Sarcinella Antonella, Cunha Sandra, Reis Nuno, Aguiar José, Frigione Mariaenrica
Innovation Engineering Department, University of Salento, Prov. le Lecce-Monteroni, 73100 Lecce, Italy.
Centre for Territory, Environment and Construction (CTAC), Department of Civil Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
Materials (Basel). 2024 Jul 27;17(15):3731. doi: 10.3390/ma17153731.
The development of construction materials with the integration of phase change materials (PCMs) has been a topic of wide interest in the scientific community, especially in recent years, due to its positive impact on temperature regulation inside buildings. However, little is known about the behavior of materials doped with PCMs when exposed to accidental or severe environments. Currently, a large area of the planet experiences seasonal freeze-thaw effects, which impact the durability and performance of construction materials. Accordingly, the main objective of this study was to evaluate the damage caused by cyclic freeze-thaw actions on the behavior of a cement mortar, including a PEG-based form-stable PCM. An experimental methodology was developed based on the physical and mechanical characterization of mortars under normal operating conditions and after being subjected to freeze-thaw cycles. The results indicated that, under normal exposure conditions, the incorporation of aggregate functionalized with PCM led to a decrease in the mortar's water absorption capacity, compressive strength, and adhesion. However, its applicability has not been compromised. Exposure to freeze-thaw cycles caused a loss of mass in the specimens and a decrease in the compressive strength and adhesion capability of the mortar.
将相变材料（PCM）集成到建筑材料中的开发一直是科学界广泛关注的话题，特别是近年来，因为它对建筑物内部的温度调节有积极影响。然而，对于掺杂PCM的材料在暴露于意外或恶劣环境时的行为知之甚少。目前，地球上很大一部分地区经历季节性冻融效应，这会影响建筑材料的耐久性和性能。因此，本研究的主要目的是评估循环冻融作用对包括基于聚乙二醇的定形相变材料的水泥砂浆性能造成的损害。基于在正常操作条件下以及经受冻融循环后对砂浆的物理和力学特性，开发了一种实验方法。结果表明，在正常暴露条件下，掺入用PCM功能化的骨料会导致砂浆的吸水能力、抗压强度和粘结力下降。然而，其适用性并未受到损害。暴露于冻融循环会导致试样质量损失以及砂浆的抗压强度和粘结能力下降。
