用于制造低碳足迹砌块和人行道摊铺机的环保碱性活性粘合剂：机械性能和LCA评估

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-12-30 DOI:10.3989/mc.2020.17419

J. Mejía-Arcila, W. Valencia-Saavedra, R. Mejía de Gutiérrez

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引用次数: 9

摘要

本研究建议使用两种基于粉煤灰（FA）作为主要原料的粘合剂和钙源，如磨碎的高炉矿渣（GBFS）或硅酸盐水泥（OPC），用于生产生态高效的预制材料。这些粘合剂表示为FA/GBFS（70/30）和FA/OPC（80/20）。商业硅酸钠和氢氧化钠的混合物用作传统活化剂（SN），稻壳灰（RHA）和NaOH的混合物用作替代活化剂（RN）。结果表明，在固化28天后获得抗压强度高达38MPa和固化360天后获得抗压抗压强度高至65MPa的二元水泥（FA/GBFS-RN）的可能性。混合粘合剂（FA/OPC-RN）在相同的固化年龄下分别为30MPa和61MPa。此外，FA/GBFS-RN报告称，与用硅酸钠和氢氧化钠制成的系统相比，环境和健康影响减少了75%。根据研究结果，选择了符合哥伦比亚标准的FA/GBFS-RN浆体作为生产砌块和人行道摊铺机的最佳材料。

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Eco-efficient alkaline activated binders for manufacturing blocks and pedestrian pavers with low carbon footprint: Mechanical properties and LCA assessment

This study proposes using two types of binders based on fly ash (FA) as primary raw material and a calcium source such as ground granulated blast furnace slag (GBFS) or Portland cement (OPC) for the production of eco-efficient pre-fabricated materials. These binders are denoted FA/GBFS (70/30) and FA/OPC (80/20). A mix of commercial sodium silicate and sodium hydroxide was used as a traditional activator (SN), and the mix of rice husk ash (RHA) and NaOH as an alternative activator (RN). The results show the possibility of obtaining a binary cement (FA/GBFS-RN) with compressive strength up to 38 MPa after curing for 28 days and 65 MPa after curing for 360 days. The hybrid binder (FA/OPC-RN) reported 30 MPa and 61 MPa at the same age of curing. Additionally, FA/GBFS-RN reports reductions in the environmental and health impacts of up to 75% compared to systems made with sodium silicate and sodium hydroxide. Based on the results, FA/ GBFS-RN paste was selected as the optimal material for producing masonry blocks and pedestrian pavers, which met the Colombian standards.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.