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首页 > 过刊浏览>2023年第26卷第9期 >980-987. DOI:10.3969/j.issn.1007-9629.2023.09.005
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正混凝土的Mini-Mason法制备及其性能研究
作者:
作者单位:

1.武汉理工大学 材料科学与工程学院，湖北 武汉 430070;2.武汉理工大学 硅酸盐建筑材料国家重点实验室，湖北 武汉 430070;3.武汉理工大学-加州大学伯克利混凝土科学与技术联合实验室， 湖北 武汉 430070;4.大宗固废综合利用与绿色建材襄阳市重点实验室，湖北 襄阳 441100

作者简介:

张文贵（1996—），男，湖北黄冈人，武汉理工大学硕士生.E-mail：1425656430@qq.com

通讯作者:

沈卫国（1971—），男，湖北京山人，武汉理工大学研究员，博士生导师，博士. E-mail：2367@whut.edu.cn

中图分类号:

TU528.56

基金项目:

国家自然科学基金资助项目（51972247）


Preparation and Properties of Orthoconcrete by Mini-Mason Method
Author:
Affiliation:

1.School of Materials Science and Engineering， Wuhan University of Technology， Wuhan 430070， China;2.State Key Laboratory of Silicate Materials for Architecture， Wuhan University of Technology， Wuhan 430070，China;3.WUT-UC Berkeley Joint Laboratory on Concrete Science and Technology， Wuhan 430070，China;4.Xiangyang Key Laboratory of Comprehensive Utilization of Bulk Solid Waste and Green Building Materials， Xiangyang 441100，China

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    摘要:

    采用Mini-Mason法制备了一种高粗骨料体积分数的骨料嵌锁良好的正混凝土.结果表明：通过提高填充砂浆的流动性，能有效提升混凝土中粗骨料的体积分数至52%，并明显改善混凝土的力学性能、体积稳定性、传质性能和界面过渡区的结构，优化浆体与粗骨料的黏结状态，大幅度降低胶凝材料的用量.试验证明了Mini-Mason工艺的可行性，并为3D打印正混凝土提供了一种新的技术优势.

    Abstract:

    A orthoconcrete with high coarse aggregate volume fraction and good aggregate interlock was prepared by Mini-Mason method. The results show that by improving the fluidity of the filling mortar， the volume fraction of coarse aggregate in concrete can be effectively increased to 52%， and the mechanical properties， volume stability， mass transfer performance and interfacial transition zone structure of concrete can be significantly improved， and the bonding state between slurry and coarse aggregate can be optimized， and the use amount of cementing material can be greatly reduced. The experiment proves the feasibility of the Mini-Mason process and provides a new technical advantage for 3D printing orthoconcrete.

    表 2 集料筛分结果Table 2 Aggregate screening results
    表 1 水泥的基本物理性能Table 1 Basic physical properties of cement
    表 4 粗骨料级配Table 4 Gradation of coarse aggregates
    图1 减水剂掺量对砂浆扩展度和泌水率的影响Fig.1 Effect of water reducer content on dispersion degree and bleeding rate of mortars
    图2 灰砂比对砂浆扩展度和泌水率的影响Fig.2 Effect of cement-sand ratio on dispersion degree and bleeding rate of mortars
    图3 粗骨料级配对混凝土粗骨料体积分数的影响Fig.3 Effect of coarse aggregate grade on volume fraction of concrete coarse aggregate
    图4 砂浆扩展度对混凝土粗骨料体积分数的影响Fig.4 Effect of mortar dispersion degree on volume fraction of concrete coarse aggregate
    图5 灰砂比对混凝土粗骨料体积分数的影响Fig.5 Effect of cement-sand ratio on volume fraction of concrete coarse aggregate
    图6 填充砂浆抗压强度与其制备的混凝土抗压强度关系Fig.6 Relationship between compressive strength of filling mortar and compressive strength of prepared concrete
    图7 粗骨料体积分数对混凝土强度的影响Fig.7 Effect of volume fraction of coarse aggregate on compressive strength of concrete
    图8 不同粗骨料体积分数下混凝土的干缩性能Fig.8 Dry shrinkage of concretes with different volume fractions of coarse aggregates
    图9 粗骨料体积分数对混凝土电通量的影响Fig.9 Effect of volume fraction of coarse aggregates on concrete electric flux
    图10 两种工艺下混凝土界面过渡区的SEM-BSE微观形貌图Fig.10 SEM-BSE micromorphology in ITZ of concretes from two processes
    图11 两种混凝土中界面过渡区的显微硬度Fig.11 Microhardness of ITZ in two kinds of concretes
    图12 不同混凝土中原材料的体积分数Fig.12 Volume fraction of raw materials in different concretes
    表 3 高流态砂浆配合比Table 3 Mix proportions of high fluidic mortars
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张文贵,沈卫国,刘超,王亚楠,吴鹏.正混凝土的Mini-Mason法制备及其性能研究[J].建筑材料学报,2023,26(9):980-987

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  • 收稿日期:2022-10-31
  • 最后修改日期:2023-03-03
  • 在线发布日期: 2023-10-10
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