Performance and Application of Sampave Overlaying on Old Cement Concrete Pavement

2011 ◽  
Vol 255-260 ◽  
pp. 3223-3227
Author(s):  
Ming Liang Xing ◽  
Shuan Fa Chen ◽  
Zu Zhong Li ◽  
Hua Xin Chen ◽  
Bing Gang Wang
Keyword(s):  
Fatigue Life ◽  
Low Temperature ◽  
Creep Test ◽  
Asphalt Mixture ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Good Ability ◽  
Cement Concrete Pavement ◽  
And Performance ◽  
Better Than

How to prevent and delay the emergence of reflective cracks effectively is a most important task for road researchers to the asphalt mixture overlaid on the old cement concrete pavement. Several methods preventing reflective cracks prevention have been used before, but few are satisfied. In this paper Sampave is put forward as a new method or structure which is better than the others. Base on principle of reflective cracks, a new layer named Sampave was put forward. And this paper discusses its aspaht, gradation and performance. According to the requirement reasonable gradation is suggested for practice. By means of researching on materials performance in the lab, it is obviously that Sampave has good performance at low temperature. Results of bending and creep test indicate that Sampave has good ability in resisting deformation. Meanwhile the result of fatigue test indicates that the fatigue life of Sampave is more than 210 thousand, therefore it has good performance in anti-cracking, and also the results of application in the project show its advantages in resisting reflective cracks.

The Research on the Temperature Resistance Test of Polypropylene Geotextile in Asphalt Overlay

2012 ◽  
Vol 178-181 ◽  
pp. 1287-1292
Author(s):  
Rong Guo Hou ◽  
Bo Tian ◽  
Lei Quan
Keyword(s):  
High Temperature ◽  
Melting Point ◽  
Asphalt Mixture ◽  
Concrete Pavement ◽  
Temperature Fields ◽  
Cement Concrete ◽  
Modeling And Analysis ◽  
Temperature Resistance ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement

The melting point of polypropylene geotextile is 170 centigrade. However, during the repaving design of the old cement concrete pavement, the paving temperature of the asphalt mixture is often 160-170 centigrade or above. Therefore, it is very important to verify that whether the polypropylene geotextile can be paved under a high temperature. Through the modeling and analysis of temperature fields and relevant temperature tests in the laboratory, the paper has tested the surface temperatures of the polypropylene geotexile when the asphalt mixture is paved under a high temperature. The results show that, under a simulated paving temperature of over 190 centigrade, the highest temperature of polypropylene geotextile is only about 160 centigrade, which is lower than its melting point. Therefore, the polypropylene geotextile can be used for the paving under a high temperature.

scholarly journals Durability of concrete pavement strengthened with asphalt layer with FRP fibres

2018 ◽  
Vol 64 (3) ◽  
pp. 81-97
Author(s):  
P. Tutka ◽  
R. Nagórski ◽  
P. Radziszewski ◽  
M. Sarnowski ◽  
M. Złotowska
Keyword(s):  
Fatigue Life ◽  
Concrete Slab ◽  
Asphalt Mixture ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Asphalt Overlay ◽  
Road Pavement ◽  
Traffic Loads ◽  
Pavement Structures ◽  
The Impact

SummaryPavements made of cement concrete, used for road constructions, are damaged during use. This applies to both the pavements of rural and forest roads with very low traffic loads, as well as road pavements with high traffic loads. One of the most effective ways of repairing damaged concrete cement pavements is through placing an asphalt overlay on a concrete slab. In order to increase the fatigue life of the asphalt overlay, asphalt mixtures are modified with fibres. One technological solution is to use FRP (Fiber Reinforced Polymer), an innovative material with improved properties. The aim of this paper is to assess the impact of asphalt overlays modified with a new type of fibres to strengthen the durability of weakened cement concrete pavement structures. On the basis of the conducted analyses, it was shown that the use of an asphalt layer reinforcement increases fatigue life, for both 15 cm thick prefabricated slabs and a typical road pavement for average traffic made of 25 cm doweled and anchored concrete slabs. There was a significant increase in the fatigue life of the concrete pavement structure as a result of modifying the overlaid asphalt mixture with FRP fibres.

scholarly journals Reflection Crack Analysis of Asphalt Overlay on Cement Concrete Pavement Based on XFEM

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Qiang Li ◽  
Zhixiang Chen ◽  
Shaohui Luo
Keyword(s):  
Asphalt Mixture ◽  
Three Dimensional ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Extended Finite Element ◽  
Reflection Cracking ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Cracking Characteristics ◽  
Predicted Values

Based on the improved Paris formula, the reflection cracking characteristics of asphalt overlay on the cement concrete pavement are carefully scrutinized. The fatigue life is also predicted through the indoor simulation tests and establishing the two- and three-dimensional extended finite-element method (XFEM) models. Four fracture factors of the Paris formula in the asphalt mixture are appropriately calculated by fitting the N-a curve of the indoor test, and their predicted values are then exploited in the numerical simulations. The obtained results show that the numerical model can successfully predict the results of the indoor simulation test. It indicates that the XFEM has apparent advantages in examining the reflection cracking of the asphalt overlay on the cement concrete pavement.

Analysis on Void Beneath Curling Slab in Rigid Base Cement Concrete Pavement and Fatigue Life Prediction

2012 ◽  
Vol 204-208 ◽  
pp. 1782-1788 ◽  
Author(s):  
Qing Zhang ◽  
Yun Chen Sun ◽  
Jing Jing Li
Keyword(s):  
Fatigue Life ◽  
Temperature Gradient ◽  
Service Life ◽  
Life Prediction ◽  
Concrete Pavement ◽  
Fatigue Life Prediction ◽  
Rigid Base ◽  
Cement Concrete ◽  
Cement Concrete Pavement ◽  
Fatigue Life Analysis

The damages in two rigid base cement concrete pavement were investigated. The data analysis suggests that the void beneath curling slab resulting from the temperature gradient changing leads to pavement damages. With the benefit of the pavement curling structure numerical model established in this article, the void changing law beneath curling slab and loading stress were analyzed. The loading stress level increases dramatically due to void occurring beneath curling slab. The calculation method of loading stress in the curling slab was given. The fatigue life analysis further reveals that the void beneath curling slab caused by temperature gradient changes is the fundamental reason for the decreasing of the service life of cement concrete pavement. The service life of investigating section were predicted and analyzed according to the fatigue life prediction model established in this article and the survey data.

Stress Analysis of Cement Concrete Pavement under Overweight Loads

2012 ◽  
Vol 446-449 ◽  
pp. 949-953
Author(s):  
Ya Ni Lu ◽  
Tao Li Xiao
Keyword(s):  
Finite Element ◽  
Regression Analysis ◽  
Finite Element Model ◽  
Element Model ◽  
Concrete Pavement ◽  
The Other ◽  
Tension Stress ◽  
Statistical Regression ◽  
Cement Concrete ◽  
Cement Concrete Pavement

Special load has produced serious damage to the concrete pavement because of the great gross weight and heavy axle load, but the present specification has not mentioned this kind of load. On this occasion, Several conditions of critical load are identified through ANSYS finite element model analysis and the formula through statistical regression analysis to the bottom maximum tension stress is drawn up. Which can not only guide the concrete pavement design under the special load but also the result may be referred by the other kinds of engineering.

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