Ribas Luciane Farias, Cordeiro Guilherme Chagas, Toledo Filho Romildo Dias, Frías Moises, Tavares Luis Marcelo
Department of Civil Engineering, Universidade do Estado do Amazonas - UEA, Manaus, AM, Brazil.
Laboratory of Civil Engineering, Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, RJ, Brazil.
Heliyon. 2024 Oct 19;10(20):e39614. doi: 10.1016/j.heliyon.2024.e39614. eCollection 2024 Oct 30.
The present work investigates the impact of particle size reduction of traditional ceramic materials as partial substitutes for Portland cement in mortars. Ceramic brick, ceramic tile, and stoneware were selected, with three particle sizes ( of 1, 5, and 15 μm) achieved through grinding operations adapted to each material grindability. The reactivity of ceramic powders was assessed via dissolution in saturated lime solution. Mortars were prepared with 10 % and 20 % cement mass replaced by ceramic powders ground to each fineness. The packing density of mortars was evaluated using the Compressible Packing Model. Compressive strength was measured at 1, 3, 7, and 28 days, and pore size distribution was analyzed by mercury intrusion porosimetry. Results indicated that ceramic tile required less grinding energy than brick and stoneware. High-energy grinding slightly altered the crystalline structure and increased amorphous content, enhancing reactivity with lime. Increased cement replacement with finer ceramic powders ( about 1 μm) improved strength, increased mesopores (50 nm), and reduced pore size threshold, attributed to filler and pozzolanic effects. A multiple linear regression model effectively described the influence of various variables on mortar strength with the interaction terms demonstrating the complexity of the interplay of the variables.
本研究探讨了传统陶瓷材料粒度减小作为砂浆中波特兰水泥部分替代品的影响。选择了陶瓷砖、陶瓷瓦和炻器，通过适应每种材料可磨性的研磨操作获得了三种粒径（1、5和15μm）。通过在饱和石灰溶液中的溶解来评估陶瓷粉末的反应活性。用研磨至每种细度的陶瓷粉末取代10%和20%的水泥质量来制备砂浆。使用可压缩堆积模型评估砂浆的堆积密度。在1、3、7和28天测量抗压强度，并通过压汞法分析孔径分布。结果表明，陶瓷瓦所需的研磨能量比砖和炻器少。高能研磨略微改变了晶体结构并增加了无定形含量，增强了与石灰的反应活性。用更细的陶瓷粉末（约1μm）增加水泥替代量可提高强度、增加中孔（50nm）并降低孔径阈值，这归因于填充和火山灰效应。一个多元线性回归模型有效地描述了各种变量对砂浆强度的影响，交互项表明了变量相互作用的复杂性。
