【摘 要】
：
Recently, fire resistant cementitious materials are requested to deal with a fire broken out relatively so high fiequency in tunnels caused by traffic accidents.In this concept, Portland cements mater
【机 构】
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Department of Civil and Environmental Engineering, National Institute of Technology,Oita College, Oi
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Recently, fire resistant cementitious materials are requested to deal with a fire broken out relatively so high fiequency in tunnels caused by traffic accidents.In this concept, Portland cements materials are inadequate,because they are not fire resistant and the limit of fire resistance is only 400℃.Namely, the hydrates lose almost the combined water until 400℃ is reached and the strength becomes weakened so abruptly over 400℃ temperature.Geopolymer materials are suitable to this objective, because they are fire resistant.The temperature limit is generally 1000℃ and the resistance of potassium silicates binders is somewhat higher than that of sodium silicate binders.
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