Stress Analysis for Cement Concrete around Joint Dowel after Loosing

2013 ◽  
Vol 857 ◽  
pp. 222-226
Author(s):  
Rong Guo Hou ◽  
Kai Min Niu
Keyword(s):  
Shear Stress ◽  
Stress Concentration ◽  
Load Transfer ◽  
Concrete Slab ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Transfer Capability ◽  
Cement Concrete Pavement ◽  
Contraction Joint ◽  
Increasing Load

The stress concentration will appear in cement concrete around joint dowel set in contraction joint of cement concrete pavement with repeated loads. And concrete around joint dowel will damage gradually.In this paper, the stress of concrete around joint dowel and deflection of concrete slab are analyzed when joint dowel loosing. It is indicated that the shear stress is key to damage of concrete around joint dowel. when the loosing width reaches certain extent. With loosing width increasing, load transfer capacity will decrease gradually. And it is shown that the load transfer capability will lower rapidly when the loosing width comes in 4cm.

Long-Term Performance of Recycled Portland Cement Concrete Pavement

1996 ◽  
Vol 1525 (1) ◽  
pp. 115-123 ◽  
Author(s):  
Stephen A. Cross ◽  
Mohamed Nagib Abou-Zeid ◽  
John B. Wojakowski ◽  
Glenn A. Fager
Keyword(s):  
Portland Cement ◽  
Test Section ◽  
Load Transfer ◽  
Construction Materials ◽  
Concrete Pavement ◽  
Recycled Concrete ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Cement Concrete Pavement ◽  
Portland Cement Concrete Pavement

Over the past years there has been an increasing interest in recycling construction materials, particularly hot-mix asphalt (HMA) and portland cement concrete pavements (PCCP). To this end the Kansas Department of Transportation (KDOT) participated in Demonstration Project 47, Recycling Portland Cement Concrete Pavement, by recycling a moderately D-cracked concrete pavement and monitoring the performance over a 10-year period. The recycled concrete pavement (RCP) aggregate was evaluated in four test sections consisting of two control sections, one test section of portland cement-treated base (CTB) with RCP aggregate, and one test section using RCP aggregate in the PCCP and CTB. An HMA shoulder using RCP as coarse aggregate was also constructed. The test sections were monitored over a 10-year period for performance including faulting, roughness, load transfer, and friction measurements. Faulting, roughness, performance level, and joint distress measurements from KDOT's 1995 pavement condition survey were used to compare the performance of the recycled sections with PCCP of similar age and traffic in the same area of the state. All test sections performed well, with the CTB and PCCP sections with RCP aggregates showing slightly more distress.

Research of Zero Stress Temperature Gradient in Cement Concrete Pavement

2013 ◽  
Vol 723 ◽  
pp. 163-170 ◽  
Author(s):  
Xiang Shen Hou ◽  
Xin Kai Li ◽  
Bo Peng ◽  
Guang Hui Deng
Keyword(s):  
Temperature Gradient ◽  
Concrete Beam ◽  
Concrete Slab ◽  
Strain Sensor ◽  
Concrete Pavement ◽  
Early Age ◽  
Cement Concrete ◽  
Setting Process ◽  
Cement Concrete Pavement ◽  
Design Guidance

There is no temperature stress and temperature curling according to the present cement concrete pavement design, when the temperature gradient of cement concrete pavement in service is zero, and it does not consider the effect of Built-in curling caused in early-age setting process of cement concrete to cement concrete pavement in service. In fact, there is Built-in curling in cement concrete slab when it is after the completion of the cement concrete slab is poured, and the curling is mainly upward. It is in the setting process, when cement concrete is on the final set, the cement concrete is at the critical moment when is just able to bear load, and it exists temperature gradient but no strain in the pavement slab, the temperature gradient is known as "Built-in construction temperature gradient" in AASHTO2002 design guidance, and it is the important part of the Built-in curling. In this paper, cement concrete beam specimens were poured in outdoor and temperature sensor and strain sensor were buried in the cement concrete specimens to detect early-age internal temperature field and strain field, and then the study of Built-in curling and Built-in construction temperature gradient were carried out.

Research on the Contraction Joint Width of Rubberized Concrete Pavement

2011 ◽  
Vol 287-290 ◽  
pp. 436-444 ◽  
Author(s):  
Feng Qin ◽  
Zhuang Bin He ◽  
Qiong Nian Huang
Keyword(s):  
Portland Cement ◽  
Engineering Application ◽  
Concrete Pavement ◽  
Rubberized Concrete ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Joint Spacing ◽  
Cement Concrete Pavement ◽  
Contraction Joint ◽  
Portland Cement Concrete Pavement

This paper describes the calculation analysis of joint open, and the research has been carried up on Portland cement concrete pavement and rubberized concrete pavement with the consideration of hogging distortion caused by temperature, expansion deformation and drying shrinkage. Finally ,it were observed that joint open of 6m contraction joint spacing for rubberized concrete pavement is the same as 4.5m contraction joint spacing for Portland cement concrete pavement. The above analysis provides the possibility of 6-meter contraction joint spacing for rubberized concrete pavement which give theoretical basis for engineering application.

Numerical Simulation of the Process of Partial Void Formation under Cement Concrete Pavement Slab

2011 ◽  
Vol 97-98 ◽  
pp. 241-246
Author(s):  
Xiao Chun Zhang ◽  
Shu Shu Liu ◽  
Shi Kui Hu ◽  
Ning Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Concrete Slab ◽  
Void Formation ◽  
Concrete Pavement ◽  
Void Size ◽  
Cement Concrete ◽  
Center Edge ◽  
Cement Concrete Pavement ◽  
D Model

The damage of void under cement concrete slab is one of the main diseases in cement concrete pavement. By finite element method, a 3-D model of cement concrete pavement structure was established to simulate the partial void under the cement concrete pavement slab with different loading conditions. The process of the division between the subgrade and the slab with a soft area under the slab are reappeared. The changing rules of the void size with the number of cycle load in case of different tie pressure and loading location (at the center, edge or corner of the slab).

The Thermal Stress Analysis on Stress Absorption Interlayer of Asphalt Overlay

2012 ◽  
Vol 174-177 ◽  
pp. 570-574
Author(s):  
Peng Tao Xue ◽  
Xiu Shan Wang
Keyword(s):  
Shear Stress ◽  
Thermal Stress ◽  
Vertical Displacement ◽  
Concrete Pavement ◽  
Laminar Shear Stress ◽  
Cement Concrete ◽  
Bottom Stress ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Laminar Shear

By using finite element method, the thermal stress of stress absorption interlayer of asphalt overlay on the cement concrete pavement is analyzed in this paper. The result shows that the inter-laminar shear stress and the structural vertical displacement are influenced by the thickness of stress absorption layer, while the asphalt bottom stress is less affected; the increase of the modulus is unfavorable to the structural vertical displacement, the inter-laminar shear stress and the asphalt bottom stress.

Analysis of the Mode of Crushing and Stability in Old Cement Pavement during Asphalt Overlay Project

2012 ◽  
Vol 204-208 ◽  
pp. 1941-1944 ◽  
Author(s):  
Hua Wang ◽  
Yun Feng Wu ◽  
Song Ye
Keyword(s):  
Concrete Slab ◽  
Relative Displacement ◽  
Concrete Pavement ◽  
Construction Technology ◽  
Reflective Cracking ◽  
Cement Concrete ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Pressure Impact

In the process of old cement concrete pavement is transformed, asphalt overlay is the common method. However, due to the cracks of the original cement concrete slab when load and temperature and humidity changes will produce a relative displacement, it can not avoid reflective cracking. So in order to prevent the reflective cracking of asphalt overlay, crush the old cement concrete pavement is the important manner. Different construction technology is divided into three kinds: cracked steady pressure, impact compaction and rubblization technology. Among these, rubblization is an important technology that utilizes in-situ crushing technique in cement concrete pavement. This article discusses the characteristics of these three techniques, and it also evaluates effectiveness.

Influence of the Dispensation of Transfer Bar to the Load Coefficient at Concrete Pavement Seam

2013 ◽  
Vol 392 ◽  
pp. 895-899
Author(s):  
Fang Ran Zhao ◽  
Ye Ming Li
Keyword(s):  
Finite Element ◽  
Load Transfer ◽  
Three Dimensional ◽  
Element Model ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Cement Concrete Pavement ◽  
Dimensional Finite Element ◽  
Joint Width ◽  
Three Dimensional Finite Element

The airport cement concrete pavement seam is very important to the bearing capacity and Flatness. Considering the importance of seams, a detailed three-dimensional finite element model was used to investigate the state of seams. According the calculation method of load transfer coefficient, the coefficient was obtained. Comparing the different coefficient, the best position of dowel steels, the best diameter of dowel steels, the best buried depth of dowel steels and the best joint width of dowel steels all can be gained best joint width of dowel steels all can be gained.

Load Stress Analysis of the Impact of Parameters Variation on Super-Thick Cement Concrete Pavement

2011 ◽  
Vol 255-260 ◽  
pp. 3254-3257 ◽  
Author(s):  
Bin Yang ◽  
Li Jun Suo ◽  
Chun Ren Zhou ◽  
Kai Liang Dong
Keyword(s):  
Concrete Slab ◽  
Element Model ◽  
Concrete Pavement ◽  
Slab Thickness ◽  
Structure Parameters ◽  
Cement Concrete ◽  
Obvious Effect ◽  
Cement Concrete Pavement ◽  
Pavement Structure ◽  
The Impact

With the goal of exploring the impact of pavement structure parameters on load stress of super-thick cement concrete pavement, this paper, based on the Quanxing freeway in Guangxi, analyzes the load stress in the situation of the separated type and combined type contact between the cement concrete slab and the lean concrete base by using three-dimensional finite element model. Computational results show that the variation of different pavement structure parameters have various impacts on the load stress of super-thick cement concrete pavement. The load stress σc1 of super-thick cement concrete pavement slab declines with the increase of slab thickness h1 and base thickness h2 and decreases with the reduction of slab length L and the increases of base modulus E2 and subbase modulus Et. Among them, the variation of slab thickness h1 has the greatest impact on the pavement load stress. Thus, there is a quite obvious effect in reducing the pavement load stress by increasing the slab thickness.

Prospects of application of cement concrete coating on transport buildings

2021 ◽  
Vol 2021 (23) ◽  
pp. 178-196
Author(s):  
Artur Onyshchenko ◽  
◽  
Mykola Garkusha ◽  
Oleg Fedorenko ◽  
Oleksandr Davydenko ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Crack Resistance ◽  
Crack Formation ◽  
Concrete Slab ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Reinforced Concrete Slab ◽  
Technical Literature ◽  
Cement Concrete Pavement ◽  
Prospects Of Application

Introduction. Road bridges are an integral part of the road network of transport infrastructure of Ukraine. The technical condition of the vast majority of road bridges does not meet modern requirements for road safety and structural reliability of structural elements.Problems. There are no recommendations for the design and installation of cement-concrete pavement on the reinforced concrete slab of the carriageway of road bridges, as well as an album of standard solutions of such structures.Goal. Analysis of the causes and types of cracking on cement concrete pavement, technical literature and current regulations on the calculation of crack resistance and durability of cement concrete pavement on the reinforced concrete slab of the carriageway of road bridges.Results. The analysis of application of a cement concrete covering on transport constructions is carried out. The causes and types of crack formation on cement-concrete pavement are established. The analysis of technical literature and current normative documentation on calculation of crack resistance and durability of cement concrete pavement on the reinforced concrete slab of road bridges is carried out.Conclusions. The analysis of prospects of application of a cement concrete covering on transport constructions is carried out in work.Keywords: road bridge, durability, reinforced concrete slab, crack formation, carriageway, crack resistance, cement concrete pavement

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