用于环境应用的新型单组分粉煤灰碱活性水泥

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

Advances in Cement Research Pub Date : 2022-04-21 DOI:10.1680/jadcr.21.00144

Oscar Tarique, M. Kovtun

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引用次数: 2

摘要

利用粉煤灰的碱活性水泥可以作为波特兰水泥的低碳替代品。然而，粉煤灰碱活化水泥需要高温固化，并且由于使用强碱溶液而具有成本加环境影响。采用未分级粉煤灰、硅灰、氢氧化钙和碳酸钠研制了新型一组分粉煤灰碱活性水泥。在环境条件下固化，开发的水泥在3天和28天时分别获得11.0和44.2 MPa的抗压强度。微观结构研究表明，活化剂之间的阳离子交换反应是水泥微观结构和强度发展的关键因素。所开发的新型粉煤灰碱活性水泥对全球变暖的影响比高度混合的波特兰水泥低至少50%。

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Novel one-part fly ash alkali-activated cements for ambient applications

Alkali-activated cements utilising fly ash can be a low carbon alternative to Portland cement. However, fly ash alkali-activated cements require elevated temperature curing and has cost plus environmental implications due to the use of strong alkali solutions. Unclassified fly ash, silica fume, calcium hydroxide and sodium carbonate were used to develop novel one-part fly ash alkali-activated cements. Cured at ambient conditions, the developed cements gained compressive strength up to 11.0 and 44.2 MPa at 3 and 28 days respectively. Microstructural investigations revealed that cation exchange reaction between the activators was the key element in microstructural and strength development of the cements. The developed novel fly ash alkali-activated cements have at least 50% lower impact on global warming than highly blended Portland cements.

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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.