Test Method to Evaluate the Effect of Interface Bond Conditions on Top-Down and Reflective Cracking

Chen, Yu; Lopp, George; Roque, Reynaldo

doi:10.4186/ej.2012.16.4.91

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Moreover, managing the tack coat process can be challenging, as construction vehicles may cause loss of materials, and foreign substances such as fine powder and dust generated during surrounding crushing operations may impair adhesion performance [20,21]. In the case of aged concrete pavement, which has different material properties from the upper asphalt layer, higher tack coat adhesion performance is required to prevent adhesion failure and reflective cracking [22].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Polymer Modified Tack Coat on Aged Concrete Pavement: An Experimental Study on Adhesion Properties

Kim

2023

Polymers

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This study addresses the challenges of overlaying old concrete pavement with asphalt by introducing a new trackless tack coat material containing polymer. The aim is to enhance the durability of asphalt concrete overlay pavement on old cement concrete pavement. It contributes to the development of improved construction techniques for pavement rehabilitation and highlights the need for reliable adhesion performance evaluation based on different spray amounts and surface conditions. Additionally, to evaluate the effect of the adhesion performance based on the spraying amount, a tensile adhesion test was conducted by applying spray amounts of 0.30, 0.45, and 0.60 l/m2 on different surface conditions. The basic and adhesion performances of the polymer-modified tack coat material are evaluated through direct tensile and shear bond strength tests. The test outcomes demonstrated that the newly developed polymer-modified tack coat material had considerably greater adhesion strength compared to the traditional rapid-setting products. Its adhesive strength was 1.68 times higher on concrete and 1.78 times higher on asphalt. The new trackless tack coat material exhibited an adhesion performance of 1.05 MPa in direct tensile strength at 0.45 l/m2, which was 1.21 times higher than the rapid-setting tack coat. Results also confirmed that the new tack coat material exhibits values 1.90 times greater than the conventional rapid-setting tack coat material in shear bond strength, respectively. By simulating the process of separation and re-adhesion of pavement layers caused, the new tack coat material shows a tensile adhesion strength of 63% of the original state, which is advantageous for securing the durability of the pavement. Overall, the newly developed polymer-modified trackless tack coat has been shown to effectively enhance the adhesion performance between pavement layers without process delay, highlighting the potential of the new tack coat material to enhance the durability of asphalt concrete overlay pavement on old cement concrete pavement.

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Section: Introductionmentioning

confidence: 99%