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

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.

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.

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).

scholarly journals NUMERICAL ANALYSIS OF LONGITUDINAL REINFORCEMENT EFFECT ON RC SLAB PUNCHING SHEAR RESISTANCE BY STRENGTH AND CRACK PROPAGATION CRITERIA

2021 ◽  
Vol 17 (1) ◽  
pp. 21-33
Author(s):  
Oleg Kabantsev ◽  
Sergey Krylov ◽  
Sergey Trofimov
Keyword(s):  
Reinforced Concrete ◽  
Crack Resistance ◽  
Concrete Slab ◽  
National Standards ◽  
Longitudinal Reinforcement ◽  
Reinforced Concrete Slab ◽  
Numerical Studies ◽  
Reinforced Concrete Slabs ◽  
Physical Experiments ◽  
Punching Failure

he article deals with the influnce of longitudinal reinforcement of the support zone of reinforced concrete slabs on the strength and crack resistance under the criterion for punching failure. The evaluation of impact was carried out by the method of numerical studies based on finite-elementcomputational technologies. The results of physical experiments published in the scientificliterature are taken as the basis for the conducted research. The existing provisions of the existing domestic and foreign standards for the calculation of slab reinforced concrete structures according to the criterion for punching failure are considered. The main provisions of the applied finit element approach are presented, verificationis performed and the correctness of the applied technique is justified In the numerical studies, the forecast of strength and crack resistance was done for considered reinforced concrete slab structures; the results of numerical studies were compared with the data from physical experiments and the evaluation results based on the relevant domestic and foreign regulations. According to numerical studies results it was stated that longitudinal reinforcement of the tensile zone of slab structure has a significantimpact on both the level of load-bearing capacity and the scheme of crack formation and propagation. The results of the implemented studies justify the necessity to revise the national standards of structural analysis for reinforcement concrete slab structures under the criterion for punching failure.

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.

The Application of Fiber Reinforced Concrete in Cement Concrete Pavement

2013 ◽  
Vol 634-638 ◽  
pp. 2094-2097 ◽  
Author(s):  
Tao Zhang ◽  
Yun Yun Xu ◽  
Zhen Rong Lin
Keyword(s):  
Reinforced Concrete ◽  
Building Materials ◽  
Impact Resistance ◽  
Research Field ◽  
Concrete Pavement ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Cement Concrete ◽  
Cement Concrete Pavement ◽  
The Status

Concrete is the most widely used building material in the world. In terms of traffic and bridge construction, concrete is also the most widely used building materials. The cement concrete of the inherent advantages of having a high compressive strength while also has easy to produce cracks, poor impact resistance inherent weaknesses. These weaknesses limit the application of cement concrete. In order to improve the comprehensive quality of the concrete, to further improve the scope of application of cement concrete pavement, the main problems of cement concrete pavement is analyzed. Then the progress of the current hot research field of fiber reinforced concrete is analyzed comprehensively. Finally, on the basis of summing up the status quo, the next step is to study key issues is presented.

Crack Resistance of the Old Cement Concrete Pavement Treatment

2012 ◽  
Vol 190-191 ◽  
pp. 440-443
Author(s):  
Hong Jiang ◽  
Jian Bo Yuan ◽  
Hua Yang
Keyword(s):  
Crack Resistance ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Cement Concrete Pavement ◽  
Technical Solutions

Overlay new cement concrete pavement on the old cement concrete pavement following different treatment schemes, survey pavement cracking phenomenon after the opening of the new pavement , analysis the crack resistance of the various programs, accumulate experience for the cement concrete pavement repair technical solutions.

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.

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