寒冷地区龄期及温度对混凝土强度影响的研究

Analysis on Effect of Age and Temperature on Concrete Strength in Cold Area

摘要:

重点探讨混凝土在冬季建筑温度条件下，其强度与温度、龄期等因素之间的相互关系。通过对自然环境条件、龄期设定以及抗压性能指标的评估和检验。在低温条件下，设计不同养护方式和养护时间，重点模拟冬季低温自然养护等不利养护条件，尽可能真实的反映出工程现场实际养护情况，通过对自然环境温度和同种养护条件下混凝土试件内部温度的观测，对其进行室内不同养护方式和龄期的抗压强度试验，得到周期内的混凝土抗压强度值。在确定的低温条件下，得出养护龄期对混凝土抗压强度的影响以及试件内外部温度的变化规律。

Abstract:

The emphasis is to discuss the interrelation between the strength and temperature, age and other factors of concrete under the condition of construction temperature in winter. Through the evaluation and examination of the natural environment condition, the age setting and the compression resistance index, the different curing methods and curing time are designed for the low-temperature condition to simulate the low-temperature natural curing and other adverse curing conditions in winter, which reflect the practical curing state of project site as realistically as possible. Through the observation of internal temperature of the concrete specimen under the natural environment temperature and the same curing condition, the compressive strength of the concrete specimen under the different indoor curing methods and ages is tested, and the compressive strength value of concrete in the period is obtained. Under the condition of determined low temperature, the influence of curing age on the compressive strength of concrete and the change rule of the temperature inside and outside of the specimen are determined, and the reference is provided.