Power ultrasound-assisted enhancement of granulated blast furnace slag reactivity in cement paste

IF 10.8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2024-09-30 DOI:10.1016/j.cemconcomp.2024.105781

Paweł Lisowski, Daria Jóźwiak-Niedźwiedzka, Magdalena Osial, Kamil Bochenek, Piotr Denis, Michał A. Glinicki

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Abstract

This paper introduces a first-time investigation into the impact of power ultrasound (PUS)-assisted preparation on the physicochemical and mechanical properties of cement-granulated blast furnace slag (GBFS) composite pastes. Pastes containing deposited GFBS with varying particle size fractions, partially replacing Portland cement, were prepared using PUS (ultrasonic horn tip, 20 kHz, 700 W) in pulse mode in a vertical jacketed glass sonoreactor with closed-circuit cooling. Cement paste incorporating 20 wt.% GBFS as mass substitution with varying particle size fractions was characterized by several physicochemical techniques at different curing ages. Exploring the cement and GBFS interaction induced by PUS, the compressive and flexural strength, the elastic modulus and indentation hardness, the heat of hardening, the mineral composition of hydration products, and the specific surface area BET were evaluated for a curing time of up to 28 days. The grain size distribution of GFBS and the reaction mixture's pH were measured. Both mechanical properties, heat of hydration and nanoporosity exhibited strong sensitivity to PUS treatment. Sonofragmentation of GBFS particles (especially the 125–250 μm fraction) increased with increasing sonication time, resulting in a relative increase of fraction <63 μm and a decrease of fraction >125 μm by 275 % and 60 %, respectively. Using the obtained SEM-EDS data, a simplified mechanism is proposed to explain the effects induced by PUS treatment.

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功率超声辅助提高粒化高炉矿渣在水泥浆中的反应活性

研究了功率超声（PUS）辅助制备技术对水泥粒化高炉矿渣（GBFS）浆料的物理化学和机械特性的影响。在带闭路冷却的超声反应器中，使用脉冲模式的 PUS 对含有不同粒径分数的 GFBS 的糊料进行了部分替代硅酸盐水泥的测试。与传统混合程序相比，性能最好的水泥-GBFS 复合浆料的抗压和抗折 2 天强度（分别为 132% 和 58%）以及维氏硬度和弹性模量（分别为 98% 和 74%）都有显著提高。同样，BET 表面积增加了约 111%，2 天后的累积放热量增加了约 34%，替代凝结时间缩短了（初凝时间缩短了约 32%，终凝时间缩短了约 55%），硅酸盐含量减少了约 29%。这种关联的力量与 C-S-H/C-A-S-H 成核播种有关，这种成核播种可通过 PUS 诱导的界面介质形成。

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来源期刊

Cement & concrete composites 工程技术-材料科学：复合

CiteScore

18.70

自引率

11.40%

发文量

459

审稿时长

65 days

期刊介绍： Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.