Study of the pozzolanic reaction kinetics in sugar cane bagasse-clay ash/calcium hydroxide system: kinetic parameters and pozzolanic activity

被引：22
|
作者：
Villar-Cocina, E. [1 ]
Frias Rojas, M. [2 ]
Valencia Morales, E. [1 ]
Savastano, H., Jr. [3 ]
机构：
[1] Cent Univ Las Villas, Dept Phys, Santa Clara 54830, Villa Clara, Cuba
[2] CSIC, Eduardo Torroja Inst, Madrid 28033, Spain
[3] Univ Sao Paulo, FZEA, Sao Paulo, Brazil
来源：
ADVANCES IN CEMENT RESEARCH | 2009年 / 21卷 / 01期
关键词：
FLY-ASH; HYDROTHERMAL REACTION; METAKAOLIN; HYDRATION; LIME; ACTIVATION; INCINERATION; TEMPERATURE; CONCRETE; PASTES;
D O I：
10.1680/adcr.2007.00042
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper presents a study of the pozzolanic reaction kinetics between calcium hydroxide and a mixture of sugar cane bagasse with 20 and 30% of clay, burned at 800 and 1000 degrees C (SCBCA) by electrical conductivity measurements. A kinetic-diffusive model produced in previous studies by some of the authors was used. The model was fitted to the experimental data, which allowed the computation of the kinetic parameters of the pozzolanic reaction (reaction rate constant and free energy of activation) that rigorously characterised the pozzolanic activity of the materials. The results show that SCBCA demonstrated reactivity and good pozzolanic qualities in the range 800-1000 degrees C.
引用
收藏
页码：23 / 30
页数：8
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