从完全可回收的砂浆中再生水泥：原材料成分的影响

IF 1.4 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Advances in Cement Research Pub Date : 2024-07-25 DOI:10.1680/jadcr.23.00129

Yunpeng Liu, Yingying Cui, Xianxin Tong

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引用次数: 0

摘要

本研究使用完全可回收砂浆（CRM）作为水泥生料进行水泥再生。研究了硅模量（SM）和铝模量（AM）对 CRM 性能、生料可燃性和熟料性能的影响。结果表明，当二氧化硅模量（SM）越高、铝模量（AM）越低时，可用于促进氧化钙向褐铁矿扩散形成铝矾土的熔体就越少。在 SM=2.7 和 2.2 时，再生水泥的抗压强度随着 AM 的增加而增加，而在 SM=1.7 时，抗压强度随着 AM 的增加而降低。建议使用 CRM 的生料率值为中等 SM（SM= 2.2 或 SM=2.7）和 AM=1.5-1.8，煅烧温度为 1400 ℃。回收水泥熟料和再生水泥熟料的强度都相对较高。此外，煅烧温度可进一步降至 1300℃ 或 1350℃，SM（SM=1.7）和 AM（AM=0.9-1.5）均较低。虽然 CRM 早期强度较低，但后期强度相对较高。不过，与对照组相比，其吸水性明显增加。

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The regeneration of cement from completely recyclable mortar: effect of raw materials compositions

In this study, the cement was regenerated using completely recyclable mortar (CRM) as raw cement meals. The effects of silica modulus (SM) and aluminum modulus (AM) on the CRM properties, burnability of raw meal, and clinker properties were studied. The results showed that with a higher SM and lower AM, less melt would be available to facilitate the diffusion of CaO towards belite to form alite. The compressive strength of recycled cement increased with the increase of AM when SM=2.7 and 2.2 and decreased with the increase of AM at a low SM (SM=1.7). The suggested rate value of raw meals using CRM is a medium SM (SM= 2.2 or SM=2.7) and AM=1.5-1.8 with a calcination temperature of 1400 ℃. The strength of both CRM and the obtained recycled cement clinker is relatively high. Moreover, the calcination temperature could be further reduced to 1300℃ or 1350℃with a low SM (SM=1.7) and AM (AM=0.9-1.5). Though the CRM had a lower early strength, it had a relatively high strength in the later stage. However, its water absorption is significantly increased compared to the control group.

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来源期刊

Advances in Cement Research 工程技术-材料科学：综合

CiteScore

3.70

自引率

5.00%

发文量

审稿时长

3.2 months

期刊介绍： Advances in Cement Research highlights the scientific ideas and innovations within the cutting-edge cement manufacture industry. It is a global journal with a scope encompassing cement manufacture and materials, properties and durability of cementitious materials and systems, hydration, interaction of cement with other materials, analysis and testing, special cements and applications.