Microstructural response of polypropylene fibres at high temperature to protect concrete from spalling

被引：2
作者：
Alonso, M. C. [1 ]
Flor-Laguna, V. [1 ]
Sanchez, M. [1 ]
机构：
[1] IETcc CSIC, Inst Construct Sci Eduardo Torroja, Madrid, Spain
来源：
CONCRETE SPALLING DUE TO FIRE EXPOSURE: PROCEEDINGS OF THE 3RD INTERNATIONAL WORKSHOP | 2013年 / 6卷
关键词：
HIGH-STRENGTH CONCRETE; PERFORMANCE; BEHAVIOR;
D O I：
10.1051/matecconf/20130602001
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The microstructural analysis of the interfacial transition zone (ITZ) and the interaction of polypropylene fibres (PPF) with mortar in the temperature region 170 to 300. C have been considered. The results confirm a mixed mechanism: The presence of the PPF alters the ITZ and favours an initial cracking formation. After melting, PPF diffuses in the surrounding cement paste closing micropores while, simultaneously, macro pores are increased as consequence of the free space leaved and the growing of microcracks.
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页数：7
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