水泥基材料高速纳米压痕聚类分析与矿相识别
作者:
作者单位:

1.上海交通大学 船舶海洋与建筑工程学院,上海 200240;2.上海交通大学 上海市公共建筑和础设施数字化运维重点实验室,上海 200240;3.中国石油集团大庆钻探工程公司 钻井生产技术服务一公司,黑龙江 大庆 163358;4.中石化中原石油工程有限公司 固井公司,河南 濮阳 457000

作者简介:

单钰涵(1996—),女,山东潍坊人,上海交通大学硕士生. E-mail:549687225@sjtu.edu.cn

通讯作者:

侯东伟(1981—),男,河北沧州人,上海交通大学讲师,硕士生导师,博士. E-mail: houdw@sjtu.edu.cn

中图分类号:

TU528.01

基金项目:

国家自然科学基金资助项目(51308334)


Phase Identification of Cementious Materials Based on High-Speed Nanoindentation Mapping by Cluster Analysis
Author:
Affiliation:

1.Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2.Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China;3.NO.1 Drilling Production Technology Service Company, CNPC Daqing Drilling Engineering Company, Daqing 163358, China;4.Cementing Company, Sinopec Zhongyuan Oilfield Service Corporation, Puyang 457000, China

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    摘要:

    通过高速纳米压痕技术测绘了3种水灰比(0.2、0.4和0.6)水泥净浆的弹性模量与硬度云图,引进K-medoids聚类分析方法划分水泥基材料的微观矿相,根据K-medoids聚类结果将力学性能图转化为矿相分布图,并对矿相的尺寸分布进行了统计分析.结果表明:水泥基材料主要包括多孔复合相(PP)、低密度/高密度C-S-H相(LD/HD C-S-H)、氢氧化钙相(CH)和超高性能相(UHP)等;随着水灰比的增加,PP、LD C-S-H的含量逐渐增加,HD C-S-H、UHP的含量逐渐减少;水泥石微观矿相的尺寸符合对数正态分布.

    Abstract:

    The elastic modulus and hardness contours of cement pastes with water-cement ratios of 0.2, 0.4 and 0.6 were mapped by high-speed nanoindentation technology. The K-medoids cluster analysis method was introduced to identify the main microscopic mineral phases of cementitious materials. According to the K-medoids cluster results, the mechanical properties map was transformed into the mineral phase distribution map, and the size distribution of mineral phases was statistically analyzed. The results show that cementitious materials mainly contain porous composite phase (PP), low density/ high density C-S-H phase (LD/HD C-S-H), calcium hydroxide phase (CH) and ultra-high performance phase (UHP). With the increase of water-cement ratio, the contents of PP and LD C-S-H gradually increase, while the contents of HD C-S-H and UHP gradually decrease. The size distribution of mineral phases accords with lognormal distribution.

    表 1 P·O 42.5水泥的主要化学组成Table 1 Main chemical composition of P·O 42.5 cement
    图1 P·O 42.5水泥的粒径分布Fig.1 Particle size distribution of P·O 42.5 cement
    图2 K-medoids聚类过程示意图Fig.2 Schematic diagram of K-medoids clustering
    图3 3个水灰比水泥净浆试样弹性模量的3D-mapping云图Fig.3 3D-mapping cloud map of elastic modulus for cement paste samples with three water-cement ratios
    图4 3个水灰比水泥净浆试样硬度的3D-mapping云图Fig.4 3D-mapping cloud map of hardness for cement paste samples with three water-cement ratios
    图5 3个水灰比试样的K-medoids聚类结果Fig.5 K-medoids clustering results of cement samples with three water-cement ratios
    图6 3个水灰比试样的矿相分布图Fig.6 Main mineral phases mapping of cement samples with three water-cement ratios
    图7 不同水灰比水泥净浆多孔相的尺寸分布Fig.7 Size distribution of PP phase in cement paste with different water-cement ratios
    图8 不同水灰比水泥净浆未水化水泥颗粒相的尺寸分布Fig.8 Size distribution of UHP phase in cement paste with different water-cement ratios
    表 2 不同水灰比水泥净浆主要微观矿相解卷积结果和聚类结果Table 2 Deconvolution results and clustering results of main mineral phases in cement paste with different w/c ratios
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单钰涵,田东诚,赵建胜,陈兵,侯东伟.水泥基材料高速纳米压痕聚类分析与矿相识别[J].建筑材料学报,2023,26(5):563-570

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  • 最后修改日期:2022-05-19
  • 在线发布日期: 2023-06-08
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