高温烧结下煤矸石和垃圾焚烧粉煤灰在胶凝材料中的应用：物理力学性能及水化产物

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-09-25 DOI:10.1016/j.dibe.2025.100765

Guofu Chen , Tingshu He , Xiaodong Ma , Renhe Yang , Yongqi Da

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引用次数: 0

摘要

煤矸石（CG）和垃圾焚烧粉煤灰（WIFA）是中国主要的固体废物。以便对两种固体废物类型进行增值利用，同时实现对ifa中有害物质的有效固化。本研究将CG和WIFA在不同温度下进行煅烧，并进行共混，得到CG-WIFA，作为水泥的替代品，用于制备水泥基材料。首先，分析了CG-WIFA的相组成和显微组织。然后对CG-WIFA砂浆的流动性、力学性能和火山灰活性进行了分析。最后，采用x射线衍射（XRD）、热重分析（TG-DTG）和压汞孔隙度测定（MIP）等方法对掺入CG-WIFA水泥的水化程度和孔隙结构演化进行了研究。结果表明，在1000℃以上的煅烧温度下，CG-WIFA的圆度增大，1200CG-20WIFA的坍落度达到225 mm，比C提高了10.8%，700CG-0WIFA和800CG-0WIFA的火山灰活性分别为70.9%和74.6%。在与20%的WIFA复合后，这些值分别增加到88.3%和80.2%。WIFA的加入加速了水泥中C3S和C2S的水化反应，细化了水泥的孔径。

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Utilization of xoal gangue and waste incineration fly ash under high temperature sintering in cementitious materials: Physico-Mechanical properties and hydration products

Coal gangue (CG) and Waste incineration fly ash (WIFA) are the main solid waste in China. In order to value-added utilization of both solid waste types, while achieving effective consolidation of harmful substances in WIFA. In this study, CG and WIFA were calcined at different temperatures and blending to obtain CG-WIFA, which will be used as a substitute for cement to prepare cement-based materials. Firstly, the phase composition and microstructure of CG-WIFA were analyzed. Then, the flowability, mechanical properties, and pozzolanic activity of the mortar prepared by CG-WIFA were analyzed. Finally, X-ray diffraction (XRD), thermogravimetric analysis (TG-DTG), and mercury intrusion porosimetry (MIP) were employed to investigate the hydration degree and pore structure evolution of cement incorporated with CG-WIFA. The results showed that the roundness of CG-WIFA increased at calcination temperatures above 1000 °C, and the slump of 1200CG-20WIFA reached 225 mm, an increase of 10.8 % compared to C. The pozzolanic activities of 700CG-0WIFA and 800CG-0WIFA were measured as 70.9 % and 74.6 %, respectively. Upon compounding with 20 % WIFA, these values increased to 88.3 % and 80.2 %. The addition of WIFA accelerated the hydration reaction of C₃S and C₂S in the cement, and refined the pore size of the cement.

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.