Superhydrophobic foamed concrete based on response surface method: Mix design and its potential application in roofing systems

被引:0
|
作者
Xu, Yidong [1 ]
Sun, Lin [2 ,3 ]
Huang, Xin [2 ]
Yu, Xiaoniu [4 ]
Qian, Ye [4 ]
机构
[1] NingboTech Univ, Sch Civil Engn & Architecture, Ningbo 315100, Peoples R China
[2] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Peoples R China
[3] China Construct Sci & Ind Corp LTD, Shenzhen 518054, Peoples R China
[4] Univ Hong Kong, Dept Civil Engn, Pokfulam Rd, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
Foamed concrete; Superhydrophobic; Polydimethylsiloxane; Response surface method; Finite element analysis; INSULATION MATERIALS; OPTIMIZATION;
D O I
10.1016/j.istruc.2024.107441
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This study employs the response surface method to optimize the mixture design of superhydrophobic foamed concrete. The study investigates the influence of calcium stearate (CS, dosage 1 %similar to 5 %), polydimethylsiloxane (PDMS, dosage 2 %similar to 8 %), and hydroxypropyl methylcellulose (HPMC, dosage 0.05 %similar to 0.2 %) on various properties of foamed concrete, including density, compressive strength, contact angle, and water absorption. Additionally, the research explores the application of superhydrophobic foamed concrete in integrated roofing systems and assesses its thermal and structural performance through finite element analysis. Results reveal that foamed concrete achieves a contact angle greater than 150 degrees when formulated with a mix ratio of CS (3 %), PDMS (8 %), and HPMC (0.05 %), or CS (3 %), PDMS (5 %), and HPMC (0.125 %). A negative linear correlation between the heat transfer coefficient and the thickness of foamed concrete is found. Furthermore, the heat transfer coefficient is inversely related to the spacing between the concave and convex drainage boards. Specifically, for a toe spacing of 50 mm and foamed concrete thickness exceeding 70 mm, the heat transfer coefficient of the roof measures 0.788 W/(m(2)<middle dot>K). When the roof thickness increases from 70 mm to 100 mm, the roof heat transfer coefficient drops to 0.69 W/(m(2)center dot K). When the toe spacing is increased from 50 mm to 60 mm, the heat transfer coefficient of the roof drops sharply to about 0.66 W/(m(2)center dot K) at the thickness of 50 mm. The insulation requirements for the roof are satisfactorily met to 0.8 W/(m(2)<middle dot>K). Under applied roof loads, the maximum von Mises stress experienced by the integrated roof is 0.6 MPa at a toe spacing of 50 mm. With the increase of the roof thickness, the maximum value of the DAMAGEC damage coefficient gradually decreases from 0.3 to 0.17. The maximum damage position has always been at the weak position of the four corners, which is consistent with the actual use status. The research findings on superhydrophobic foamed concrete have significant theoretical and engineering application value. Moreover, the construction of an "insulation/hydrophobic integrated" roof system demonstrates the feasibility of an integrated roof system and the potential for insulation/hydrophobic integration in roof system construction.
引用
收藏
页数:18
相关论文
共 50 条
  • [1] Mix design for recycled aggregate pervious concrete based on response surface methodology
    Zhang, Qiuyue
    Feng, Xuejun
    Chen, Xudong
    Lu, Ke
    CONSTRUCTION AND BUILDING MATERIALS, 2020, 259
  • [2] Design Optimization of Rubber-Basalt Fiber- Modified Concrete Mix Ratios Based on a Response Surface Method
    Gong, Yafeng
    Song, Jiaxiang
    Lin, Siyuan
    Yang, Jianxing
    He, Yang
    Tan, Guojin
    APPLIED SCIENCES-BASEL, 2020, 10 (19): : 1 - 14
  • [3] An efficient uniform design for Kriging-based response surface method an its application
    Li, T. Z.
    Yang, X. L.
    COMPUTERS AND GEOTECHNICS, 2019, 109 : 12 - 22
  • [4] MIX DESIGN WITH RESPONSE SURFACE METHODOLOGY TO OPTIMIZE THE FLEXURAL STRENGTH OF CONCRETE
    Kaseng Solis, Freddy Lizardo
    Clemente Condori, Luis Jimmy
    Rodriguez Rodriguez, Ciro
    3C TECNOLOGIA, 2020, 9 (03): : 47 - 56
  • [5] Safety margin analysis of hydraulic bridge design based on response surface method and its application
    Xiong W.
    Shi H.
    Liu H.
    Li F.
    Cai C.
    Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition), 2021, 51 (05): : 803 - 812
  • [6] Research on fiber reinforced concrete and its performance prediction method and mix design method
    Zhao, Chenggong
    Zhu, Zhenyu
    Guo, Qiuyu
    Zhan, Yulin
    Zhao, Renda
    CONSTRUCTION AND BUILDING MATERIALS, 2023, 365
  • [7] Mix Proportion Design Method of Pervious Concrete Based on Aggregate Sphericity
    Wang C.
    Zhang T.
    Xie X.
    Li B.
    Yang D.
    Jianzhu Cailiao Xuebao/Journal of Building Materials, 2022, 25 (03): : 235 - 241
  • [8] Mix design of asphalt plug joint based on response surface method and grey relational analysis
    Lu, Pengzhen
    Huang, Simin
    Shen, Yang
    Wu, Ying
    Li, Dengguo
    INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING, 2023, 24 (02)
  • [9] A Stochastic Bias Corrected Response Surface Method and its Application to Reliability-Based Design Optimization
    Zhan, Zhenfei
    Fu, Yan
    Yang, Ren-Jye
    SAE INTERNATIONAL JOURNAL OF MATERIALS AND MANUFACTURING, 2014, 7 (02) : 262 - 268
  • [10] Application of Orthogonal Test Method in Mix Proportion Design of Recycled Lightweight Aggregate Concrete
    Zhao, Zhanshan
    An, Le
    Zhang, Yijing
    Yuan, Jie
    ADVANCES IN MATERIALS, MACHINERY, ELECTRONICS I, 2017, 1820