The role of Li2O, MgO and CuO on SO3 activated clinkers

IF 13.1 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2022-02-01 DOI:10.1016/j.cemconres.2021.106672

Martin Boháč , Dana Kubátová , Michaela Krejčí Kotlánová , Ingrid Khongová , Anežka Zezulová , Radoslav Novotný , Martin Tchingnabé Palou , Theodor Staněk , Dalibor Všianský

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引用次数: 5

Abstract

Clinkers activated by SO₃ and modified by Li₂O, CuO and MgO were prepared from industrial raw materials and burned at 1350 °C. The role of dopants on the burnability of the raw mix was monitored by TG-DTA and heating microscopy. The phase composition of the clinker was characterized by light microscopy, scanning electron microscopy, and X-ray powder diffraction. Predominance of M₁ over M₃ C₃S was determined in all combinations of dopants. Hydration of cement pastes was followed by isothermal calorimetry during the first 48 h and strength development of cement mortars during 365 days of curing. The content of SO₃ incorporated in clinker silicates is lower in the presence of Li₂O and CuO due to the enrichment of interstitial matter. Thermal analysis shows that Li₂O and CuO in combination with SO₃ are strong mineralizers and fluxes during clinkering process.

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Li2O、MgO和CuO对SO3活化熟料的作用

以工业原料为原料，制备了SO3活化、Li2O、CuO和MgO改性的熟料，并在1350℃下燃烧。采用热重差热分析(TG-DTA)和加热显微镜观察了掺杂剂对混合料可燃性的影响。采用光镜、扫描电镜和x射线粉末衍射对熟料的物相组成进行了表征。在所有掺杂剂组合中，M1均优于M3 C3S。水泥浆体水化后48 h采用等温量热法，养护365天水泥砂浆强度发展。在Li2O和CuO存在下，由于间隙物质的富集，熟料硅酸盐中SO3的含量降低。热分析表明，Li2O和CuO与SO3的结合是熟化过程中的强矿化剂和助熔剂。

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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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.