Highway Concrete Pavement Research Articles

Study on mechanical properties testing of highway concrete pavement construction machinery materials

In order to solve the problems of large error and long time-consuming in the traditional mechanical property test methods, a new mechanical property test method for highway concrete pavement construction machinery materials is proposed. The relationship between the deformation component and the displacement component of the microstructure of the concrete pavement in the equilibrium coordinate system is obtained. The limit value of the critical thickness of the construction material of the highway concrete pavement is obtained by the second derivative function. Based on the analysis principle of AFM force curve, the relationship between mechanical materials and elastic modulus of highway concrete pavement construction is determined, and the performance analysis of highway concrete pavement construction mechanical materials is realised. The test results show that the error of mechanical properties analysis of highway concrete pavement construction machinery materials by the proposed method is only 0.3%, and the test time is short.

Study on mechanical properties testing of highway concrete pavement construction machinery materials

Study on mechanical properties testing of highway concrete pavement construction machinery materials

Influence of Surface Texture Characteristics on the Noise in Grooving Concrete Pavement

To thoroughly explore the relationship between concrete pavement texture characteristics and tire/pavement noise of grooving concrete pavement, the surface texture, i.e., roughness, macrotexture, and microtexture, was investigated in numerous highway pavements. The On-Board Sound Intensity (OBSI) method was used to test the pavement/tire noise. The statistical correlation between concrete pavement texture characteristics and tire/pavement noise was quantitatively described by two correlation analysis methods for highway concrete pavement: origin of linear regression and the Pearson two-sided test method. The results indicate that the effect of pavement roughness on tire/pavement noise is significant, while the noise level is minor for the flat pavement. The macro texture depth also has a marked impact on the tire/pavement noise. In addition, a large grooving depth of concrete pavement could cause a high tire/pavement noise level; however, there is no clear correlation between side-way force coefficient (SFC) and tire/pavement noise.

Analytical Evaluation of Ride Comfort on Asphalt Concrete Pavements

Abstract Ride comfort is very important in the performance evaluation of highway concrete pavements. In this paper, three indices were integrated and used for the evaluation of ride comfort on asphalt concrete pavements: (1) weighted root mean square of the acceleration, (2) root mean square of the squared differences (a measure of heart rate variability), and (3) weighted value of subjective ride comfort. The study involved collection of comprehensive experimental data for 89 highway sections in China that included pavement roughness, ride speed, acceleration, dynamic friction, psychological and physiological data, pavement condition, and questionnaires. Indices and thresholds for acceleration, heart rate variability, and subjective evaluation of ride comfort were developed. In addition, quantitative relations between ride comfort and both pavement roughness and ride speed were established for two specific ranges of dynamic friction. Graphical relations among ride comfort, pavement roughness, and ride speed were established. These relations provide useful guidelines for ride comfort evaluation and highway maintenance management.

DYNAMIC JOINT LOAD TRANSFER EFFICIENCY OF RIGID PAVEMENT

Abstrac t — the mechanistic analysis presented in this paper is only the beginning of new approach for understanding the real joint load transfer capability on airport and highway concrete pavements. It gives up the two major assumptions those have been popularly adopted by hundreds of published papers: the load is transferred under a wheel with zero speed and with fixed position. The real load transfer in field is always under wheels with non-zero speed and with varied position at any moment. The objective of this study focuses on quantifying the dynamic effects of a moving wheel while it is crossing a joint on a pavement. The analysis is conducted using a model of two-slab system on Kelvin foundation under a moving wheel with variable speed v, different pavement damping C s , foundation reaction modulus k and foundation damping C k . The dynamic joint load transfer efficiency is temporarily and empirically defined by the peak strain ratio LTE(S) on the two sides of a joint. The primary findings include: (1) The higher speed of a moving wheel leads to the higher LTE(S);(2) The larger the pavement damping C s leads to the higher LTE(S);(3) The numerical ratio c(=LTE(S) dynamic / LTE(S) static ) varies in the range 1 to 2 mainly depending on speed v and damping C s ;(4) The LTE(S) dynamic is not

Pumping Prediction Model for Highway Concrete Pavements

Pumping prediction models are important in the design and economic analysis of rigid pavements. A review of several pumping models, as well as the one developed by the writers, is presented in this paper. Pumping modeling is a very complex problem which involves many factors: slab properties, subbase properties, pavement properties, environmental factors, and traffic. The ideal pumping model should include all these factors. The pumping model presented here is based on field data from different sources and amount of deformation energy in the pavement structure. The volume of pumped material expressed in terms of the normalized pumping index is calculated as a function of the deformation energy produced by traffic. This volume is then adjusted to take into account the following conditions: subbase type, drainage conditions, load transfer adequacy, subgrade conditions, and climate. The model can be used in the optimal design of rigid pavements by predicting the effect of different design alternatives on the...