shht建筑材料学报
JOURNAL OF BUILDING MATERIALS
JOURNAL OF BUILDING MATERIALS建筑材料学报1007‑962931‑1764/TU《建筑材料学报》杂志编辑部200092,上海市杨浦区四平路1239号 同济大学材料科学与工程学院1007-9629(2023)08-0922-0910.3969/j.issn.1007-9629.2023.08.013(8-13)20229586-刘TU528A研究简报Research Notes低收缩早强型灌浆料的制备与微观机理Preparation and Microscopic Mechanism of Low Shrinkage and Early Strength Grouting张岩ZHANGYan1高青宇GAOQingyu1纪欢乐JIHuanle2都秀红DUXiuhong3潘慧敏PANHuimin1*燕山大学 城市固废无害化协同处置及利用河北省工程研究中心,河北秦皇岛066004Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste, Yanshan University, Qinhuangdao066004, China天津交通职业学院 路桥工程学院,天津300380School of Road and Bridge Engineering, Tianjin Transportation Technical College, Tianjin300380, China河北建材职业技术学院 河北省绿色高性能建材应用技术协同创新中心,河北秦皇岛066000Hebei Green High‑Performance Building Material Application Technology Collaborative Innovation Center, Hebei Construction Materials Vocational and Technical College, Qinhuangdao066000, China潘慧敏(1978—),女,河北卢龙人,燕山大学教授,博士生导师,博士.E‑mail:panhuimin@ysu.edu.cn
A grouting material using ternary composite system including sulphoaluminate cement, Portland cement and gypsum was prepared, which featured low shrinkage and early strength. The formation mechanism of the microstructure of the obtained grouting material was explored. The results show that the grouting material prepared according to the optimal mix proportion exhibits 1 d and 3 d compressive strengths of 60.1 MPa and 75.5 MPa, and 3 d autogenous shrinkage and 28 d drying shrinkage of 351.39×10-6 and 239.75×10-6, respectively. All of them are higher than those of national standard requirements. Ettringite(AFt) crystals in the hydration products of the grouting material overlap to form a compacted network skeleton, resulting in the high early strength of the grouting material. At the same time, calcium silicate hydrate gel in the hydration products promotes the later strength development of the grouting material. Furthermore, the micro‑expansion effect of AFt gradually reduces the shrinkage deformation of the grouting material, ensuring its early strength and low shrinkage characteristics.
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ZHANG Yan,GAO Qingyu,JI Huanle,et al.Preparation and Microscopic Mechanism of Low Shrinkage and Early Strength Grouting[J].
JOURNAL OF BUILDING MATERIALS,2023,26(08):922-930.