【摘要】 本文利用超声—回弹综合法和标准抗压强度试验研究了经不同时间加热并自然冷却的混凝土，分析了检测方法与试验值之间的关系，探讨了混凝土强度与高温持续时间的变化规律。更多还原

【Abstract】 This paper uses the comprehensive method of sup ersonics and bounce and standard compressive strength test to deal with concrete heated with different time and after natural cooling,analyzes the relationship between the method and the test value,discusses the regularity of Concrete stre ngth and duration of high temperature.更多还原