Multi-Objective Optimization of Nano-Silica Modified Cement-Based Materials Mixed With Supplementary Cementitious Materials Based on Response Surface Method

Xiuzhi Zhang; Xiuzhi Zhang; Liming Lin; Liming Lin; Mengdi Bi; Hailong Sun; Hailong Sun; Heng Chen; Heng Chen; Qinfei Li; Qinfei Li; Ru Mu

doi:10.3389/fmats.2021.712551

Frontiers in Materials (Oct 2021)

Multi-Objective Optimization of Nano-Silica Modified Cement-Based Materials Mixed With Supplementary Cementitious Materials Based on Response Surface Method

Xiuzhi Zhang,
Xiuzhi Zhang,
Liming Lin,
Liming Lin,
Mengdi Bi,
Hailong Sun,
Hailong Sun,
Heng Chen,
Heng Chen,
Qinfei Li,
Qinfei Li,
Ru Mu

Affiliations

Xiuzhi Zhang: School of Materials Science and Engineering, University of Jinan, Jinan, China
Xiuzhi Zhang: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, China
Liming Lin: School of Materials Science and Engineering, University of Jinan, Jinan, China
Liming Lin: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, China
Mengdi Bi: School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, China
Hailong Sun: School of Materials Science and Engineering, University of Jinan, Jinan, China
Hailong Sun: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, China
Heng Chen: School of Materials Science and Engineering, University of Jinan, Jinan, China
Heng Chen: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, China
Qinfei Li: School of Materials Science and Engineering, University of Jinan, Jinan, China
Qinfei Li: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, China
Ru Mu: School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, China

DOI: https://doi.org/10.3389/fmats.2021.712551
Journal volume & issue: Vol. 8

Abstract

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This paper investigates the effect of supplementary cementitious materials (SCMs) on the fresh and mechanical properties of nano-silica modified cement-based materials (NSMCBM) based on the response surface method (RSM). Fly ash (FA), ground granulated blast-furnace slag (GGBFS), and silica fume (SF) were selected and the Box-Behnken design (BBD) method was used to design mix proportion. Besides, the quadratic term model was used to describe the relationship between independent variables and responses including fluidity, yield stress, plastic viscosity, thixotropy, and 3, 7, 28, and 56 d compressive strength. Based on the quadratic term model, the response surface of each response was drawn to understand the influence of SCMs. Results showed that FA had significant effect on fluidity and thixotropy while three kinds of SCMs had extremely significant effect on plastic viscosity. Response surface plot showed that NS could increase the plastic viscosity of NSMCBM to 1.445 Pa•s (M16). However, the addition of FA and GGBFS decreased the plastic viscosity to 0.9 Pa•s, which was comparable with the reference sample (M17). Such value was 37.7% lower than that of M16. Meanwhile, NS complemented the reduction of compressive strength caused by SCMs. Thus, the synergy effect of SCMs and NS could improve both fresh and mechanical properties. At last, multi-objective optimization was utilized to optimize the proportion of SCMs considering the interaction between SCMs to achieve desirable parameters.

Published in Frontiers in Materials

ISSN: 2296-8016 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology
Website: https://www.frontiersin.org/journals/materials

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