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建筑垃圾的再生利用是处理垃圾、保护环境、节约资源的最佳选择。本文就建筑垃圾的产生、利用现状及危害进行了分析。探讨了建筑垃圾作为建筑材料综合回收利用途径。为我国建筑垃圾资源化产业健康有序的发展以及政府推进建筑垃圾资源化利用提供建议。 相似文献
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随着我国城市化进程的加快和社会主义新农村建设的开展,建筑垃圾产生量逐渐增多,如何处理和利用这些建筑垃圾已成为人们普遍关注的问题。本文阐述了城市建筑垃圾的概念及其构成,介绍了城市建筑垃圾的资源化利用及应用途径,以供同行参考。 相似文献
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《应用陶瓷进展》2013,112(8):487-493
AbstractThis paper illustrates a new way to explore reuse alternatives for construction and demolition waste, seeking higher added value applications for the reclaimed waste. Additions (up to 50 wt-%) of a clean construction waste were made to a red clay brick mixture, and sintered samples (950–1150°C, 1 h) were characterised (X-ray diffraction and fluorescence, thermal analysis, firing shrinkage, water absorption and flexural strength). The results show that waste additions below ~10 wt-% result in no significant change in bricks properties; waste additions above ~20 wt-% and a slightly higher firing temperature enable the manufacture of higher grade building products (tiles). The waste changes roles from inert to fluxing at 10–20 wt-% owing to the change of compatibility triangles in the phase diagram. Such large usages of clean construction wastes in applications other than the usual low grade ones demonstrate the importance of selective waste collection programmes. 相似文献
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Besides the generation of aggregates, recycling of mixed construction and demolition waste leads to a more polluted side stream accounting for up to one third of the input materials. This so-called crushed sand often ends up in landfills and is hence lost for a circular economy. This article reports about the processing of this material using a pilot plant jig. The suitability of jigging technology is evaluated, and the product is analyzed as possible circular building material. 相似文献
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李仙乔 《硫磷设计与粉体工程》2007,(4):36-38
针对硫化氢制酸两种工艺的余热利用方案,从余热利用设备的结构特点、工艺指标以及热工检测仪表等方面,比较了两种工艺流程的余热利用情况。湿法制酸的投资虽较高,但产汽量高,推荐采用硫化氢湿法制酸的余热利用方案。 相似文献
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Abstract This paper investigates the thermal behavior of woody biomass waste—demolition wood of Japanese cedar (Cryptomeria japonica) and insect-attacked forest residue of Japanese red pine (Pinus densiflora)—using proximate analyses, thermogravimetry (TG), and differential thermal analysis (DTA), with comparison to virgin wood. For the pine samples, there was no significant difference in thermal behavior or elemental composition between the virgin pine and pine that had been damaged by insects, indicating that insect-damaged pine received here can be treated as virgin pine in terms of energy utilization. The cedar demolition wood used here was partly degraded by termites or fungi. Its degraded part had a lower weight loss rate under nitrogen and a broader exothermic peak in the char combustion stage under air than cedar virgin wood. The changes in the relative levels of the chemical components and the resultant chemical changes that occur upon fungal degradation might complicate char formation. 相似文献
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上海市废弃混凝土来源与回收前景 总被引:5,自引:0,他引:5
对上海市废弃混凝土的产生来源及其数量进行了调查,并预测了未来10年内由于住宅建设产生的废弃混凝土数量.结果表明,旧建筑物的拆除和市政工程的动迁及重大基础设施的改造是废弃混凝土产生的主要来源.未来10年内,每年仅由住宅拆迁和新建产生的废弃混凝土量就可达1390万t.最后,还从天然砂石集料资源、人口密度和工业化发展水平等方面对上海市废弃混凝土的回收前景作了初步分析. 相似文献