Field Performance of Bonded Concrete Overlays PDF Download

Author: Gerald F. Voigt
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 42

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Author:
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Category : Pavements, Concrete
Languages : en
Pages : 58

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Author:
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ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 192

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Author: Lucas Agustin Lahitou
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ISBN:
Category : Pavements
Languages : en
Pages : 53

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Author: Hans-Dieter Beushausen
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Category :
Languages : en
Pages : 532

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Author: Michael I. Darter
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Category : Cement coating
Languages : en
Pages : 0

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Author: Walter P. Kilareski
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ISBN:
Category : Pavements
Languages : en
Pages : 136

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A major field study and evaluation has been conducted into the effectiveness of three structural overlay types for portland cement concrete (PCC) pavements. These include sawing and sealing asphalt concrete (AC) overlays of PCC pavements, cracking and seating PCC pavements prior to AC overlay, and constructing a thin bonded PCC overlay on top of the existing PCC pavement. Condition surveys, deflection testing, and roughness measurements were performed on a total of 55 sections. The performance of these sections was evaluated and the effectiveness of each overlay type analyzed.

Author: Gary Harris
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 36

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The use of a thin bonded concrete overlay atop an older surface has been widely incorporated for pavement rehabilitation in Iowa since the early 70's. Two test sections were constructed in 1985 on county road T61 on the Monroe-Wapello County line without the use of grout as a bonding agent to determine if adequate bond could be achieved and structural capacity uncompromised. Both test sections have performed well with one section having higher bond strengths, lower roughness values, higher structural capacity, and less debonding at the joints than the other section. Overall, both ungrouted sections have performed well under substantial truck traffic with minimal surface distress. More attention should be given, however, to rectifying apparent debonding at the joints when no grout is used as a bonding agent.

Author: Lawrence I. Knab
Publisher:
ISBN:
Category : Adhesion
Languages : en
Pages : 102

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Preliminary bond-strength performance criteria were developed for screening and selecting portland-cement concrete (PCC) and latex-modified concrete (LMC) materials to be overlaid on PCC pavements and PCC bridge decks subjected to normal civilian truck and automobile traffic. The criteria were developed based on direct shear bond test results from (i) field cores from pavements and bridge decks which were considered to have performed satisfactorily, and (ii) laboratory- and field-cast specimens with PCC and LMC overlay materials. The criteria consist of minimum direct shear bond strength levels and corresponding minimum compressive strength levels. A direct shear "guillotine"-type performance bond test method, developed at the Brookhaven National Laboratories, was specified using laboratory-cast specimens. The criteria are preliminary because: (i) the criteria are based on very limited field- and laboratory-based bond strengths and should be further verified by being correlated with field performance, including various service conditions (temperature, moisture, wheel loading, etc.)., (ii) the criteria need to be assessed with regard to repeatability within, and reproducibility among laboratories, (iii) the effects of material variables (aggregate, cement, mix design, etc.), surface preparation, placement procedures, curing conditions, and curing duration on the criteria need to be evaluated. Therefore, the criteria are a starting point and should be evaluated on a trial basis; most likely, the criteria will need to be modified as additional field performance results and laboratory experience are obtained. A notable limitation of the "guillotine" performance test method is its relatively poor precision, as evidenced by relatively large coefficient of variation values associated with the test method. Although the limitation of imprecision exists, the "guillotine" test method is still considered to be the best available performance bond test method for which field performance data exist. Field-performance data need to be obtained for other bond test methods with potentially better precision, such as the uniaxial tension test method, which was also investigated in the laboratory and reported in this report.

Author: Logan Michael Young
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 552

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