scholarly journals Experimental study on flexural behavior of new type of prestressed reactive powder concrete sound barrier for high‐speed rail

2020 ◽  
Author(s):  
Xia Cao ◽  
Zhen‐Xuan Yang ◽  
Wan‐Xu Zhu ◽  
Han‐Ze Peng ◽  
Feng Fu ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Speed ◽  
Flexural Behavior ◽  
Reactive Powder Concrete ◽  
High Speed Rail ◽  
Sound Barrier ◽  
New Type ◽  
Reactive Powder

Experimental Study on Mechanical Properties of Basalt Fiber Reactive Powder Concrete

2021 ◽  
Vol 1018 ◽  
pp. 163-167
Author(s):  
Cheng Fei Fan ◽  
Bu Kui Zhou ◽  
Wei Zhang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Bending Strength ◽  
Basalt Fiber ◽  
Experimental Methods ◽  
Reactive Powder Concrete ◽  
Underground Engineering ◽  
Strain Relationship ◽  
New Type ◽  
Reactive Powder

In order to meet the needs of underground engineering, a new type of basalt fiber reactive powder concrete (BFRPC) was developed in this paper. In different materials ratio, the mechanical properties of BFRPC were studied by experimental methods. And compressive strength and bending strength of BFRPC were obtained. The optimal fiber content of BFRPC was got, and the stress-strain relationship was revealed. It would lay the foundation for the application of BFRPC materials in underground engineering.

An Experimental Study About the Effects of High Speed Rail’s Construction and Operation on the Ability of These Involving Enterprises

2012 ◽  
Author(s):  
Jing Yin ◽  
Xuemei Li ◽  
Zhuxue Guo
Keyword(s):  
Experimental Study ◽  
Evaluation System ◽  
High Speed ◽  
Mutual Influence ◽  
Comprehensive Evaluation ◽  
Time Dimension ◽  
High Speed Rail ◽  
Industry Chain ◽  
Complex Processes ◽  
Previous Part

Since High-Speed Rail (HSR) began planned and constructed, many involving enterprises obtain interests from the process. But with increasing number of High-Speed railways being planned, constructed, and then operated, it will inevitably bring more improvement on the ability of these involving enterprises. So, no matter policy planers and the entrepreneurs or investors, understand the inner mechanism of the mutual influence between the development of High-Speed Rail and the improvement of involving enterprises is a key point to keep harmonious and efficient development of infrastructure construction simultaneously with the enterprises. In this paper, it is presented an example of an experimental study investigating the effects of high speed rail’s construction and operation on these involving enterprises in each link of this high speed rail industry chain. As we know, social division of labor improves the efficiency of society, and with more detailed-oriented division, more enterprises and experts are engaged in one or several domains. Thus the construction and operation of high speed way are complex processes completed by numerous enterprises, each one or some of which only need to deal with one part. By sorting the industry chain of high speed rail, 50 listed enterprises are selected with their operated data from 2006 to 2010. The comprehensive evaluation system of enterprises ability is modeled by factor analysis method to obtain the key factors, which affect the development of enterprises. The results show the ability of these enterprises are influenced by their scale, profitability, debt, operation ability and progressive ability, and the enterprises in different link own their special abilities compared with those of other links. And next, from the time dimension, the abilities of enterprises have been changed from 2006 to 2010, especially one or several abilities that summarized in the previous part. So via variance analysis, the change laws of ability are explored in the process of construction and operation of high speed rail, which, on one hand, is confirmed the promotion of high speed rails to these abilities of enterprises, on the other hand, shows the inner mechanism and rules in the process.

Analysis of the Metal Cell Board’s Design and Production of the High-Speed Rail Way

2014 ◽  
Vol 484-485 ◽  
pp. 146-150
Author(s):  
Guo Han Zhao ◽  
Shun Sheng Yang
Keyword(s):  
Production Process ◽  
High Speed ◽  
High Speed Rail ◽  
Sound Barrier ◽  
Design And Production

The cell board is an important part of the sound barrier,in the applications in high-speed rail way ,the vast majority are used metal cell board. This text brief overview the design and the production process and in order to give an available qualified products process for other projects to reference.

Mix Proportion Optimization and Shrinking of New Developed Reactive Powder Concrete

2009 ◽  
Vol 405-406 ◽  
pp. 37-43 ◽  
Author(s):  
Heng Jing Ba ◽  
Ai Li Guo ◽  
Ying Zi Yan
Keyword(s):  
Raw Materials ◽  
Steel Fibers ◽  
Reactive Powder Concrete ◽  
Particle Sizes ◽  
Heat Curing ◽  
Mix Proportion ◽  
Binder Ratio ◽  
New Type ◽  
Dry Shrinkage ◽  
Reactive Powder

According to the theory of dense packing of particle, the theoretical particle size distribution of raw materials of RPC (Reactive Powder Concrete) was calculated. On the basis, the ratio of raw materials with different range of particle sizes of the RPC was determined by mechanical experiments. According to the determined ratio, a new type RPC was prepared by using flying ash and slag to replace part of cements and quartz flour, respectively. The workability, mechanical properties of the new RPC with different mix proportion and its shrinkage, cured at the normal temperature and 60°C, respectively, were studied. The results show that when water-binder ratio is 0.23, fly ash replaces 30% cements, slag replaces 50% quartz flour and superfine steel fibers percentage in volume is 2%, the compressive and flexural strength of prepared RPC are 160.1MPa and 25.3MPa, respectively, and after 3days heat curing (60°C), the dry shrinkage of it in 28days age reaches 299um/m. In addition, the fluidity of the new RPC is 258mm and meets requirements of workability of the pump concrete.

Experimental Study on Mechanical Properties of Synthetic Macro-Fiber Reinforced Reactive Powder Concrete

2014 ◽  
Vol 496-500 ◽  
pp. 2402-2406
Author(s):  
Kui He ◽  
Hui Yang ◽  
Fang Fang Jia ◽  
Er Po Wang ◽  
Zhen Bao Lu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Compressive Strength ◽  
Fracture Mechanics ◽  
Flexural Strength ◽  
Fracture Energy ◽  
Ductile Fracture ◽  
Reactive Powder Concrete ◽  
Fiber Reinforced ◽  
Reactive Powder

Workability, strength and fracture mechanics of polypropylene macro-fiber reinforced Reactive powder concrete (RPC) were studied in this work. The results showed that the incorporation of macro-fiber could influence the workability of RPC, the slump of RPC decreased with the increasing of macro-fiber content; compressive strength decreased while splitting strength increased with the increasing of macro-fiber, meanwhile the flexural strength invariant. Macro-fiber could strongly enhance the flexural toughness of RPC and changed the failure mode from brittle to ductile; fracture energy tends to increase linearly with the increasing of macro-fiber.

Flexural behavior of sustainable reactive powder concrete bubbled slab flooring elements

2017 ◽  
Vol 3 (2) ◽  
pp. 81 ◽  
Author(s):  
Ashraf Abdulhadi Alfeehan ◽  
Hassan Issa Abdulkareem ◽  
Shahad Hameed Mutashar
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Reactive Powder Concrete ◽  
Concrete Slabs ◽  
Concrete Floor ◽  
Reinforced Concrete Slabs ◽  
Reactive Powder ◽  
Floor System

Voided slabs are reinforced concrete slabs in which voids allow to reduce the amount of concrete. The bubbled deck slab is a new and sustainable biaxial floor system to be used as a self-supporting concrete floor. The use of voided slabs leads to decrease the consumption of materials and improve the insulation properties for enhancing the objectives of sustainability. This study presents an investigation into the flexural behavior of sustainable Reactive Powder Concrete RPC bubbled slab flooring elements. Six one-way slabs were cast and tested up to the failure. The adopted variables in this study are: the volumetric ratio of steel fibers, type of slab; bubbled or solid, placing of reinforcement and thickness of slab. The effect of each variable on the ultimate load, deflection and strain has been discussed. The results show that increasing the percent of steel fibers from 1% to 2% in solid and bubbled slabs decreases the deflection by (18.75%) and (50%) respectively. As well as, the deflection increases by (41%) for bubbled slab compared to the solid slab. The slabs reinforced with top and bottom steel meshes show less deflection than slabs reinforced by only bottom steel mesh.

Sign in / Sign up

Export Citation Format

Share Document