Abstract

During processing and transport, the ceramic industry generates big amounts of waste. In order to limit the number of landfills and to minimise consequences of such waste that is clearly noxious for the environment, this industry remains under great pressure to find effective recycling methods for its waste and by-products. What is more, given the limited resources of traditional aggregate, energy savings and protection of the environment, the construction industry is seeking for new sources of aggregate. For this reason, ceramic waste is increasingly frequently used as coarse and fine aggregate, both in mortars and in concrete mixtures. The goal of studies presented in the paper was to analyse the impact of recycled ceramic aggregate on the frost and salt spray resistance of stucco mortar used in the construction industry. Mortar recipes also contained admixtures that modify properties of the mixture and of the hardened product, such as copolymer of vinyl acetate and methylcellulose with a hydrophobic admixture. Elementary testing was performed related to mechanical and physical parameters of mortars. Among others tests were carried out of compressive strength and flexural strength, a determination was made of density, open and total porosity, absorbability, resistance to salt spray corrosion and frost resistance after 25 freeze–thaw cycles of samples. Replacement of sand by recycled ceramic aggregate causes a change in physical parameters of mortars. It has a positive impact on strength parameters of mortars with concurrent reduction in absorbability and capillary action. Testing of mortar with the addition of ceramic aggregate has proved better frost resistance and resistance to salt crystallisation as compared to mortar to which sand had been added.

Graphic abstract

中文翻译：

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用卫生陶瓷废料中的骨料代替沙子对灰泥砂浆耐久性的影响

摘要

在加工和运输过程中，陶瓷工业产生大量废物。为了限制垃圾掩埋场的数量并最大程度地减少明显对环境有害的此类废物的后果，该行业承受着巨大压力，要求为其废物和副产品寻找有效的回收方法。此外，鉴于传统骨料的资源有限，节能和环境保护，建筑行业正在寻找新的骨料来源。因此，在砂浆和混凝土混合物中，越来越多地使用陶瓷废料作为粗骨料和细骨料。本文提出的研究目标是分析再生陶瓷骨料对建筑业中使用的灰泥砂浆的抗霜性和耐盐雾性的影响。砂浆配方还包含改变混合物和硬化产品性能的混合物，例如乙酸乙烯酯和甲基纤维素与疏水混合物的共聚物。进行了与灰浆的机械和物理参数有关的基础测试。除其他测试外，还进行了25次冻融循环后的抗压强度和抗弯强度测试，包括密度，开孔率和总孔隙率，吸收性，耐盐雾腐蚀性和抗冻性。用回收的陶瓷骨料代替沙子会导致砂浆物理参数发生变化。它对砂浆的强度参数有积极影响，同时会降低吸收性和毛细作用。

图形摘要