CAJ | 학술논문

为了控制大体积混凝土的水化热温度,对控制混凝土早期裂缝提供依据,了解温度对混凝土早期力学性能的影响,采用镍铬-镍硅型热电偶传感器对混凝土内部温度场进行了实测.结果表明,混凝土浇筑初期内部温度场沿深度呈抛物线分布,最高温度为58℃,在浇筑后3 d出现,持续1 d左右,混凝土中心与表面最大温差19℃.通过实测的温度场分布情况,可以直接了解混凝土内部温度变化趋势,对控制水化热温度和温度裂缝起指导作用.
위료공제대체적혼응토적수화열온도,대공제혼응토조기렬봉제공의거,료해온도대혼응토조기역학성능적영향,채용얼락-얼규형열전우전감기대혼응토내부온도장진행료실측.결과표명,혼응토요축초기내부온도장연심도정포물선분포,최고온도위58℃,재요축후3 d출현,지속1 d좌우,혼응토중심여표면최대온차19℃.통과실측적온도장분포정황,가이직접료해혼응토내부온도변화추세,대공제수화열온도화온도렬봉기지도작용.
In order to control the temperature of hydration heat in mass concrete,provide a basis for preventing temperature crack and find out the temperature＇s influence on mechanical property in early-age concrete,the nickel silicon-nickel chrome thermocouple transducers were used to measure the thermal field in concrete.The results showed that the temperature curve in early-age concrete looks like a parabola.The temperature peak was 58 ℃ which lasted about one day.It appeared in 3 days after concreting.The maximum of temperature difference between the center and surface was 19 ℃.From the measured thermal field,the temperature change in concrete could be seen directly.The conclusion would be a guide to temperature control of hydration heat and crack prevention.