Advanced Materials Research Vol. 723

Abstract: The research is to compound (1) the Reclaimed Asphalt Pavement (RAP) with the asphalt penetration less than 15 (25°C, 5sec, 100g) and the gravel aggregates of the base course adopted from the existing roads, and (2) the cement binder into Regenerated Low-Density Pervious Concrete (RLDPC) whose the compressive strength is between 25 to 50 (kgf/cm²) and whose permeable capacity (ml/15sec) is greater than 600. The results show the RLDPC used as the pavement gravel gradation layer or as Controlled Low Strength Material (CLSM) that is more advantageous on (1) reducing the costs of re-filling pavement, (2) enhancing the durability of roads, and (3) increasing the flowing space of underground water.

Abstract: This study explored the thermal behavior of permeable pavement during summer. T-type thermo-couple needle was utilized to measure the surface temperature of three different permeable pavement materials. Data were measured based upon the 24 solar terms of the traditional Chinese lunisolar calendar and the results of Great Heat in comparison with other solar terms showed significant differences. Heat output model calculation results show that the average heat output is the lowest for grass bricks because of its high reflectivity. This material has a cooling effect, followed by permeable interlocking bricks. Permeable asphalt concrete can reduce pavement temperature but there were limitations to its performance.

Abstract: The objectives of this paper are to present the feasibility of utilizing reliability-based method to quantify life-cycle cost associated with performance specification. And a framework develops for quantifying the life-cycle cost. The framework consists of three components: (1) the pavement deterioration performance prediction; (2) the reliability-based risk estimation; and (3) the life-cycle cost analysis. An example is illustrated using the International Roughness Index (IRI) data to demonstrate how the approach works. The approach has potential for use in valuation of long term pavement maintenance contracts.

Abstract: In order to study the cracks resisting mechanism of large stone asphalt mixture base, a multi-layer elastic theory program was used to calculate the loading stress in different pavement structures. Then a Finite Element model was established based on a twinkling heat conduct hypothesis to calculate temperature stress and strain of pavement structure when temperature dropped. Finally, the stress and strain of all the structural layers was calculated considering the coupling effect of loading and temperature. It is found that temperature stress which is caused by temperate quick dropped is far more lager than loading stress cause by standard loading, while considering the co-effect of vehicle loading and temperature quickly dropped. Thus it is revealed that cracking in pavement is mainly caused by temperature quickly dropped. By contrast, it is found that pavement stress and strain caused by loading and temperature of the structure with asphalt macadam mixture (ATB30) base are less than that of the conventional semi-rigid pavement. Finally, an asphalt macadam mixture base applied in asphalt pavement structure is believed to be an efficient way in reducing asphalt pavement cracking.

Abstract: Results from a third mobile load simulator (MLS3) experiment indicates that in-situ determination of the under laying pavement material elastic modulus properties using the back calculation method from falling weight deflection measurements provide reliable material model inputs for finite element analysis. In this study, finite element (FE) prediction models available in abaqus were implemented to simulate the rutting performance of asphalt mixture overlays under accelerated loading. A unified, three dimensional pavement section was proposed as a constitutive material model for the rutting prediction of various pavement section combinations in FE analysis. The asphalt overlay mix was treated as an elastic material and its corresponding material properties were determined from laboratory tests while falling weight deflection tests were conducted to determine the underlaying layer moduli. In general, the FE creep and elasto-viscoplastic models predicted that rutting developments match well with the MLS3 measured results. However, to perform an effective evaluation of the FE simulation analysis and obtain reliable prediction results from an MLS3 experiment, some special techniques to obtain and characterize material input parameters are deemed necessary.

Abstract: In Korea, recently, surface treatments are recommended to use in distressed pavements due to cost-effective, extension of pavement life, and improvement of surface performance such as friction and noise. In this study, microsurfacing and polymer slurry seal are selected to evaluate assessment of field application and their performance. The test section using both surface treatments were built on hot-mix asphalt (HMA) surfaced national highway at the same time and then their performance are monitored right after the construction. To evaluate the field performance of surface treatments, friction, noise, crack and IRI values are measured using noise-measuring vehicle, British pendulum tester (BPT), and pavement evaluation surveyor (PES) before and after applying surface treatments. On the basis of the field performance of surface treatments, pavement surface treated with microsurfacing and polymer slurry seal shows better fiction resistance and noise reduction compared to pavement surface without preservation treatment. It is postulated that the surface characteristics using surface treatments can be improved but long-term performance should be monitored over the service life.

Abstract: Developing a method that quantitatively evaluates and compares the overall performance from economic (agency) and user service perspectives of the highways constructed with different designs, different construction practices, in different places with different environments, and under different traffic conditions with different Maintenance and Rehabilitation (M&R) histories, has been challenging. The factors (costs, effectiveness and traffic volume) are studied in this paper and then an economic and user service-based performance measure method is proposed to identify high or low pavement overall performance. The two indicators, Equivalent Comprehensive Cost (ECC) and an Average Service Level (ASL), in this method are proposed to evaluate the unit agency costs and average service level over the analysis period of the project quantitatively. Two different pavement projects were generated with hypothetical data to illustrate the ability of the proposed method to compare the overall performance of different projects, and a sensitivity analysis of the discount rate was also studied and discussed. Future research is recommended.

Abstract: Due to the effect of various additional stress,cement concrete pavement repair material and the original road interface been damaged,which cause pavement breakdown. In order to solve this problem,this paper analyzing the reason of new and old concrete interface weakness and the require of interface bonding performance,the flexural bonding experiment method is used to test performance,and to verify slag base as a new type of repair material,which matched with cement paste contains expansion agent as an interface boning agent.Results shows that this new repair material can satisfy the interface bonding performance requirements very well.

Abstract: Treatment selection techniques used in Pavement Management Systems often rely on predefined priorities outlined by state road agency which are subject to priority and engineering judgement. These techniques can be implemented over multi-period planning horizons however doesnt necessarily provide the best possible works program. This paper presents an overview of Pavement Management Systems, then describes and analyses the four main categories of treatment selection techniques employed within these systems. An overview of the Pavement Management System implemented by the Queensland Department of Transport and Main Roads and in particular its process of treatment selection is outlined. In addition a comparative analysis is then undertaken with each of these treatment selection categories.

Abstract: In this article, the Tabular CUSUM (Cumulative Sum) Charts statistic method is employed to analyze the strength quality control of ready-mixed concrete for rigid pavement, for which the CUSUM is also used to analyze and monitor the micro changes of process mean for the strength of the ready-mixed concrete. The result of analytical study supports that the CUSUM statistical analysis skill is more sensitive than the Shewhart Control Chart in terms of designed mixing ratio parameter, water-cement ratio, and admixtures analyzed under the same concrete strength. When micro changes are presented in continuous mean strength value of the ready-mixed concrete, it can detect the continual changes of the concrete quality in a more accurate way. By combining the CUSUM statistical analysis and Shewhart Control Chart, higher accuracy of the quality control analysis could even be achieved in order the enhance quality control performance when pouring the ready-mix concrete on rigid pavement.