Design Countermeasures of Preventing Frost Heaving of the Airport Cement Concrete Pavement in Cold Area

2014 ◽  
Vol 587-589 ◽  
pp. 1106-1109 ◽  
Author(s):  
Bao Hua Shi ◽  
Ping Mei ◽  
Ya Men Zhang ◽  
Bing Cao
Keyword(s):  
Drainage System ◽  
Frost Damage ◽  
Cement Concrete ◽  
Design Quality ◽  
Performance Requirements ◽  
Basic Performance ◽  
Cement Concrete Pavement ◽  
Cold Area ◽  
Frost Layer

In order to guarantee the design quality of the pavement in a cold area, by analyzing the nature conditions in the area, such a cold and long winter, short summer and high altitude, based on the reason of road frost damage, not only submit the design measure according to the basic performance requirements of structure of materials and the thickness of frost layer, but also submit the design measures according to provision of drainage system, isolated layers and blocking groundwater sources..

The Treatment Technology of Void Beneath Cement Concrete Pavement Bottom in Cold Area

2014 ◽  
Vol 1049-1050 ◽  
pp. 339-341 ◽  
Author(s):  
Zhong Gen Liu ◽  
Jing Nan Li ◽  
Guo Bin Cao
Keyword(s):  
Quality Control ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Flow Uniformity ◽  
Treatment Technology ◽  
Main Method ◽  
Key Points ◽  
Cement Concrete Pavement ◽  
Cold Area ◽  
Grouting Materials

Based on the discussion of beneath cement concrete pavement void disease, the slab bottom grouting is the main method to solve the disease, and also discussing the strength, frost resistance, resistance to shrinkage, flow uniformity, grouting construction points and ratio of grouting materials, the key points of construction quality control of grouting are specified, the cement pavement disease treatments are put forward.

scholarly journals Study on performance of old composite pavement reclaimed material in cement stabilized macadam base

2018 ◽  
Vol 53 ◽  
pp. 01041
Author(s):  
Yuxuan Yang ◽  
Peng Xiao ◽  
Shanshan Xu ◽  
Tong Wang
Keyword(s):  
Cement Content ◽  
Total Content ◽  
Recycled Aggregate ◽  
Cement Concrete ◽  
Compressive Strength Test ◽  
Cement Concrete Pavement ◽  
Negative Effect ◽  
Dry Shrinkage ◽  
Shrinkage Property

For the old composite pavement, there are two regeneration methods: the overall recycling asphalt pavement and the cement concrete pavement and the Stratified recovery. C-B-3 gradation and cement content of 5% were used. The total content of recycled aggregate is 0, 30%, 50%, 70% and 100% and the proportion of RA and RAP is about 1:2. Through compaction test， unconfined compressive strength test and dry shrinkage test, studying the feasibility of recycling composite pavement to cement stabilized macadam base. The results show that the strength of recycled cement stabilized macadam is generally higher than that of ordinary cement stabilized macadam. The strength of regenerated cement stabilized macadam can meet the strength requirements under most traffic volume of the highways in the standard. The gradation of the mixture by stratified recovery is more uniform and the quality of the mixture can be better controlled. The addition of NA has a negative effect on the dry shrinkage properties of recycled cement stabilized macadam. However, mixing RAP into recycled cement stabilized macadam can reduce the sensitivity of materials to water and enhance the dry shrinkage property of materials.

The Interface Bonding Performance Experiment Analysis of Slag Base Cement Concrete Pavement Repair Material

2013 ◽  
Vol 723 ◽  
pp. 761-766
Author(s):  
Ming Li ◽  
Xi Lan Zhi ◽  
Ai Ling Yao ◽  
Rui Jia
Keyword(s):  
Test Performance ◽  
Concrete Pavement ◽  
Additional Stress ◽  
Repair Material ◽  
Interface Bonding ◽  
Cement Concrete ◽  
Bonding Performance ◽  
Performance Requirements ◽  
Cement Concrete Pavement ◽  
New Type

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.

The Optimized Design for Groove Parameters Based on Cement Pavement Materials Performance

2011 ◽  
Vol 213 ◽  
pp. 613-617
Author(s):  
Yong Shou Yang ◽  
Xiong Yi ◽  
Peng Hu ◽  
Qiang Dong
Keyword(s):  
Theoretical Analysis ◽  
Laboratory Tests ◽  
Optimal Choice ◽  
Concrete Pavement ◽  
Service Performance ◽  
Optimized Design ◽  
Cement Concrete ◽  
Pavement Materials ◽  
Cement Concrete Pavement

Aiming at the service performance characteristics of cement concrete pavement, this paper puts forward optimized design concept for groove parameters of cement pavement. Single groove parameter optimal choice is systematically analyzed based on integrated service quality of cement pavement. Through a variety of multi-contrast laboratory tests and theoretical analysis, from three aspects of anti-slide, strength, and noise reduction, optimized design scheme of groove parameters are demonstrated and proposed, and groove parameters and form suitable for environment characteristics in seasonal frozen region are given.

The Selection Evaluation of Design Bidding

2014 ◽  
Vol 501-504 ◽  
pp. 2638-2641 ◽  
Author(s):  
Peng Cheng Pan ◽  
Yanan Shao ◽  
Huan Liu
Keyword(s):  
Index System ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Design Teams ◽  
Design Quality ◽  
Quality Cost ◽  
Quality Design

The quality of the project depends firstly on the design. Selected excellent design units can help the owner to realize the projects quality, cost and schedule target. The principles of the evaluation in design bidding were discussed in this paper. The design quality, design fees quotation, design teams service commitments, design teams ability, design institutions strength, and design institutions reputation were given as the six aspects of evaluation index system. last, the organization of evaluator was discusses.

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.

Modal Analysis and Optimization of Spindle Box of Turn-Milling Center Based on Finite Element Method

2012 ◽  
Vol 226-228 ◽  
pp. 281-284
Author(s):  
Li Da Zhu ◽  
Xiao Bang Wang ◽  
Tiao Biao Yu ◽  
Wan Shan Wang
Keyword(s):  
Finite Element ◽  
Natural Frequencies ◽  
Element Model ◽  
Ansys Software ◽  
Design Requirement ◽  
Design Quality ◽  
Machining Center ◽  
Main Components ◽  
Turn Milling

The dynamic characteristics of machine tool may directly affect its machining capability, which is analyzed to improve the machining precision and efficiency. In this paper, the 3D finite element model of main components turn-milling center is established by using ANSYS software, and then spindle box of turn-milling center is analyzed and optimized; the natural frequencies and vibration models are obtained after analysis, which guarantee the design requirement of the machining center. Therefore it is significant to improve the design quality of machining center by using FEA software in the design process.

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