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硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (5): 1569-1577.

所属专题: 水泥混凝土

• 水泥混凝土 • 上一篇    下一篇

羟基化石墨烯对水泥基渗透结晶型防水材料力学性能的影响

张惠一1, 桂尊曜2, 蒲云东2, 齐孟1, 曹蔚琦3,4, 袁小亚2,4,5   

  1. 1.重庆交通大学土木工程学院,重庆 400074;
    2.重庆交通大学材料科学与工程学院,重庆 400074;
    3.重庆大学光电工程学院光电技术及系统教育部重点实验室,重庆 401331;
    4.重庆诺奖二维材料研究院有限公司,重庆 400044;
    5.重庆交通大学先进功能材料研究所,重庆 400074
  • 收稿日期:2022-11-29 修订日期:2023-03-08 出版日期:2023-05-15 发布日期:2023-06-01
  • 通信作者: 袁小亚,博士,教授。E-mail:yuanxy@cqjtu.edu.cn
  • 作者简介:张惠一(1998—),女,硕士研究生。主要从事纳米石墨烯水泥基复合材料方面的研究。E-mail:1056546914@qq.com
  • 基金资助:
    国家自然科学基金(51402030);重庆市基础科学与前沿技术研究专项基金(cstc2017jcyjBX0028);高端外国专家引进计划(G2022035007L); 重庆市国家自然科学基金(2022NSCQ-MSX1165);国家自然科学基金(51402030);重庆市基础科学与先进技术研究专项基金(cstc2017jcyjBX0028)

Effect of Hydroxylated Graphene on Mechanical Properties of Cement-Based Permeable Crystalline Waterproof Materials

ZHANG Huiyi1, GUI Zunyao2, PU Yundong2, QI Meng1, CAO Weiqi3,4, YUAN Xiaoya2,4,5   

  1. 1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
    2. College of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
    3. Key Laboratory of Optoelectronic Technology & Systems Ministry of Education, Department of Optoelectronic Engineering, Chongqing University, Chongqing 401331, China;
    4. Chongqing 2D Materials Institute, Chongqing 400044, China;
    5. Institute of Advanced Functional Materials, Chongqing Jiaotong University, Chongqing 400074, China
  • Received:2022-11-29 Revised:2023-03-08 Online:2023-05-15 Published:2023-06-01

摘要: 使用羟基化石墨烯(HO-G)改性水泥基渗透结晶型防水材料(CCCW),不仅能够提升结构整体的力学性能,还能在一定程度上降低成本。本文研究了木质素磺酸钠(SL)对HO-G分散能力的影响和HO-G对CCCW力学性能的影响。结果表明:当m(HO-G)∶m(SL)=1∶4时,HO-G在Ca(OH)2中的分散性最佳;当HO-G掺量为0.03%(质量分数)时,HO-G砂浆试件的3、28 d抗压强度较基准试件分别提升了37.69%、33.05%,3、28 d抗折强度分别提升了17.31%、31.52%,HO-G改性后的CCCW涂层试件较单独掺加CCCW涂层试件的抗渗压力比提高了127个百分点;SL能够促进HO-G在水泥基材料中的分散,HO-G在砂浆基质中发挥了填充作用和模板作用,增强了水化产物的密实度,进而提高了材料的力学性能。

关键词: 水泥基材料, 羟基化石墨烯, 渗透结晶型防水材料, 分散性, 力学性能, 抗渗性能

Abstract: The use of hydroxylated graphene (HO-G) modified cement-based permeable crystalline waterproof materials (CCCW) not only improves the mechanical properties of whole structure, but also reduces the cost to a certain extent. The effect of sodium lignosulfonate(SL) on the dispersion performance of HO-G was studied, and the influence of HO-G on the mechanical properties of CCCW was studied. The results show that when the mass ratio of HO-G to SL is 1∶4, HO-G has the best dispersion performance in Ca(OH)2. When HO-G content is 0.03% (mass fraction), compared with benchmark specimen, the 3 and 28 d compressive strength of HO-G mortar specimen increases by 37.69% and 33.05%, respectively and the 3 and 28 d flexural strength increases by 17.31% and 31.52%, respectively. The impermeability pressure ratio of CCCW coating specimens modified by HO-G is 127 percentage points higher than that of CCCW coating specimens alone. SL promotes the dispersion of HO-G in cement-based materials, and HO-G plays a filling role and template role in mortar matrix, which enhances the compactness of hydration products, and then improves the mechanical properties of material.

Key words: cement-based material, hydroxylated graphene, permeable crystalline waterproof material, dispersion performance, mechanical property, impermeability

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