Effects of TiO2 waste on the formation of clinker phases and mechanical performance and hydration of Portand cement

CEMENT Pub Date : 2022-09-01 DOI:10.1016/j.cement.2022.100036

José S. Andrade Neto , Bruna B. Mariani , Nilson S. Amorim Júnior Junior , Daniel V. Ribeiro

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引用次数: 1

Abstract

The incorporation of different levels of UOW into Portland clinker raw meals and its effects on the clinker and cement properties were evaluated. Clinkers were produced and characterized by X-ray diffractometry (XRD) and optical microscopy; the cements were produced and physically characterized. Finally, pastes were produced and analyzed using isothermal calorimetry, thermogravimetry, XRD, and compressive strength tests. UOW, when added up to 1.29% in Portland clinker raw meal, acts as a mineralizer, increasing the content of alite by 6.44%. The incorporation of UOW reduces the hydration rate in the first days owing to the increase in the size of the alite crystals and delays the point of sulfate depletion due to the increase in the SO₃ content of the clinkers. Owing to the higher content of alite formed, the cement produced from the raw meal with 1.29% of UOW presents the highest early mechanical strength (up to 7 days).

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TiO2废渣对水泥熟料相形成、力学性能及水化性能的影响

评价了不同水平的UOW掺入硅酸盐熟料生料及其对熟料和水泥性能的影响。制备熟料，并用x射线衍射仪(XRD)和光学显微镜对其进行表征;制备了胶结物并对其进行了物理表征。最后，通过等温量热法、热重法、XRD和抗压强度测试对膏体进行了分析。在波特兰熟料生料中添加1.29%的UOW作为矿化剂，可使alite含量提高6.44%。UOW的加入降低了最初几天的水化速率，这是由于阿利特晶体尺寸的增加，并且由于熟料中SO3含量的增加而推迟了硫酸盐耗尽点。由于形成的阿利特含量较高，由UOW含量为1.29%的生料生产的水泥早期机械强度最高(可达7天)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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CEMENT

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