通过纳米聚合物对轻质砂浆进行表面改性以提高其防水性和耐久性。

Surface Modification of Lightweight Mortars by Nanopolymers to Improve Their Water-Repellency and Durability.

作者信息

Szafraniec Małgorzata, Barnat-Hunek Danuta, Grzegorczyk-Frańczak Małgorzata, Trochonowicz Maciej

机构信息

Faculty of Civil Engineering and Architecture, Lublin University of Technology, ul. Nadbystrzycka 40, 20-618 Lublin, Poland.

出版信息

Materials (Basel). 2020 Mar 17;13(6):1350. doi: 10.3390/ma13061350.

DOI:10.3390/ma13061350

PMID:32192021

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7143614/

Abstract

The paper explores the possibility of covering the mortar with the lightweight aggregate by the nanopolymer silane and siloxane as surface hydrophobisation. The investigation involved the mortars with two types of hydrophobic agents diluted with water in a ratio of 1:4 and 1:8. Mortar wetting properties were determined by measuring the absorbability, water vapor diffusion, contact angle (CA) and surface free energy (SFE) of their structure. Surface micro-roughness and 2D topography were evaluated. Scanning electron microscopy (SEM) has shown the microstructure and distribution of pores in mortars. The reduction in absorbency after the first day of testing by 87% was shown. An improvement in frost resistance after 25 cycles by 97% and an 18-fold decrease in weight loss after the sulphate crystallization test were observed. The hydrophobic coating reduces the SFE of mortars and increases the CA. In the case of using silanes, a 9-fold increase CA was observed.

摘要

本文探讨了通过纳米聚合物硅烷和硅氧烷对轻质集料覆盖灰浆进行表面疏水化处理的可能性。研究涉及两种以1:4和1:8的比例用水稀释的疏水剂的灰浆。通过测量灰浆结构的吸水性、水蒸气扩散、接触角（CA）和表面自由能（SFE）来确定灰浆的润湿性。评估了表面微观粗糙度和二维形貌。扫描电子显微镜（SEM）显示了灰浆中孔隙的微观结构和分布。测试第一天后吸水性降低了87%。观察到经过25次循环后抗冻性提高了97%，硫酸盐结晶试验后重量损失降低了18倍。疏水涂层降低了灰浆的SFE并增加了CA。在使用硅烷的情况下，观察到CA增加了9倍。