and any other general signs of pavement distress that may occur.

Book Roller Compacted Concrete Pavements

Download or read book Roller Compacted Concrete Pavements written by Robert W. Piggott and published by . This book was released on 1999-06-01 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Proceedings of the Conference

Download or read book Proceedings of the Conference written by Australian Road Research Board and published by . This book was released on 1990 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An Introduction to Roller Compacted Concrete Pavement

Download or read book An Introduction to Roller Compacted Concrete Pavement written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2020-04-15 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil engineers and construction managers interested in roller compacted concrete pavement for streets and highways. Here is what is discussed: 1. INTRODUCTION 2. MATERIALS USED FOR RCC PAVEMENTS 3. DESIGN APPROACHES FOR RCC PAVEMENTS 4. CONSTRUCTION OF RCC PAVEMENTS 5. RCC PAVERS 6. OTHER IMPORTANT DESIGN AND CONSTRUCTION CONSIDERATIONS 7. PAVING OPERATIONS 8. CONCLUSION.

Book Application of Roller Compacted Concrete RCC Technology to Roadway Paving Construction Productivity Advancement Research CPAR Program

Download or read book Application of Roller Compacted Concrete RCC Technology to Roadway Paving Construction Productivity Advancement Research CPAR Program written by and published by . This book was released on 1994 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was to investigate the performance of a roller-compacted concrete (RCC) pavement for use as a high-speed surface. A test section consisting of a small parking lot and a two-lane roadway was constructed. During construction, three major parameters were varied: paver speed, rolling amount, and joint spacing. The paver speed was varied to determine what effect, if any, this has on average lay-down density, average final density, rideability, skid resistance, load transfer, and density profiles. The average lay-down and final densities of the RCC pavement were determined using a nuclear density device, which determined the density of various depths throughout the pavement. The load transfer was determined at transverse joints and transverse cracks by using falling weight deflectometer data. The rolling amount was varied to determine its effect on all of the same properties as paver speed except lay-down density. The joint spacing was varied to examine an optimum spacing that would not develop intermediate cracking and would provide the desired rideability and load transfer. From this project, it was determined that no adjustments in paver speed, rolling (types of patterns), or joint spacing will significantly enhance RCC pavement properties so that it may be used for high-speed applications.

Book Australian Road Research

Download or read book Australian Road Research written by and published by . This book was released on 1990 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Study on Performance of Roller Compacted Concrete Pavement in Accelerated Pavement Tests

Download or read book A Study on Performance of Roller Compacted Concrete Pavement in Accelerated Pavement Tests written by Chamroeun Chhorn and published by . This book was released on 2020 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roller-compacted concrete pavement, or RCCP, is well-known for its low cost and fast construction. Through compaction, the friction induced by aggregate interlock provides additional load carry capacity at the beginning of construction. Although its construction procedure is quite different from typical conventional concrete pavement, RCCP consists of the same basic ingredients as conventional concrete pavement. The characteristics of RCCP make it an excellent alternative for port, intermodal, street, and highway applications. Even though this pavement has been used for decades, research on and experiences in its application are still limited, particularly in Korea. In order to evaluate the performance of RCCP, two phases of an accelerated pavement test were conducted. In Phase One, the performance of RCCP at two different strengths (35.6 and 30.4 MPa) is evaluated. In Phase Two, the performance of RCCP with different thicknesses (5, 7.5, and 10 cm) is investigated. The number of load repetitions to fatigue crack occurrence in each section is compared to the estimated fatigue failure determined from the fatigue equation for RCCP. The crack development in each section is compared to the crack model for jointed plain concrete pavement. Overall, it is confirmed that RCCP has equal or better performance compared to the estimation in terms of fatigue cracking.

Book An Investigation of the Use of Roller Compacted Concrete in a Heavily trafficked High speed Application in Australia

Download or read book An Investigation of the Use of Roller Compacted Concrete in a Heavily trafficked High speed Application in Australia written by G. W. Jameson and published by . This book was released on 1989 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Guide for Roller compacted Concrete Pavements

Download or read book Guide for Roller compacted Concrete Pavements written by Dale S. Harrington and published by . This book was released on 2010 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roller-compacted concrete (RCC) is an economical, fast-construction candidate for many pavement applications. It has traditionally been used for pavements carrying heavy loads in low-speed areas because of its relatively coarse surface. However, in recent years its use has expanded into commercial areas and local streets and highways. This guide provides owner-agencies, contractors, material suppliers, and others with a thorough introduction to RCC and its many applications. Based on current research and best practices, the guide provides detailed overviews of RCC properties and materials, mixture proportioning, structural design, and production and construction considerations, plus troubleshooting guidelines and an extensive reference list for more comprehensive information.

Book Australian national bibliography

Download or read book Australian national bibliography written by and published by National Library Australia. This book was released on 1961 with total page 1818 pages. Available in PDF, EPUB and Kindle. Book excerpt: