Influence of the microsilica state on pozzolanic reaction rate

被引：59

作者：

de Rojas, MIS ^{[1
]}

Rivera, J ^{[1
]}

Frías, M ^{[1
]}

机构：

[1] CSIC, Inst CC Eduardo Torroja, Madrid 28033, Spain

来源：

CEMENT AND CONCRETE RESEARCH | 1999年 / 29卷 / 06期

关键词：

hydration; heat of hydration; pozzolanic activity; silica fume; mortar;

D O I：

10.1016/S0008-8846(99)00085-X

中图分类号：

TU [建筑科学];

学科分类号：

0813 [建筑学];

摘要：

Silica fume is generally supplied as an ultrafine powder in its original slate, densified or in suspension. The difference in slates should not influence the pozzolanic behaviour of this by-product in a cementitious matrix. In the present work, experimental results relating to pozzolanic reaction have been obtained by different methods: a chemical method, in which lime fixed by pozzolanic material through time is quantified, and a physicochemical method based on the Langavant calorimeter. By the second method, information regarding silica fume is obtained from the value of heat of hydration released by a mortar containing this by-product. These results show that the silica fume in its densified state considerably decreases its chemical reactivity with calcium hydroxide (pozzolanic activity). (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：945 / 949

页数：5

共 14 条

[1]

[Anonymous], REV MATERIAUX

[2]

[Anonymous], 7 INT C CHEM CEM PAR

[3]

[Anonymous], REV MATERIAUX

[4]

CALLEJA J, 1969, ION, P623

[5]

The pozzolanic activity of different materials, its influence on the hydration heat in mortars [J].

deRojas, MIS ;

Frias, M .

CEMENT AND CONCRETE RESEARCH, 1996, 26 (02) :203-213

[6]

DEROJAS MIS, 1993, CEMENT CONCRETE RES, V23, P46

[7]

DEROJAS MIS, 1995, 5 CANMET ACI INT C F, V2, P829

[8]

Luxan M.P., 1985, MATERIALES CONSTRUCC, V35, P3, DOI 10.3989/mc.1985.v35.i200.904

[9]

*NORM UN, 1996, 80301 NORM UN

[10]

*NORM UN, 1986, 80118 NORM UN

← 1 2 →