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本论文研究了补偿收缩混凝土高温性能特征,包括残余抗压强度和氯离子渗透性能。研究结果表明,补偿收缩混凝土的高温性能与普通混凝土存在类似的规律,补偿收缩混凝土高温后残余抗压强度变化趋势与普通混凝土高温下的残余抗压强度变化趋势基本相同,残余抗压强度随温度的升高成下降趋势。400°C之后,补偿收缩混凝土抗压强度下降趋势较缓,并且在较高的温度下(600°C和800°C)保持了略微高的残余抗压强度,具体的原因以及更详细的情况有待进一步的试验验证分析。随着温度的升高,补偿收缩混凝土的氯离子电通量都呈现升高的趋势。温度升到200°C后,氯离子电通量下降幅度不大,温度升高到400°C后,补偿收缩混凝土的氯离子电通量大幅度下降。
In this paper, the high temperature performance characteristics of compensated shrinkage concrete, including residual compressive strength and chloride ion permeability were studied. The results show that the high temperature performance of shrinkage-compensated concrete is similar to that of ordinary concrete. The trend of residual compressive strength after shrinkage-compensated concrete is high is similar to that of ordinary concrete under high temperature. The residual compressive strength changes with temperature Rise to a downward trend. After 400 ° C, the compressive strength of compensated shrinkage concrete tends to decrease more slowly and a slightly higher residual compressive strength is maintained at higher temperatures (600 ° C and 800 ° C), for specific reasons and in more detail Pending further experimental verification analysis. With the increase of temperature, the chloride flux of shrinkage-compensated concrete shows an increasing trend. After the temperature rises to 200 ° C, the chloride ion flux decline is not big, when the temperature is increased to 400 ° C, the chloride ion flux of shrinkage-compensated concrete decreases greatly.