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回收工业废料作为建筑用环氧热固性塑料中的填料

Recovery of Industrial Wastes as Fillers in the Epoxy Thermosets for Building Application.

作者信息

Hodul Jakub, Mészárosová Lenka, Drochytka Rostislav

机构信息

Department of Technology of Building Materials and Components, Faculty of Civil Engineering, Brno University of Technology, Veveří 331/95, 602 00 Brno, Czech Republic.

出版信息

Materials (Basel). 2021 Jun 23;14(13):3490. doi: 10.3390/ma14133490.

DOI:10.3390/ma14133490
PMID:34201598
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8269562/
Abstract

Epoxy resins are currently used in many areas of construction, such as resistant coatings, anchors, fibre-reinforced polymer (FRP) composites, grouts, etc. This paper deals mainly with epoxy composites that can be applied during the rehabilitation of concrete constructions. The influence of a filler type on epoxy thermoset composites was monitored, whilst three different types of epoxy resin were used in order to achieve a better representation and confirmation of the results. During the testing of fillers, these were mainly secondary raw materials, including pre-treated hazardous waste (neutralisation sludge), representing various shapes and sizes of particle, while their amount in the epoxy matrix was chosen with regard to optimal viscosity and workability. Physical and mechanical parameters, like compressive and flexural strengths, cohesion with the concrete and thermal expansion of the epoxy composites containing various fillers were determined. The microstructure of epoxy composites with a different filler type and chemical resistance against chemical aggressive media were all monitored. The microstructure of epoxy composites was monitored using scanning electron microscopy (SEM) supported by energy-dispersive X-ray spectroscopy (EDX). Computed tomography (CT) was also used for the evaluation of the cohesion of the epoxy composites with concrete and dispersion of the filler in the epoxy matrix.

摘要

环氧树脂目前应用于建筑的许多领域，如防腐涂料、锚栓、纤维增强聚合物（FRP）复合材料、灌浆料等。本文主要探讨可用于混凝土结构修复的环氧复合材料。监测了填料类型对环氧热固性复合材料的影响，同时使用了三种不同类型的环氧树脂，以便更好地呈现和验证结果。在填料测试过程中，这些填料主要是二次原料，包括预处理的危险废物（中和污泥），呈现出各种形状和尺寸的颗粒，而它们在环氧基体中的用量是根据最佳粘度和可加工性来选择的。测定了含有各种填料的环氧复合材料的物理和力学参数，如抗压强度和抗弯强度、与混凝土的粘结力以及热膨胀系数。监测了不同填料类型的环氧复合材料的微观结构以及对化学侵蚀性介质的耐化学性。使用扫描电子显微镜（SEM）并辅以能量色散X射线光谱（EDX）对环氧复合材料的微观结构进行监测。计算机断层扫描（CT）也用于评估环氧复合材料与混凝土的粘结力以及填料在环氧基体中的分散情况。

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