During the construction of lightweight cellular concrete (LCC), material damage frequently occurs, causing the degradation and deterioration of the mechanical performance, durability, and subgrade quality of LCC. The construction-induced damage can be more significant than those from the service environment of LCC, such as freeze-thaw (F—T) action in cold regions. However, the effect of construction-induced damage on LCC during F—T cycles is often ignored and the deterioration mechanisms are not yet clarified. In this study, we investigated the factors causing damage during construction using a sample preparation method established to simulate the damage in the laboratory setting. We conducted F—T cycle tests and microstructural characterization to study the effect of microstructural damage on the overall strength of LCC with different water contents under F—T actions. We established the relationship between the pore-area ratio and F—T cycle times, pore-area ratio, and strength, as well as the F—T cycle times and strength under different damage forms. The damage evolution is provided with the rationality of the damage equation, verified by comparing the measured and predicted damage variables. This study would serve as a guide for the construction and performance of LCC in cold regions.

轻质蜂窝混凝土（LCC）在施工过程中，经常发生材料损伤，导致LCC的力学性能、耐久性和路基质量退化和劣化。施工引起的损坏可能比LCC使用环境造成的损坏更显着，例如寒冷地区的冻融（FT）作用。然而，FT-T循环过程中施工引起的损坏对LCC的影响往往被忽视，其劣化机制尚未阐明。在这项研究中，我们使用模拟实验室环境中的损坏而建立的样品制备方法研究了在施工过程中造成损坏的因素。我们进行了 FT 循环试验和微观结构表征，以研究微观结构损伤对不同含水量 LCC 在 FT 作用下的整体强度的影响。我们建立了孔面积比与FT循环次数、孔面积比和强度之间的关系，以及不同损伤形式下FT循环次数和强度之间的关系。损伤演化提供了损伤方程的合理性，通过比较测量和预测的损伤变量来验证。该研究将为寒冷地区 LCC 的建设和性能提供指导。损伤演化提供了损伤方程的合理性，通过比较测量和预测的损伤变量来验证。该研究将为寒冷地区 LCC 的建设和性能提供指导。损伤演化提供了损伤方程的合理性，通过比较测量和预测的损伤变量来验证。该研究将为寒冷地区 LCC 的建设和性能提供指导。