邱玉深
对混凝土养护方法的思考与建议
邱玉深
摘 要:由于水泥和混凝土技术的发展和进步,有些传统的养护方法现已不能完全适用或部分不能适用。混凝土的开始浇水保湿时间应予提前,应做“尽早及时”,养护保湿持续时间应做到“足够和适可而止”;养护过程中,为保证混凝土结构断面上的温度梯度、升温速率、降温速率适宜及具有较小的最高温度和致裂温度,应在混凝土于半流动状态及塑性阶段实施冷却处理,而在最高温度时加以覆盖并开始保温,并于硬化开始至最高温度到达之间注意防止“热震”的发生。
Abstract: Owing to the development and progress of cement and concrete technology, some traditional curing methods, especially for its regime, aren't suitable completely or partly. Author considers that, the beginning time of watering the concrete for keeping moisture should be advanced as early as possible. And the duration time for watering should be enough, but must stop just at time and not going too long. During the curing process, for the concrete structure section, in order to keep the temperature gradient, their rising rate and cooling rate in a suitable value and the maximum temperature and cracking temperature in a smaller value, the cooling measures should be taken when the concrete is in the semi-flow state and plastic stage. And the concrete should be covered for insulation at the time of maximum temperature and begin to preserve from thermal loss. Pay attention to avoid the “thermal shock” between the time at the beginning of harden and at the occurence of maximum temperature.
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