Effect of fly ash fineness on microstructure of blended cement paste

被引：297

作者：

Chindaprasirt, Prinya

Jaturapitakkul, Chai

Sinsiri, Theerawat ^{[1
]}

机构：

[1] Suranaree Univ Technol, Inst Engn, Sch Civil Engn, Nakhon Ratchasima 30000, Thailand

[2] Khon Kaen Univ, Dept Civil Engn, Fac Engn, Khon Kaen 4002, Thailand

[3] King Mongkuts Univ Technol, Dept Civil Engn, Fac Engn, Bangkok 10140, Thailand

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2007年 / 21卷 / 07期

关键词：

fineness; fly ash; pore size; microstructure; blended cement paste;

D O I：

10.1016/j.conbuildmat.2005.12.024

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This research demonstrates the effect of fly ash fineness on pore size and microstructure of hardened blended cement pastes. Two sizes of fly ash, original fly ash and classified fly ash were used to replace Portland cement type I paste. Test results indicated that the pore sizes of hardened blended cement paste were significantly affected by the rate of replacement and the fineness of fly ash. The replacement of cement by original fly ash decreased the pore sizes of blended cement paste and the incorporation of classified fly ash resulted in a further decrease in the pore sizes of blended cement paste. The X-ray diffraction (XRD) results showed that the blended cement paste with classified fly ash was more effective at reducing the intensity of Ca(OH)(2) than that with the original fly ash. The scanning electron microscope (SEM) results revealed that the hardened blended cement paste containing finer fly ash produced a denser structure than the one containing coarser fly ash. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1534 / 1541

页数：8

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