高温对煅烧粘土-石灰石和大理岩混合水泥混凝土的影响

IF 1.6 Q3 ENGINEERING, CIVIL Australian Journal of Civil Engineering Pub Date : 2022-05-16 DOI:10.1080/14488353.2022.2073048
S. M. Gunjal, B. Kondraivendhan
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引用次数: 2

摘要

本文研究了高温对煅烧粘土石灰石水泥混凝土(LC3)和煅烧粘土大理石水泥混凝土(MC3)的影响。在本研究中,M25和M35等级的混凝土是使用LC3和MC3水泥以及普通硅酸盐水泥(OPC)制备的。湿养护28天后,制备尺寸为100×100×100 mm3的立方体,将其置于100°C、200°C、400°C、600°C和800°C的温度下。在规定温度前后对扫描电子显微镜(SEM)、质量损失、表面织构和抗压强度(CS)进行了研究。研究了M25-OPC、M25-LC3和M25-MC3混凝土的X射线衍射(XRD)图谱、热重分析(TGA)和傅立叶变换红外光谱(FTIR)。结果表明,当温度超过400°C时,OPC的质量损失大于LC3和MC3混凝土。在所有高温下,LC3和MC3混凝土中的CS比OPC混凝土中的多。SEM结果表明,与M25-OPC混凝土试样相比,M25-LC3和M25-MC3混凝土试样在高温下具有良好的结构C–S–H凝胶。
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Effect of elevated temperature on the calcined clay-limestone and marble stone blended cement concrete
ABSTRACT The impact of high temperatures on calcined clay-limestone cement concrete (LC3) and calcined clay-marble stone cement concrete (MC3) is studied in this paper. In the present study, M25 and M35 grades of concrete was prepared using LC3 and MC3 cement and ordinary Portland cement (OPC). After 28 days of moist curing, prepared cubes of size 100 × 100 × 100 mm3, which were subjected to 100°C, 200°C, 400°C, 600°C and 800°C temperatures. Scanning electron microscopy (SEM), mass loss, surface texture and compressive strength (CS) were studied before and after specified temperatures. The X-ray diffraction (XRD) patterns, thermogravimetric analysis (TGA) and Fourier transformed infrared (FTIR) spectroscopy have been studied over M25-OPC, M25-LC3 and M25-MC3 concrete. The result shows that when the temperature exceeds 400°C, the mass loss in OPC was more than LC3 and MC3 concrete. CS was more in LC3 and MC3 concrete than OPC concrete at all high temperatures. The SEM results reveal that M25-LC3 and M25-MC3 concrete specimens have a sound structured C–S–H gel at high temperatures as compared to M25-OPC concrete specimens.
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来源期刊
CiteScore
3.90
自引率
7.70%
发文量
31
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