Effect of Moisture Content on the Behavior of High Strength Concrete at High Temperatures

被引：0

作者：

Kirchhof, Larissa Degliuomini ^{[1
]}

Antocheves de Lima, Rogerio Canaan ^{[1
]}

da Silva Santos Neto, Almir Barros ^{[1
]}

Quispe, Alana Costa ^{[1
]}

da Silva Filho, Luiz Carlos Pinto ^{[2
]}

机构：

[1] Univ Fed Santa Maria, Programa Posgrad Engn Civil PPGEC, Santa Maria, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Programa Posgrad Engn Civil PPGEC, Porto Alegre, RS, Brazil

来源：

MATERIA-RIO DE JANEIRO | 2020年 / 25卷 / 01期

关键词：

high temperature; fire; concrete; moisture; spalling; HIGH-PERFORMANCE CONCRETE; FIRE-DAMAGED CONCRETE; MECHANICAL-PROPERTIES; POLYPROPYLENE FIBERS; HPC;

D O I：

10.1590/S1517-707620200001.0898

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, an experimental program was carried out to investigate the residual mechanical properties of high strength concrete and normal strength concrete, and how moisture content and temperature affect the spalling process. Three mixtures with water-cementitious material ratios, from 0.25 to 0.50, and with different saturation levels were heated in an electric furnace to elevated temperatures, from 200 degrees C to 600 degrees C. After heating, the specimens were cooled down to room temperature and then tested for compression and tensile strength. The results showed that high moisture content induces the spalling process and reduces considerably the mechanical properties of high strength concrete, mainly at temperatures above 400 degrees C.

引用

页数：9

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