长沙理工大学学报(自然科学版)
高强水泥基材料的配制及性能
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杨帆(1989-),男,湖北荆门人,长沙理工大学硕士研究生,主要从事道路新材料方面的研究

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TU528.31

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湖南省教育厅重点科研项目(14A001);湖南省水利科技计划项目(湘水科计[2016]194-40)


Preparation and properties investigation of high strength cementitious materials
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    摘要:

    针对传统水泥基材料存在的强度较低、功能单一、成本偏高、工艺复杂、收缩较大等问题,以多种活性粉末为基础材料,通过单因素、正交试验及极差分析方法,确定了以强度性能为指标的高强水泥基材料质量配合比为水泥∶FA∶硅粉∶砂∶PP∶减水剂∶UEA:硅溶胶∶SBR∶水=100∶12∶6∶46.75∶0.08∶ 1.36∶3∶0.7∶1.3∶28.5,28d抗折/抗压强度达到12.4MPa/110.06MPa。在此基础上,通过干缩性能试验、DSC、SEM、XRD等方法,对高强水泥基材料性能进行了进一步分析。研究结果表明,掺入 UEA 的28d 干缩率为0.176%,比0% UEA 掺量的干缩值减少了0.077%;高强水泥基材料二次水化程度较低,但微观上堆积良好、结构致密均匀的超细粉胶凝体系保证了其高强、低脆的性能。

    Abstract:

    Aiming at the problems such as low strength, single function, high cost, compli-cated process and large shrinkage, the traditional cement-based materials are based on ava-riety of active powder, optimal mix proportion of high strength cementitious materials was determined with the index of strength by single-factor, orthogonal experiments and range a-nalysis method, which was:cement:FA:silicon fume:sand:PP:water reduce agent:UEA:silicasol:SBR:water=100:12:6:46.75:0.08:1.36:3:0.7:1.3:285,and itis28d compressive/flexural strength achieved 12.4MPa/110.06MPa.On the basis of optimal mix proportion, through the drying shrinkage properties test, DSC, SEM, XRD and other methods, further analysis of the properties of high strength cement based materi-als, which show that the drying shrinkage of specimen added 3%UEA was decreased 0.077%compared with specimen added 0%UEA to 0.176%.And the secondary hydration level of high strength cementitious materials is poor, but the high strength and toughness performance were obtained from favorable accumulation and densified homogeneous struc-ture in the microscopic dimension.

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引用本文

杨帆,李九苏,赵明博,等.高强水泥基材料的配制及性能[J].长沙理工大学学报(自然科学版),2017,(2):20-25.
YANG Fan, LI Jiu-su, ZHAO Ming-bo, et al. Preparation and properties investigation of high strength cementitious materials[J]. Journal of Changsha University of Science & Technology (Natural Science),2017,(2):20-25.

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  • 在线发布日期: 2022-04-28
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