Paper Title:
Experiment and Mechanism Study on Effect of Water/Binder and Fly Ash on Mechanical Properties of HPC
  Abstract

It takes on the technical and economic double benefits that fly ash taking the place of cement. However, water/binder of modern concrete is generally low; the research on the concrete performance which is based on large water/binder is no longer suitable for analysis of modern concrete. As to this problem, using different proportions of W/B and FA dosage as influencing factors, specimen is compounded for the compressive strength test. Then, mechanical properties of HPC are studied systematically. Based on this, macro-performance is analyzed from a micro-mechanism point of view through taking the electron micrograph. As the study shows, strength of HPC mixed with fly ash has low characteristics at early period while high ones at later period. At later hydration, fly ash effect plays a significant role, the growth rate of concrete strength increases as the increase of FA dosage. Compressive strength of concrete decreases as the increase of W/B and FA dosage. When the W/B is high, compressive strength is not sensitive to the change of W/B and FA dosage; but when the W/B decreases from 0.30 to 0.25, the concrete strength transition occurs. The influence of W/B on concrete compressive strength is more significant than that of the FA dosage; in the preparation of HPC, fly ash can be added more and cement is added less relatively by decreasing the W/B, displaying the role of micro-aggregate filling and modification, improving the strength and other performance of concrete. The study on micro-mechanism proves well the macro-phenomena above.

  Info
Periodical
Advanced Materials Research (Volumes 255-260)
Edited by
Jingying Zhao
Pages
3404-3410
DOI
10.4028/www.scientific.net/AMR.255-260.3404
Citation
S. X. Li, A. Q. Xu, X. J. Tang, Q. Hu, "Experiment and Mechanism Study on Effect of Water/Binder and Fly Ash on Mechanical Properties of HPC", Advanced Materials Research, Vols. 255-260, pp. 3404-3410, 2011
Online since
May 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zhi Min He, Jun Zhe Liu, Tian Hong Wang
Abstract:In precast concrete elements manufacturing, steam-cured concrete incorprating 30% mineral admixtures encountered the problem of too low...
1535
Authors: Jian Hua Wu, Yun Lan Liu
Abstract:This paper studies the influence of different mineral admixtures(fly ash and ground granulated blast furnace slag)on the carbonation...
366
Authors: Guang Ri Luan, Lian Jun Wang, Yi Li
Chapter 1: Road and Railway Engineering
Abstract:In this paper, the influence of compound mineral admixture on cement mortar’s performance is studied. The optimum compound proportion of...
373
Authors: Rui Gang Wang
Chapter 1: Material Science and Engineering
Abstract:The activate effect of various activator on fly ash was studied according to the comparative tests of cement strength. The result shows that...
52
Authors: Xue Song Zhang
Chapter 7: Building Materials
Abstract:Based on the mechanism of concrete carbonation, the effects of content of fly ash in the binder, the water to binder ratios, compound...
1688