Properties of tartaric acid modified steel slag as supplementing cementitious materials

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2024-07-26 DOI:10.1111/ijac.14872

Panpan Tang, Yangkai Xiong, Lei Huang, Zhiqiang Fang, Hao Jiang, Guoqing Wang

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Abstract

By using tartaric acid (TA) as a wet‐method modifier to modify steel slag powder (SS), it is helpful to reduce the content of free calcium oxide (f‐CaO) in SS and further improve the mechanical properties and soundness of SS as supplementing cementitious materials (SCM) in the mortar. The results indicate that with the addition of 2 wt% of TA, the number of large particles bigger than 45 µm in the SS decreased, resulting in predominantly smaller particles smaller than 45 µm. While the specific surface area increased from 417 to 704 m2/kg, the water consumption at standard consistency was significantly reduced. The soundness of the paste SS as SCM had improved including the f‐CaO content decreased from 4.81% to 0.95%, and the Le Chatelier expansion reduced from 4.5 to 1.5 mm. The mechanical properties were significantly enhanced, with the flexural strength increasing from 5.6 to 7.8 MPa, and the compressive strength rising from 38.8 to 52.7 MPa. After 28 days of curing in water, the hydration products of the mortar are hydrated calcium silicate (C‐S‐H), calcium hydroxide (CH), and calcium carbonate (CaCO3).

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酒石酸改性钢渣作为水泥基补充材料的性能

使用酒石酸（TA）作为湿法改性剂对钢渣粉（SS）进行改性，有助于降低钢渣粉中游离氧化钙（f-CaO）的含量，并进一步改善钢渣粉作为砂浆中胶凝材料（SCM）的力学性能和密实性。结果表明，添加 2 wt% 的 TA 后，SS 中大于 45 µm 的大颗粒数量减少，主要是小于 45 µm 的小颗粒。虽然比表面积从 417 m2/kg 增加到 704 m2/kg，但标准稠度下的耗水量却显著减少。作为 SCM 的糊状 SS 的稳固性得到了改善，包括 f-CaO 含量从 4.81% 降至 0.95%，勒夏特列膨胀率从 4.5 mm 降至 1.5 mm。机械性能明显提高，抗折强度从 5.6 兆帕提高到 7.8 兆帕，抗压强度从 38.8 兆帕提高到 52.7 兆帕。在水中固化 28 天后，砂浆的水化产物为水合硅酸钙（C-S-H）、氢氧化钙（CH）和碳酸钙（CaCO3）。

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来源期刊

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;