scholarly journals NON-DESTRUCTIVE EVALUATION OF IN‐PLACE REHABILITATED CONCRETE PAVEMENTS

2010 ◽  
Vol 16 (4) ◽  
pp. 552-560 ◽  
Author(s):  
Kasthurirangan Gopalakrishnan ◽  
Sunghwan Kim ◽  
Halil Ceylan
Keyword(s):  
Field Experiment ◽  
Asphalt Concrete ◽  
Field Evaluation ◽  
Structural Condition ◽  
Concrete Pavements ◽  
Test Results ◽  
Department Of Transportation ◽  
Portland Cement Concrete ◽  
Reflection Cracking ◽  
Non Destructive

Several in‐place rehabilitation techniques have been used before placing an Asphalt Concrete (AC) overlay on Portland Cement Concrete (PCC) pavements in attempts to minimize reflection cracking. Among these techniques, “rubblization” of PCC has been recognized to be the most utilized procedure for the mitigation of reflection cracking in US. This paper presents the practices on the use of rubblization in US and discusses the performance of this technique based on field evaluation. The specifications for the rubblization procedure used by state Department of Transportation (DOT) in US were reviewed. To evaluate the performance of rubblization technique, the structural and the surface conditions of AC overlaid pavements with rubblized PCC layer are compared to those with virgin PCC layer. A series of field experiment tests were carried out on six representative AC overlaid pavements with both rubblized PCC and virgin PCC in Iowa during 2007. The field experiment tests include the Nondestructive (NDT) and destructive tests, and the distress survey. Deflection Basin Parameters (DBPs) were derived from NDT test results to characterize the structural condition of pavements. The results indicate that the rubblized PCC layer has strength comparable to that of virgin PCC layer and has better performance under that structural condition. Santrauka Siekiant nustatyti asfaltbetonio (AC) sluoksnio veiksminguma, mažinant plyšiu ir itrūkiu atsiradima portlandcemenčio betono (NKK) dangose, buvo taikyti keli kelio dangu rekonstrukcijos metodai. Vertinant ivairius plyšiu susidaryma mažinančius keliu rekonstrukcijos metodus, geriausiu buvo pripažintas regeneracijos metodas (PCC rubblization), taikomas JAV. Nagrinejama mineto regeneracijos metodo taikymo patirtis JAV ir analizuojamos jo taikymo galimybes bei veiksmingumas. Ši keliu atnaujinimo metoda taiko JAV Transporto departamentas (DOT). Siekiant ivertinti nagrinejamo regeneracijos metodo veiksminguma eksploatacinemis salygomis, AC buvo padengtas pagal naujaji metoda paruoštu PCC sluoksniu, ir gauti tyrimu rezultatai palyginti su standartiškai paruošto PCC sluoksnio rezultatais. Natūriniai eksperimentiniai bandymai buvo atlikti, taikant neardomuosius (NDT) ir ardomuosius tyrimu metodus. Ilinkiai (DBPs) buvo nustatyti NDT bandymo metodais, charakterizuojančiais konstrukcines dangu salygas. Darbo rezultatai parode, kad pagal naujaji metoda paruoštas PPC sluoksnis igijo panašu stipri kaip ir PCC sluoksnis su standartine danga, tačiau regeneruota PPC danga igijo geresniu eksploataciniu charakteristiku.

Implementation Feasibility of Asphalt Concrete–Overlaid Portland Cement Concrete Pavement Rehabilitation Guidelines

1997 ◽  
Vol 1568 (1) ◽  
pp. 155-164
Author(s):  
Kathleen T. Hall ◽  
Amy Schutzbach
Keyword(s):  
Portland Cement ◽  
Asphalt Concrete ◽  
Concrete Pavements ◽  
Remaining Life ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Pavement Rehabilitation ◽  
Cement Concrete Pavement ◽  
Rehabilitation Strategy ◽  
Selection Of

Illinois Highway Research Study IHR-532 was conducted to develop project-level guidelines for evaluation, rehabilitation selection, and rehabilitation design for existing asphalt concrete–overlaid portland cement concrete (AC/PCC) pavements in Illinois. Use of these guidelines depends on data that are not normally available for network-level analysis. A study was conducted to assess the feasibility of implementing these guidelines in network-level decision making and to assess the effects that implementing these guidelines for selection of rehabilitation methods for existing asphalt-overlaid concrete pavements would have on the overall rehabilitation budget requirements for a district network of Interstate pavements, the overall network condition, and pavement network remaining life. These objectives were met by comparing the IHR-532 rehabilitation strategy (which identifies one or more rehabilitation options) with the Illinois Department of Transportation’s current rehabilitation policy, which is an AC overlay thickness of 83 mm (3.25 in.). This feasibility analysis indicated that the selection of the preferred rehabilitation strategy was strongly related to the type and condition of the existing pavement. It also indicated that the IHR-532 rehabilitation strategy and the single rehabilitation strategy yielded similar networkwide results when compared on the basis of average condition at the end of the analysis period. However, the IHR-532 rehabilitation strategy indicated greater benefit than the single rehabilitation strategy, at any budget level, when compared on the basis of network average remaining life at the end of the analysis period.

scholarly journals Effect of Moisture Content on Calculated Dielectric Properties of Asphalt Concrete Pavements from Ground-Penetrating Radar Measurements

2021 ◽  
Vol 14 (1) ◽  
pp. 34
Author(s):  
Qingqing Cao ◽  
Imad L. Al-Qadi
Keyword(s):  
Dielectric Properties ◽  
Numerical Model ◽  
Moisture Content ◽  
Ground Penetrating Radar ◽  
Asphalt Concrete ◽  
Concrete Pavements ◽  
Proposed Model ◽  
Moisture Variation ◽  
Ground Penetrating ◽  
Non Destructive

Moisture presence in asphalt concrete (AC) pavement is a major cause of damage to the pavement. In recent decades, an increasing need exists for non-destructive detection and monitoring of the moisture content in AC pavement. This paper provides a simulated approach to quantify the effect of internal moisture content on AC pavement dielectric properties using ground-penetrating radar (GPR). A heterogeneous numerical model was developed to simulate AC pavement with internal moisture at various saturation levels. The numerical model was validated using GPR surveys on cold-in-place recycling treated pavements. An empirical formula was derived from the simulation to correlate the dielectric constant with the moisture content for non-dry AC pavement. The results validated the proposed model and, hence, demonstrated the ability of GPR to monitor moisture variation in AC pavements.

Instrumenting Ohio Test Pavement

1997 ◽  
Vol 1596 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Shad M. Sargand ◽  
Roger Green ◽  
Issam Khoury
Keyword(s):  
Asphalt Concrete ◽  
Structural Response ◽  
The United States ◽  
Department Of Transportation ◽  
Research Projects ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Delaware County ◽  
Selection Of ◽  
Highway Research

The Ohio Department of Transportation (ODOT) constructed a test pavement on US-23 in Delaware County, Ohio. Of the nine Specific Pavement Studies (SPS) formulated by the Strategic Highway Research Program (SHRP), four (SPS-1, SPS-2, SPS-8, and SPS-9) were included at the OH-SHRP DEL-23 site. Sensors were carefully selected and installed to monitor structural response and seasonal parameters on the basis of prior field experiences accumulated in the United States and Canada. Criteria used to select the sensors were cost, accuracy, sensitivity, longevity, and level of success in previous pavement research projects, especially projects in Ohio. Described here is the development of the Ohio test pavement in terms of objectives, overall instrumentation plan, and selection of sensors as well as typical instrumentation plans for asphalt concrete and portland cement concrete sections.

Monitoring Pavement Changes in a Rehabilitation Project with Continuous Rolling Dynamic Deflectometer Profiles

2005 ◽  
Vol 1905 (1) ◽  
pp. 2-16 ◽  
Author(s):  
Jeffrey L. Y. Lee ◽  
Kenneth H. Stokoe ◽  
Dar-Hao Chen ◽  
Miles R. Garrison ◽  
Boo Hyun Nam
Keyword(s):  
Asphalt Concrete ◽  
Concrete Pavement ◽  
High Potential ◽  
Department Of Transportation ◽  
Continuous Rolling ◽  
Reflection Cracking ◽  
Texas Department

The success of a rehabilitation project that involves replacement of the asphalt concrete (AC) overlay on a concrete pavement often depends on the assessment of the existing conditions and the repair of critically weak locations. In a case study, a rolling dynamic deflectometer (RDD) was used to collect continuous deflection profiles at different stages in such a project. The project, conducted by the Texas Department of Transportation, was located in the Atlanta District. The condition of the pavement was monitored with an RDD in each stage. The stages ranged from before milling of the original AC overlay to 22 months after the placement of a new overlay. The deflection profiles measured after milling were used to identify locations with a high potential for reflection cracking. After the new overlay was placed, profiling was repeated at three different times to ( a) monitor changes at locations of previously high deflections, ( b) evaluate the effectiveness of full-depth repairs, and ( c) group different AC test sections of the new overlay according to the condition of the underlying concrete pavement. It was found that the continuous deflection profiles obtained at the start of a rehabilitation project can be used to identify high-deflection locations that, if not repaired, will likely deteriorate rapidly after the new overlay is placed. The continuous deflection profile measured on the concrete pavement after milling was particularly helpful in identifying high-deflection locations that were irregularly spaced. Continuous deflection profiles, measured at various times after placement of the new overlay, effectively tracked the zones of deterioration.

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