东南大学学报（自然科学版）2025，Vol.55Issue(6)：1513-1521,9.DOI:10.3969/j.issn.1001-0505.2025.06.003
高强度搅拌对水泥净浆性能影响试验研究
Experimental study on the influence of high-intensity mixing on the properties of cement paste
摘要
Abstract
In the traditional process of preparing cement paste,the crucial role of mixing intensity on material properties lacks systematic research.To address this problem,this study developed a high-intensity mixing de-vice with an unloaded rotational speed of up to 24 000 r/min and revealed the regulatory mechanism of mixing intensity on the properties of cement paste.Comparative experiments show that compared with conventional mixing method,high-intensity mixing(3 000 r/min)can increase the fluidity of the cement paste by 50.4%and the 28 d compressive strength by 21.4%;the strength of cement mortar also increases by 17.5%during the same period.Combined with the characterization by ultra-depth of field three-dimensional microscopy and low-field nuclear magnetic resonance(LF-NMR)technology,it is shown that high-intensity mixing improves the material properties through the following synergistic effects:enhancing the dispersion and uniformity of ce-ment particles in the paste;optimizing the pore structure distribution,reducing the pore volume,and lowering the porosity;accelerating the hydration process and fully exerting the characteristics of the cementitious materi-als.Because of the high mixing and strong dispersion characteristics of high-intensity mixing,it does not sig-nificantly increase energy consumption and has significant technical economy and environmental friendliness,providing a noval solution for the preparation of green high-performance cement-based materials.关键词
水泥净浆/高强度搅拌/流动度/抗压强度/分散性/孔隙结构Key words
cement paste/high-intensity mixing/fluidity/compressive strength/dispersion/pore structure分类
土木建筑引用本文复制引用
汪继力,姚池,吴诗琪,张小波,马永力,周创兵..高强度搅拌对水泥净浆性能影响试验研究[J].东南大学学报（自然科学版）,2025,55(6):1513-1521,9.基金项目
江西省重大科技研发专项资助项目(20232ACG01003) （20232ACG01003）
国家自然科学基金资助项目(52079062). （52079062）
