The characteristics of air void and frost resistance of RCC with fly ash and expansive agent

被引：63

作者：

Gao, Pei-wei ^{[1
]}

Wu, Sheng-xing

Lin, Ping-hua

Wu, Zhong-ru

Tang, Ming-shu

机构：

[1] Hohai Univ, Nanjing 210098, Peoples R China

[2] Nanjing Univ Technol, Nanjing 210009, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2006年 / 20卷 / 08期

关键词：

RCC; the air void spacing factor; expansive agent; freezing-thawing cycle;

D O I：

10.1016/j.conbuildmat.2005.01.039

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In order to assure the outer concrete of Longtan dam in China possesses excellent of frost resistance, the losses of strength, mass and air void characteristics of roller compacted concrete (RCC) containing fly ash, superplasticizer and a novel MgO-bearing expansive agent (HNM) were studied using the freezing-thawing method ASTM C666. The results show that there is a linear correlation between strength and mass losses in RCC subjected to cycles of freezing and thawing. There is a relationship between the air void spacing factor and the frost resistance of RCC. However, for RCC containing fly ash and superplasticizer a spacing factor of 0.25 mm is not necessary. Using a water:binder ratio of 0.48 in RCC containing 50% fly ash and 8% HNM a durability factor of over D-300 can be achieved provided the spacing factor is less than 0.4 mm. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：586 / 590

页数：5

共 10 条

[1]

DOLEN TP, 1991, FREEZING THAWING DUR, P101

[2]

Ghosh R.S., 1979, CEMENT CONCRETE AGGR, V1, P56

[3]

HANDONG Y, 2001, IND CONSTRUCTION, V31, P46

[4]

MICHEL P, 1996, CONCRETE INT, V6, P22

[5]

PIGEON M, 1991, CEMENT CONCRETE RES, V21, P400

[6]

Powers T.C., 1975, FREEZING EFFECTS CON

[7]

POWERS TC, 1954, J ACI, P50

[8]

POWERS TC, 1949, P HIGHW RES BOARD, P29

[9]

RAGAN SA, 1986, SL8616 US ARM CORPS

[10]

SCHREIBER EA, 1989, NATL GEOGR RES, V5, P64

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