Spark plasma sintering using siliceous waste concrete powder

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2025-07-17 DOI:10.1111/ijac.70019

Yasuyuki Kanda

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Abstract

Spark plasma sintering (SPS) was performed using siliceous waste concrete powder for the effective utilization of waste concrete. The sintering temperature of the SPS compacts was optimized to improve their mechanical properties. Siliceous waste concrete powder was prepared using a pot-milling procedure of waste concrete. SPS was conducted by varying the sintering temperature from 1173 to 1273 K. Consequently, the Vickers hardness (HV), flexural modulus, and flexural strength were maximized at a sintering temperature of 1248 K. At a sintering temperature of 1248 K, the HV, flexural modulus, and flexural strength were 604, 66.3 GPa, and 75.0 MPa, respectively. Thus, the proposed SPS compact possessed twice the flexural strength defined in the ISO 13006 standard (35 MPa), which classifies ceramic tiles. Furthermore, diopside synthesis was detected owing to the decarburization of calcite during sintering. Therefore, siliceous waste concrete powder is a promising raw material for ceramics processed using SPS.

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利用硅质废混凝土粉进行放电等离子烧结

为有效利用废混凝土，采用硅质废混凝土粉进行了放电等离子烧结。优化了SPS压坯的烧结温度，提高了其力学性能。采用废混凝土锅磨工艺制备了含硅废混凝土粉。在1173 ~ 1273 K的烧结温度范围内进行了SPS实验。在1248 K的烧结温度下，合金的维氏硬度（HV）、抗弯模量和抗弯强度达到最大。在1248 K的烧结温度下，HV为604，抗弯模量为66.3 GPa，抗弯强度为75.0 MPa。因此，SPS紧凑型具有ISO 13006标准（35 MPa）中定义的抗弯强度的两倍，该标准对瓷砖进行了分类。此外，由于方解石在烧结过程中脱碳，检测到透辉石的合成。因此，硅质废混凝土粉是一种很有前途的SPS陶瓷原料。

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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;