抗分散剂对水下3D打印建筑砂浆性能的影响
作者:
作者单位:

1.同济大学 先进土木工程材料教育部重点实验室,上海 201804;2.同济大学 材料科学与工程学院,上海 201804

作者简介:

杨钱荣(1965—),男,上海人,同济大学副研究员,博士.E-mail:qryang@tongji.edu.cn

通讯作者:

杨钱荣(1965—),男,上海人,同济大学副研究员,博士.E-mail:qryang@tongji.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(51878480,52078369)


Influence of Anti-dispersant on the Performance of Underwater 3D Printing Building Mortar
Author:
Affiliation:

1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University, Shanghai 201804,China;2.School of Materials Science and Engineering,Tongji University, Shanghai 201804,China

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    摘要:

    采用自行提出的表征水下3D打印建筑砂浆(3DPBM)性能的方法,研究了抗分散剂——聚丙烯酰胺(PAM)、纤维素醚(HM)和自制复合抗分散剂(UAD)对水下3DPBM工作性能、抗分散性能及力学性能的影响.结果表明:以PAM制备水下打印砂浆时,易使砂浆团聚,连续性较差,难以泵送挤出,无法满足水陆打印要求;HM和UAD可以增强打印砂浆的水下抗分散性能,进行水下打印,且掺加UAD的3DPBM的水下堆积性能显著优于掺加HM的3DPBM;掺加适量PAM、HM和UAD均可提高3DPBM的水陆强度比,但HM掺量过大时,3DPBM的水陆强度比反而会降低.

    Abstract:

    The self-proposed method to characterize the performance of underwater 3D printing building mortar (3DPBM) was used to study the influence of polyacrylamide(PAM), cellulose ether (HM) and self-made composite anti-dispersing agent(UAD) on the workability, anti-dispersion performance and mechanical properties of underwater 3DPBM. The results show that when PAM is used as an anti-dispersant agent to prepare underwater 3DPBM, it is easy to make the mortar agglomerate, with poor continuity, difficult to pump out, and unable to meet the requirements of printing on land or underwater. HM and UAD as anti-dispersants enhance the underwater anti-dispersion performance of printing building mortar, which can be used for underwater printing. Moreover, the underwater stacking performance of 3DPBM mixed with UAD is significantly better than that of 3DPBM mixed with HM. Adding a proper amount of PAM,HM and UAD can improve the water-land strength ratio of printing mortar, but if the amount of HM is too large, the water-land strength ratio of printing mortar will decrease instead.

    表 8 PAM对水下3DPBM水陆强度比的影响Table 8 Influence of PAM on the underwater-land strength ratio of underwater 3DPBM
    表 9 HM对水下3DPBM水陆强度比的影响Table 9 Influence of HM on underwater-land strength ratio of underwater 3DPBM
    表 6 HM对水下3DPBM抗分散性能的影响Table 6 Influence of HM on dispersion resistance of underwater 3DPBM
    表 3 PAM对水下3DPBM工作性能的影响Table 3 Influence of PAM on the workability of underwater 3DPBM
    表 2 3DPBM中3种抗分散剂的掺量Table 2 Dosage of three types of anti-dispersants in 3DPBM
    表 10 UAD对水下3DPBM水陆强度比的影响Table 10 Influence of UAD on underwater-land strength ratio of underwater 3DPBM
    表 4 UAD对水下3DPBM塑性变形性能的影响Table 4 Influence of UAD on the plastic deformation property of underwater 3DPBM
    图1 3DPBM的陆上堆积性能和水下堆积性能试验Fig.1 On land and underwater stacking performance test of 3DPBM
    图2 3DPBM水下浇筑成型方法示意图Fig.2 Schematic diagram of underwater molding and pouring method for 3DPBM(size:mm)
    图3 PAM对水下3DPBM凝结时间和挤出性能的影响Fig.3 Influence of PAM on the setting time and extrudability of underwater 3DPBM
    图4 HM对水下3DPBM工作性能的影响Fig.4 Influence of HM on workability of underwater 3DPBM
    图5 UAD对水下3DPBM凝结时间和工作性能的影响Fig.5 Influence of HM on the setting time and workability of underwater 3DPBM
    图6 PAM对水下3DPBM力学性能的影响Fig.6 Influence of PAM on mechanical property of underwater 3DPBM
    图7 HM对水下3DPBM力学性能的影响Fig.7 Influence of HM on mechanical property of underwater 3DPBM
    图8 UAD对水下3DPBM力学性能的影响Fig.8 Influence of UAD on mechanical property of underwater 3DPBM
    表 1 水下3DPBM基础配合比Table 1 Initial mix proportion of underwater 3DPBM
    表 5 PAM对水下3DPBM抗分散性能的影响Table 5 Influence of PAM on dispersion resistance of underwater 3DPBM
    表 7 UAD对水下3DPBM抗分散性能的影响Table 7 Influence of UAD on dispersion resistance of underwater 3DPBM
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引用本文

杨钱荣,赵宗志,蒋正武.抗分散剂对水下3D打印建筑砂浆性能的影响[J].建筑材料学报,2022,25(5):461-469

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  • 收稿日期:2021-02-24
  • 最后修改日期:2021-04-10
  • 在线发布日期: 2022-06-24
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