液体纳米CaCO3对砂浆性能的影响及其作用机理

doi:10.16552/j.cnki.issn1001-1625.2024.1623

摘要/Abstract

摘要： 近些年纳米材料在水泥基材料中的研究日益增多,其中纳米CaCO₃作为在许多领域生产和使用最多的纳米材料之一,在水泥基材料中应用前景广阔。为研究液体纳米CaCO₃(LNC)对砂浆性能的影响,本文选取不同LNC掺量,研究其对砂浆工作性能、力学性能、水化行为及微观结构的影响。结果表明:掺加LNC后,砂浆流动度随LNC掺量的增加呈先增大后减小的趋势;掺加LNC可以提高砂浆的抗折与抗压强度,在3.0%(质量分数)掺量LNC时,3 d抗折与抗压强度比基准组分别提高了14.29%和32.51%;LNC通过小尺寸效应和晶核效应可以提高砂浆的密实度,促进水化反应进行,改善孔隙结构。

关键词: 液体纳米CaCO₃, 工作性能, 力学性能, 水化行为, 微观结构, 晶核效应

Abstract: The research of nanomaterials in cementitious materials has been increasing in recent years, among which nano-CaCO₃, as one of the most produced and used nanomaterials in many fields, has a promising application in cementitious materials.In order to investigate the effect of liquid nano-CaCO₃ (LNC) on mortar properties, different LNC content was selected to study its effects on mortar workability, mechanical properties, hydration behavior and microstructure.The results show that after adding LNC, the mortar fluidity shows a tendency of increasing and then decreasing with the increase of LNC content. Addition of LNC improves the flexural and compressive strength of the mortar, and the flexural and compressive strength at 3 d are increased by 14.29% and 32.51%, respectively, compared with the baseline group at 3.0% (mass fraction) LNC content. LNC improves the densification of cementitious materials through small size effect and nucleation effect, promotes the hydration reaction to proceed, and improves the pore structure.

Key words: liquid nano-CaCO₃, workability, mechanical property, hydration behavior, microstructure, nucleation effect

中图分类号:

TQ177.6⁺2

孙久业, 孙倩, 王冬梅, 杨仁和, 李佳琪, 荣辉, 郭义兵, 张鹏宇. 液体纳米CaCO₃对砂浆性能的影响及其作用机理[J]. 硅酸盐通报, 2025, 44(8): 2771-2780.

SUN Jiuye, SUN Qian, WANG Dongmei, YANG Renhe, LI Jiaqi, RONG Hui, GUO Yibing, ZHANG Pengyu. Effect and Mechanism of Liquid Nano-CaCO₃ on Mortar Properties[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(8): 2771-2780.

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液体纳米CaCO₃对砂浆性能的影响及其作用机理

Effect and Mechanism of Liquid Nano-CaCO₃ on Mortar Properties

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