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.

Microstructure and X-Ray Diffraction Analysis of Aluminum-Fly Ash Composites Produced by Compocasting Method

2019 ◽  
Vol 49 (2) ◽  
pp. 20170609
Author(s):  
M. N. Ervina Efzan ◽  
N. Siti Syazwani ◽  
A. M. Mustafa Al Bakri ◽  
Wai Liew Kia
Keyword(s):  
Fly Ash ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

Effects of Fly Ash Particle Sizes on the Compressive Strength and Fracture Toughness of High Performance Concrete

2011 ◽  
Vol 284-286 ◽  
pp. 984-988
Author(s):  
An Shun Cheng ◽  
Yue Lin Huang ◽  
Chung Ho Huang ◽  
Tsong Yen
Keyword(s):  
Fracture Toughness ◽  
Particle Size ◽  
Compressive Strength ◽  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Bending Test ◽  
Strength Development ◽  
Particle Sizes

The study aims to research the effect of the particle size of fly ash on the compressive strength and fracture toughness of high performance concrete (HPC). In all HPC mixtures, the water-to-binder ratio selected is 0.35; the cement replacement ratios includes 0%, 10% and 20%; the particle sizes of fly ash have three types of passing through sieves No. 175, No. 250 and No. 325. Three-point-bending test was adopted to measure the load-deflection relations and the maximum loads to determine the fracture energy (GF) and the critical stress intensity factor (KSIC). Test results show that adding fly ash in HPC apparently enhances the late age strengths of HPC either for replacement ratio of 10% or 20%, in which the concrete with 10% fly ash shows the higher effect. In addition, the smaller the particle size is the better the late age concrete strength will be. The HPC with the finer fly ash can have higher strength development and the values of GF and KSIC due to the facts of better filling effect and pozzolanic reaction. At late age, the GF and KSIC values of concrete with 10% fly ash are all higher than those with 20% fly ash.

Experimental Analysis of Shot Peening on Carburized or Carbonitrided Parts

2011 ◽  
Vol 681 ◽  
pp. 273-277 ◽  
Author(s):  
Pierre Renaud ◽  
Philippe Bristiel ◽  
Laurent Barrallier ◽  
Marc Desvignes ◽  
Regis Kubler
Keyword(s):  
Experimental Study ◽  
Residual Stresses ◽  
Diffraction Analysis ◽  
Experimental Analysis ◽  
Shot Peening ◽  
Hardness Measurement ◽  
Optical Observations ◽  
Experimental Investigations ◽  
X Ray Diffraction ◽  
X Ray

This experimental study focuses on the influence of shot peening on parts initially treated by carburizing or carbonitriding. Experimental investigations have been carried out: optical observations of the microstructures, in-depth hardness measurement, X-ray diffraction analysis of residual stresses. A comparison is made between the carburizing anad the carbonitriding treatments.

X-ray Diffraction Analysis of Fly Ash. II. Results

1990 ◽  
Vol 34 ◽  
pp. 387-394 ◽  
Author(s):  
G. J. McCarthy ◽  
J. K. Solem
Keyword(s):  
Fly Ash ◽  
Diffraction Analysis ◽  
Chemical Constituents ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Power Station ◽  
Crystalline Phases ◽  
X Ray ◽  
High Calcium

AbstractA protocol for semi-quantitative XRD analysis of fly ash has been applied to 178 ashes in studies of the typical mineralogy of high-calcium and iow-calcium fly ash, the consistency of fly ash mineralogy from a typical power station, the partitioning of chemical constituents into crystalline phases, and the crystalline phases relevant to the use of fly ash in concrete.

Synchrotron radiation in situ X-ray absorption fine structure and in situ X-ray diffraction analysis of a high-performance cobalt catalyst towards the oxygen reduction reaction

2017 ◽  
Vol 19 (45) ◽  
pp. 30749-30755
Author(s):  
Haiying Qin ◽  
Longxia Lin ◽  
Junkang Jia ◽  
Huangliang Ni ◽  
Yan He ◽  
...  
Keyword(s):  
Fine Structure ◽  
Synchrotron Radiation ◽  
Diffraction Analysis ◽  
High Performance ◽  
Cobalt Catalyst ◽  
Reduction Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption

The evolution of metallic Co to Co(OH)2 and then to CoOOH during the ORR was revealed by in situ XRD combined with in situ XAFS tests.

Semi-Quantitative X-Ray Diffraction Analysis of Fly Ash by the Reference Intensity Ratio Method

1988 ◽  
Vol 136 ◽  
Author(s):  
Gregory J. McCarthy ◽  
A. Thedchanamoorthy
Keyword(s):  
Fly Ash ◽  
Diffraction Analysis ◽  
Intensity Ratio ◽  
Bituminous Coal ◽  
Low Rank ◽  
Standard Reference Materials ◽  
Ratio Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Common

ABSTRACTA protocol for relatively inexpensive and rapid semi-quantitative x-ray diffraction analysis of fly ash mineralogy by the Reference Intensity Ratio (RIR) method is described. RIR's for the common crystalline phases in fly ashes derived from low rank and bituminous coal are given. The method is semi-quantitative for some phases because of unavoidable overlaps of the stronger peaks suitable for quantitation. Use of the protocol is illustrated with the four fly ash Standard Reference Materials supplied by the National Institute of Standards and Technology. Recommendations for implementation of this protocol in other laboratories and for improvements in quantitation of fly ash mineralogy are given.

Research on Strength Control and Evaluation of Fly Ash Concrete

2012 ◽  
Vol 450-451 ◽  
pp. 800-804
Author(s):  
Hui Niu
Keyword(s):  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Performance Model ◽  
Treatment Technology ◽  
Main Research ◽  
Fly Ash Concrete ◽  
Non Linear ◽  
Artificial Neural

This manuscript makes experiments on the relation between each index and fly-ash concrete strength, such as W/B, Sa, S/A and so on. At the same time we applicate artificial neural networks into HPFC The main research is on the relationship between component material and performance of the high-performance fly ash concrete, and also on the fly ash high-performance concrete quality control system and method, which promotes fly ash in foundation and basement construction engineering application. This text introduces the treatment technology of the non-linear artificial neural network, utilizing mixing ratio of existing concrete (import) and data as the performance index (output) to train the network, setting up concrete to non-linear import--Output mode relation, constructing concrete performance model, promoting prediction precision of concrete performance further.

Technical Research on Quality Control of Fly Ash Concrete

2011 ◽  
Vol 230-232 ◽  
pp. 592-595
Author(s):  
Hui Niu
Keyword(s):  
Quality Control ◽  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Good Effect ◽  
Engineering Practice ◽  
Optimal Dosage ◽  
Total Quality ◽  
Fly Ash Concrete

Based on comprehensive quality management theory, we have studied quality factors of fly ash high-performance concrete in construction, put forward the method of beforehand control, course control and afterwards control. From the project construction of the actual conditions, the raw material selection, mixture design and try gradation and concrete performance of fly ash concrete, has been comprehensively studied and analysised. The optimal dosage of fly ash has been determined with good workability of different fly ash concrete strength grade and mechanical properties meeting the design requirements and good durability, which demonstrates the good effect of the high-performance concrete implementation of total quality control management through the engineering practice.

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