Experimental study on durability characteristics of composite fiber reinforced high-performance concrete incorporating nanosilica and ultra fine fly ash

2020 ◽  
Vol 262 ◽  
pp. 120738
Author(s):  
H.M. Sujay ◽  
Nishant A. Nair ◽  
H. Sudarsana Rao ◽  
V. Sairam
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Composite Fiber ◽  
Fiber Reinforced

scholarly journals Dynamic Stress-Strain Behaviour of Steel Fiber Reinforced High-Performance Concrete with Fly Ash

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Tan Chien Yet ◽  
R. Hamid ◽  
Mudiono Kasmuri
Keyword(s):  
Fly Ash ◽  
Strain Rate ◽  
High Performance ◽  
Steel Fiber ◽  
High Performance Concrete ◽  
Steel Fibers ◽  
Engineering Properties ◽  
Fiber Reinforced ◽  
Dynamic Impact ◽  
Static Compression

The addition of steel fibers into concrete mix can significantly improve the engineering properties of concrete. The mechanical behaviors of steel fiber reinforced high-performance concrete with fly ash (SFRHPFAC) are studied in this paper through both static compression test and dynamic impact test. Cylindrical and cube specimens with three volume fractions of end-hooked steel fibers with volume fraction of 0.5%, 1.0%, and 1.5% (39.25, 78.50, and 117.75 kg/m3) and aspect ratio of 64 are used. These specimens are then tested for static compression and for dynamic impact by split Hopkinson pressure bar (SHPB) at strain rate of 30–60 s−1. The results reveal that the failure mode of concrete considerably changes from brittle to ductile with the addition of steel fibers. The plain concrete may fail under low-strain-rate single impact whereas the fibrous concrete can resist impact at high strain rate loading. It is shown that strain rate has great influence on concrete strength. Besides, toughness energy is proportional to the fiber content in both static and dynamic compressions.

Experimental Study on Growth Mechanism of Green High Performance Concrete Strength

2011 ◽  
Vol 71-78 ◽  
pp. 229-241
Author(s):  
Shi Qi Cui ◽  
Xu Wen Kong ◽  
Can Dong ◽  
Feng Chuan Gu ◽  
Hong Di Lv
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
Diffraction Analysis ◽  
Growth Mechanism ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mineral Powder

Using SEM observation and X-ray diffraction analysis, explore the growth mechanism of green high performance concrete strength, study the microstructure of green high performance concrete as well as the species and state of products, to prove fly ash, mineral powder and additive can greatly enhance the strength, density and durability of concrete, and finally make low-strength concrete satisfy the need of green high performance.

An Experimental Study on the Frost Resistance of High Performance Concrete Using Fly-Ash and Agent

2017 ◽  
Vol 904 ◽  
pp. 179-184
Author(s):  
Seung Jo Lee
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Fly Ash ◽  
Modulus Of Elasticity ◽  
Dynamic Modulus ◽  
Frost Resistance ◽  
High Performance ◽  
High Performance Concrete ◽  
Strength Increase ◽  
Freeze Thaw

The purpose of this study is to investigate the freeze-thaw resistance, one of the most important durability indicators, of high-performance concrete made of fibers (nylon and polypropylene), AE agent, viscosity agent, and fly ash, an industrial by-product. While FN-1 showed the best freeze-thaw resistance with an about 2.8% relative dynamic modulus of elasticity, PV-2 showed the worst results, with an about 7.4% modulus, in comparison tests with GC. Most of the test samples showed better compressive strength than GC. Especially, N-1 showed the greatest compressive strength increase of 8%. Also, the test samples mixed with FA and PP showed a 2-4% compressive strength increase effect.

Experimental Study on Slag-Based Composite Admixture

2012 ◽  
Vol 174-177 ◽  
pp. 354-357
Author(s):  
Ri Hua Zhang ◽  
Xian Jun Guo
Keyword(s):  
Experimental Study ◽  
Composite Materials ◽  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Service Performance ◽  
Raw Material ◽  
Advantages And Disadvantages ◽  
Construction Property ◽  
New Material

Admixture is a new material used for high-performance concrete. It is mainly used to improve the construction property and service performance and the durability of the concrete. At present, admixture is mainly made of a single component such as the slag, fly ash, silica fume, or mixed with a small amount of plaster. Different admixtures have different effects on the concrete and they have both advantages and disadvantages separately. Based on the principle of “Strength Synergistic Effect” of the composite materials, if the different kinds of admixtures are mixed into the concrete with suitable proportion, the advantages can be developed and the disadvantages will be avoided. In this study, the wide sources of admixtures such as slag, fly ash and limestone are used in the composite tests to develop a new kind of composite admixture which uses the slag as main raw material and has better performance.

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