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D Cracking Field Performance Of Portland Cement Concrete Pavements Containing Limestone In Kansas
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Book Synopsis D-cracking Field Performance of Portland Cement Concrete Pavements Containing Limestone in Kansas by : Heather A. McLeod
Download or read book D-cracking Field Performance of Portland Cement Concrete Pavements Containing Limestone in Kansas written by Heather A. McLeod and published by . This book was released on 2012 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Premature deterioration of concrete pavement due to D-Cracking has been a problem in Kansas since the 1930s. Limestone is the major source of coarse aggregate in eastern Kansas where the majority of the concrete pavements are constructed. D-Cracking field performance was investigated to determine whether aggregate freeze-thaw durability specifications implemented in the 1980s have reduced materials-related failures to an acceptable level. The results indicate that the failure rate has decreased, but not to an acceptable level. Limestone source material appears to be the dominant parameter affecting D-Cracking, while other design parameters, such as base type, joint sealant type, joint spacing, and joint orientation do not appear to significantly affect the presence of D-Cracking. Subsidiary aggregate-related reaction mechanisms were observed at locations with surface D-Cracking likely due to the increased amount of water penetration. The subsidiary reactions generally do not appear to be present at locations away from the D-Cracking. Kansas Department of Transportation policies (any actions, requirements, or decisions) that affect the risk of D-Cracking were reviewed. Recommendations included implementation of field performance criteria for aggregate material sources, improvement and unification of quarry monitoring and sampling procedures, to perform life-cycle cost analyses for various aggregate materials in concrete, and future monitoring of quarry field performance.
Book Synopsis Study of D-cracking in Portland Cement Concrete Pavements by : John E. Bukovatz
Download or read book Study of D-cracking in Portland Cement Concrete Pavements written by John E. Bukovatz and published by . This book was released on 1973 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aggregate Freeze-thaw Testing and D-cracking Field Performance by : Heather A. K. McLeod
Download or read book Aggregate Freeze-thaw Testing and D-cracking Field Performance written by Heather A. K. McLeod and published by . This book was released on 2014 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Premature deterioration of concrete pavement due to D-cracking has been a problem in Kansas since the 1930s. Kansas geology includes mineable limestone coarse aggregates with variable durability in the eastern portion of the state. Due to this variability and historically poor D-cracking field performance, the Kansas DOT initiated intensive identification and tracking of individual mined beds, as well as frequent durability testing during production in the 1980s. D-cracking field performance of concrete pavements containing limestone coarse aggregates was investigated in 2010- 2012. Results of this investigation indicate that the rate of D-cracking decreased, but the minimum rate of D-cracking presence in concrete pavements is more than 30%. In reaction to these results, KDOT implemented changes aimed at mitigating the risk of D-cracking. Implementation actions included increasing the number of freeze-thaw cycles for aggregate in concrete prisms from 300 to 660 cycles, freeze-thaw testing of all aggregate types (not just limestone) in concrete, focusing aggregate sampling at the point of concrete production, and including an "acceptable field-performance history" criterion for concrete aggregates. Ongoing research is being conducted to develop new methods to identify durable aggregates and faster testing techniques.
Book Synopsis Study of D-cracking in Portland Cement Concrete Pavement by :
Download or read book Study of D-cracking in Portland Cement Concrete Pavement written by and published by . This book was released on 1994 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis D-cracking of Concrete Pavements by : Donald R. Schwartz
Download or read book D-cracking of Concrete Pavements written by Donald R. Schwartz and published by . This book was released on 1987 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to pavement designers, materials engineers, maintenance engineers, and others concerned with design, construction, and maintenance of portland cement concrete pavements. Information is presented on the causes of and potential means for minimizing D-cracking of concrete pavements. In certain areas of the country, the coarse aggregates used in concrete pavements are susceptible to disintegration from repeated freezing and thawing. This report of the Transportation Research Board describes the mechanisms of D-cracking, summarizes known materials-acceptance and design techniques that can minimize D-cracking of new pavements, and describes rehabilitation techniques for existing pavements.
Book Synopsis Study of D-cracking in Portland Cement Concrete Pavements by : John E. Bukovatz
Download or read book Study of D-cracking in Portland Cement Concrete Pavements written by John E. Bukovatz and published by . This book was released on 1981 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of D-Cracking in Portland Cement Concrete Pavements by : John E. Bukovatz
Download or read book Study of D-Cracking in Portland Cement Concrete Pavements written by John E. Bukovatz and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability of Classed Limestone Coarse Aggregate Study, US-169, Johnson County, Kansas by : Rodney A. Montney
Download or read book Durability of Classed Limestone Coarse Aggregate Study, US-169, Johnson County, Kansas written by Rodney A. Montney and published by . This book was released on 2008 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kansas Department of Transportation began evaluating individual beds in limestone quarries for suitability for use in concrete pavement in 1980. Aggregates that were suitable for use in Portland Cement Concrete Pavement (PCCP) were designated as Durability Class I Aggregate. By 1986 several quarries had been evaluated and it was decided to construct a project with various Durability Classed Aggregates to prove the system that was used to classify the limestones. Class I Limestone has a 95% probability of providing 20 years of service life before the pavement is rehabilitated due to D-cracking. Although the aggregates that were requested for this project were not provided, this project does demonstrate the effectiveness of KDOT's specification and the rapid deterioration of pavement once D-cracking becomes evident.
Book Synopsis D-cracking in Portland Cement Concrete Pavements by : Steven R. Thompson
Download or read book D-cracking in Portland Cement Concrete Pavements written by Steven R. Thompson and published by . This book was released on 1980 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Curing Methods and Supplementary Cementitious Material Use on Freeze Thaw Durability of Concrete Containing D-cracking Aggregates by :
Download or read book Effects of Curing Methods and Supplementary Cementitious Material Use on Freeze Thaw Durability of Concrete Containing D-cracking Aggregates written by and published by . This book was released on 2013 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: For concrete pavements in Kansas, the most effective method of increasing their sustainability is to increase the service life. One of the principal mechanisms of concrete pavement deterioration in Kansas is freezing and thawing damage. Some Kansas limestone aggregates are known to be very susceptible to D-cracking and have resulted in millions of dollars in maintenance costs. The Kansas Department of Transportation (KDOT) has developed rigorous testing procedures for limestone aggregate use in concrete. In this study, the role of concrete curing, mixture proportioning, and aggregate type on the freeze thaw durability of concrete beams tested using ASTM C 666 method B were investigated. This study found that long periods of soaking in lime water produced more damage during freezing and thawing than standard KDOT curing methods. Curing for shorter period of time in a lime water bath at 100 degrees F, however, gave comparable freeze thaw results to that seen with the longer standard KDOT curing regime. Increasing the concrete's resistance to water penetration can greatly increase the freeze thaw durability of concrete containing D-cracking susceptible aggregates. It was seen that the concrete volume of permeable voids and water absorption rate correlated well with the freeze thaw durability of concrete made with a poor quality aggregates. It is recommended that KDOT continue to enforce concrete permeability and volume of permeable voids specifications to improve the service life of Kansas concrete pavements.
Book Synopsis D-cracking in Portland Cement Concrete Pavements by : Mikael P. J. Olsen
Download or read book D-cracking in Portland Cement Concrete Pavements written by Mikael P. J. Olsen and published by . This book was released on 1983 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to determine the mechanisms involved in the Iowa Pore Index Test and investigate ways to modify and supplement the testing procedure to increase its accuracy and sensitivity. In the study a modified IPIT was developed which utilized chamber pressures up to 1379 kPa (200 psi). Instead of using the volume of water entering the aggregate cores over a specified time period the degree of saturation which occurred in the aggregates at various chamber pressures was used. Relationships between degree of saturation and chamber pressure were developed and found to provide a general index of the aggregate freeze-thaw durability properties.
Book Synopsis The Effects of Combined Supplementary Cementitious Materials on Physical Properties of Kansas Concrete Pavements by : Jennifer Distlehorst
Download or read book The Effects of Combined Supplementary Cementitious Materials on Physical Properties of Kansas Concrete Pavements written by Jennifer Distlehorst and published by . This book was released on 2013 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the effects of combining varying proportions of slag cement and Class C fly ash with Type I/II cement in concrete pavement. Three different ternary cementitious material combinations containing slag cement and Class C fly ash (10% fly ash with 27% slag, 15% fly ash with 25% slag and 20% fly ash with 24% slag) were combined with limestone coarse aggregate and a moderately-reactive fine aggregate. Two concretes used only portland cement. Specimens of each concrete from the project were tested in the laboratory to evaluate physical properties. On-going pavement condition surveys will track pavement performance. All three ternary-blend concretes met specification requirements for the tests of alkali-silica reactivity. The 10% fly ash-27% slag combination was the most effective in preventing expansion. The 10% fly ash-27% slag concrete also had the highest strength and lowest permeability of the five concretes tested.
Book Synopsis Cracking, Seating and Overlaying of PCC Pavement by : John B. Wojakowski
Download or read book Cracking, Seating and Overlaying of PCC Pavement written by John B. Wojakowski and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the fall of 1984, the Kansas Department of Transportation constructed a project involving cracking, seating, and overlaying a portland cement concrete pavement. The project is located in Wyandotte County on K-7 highway, north of K-32. This project is on the west side of the Kansas City metropolitan area. Eight experimental sections and one control section were stipulated for this project. One section of regular construction was selected for the control section. Four of the eight test sections were designated to be cracked at 0.9 m (3 ft) centers, and the other four were cracked at 1.5 m (5 ft) centers. One half of each spacing pattern was saw cut at the quarter points of the 18.7 m (61.5 ft) panels [approximately 4.6 m (15 ft) spacing, minimum 127 mm (5 in.) deep, maximum 13 mm (0.5 in.) wide] prior to cracking. Four sections had minimal joint repair; four had normal joint patching. There have been no easy determinants as to why the transverse cracking is low in some sections, and high in others. In some years it appears to be one factor, but the next year the factor has appeared to change. After 10 years there is no difference attributable to the cracking spacing, probably because both spacings are too large to adequately distribute the thermal movements. Slightly better performance was noted in sections that have minimal joint patching. More recent projects have used rubblizing as a rehabilitation technique. These have not shown significantly better performance than the cracking method. More investigation needs to be done to quantify the effect of various components that are used in this technique.
Book Synopsis Portland Cement Concrete Pavements by : Peter J. Nussbaum
Download or read book Portland Cement Concrete Pavements written by Peter J. Nussbaum and published by . This book was released on 1977 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: In conducting this investigation, detailed surveys on 85 pavement projects in 7 States were made. These pavements were generally under 15 years old, and reinforced and continuously reinforced pavements. The results of this investigation are contained in the report as prepared by PCA. Some of the aspects of Portland Cement Concrete pavements covered include: 1) Categories and characteristics of PCC pavements; 2) Pavement problems, their causes and required maintenance; 3) A pavement performance and condition survey; 4) A charted summary, design, and construction practices of the states (available separately on request); 5) Construction and maintenance costs, and 6) Design and construction recommendations.
Author :Portland Cement Association. Research and Development Laboratories. Cement and Concrete Research Institute Publisher : ISBN 13 : Total Pages :182 pages Book Rating :4.:/5 (132 download)
Book Synopsis Final Report on D-cracking of Concrete Pavements in Ohio by : Portland Cement Association. Research and Development Laboratories. Cement and Concrete Research Institute
Download or read book Final Report on D-cracking of Concrete Pavements in Ohio written by Portland Cement Association. Research and Development Laboratories. Cement and Concrete Research Institute and published by . This book was released on 1974 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Report written by and published by . This book was released on 1980 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling of Portland Cement Concrete Pavement Longitudinal Joint Distress by : Yacoub M. Najjar
Download or read book Modeling of Portland Cement Concrete Pavement Longitudinal Joint Distress written by Yacoub M. Najjar and published by . This book was released on 1996 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Longitudinal joints of concrete pavements constitute essential elements in the overall functionality and performance of the pavement system. The noticeable deterioration of these joints on some of Kansas highways lead to performing a preliminary study in order to determine the severity of the problem and analyze the design and construction issues that might have contributed to the observed damage. Data was collected from 31 sections of interstate highway in the Kansas City, Kansas metropolitan area. Parameters such as the age of the pavement and sealant, accumulated volumes of total and heavy traffic, type of joint, slab length, slab thickness, concrete strength, steel reinforcement, etc. were analyzed in relation to the observed spalling of the longitudinal joints. The variation of these parameters, with the spalling measures presented in this report, was studied.
