Innovative hydraulic lime-based finishes with unconventional aggregates and TiO2 for the improvement of indoor air quality

IF 1.9 Q3 ENGINEERING, MANUFACTURING

Manufacturing Review Pub Date : 2020-01-01 DOI:10.1051/mfreview/2020010

C. Giosué, A. Mobili, B. Citterio, F. Biavasco, M. Ruello, F. Tittarelli

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引用次数: 5

Abstract

This paper reports a study on 8 unconventional hydraulic lime-based mortars able to improve indoor air quality by acting as passive systems. Mortars have been prepared with commercial sand or highly adsorbent materials as aggregates with/without TiO2 as photocatalytic agent, to test also the decomposition of airborne pollutants. Mechanical properties, hygrometric behavior, inhibition of growth of molds and depollution properties have been tested. Despite using porous materials (zeolite and activated carbon), in mortars with unconventional aggregates, compressive strength is higher than in sand-based ones, with a more than double higher water vapor permeability. Zeolite-based mortars have the highest moisture buffering capacity followed by silica gel- and activated carbon-based mortars (1.5–2 times higher than reference, respectively, because of the high porosity of unconventional aggregates). Sand-based mortars show optimum inhibitory capacity against fungal growth. Concerning unconventional aggregates, silica gel mortars have good inhibitory capacity, whereas zeolite and activated carbon give to mortars an optimum substrate for molds. Mortars with unconventional aggregates as silica gel remove more than 80% of tracer pollutant after 2 h of test, whereas zeolite-based mortars remove the 65% of it after 120 min. TiO2 enhances depollution properties as photocatalytic oxidation agent when the mortar is close to saturation.

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创新的液压石灰基饰面采用非常规的骨料和二氧化钛，以改善室内空气质量

本文报道了8种非常规液压石灰基砂浆作为被动系统改善室内空气质量的研究。用商品砂或高吸附性材料作为骨料制备砂浆，用/不加TiO2作为光催化剂，同时测试对空气中污染物的分解。测试了其机械性能、吸湿性能、抑制霉菌生长和去污性能。尽管使用多孔材料(沸石和活性炭)，但非常规骨料砂浆的抗压强度高于砂基砂浆，透气性高出一倍以上。沸石基砂浆具有最高的水分缓冲能力，其次是硅胶基砂浆和活性炭基砂浆(分别比参考材料高1.5-2倍，因为非常规骨料的高孔隙率)。砂基砂浆对真菌生长的抑制能力最佳。对于非常规骨料，硅胶砂浆具有良好的抑制能力，而沸石和活性炭则是砂浆对霉菌的最佳基质。以非常规骨料为硅胶的砂浆在测试2小时后可去除80%以上的示踪污染物，而沸石基砂浆在测试120分钟后可去除65%的示踪污染物。当砂浆接近饱和时，TiO2作为光催化氧化剂增强了砂浆的去污性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Manufacturing Review ENGINEERING, MANUFACTURING-

CiteScore

5.40

自引率

12.00%

发文量

审稿时长

8 weeks

期刊介绍： The aim of the journal is to stimulate and record an international forum for disseminating knowledge on the advances, developments and applications of manufacturing engineering, technology and applied sciences with a focus on critical reviews of developments in manufacturing and emerging trends in this field. The journal intends to establish a specific focus on reviews of developments of key core topics and on the emerging technologies concerning manufacturing engineering, technology and applied sciences, the aim of which is to provide readers with rapid and easy access to definitive and authoritative knowledge and research-backed opinions on future developments. The scope includes, but is not limited to critical reviews and outstanding original research papers on the advances, developments and applications of: Materials for advanced manufacturing (Metals, Polymers, Glass, Ceramics, Composites, Nano-materials, etc.) and recycling, Material processing methods and technology (Machining, Forming/Shaping, Casting, Powder Metallurgy, Laser technology, Joining, etc.), Additive/rapid manufacturing methods and technology, Tooling and surface-engineering technology (fabrication, coating, heat treatment, etc.), Micro-manufacturing methods and technology, Nano-manufacturing methods and technology, Advanced metrology, instrumentation, quality assurance, testing and inspection, Mechatronics for manufacturing automation, Manufacturing machinery and manufacturing systems, Process chain integration and manufacturing platforms, Sustainable manufacturing and Life-cycle analysis, Industry case studies involving applications of the state-of-the-art manufacturing methods, technology and systems. Content will include invited reviews, original research articles, and invited special topic contributions.