High Performance Concrete in Highway Bridge in Cold and Arid Regions

2012 ◽  
Vol 214 ◽  
pp. 35-39 ◽  
Author(s):  
Zhi Yuan Wang
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
High Strength ◽  
Modern Technology ◽  
Highway Bridge ◽  
Construction Technology ◽  
High Quality ◽  
High Durability ◽  
Development Direction

High performance concrete originated in the generation of high strength concrete, and it is a new high technology of concrete, is in common with high quality and in concrete. High durability on the perspective of improvement and become, use a lot of high quality raw materials and modern technology, is the main development direction of concrete. Because its comprehensive performance by the superiority of the focus of the society, the strict construction technology in the extensive application in the highway bridge, high performance can the use of concrete can improve the efficiency of its safety and avoid unnecessary accidents

Application Research of C80 High-Performance Concrete for the Guangzhou East Tower

2014 ◽  
Vol 584-586 ◽  
pp. 1635-1640
Author(s):  
Yi Dong ◽  
Nai Qian Feng ◽  
Hao Wen Ye ◽  
Hu Yan Ling ◽  
Li Xun Lin ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Building Design ◽  
Construction Technology ◽  
Application Research ◽  
Concrete Technology ◽  
High Durability ◽  
Furnace Slag ◽  
Modern Building

With the development of modern building design and construction technology, high strength concrete technology were getting more use in engineering and more requirements. The authors produced C80 HPC by using Portland cement, blast furnace slag, micro bead and Flyash as cementitious material, have prepared the concrete with grade of C80, low pumping resistance (rewinding time less than 6s), low shrink (72h early self-shrinkage value at 0.028%), high workability (slumps over 240mm and divergence over 700mm) and high durability (diffusion coefficient in concrete after 28d was 1.35×10-12 m2/s), which would match the requirements of the Guangzhou East Tower.

Industrial Test on Outer Frozen Shaft Wall of High Strength and High Performance Concrete

2011 ◽  
Vol 179-180 ◽  
pp. 569-574
Author(s):  
Zhong Wen Yue ◽  
Hui Zhang ◽  
Bo Yang Dou
Keyword(s):  
Quality Control ◽  
Industrial Application ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Industrial Test ◽  
Construction Technology ◽  
Study Results ◽  
Shaft Lining ◽  
Shaft Wall

To study the industrial technology for application of the C100 High strength and high performance concrete which is in freezing shaft lining of thick overburden, the industrial test of the shaft wall of high strength and high performance concrete is carried out under the engineering background of auxiliary shaft in Yuncheng coal mine of Juye coal mining area in Shandong Province. The verified laboratory testing results comported with the results of industrial technology from macro-mechanics, failure fractal, resultant morphology and pore characteristics. And the quality control system of high performance concrete and construction technology can be established. The results show that the experimental formula and construction technology of C100 high strength and high performance concrete can meet the requirement of field concrete shaft lining and achieve the high level of quality control. The industrial application and study results accord with the field requirement. Furthermore, the study results also provide experimental basis and industrial production data for industrial application of C100 high strength and high performance concrete.

Nanoadditives - Future of High Performance Concrete

2017 ◽  
Vol 908 ◽  
pp. 83-87
Author(s):  
Martin Labaj ◽  
Jaroslav Válek ◽  
Tomáš Jarolím ◽  
Lucia Osuská
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Concrete Surface ◽  
Cement Stone ◽  
Hardened Cement ◽  
Concrete Technology ◽  
High Quality ◽  
Long Time ◽  
The Impact

These days it is almost impossible to imagine the technology of high performance concrete without the use of any kind of additive. Whether it is a material capable of achieving high strength, excellent mobility of the fresh mix without losing cohesion or producing high quality architectural concrete surface, microadditives have their certain place for a long time now. Although the research in this field still has something to offer, it does not hurt to try to consider the future and imagine the path that will be taken in the production of high performance concrete of next generation. The article deals with the possibility of using nanoparticles in concrete technology. These materials can actively participate in the creation of very high-quality cement stone. In addition, due to the extreme reactivity of nanoparticles, these reactions can take place almost immediately after the onset of hydration and during its first hours. The experimental part of the paper assesses the impact of nanoparticles on selected properties of fresh cement paste and hardened cement mortar. In all cases, there was a positive effect and it has been demonstrated that nanoparticles may eventually create a new category of high performance concrete additives.

Preparation Experiment and Engineering Application of High Performance Concrete of Freezing Shaft in Deep Alluvium

2014 ◽  
Vol 584-586 ◽  
pp. 1407-1411
Author(s):  
Zhi Shu Yao ◽  
Zhen Xu ◽  
Hai Qing Song
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
Engineering Application ◽  
High Strength ◽  
Engineering Practice ◽  
Mixture Ratio ◽  
Curing Conditions ◽  
Remarkable Effect ◽  
Shaft Lining

According to the special construction environment and curing conditions of the freezing shaft inner and outer shaft lining in deep alluvium, first,configuration principle of high strength high performance concrete of freezing shaft in deep alluvium is proposed; Then raw materials are selected according to the preparation approach, and preparation experimental study of high strength high performance concrete is conducted with C60, C65, C70and C75 , and the optimum mixture ratio is obtained, and applied to the engineering practice, achieving remarkable effect.

scholarly journals Innovative design approach of precast–prestressed girder bridges using ultra high performance concrete

2010 ◽  
Vol 37 (4) ◽  
pp. 511-521 ◽  
Author(s):  
H. Almansour ◽  
Z. Lounis
Keyword(s):  
Prestressed Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Slab ◽  
High Strength ◽  
Design Approach ◽  
Highway Bridge ◽  
Efficient Design ◽  
Ultra High Performance Concrete ◽  
Prestressed Concrete Girders

The construction of new bridges and the maintenance and renewal of aging highway bridge network using ultra high performance concrete can lead to the construction of long life bridges that will require minimum maintenance resulting in low life cycle costs. Ultra high performance concrete (UHPC) is a newly developed concrete material that provides very high strength and very low permeability to aggressive agents such as chlorides from de-icing salts or seawater. Ultra high performance concrete could enable major improvements over conventional high performance concrete (HPC) bridges in terms of structural efficiency, durability, and cost-effectiveness over the long term. A simplified design approach of concrete slab on UHPC girders bridge using the Canadian Highway Bridge Design code and the current recommendations for UHPC design is proposed. An illustrative example demonstrates that the use of UHPC in precast–prestressed concrete girders yields a more efficient design of the superstructure where considerable reduction in the number of girders and girder size when compared to conventional HPC girders bridge with the same span length. Hence, UHPC results in a significant reduction in concrete volume and then weight of the superstructure, which in turn leads to significant reduction in the dead load on the substructure, especially for the case of aging bridges, thus improving their performance.

Synthesis and Properties of Polycarboxylate-Type High Range Water-Reducer

2006 ◽  
Vol 302-303 ◽  
pp. 218-222
Author(s):  
Chong Zhi Li ◽  
Nai Qian Feng ◽  
Xian Fu Han ◽  
Lai-Jun Lu
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Molecular Design ◽  
High Strength ◽  
Vinyl Monomer ◽  
High Durability ◽  
Carboxylic Groups ◽  
Type Water ◽  
Carboxylic Esters ◽  
High Range

A series of polycarboxylate-type water-reducers (MPCs) had been developed and tested. Through molecular design, macromers of polyethylene glycol unsaturated carboxylic esters, and other derivative of unsaturated vinyl monomer containing the carboxylic groups，sulphonic groups， graft groups of alkyleneglycol was introduced as the chemical structure unit of MPCs. The copolymers MPC-2 contained long and short PEO chains and ionic groups, possessed a high dispersing and good slump retaining behavior. Therefore, MPCs can be used as high range water-reducers to prepare high-flowing concrete, high-strength high performance concrete and high-durability concrete.

High-Strength Self-Compacting Concrete and its Application in Shenzhen Mangrove Garden

2013 ◽  
Vol 438-439 ◽  
pp. 338-341
Author(s):  
Xiang Ping Xian ◽  
Wu Jian Long ◽  
Biao Yi Chen ◽  
Min Yi Huang ◽  
Yong Fa Fan
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
High Strength ◽  
Concrete Mixture ◽  
Flow Properties ◽  
Self Compacting Concrete ◽  
Concrete Mixtures ◽  
Reinforced Steel

Self-compacting concrete (SCC) refers to one kind of high-performance concrete which can fill formwork and condensed reinforced steel by the weight of concrete mixture without vibration. In this investigation, local raw materials from Shenzhen Jinqiang Concrete Co. Ltd were employed. Self-compacting concrete mixtures with targeted 3-day compressive strengths of 60MPa or 80MPa and required flow properties were evaluated. Moreover, the SCC was successfully applied in Shenzhen Mangrove Garden project.

A Local Compression Tests of UHPC Anchor Blocks for Post-Tensioning Tendons

2012 ◽  
Vol 525-526 ◽  
pp. 561-564
Author(s):  
Eun Suk Choi ◽  
Jung Woo Lee ◽  
Chang Joh ◽  
Jong Won Kwark ◽  
Jee Sang Kim ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Construction Technology ◽  
Compression Tests ◽  
Ultra High Performance Concrete ◽  
European Organization ◽  
The Matrix ◽  
Post Tensioning ◽  
Anchor Block

In the application of Ultra High Performance Concrete (UHPC) to PSC girders by using the post-tensioning system, the high strength and ductility of UHPC in tension can be exploited to substitute the confined reinforcing bars which control the rupture around the anchorage device. The exploitation of such properties is expected to simplify the reinforcing details around the anchorage zone. Taking advantage of UHPC can downsize a cross section with the attributes of high compression and tensile strength. This paper reports the local behavior of UHPC anchor block under compression. Test specimens were made based on mix proportion of K-UHPC (KICT-Ultra High Performance Concrete) developed by the Korea Institute of Construction Technology (KICT). The performance of the anchor block was evaluated according to ETAG-013 (European Technical Agreement Guide No.13) of EOTA (European Organization for Technical Approvals). As the results of the experiment, it is found that the details and reinforcement of UHPC anchorage zone can be simplified with the interconnection effect and the high intensity of the matrix itself.

Test and Application of High Performance Concrete

2014 ◽  
Vol 908 ◽  
pp. 30-33
Author(s):  
Ping Tan ◽  
Yan Min Zhao ◽  
Qiu Hong Meng
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
High Strength ◽  
High Volume ◽  
Economic Benefits ◽  
Mineral Admixtures ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Volume Stability

The durability of high performance concrete is the main index of design. design.With the high durability, the high volume stability,the high compressive strength and the good workability, high performance concrete widely used in high-rise buildings, large-span Bridges, offshore in the construction of buildings, roads, etc.This paper prepared with different water/cement ratio of high performance concrete and tested the concrete workability, mechanical properties, durability.High performance concrete need preparate with low water/cement ratio, choose high quality raw materials,adding a sufficient number of mineral admixtures and high-performance admixture. Useing the high strength and high performance concrete can decrease the size of cross section, lose weight, gain greater economic benefits.

Experimental Study on High-Performance Water-Reducing Agent in C80 Concrete

2012 ◽  
Vol 193-194 ◽  
pp. 435-439
Author(s):  
Mei Yan Hang ◽  
Ying Jing Lan ◽  
Bing Zhang ◽  
Shu Qiang Qu
Keyword(s):  
High Performance ◽  
Mechanical Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
High Strength ◽  
Reducing Agent ◽  
Mineral Admixture ◽  
Test Results ◽  
Large Numbers ◽  
The Cost

By using the High-performance water-reducing agent to do a series of technical demonstration test, and using the local raw materials, mixing with large numbers of mineral admixture, this paper makes up the cost lower C80 high strength and high performance concrete successfully. The test results show that the High-performance water-reducing agent can improve construction of concrete and physical and mechanical performance and durability after hardening

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