Pore Structure, Morphology, and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River

Zhao, Jian; Deng, Yansong; Gao, Peiwei; Lu, Xiaolin; Zhang, Jun; Zong, Jianjun

doi:10.3390/ma13245724

Open AccessArticle

Pore Structure, Morphology, and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River

by

Jian Zhao

¹,

Yansong Deng

²,

Peiwei Gao

^1,*,

Xiaolin Lu

¹,

Jun Zhang

¹ and

Jianjun Zong

¹

Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

²

Jiangxi Changtong Highway Co. LTD, Nanchang 330025, China

^*

Author to whom correspondence should be addressed.

Materials 2020, 13(24), 5724; https://doi.org/10.3390/ma13245724

Submission received: 8 November 2020 / Revised: 3 December 2020 / Accepted: 9 December 2020 / Published: 15 December 2020

(This article belongs to the Section Construction and Building Materials)

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Abstract

The backfill material for the underground pipe wall of Yellow River embankment was developed to avoid the high settlement and environmental damage caused by high filling and excavation. The interrelation between microstructure and compressive strength of the self-compacting foam backfill material with different water–binder ratios and density grades was investigated. The results indicated that the average pores size of the foam backfill material increased with increasing the water–binder ratio. Moreover, the compressive strength of the foam backfill material first increased and then decreased with continuously increasing the water–binder ratio. Based on the observation and the analysis of the computed tomography (CT) image, it can be found that the pore size of the foam backfill material decreased with the increment of the density grade. The overall findings demonstrated that the pore size and volume played an important role in affecting the performance of the foam backfill material used for the construction of the underground pipe wall of Yellow River embankment.

Keywords: self-compacting foam material; pores structure; compressive strength; backfilled underground pipe wall; Yellow River embankment

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MDPI and ACS Style

Zhao, J.; Deng, Y.; Gao, P.; Lu, X.; Zhang, J.; Zong, J. Pore Structure, Morphology, and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River. Materials 2020, 13, 5724. https://doi.org/10.3390/ma13245724

AMA Style

Zhao J, Deng Y, Gao P, Lu X, Zhang J, Zong J. Pore Structure, Morphology, and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River. Materials. 2020; 13(24):5724. https://doi.org/10.3390/ma13245724

Chicago/Turabian Style

Zhao, Jian, Yansong Deng, Peiwei Gao, Xiaolin Lu, Jun Zhang, and Jianjun Zong. 2020. "Pore Structure, Morphology, and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River" Materials 13, no. 24: 5724. https://doi.org/10.3390/ma13245724

APA Style

Zhao, J., Deng, Y., Gao, P., Lu, X., Zhang, J., & Zong, J. (2020). Pore Structure, Morphology, and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River. Materials, 13(24), 5724. https://doi.org/10.3390/ma13245724

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Pore Structure, Morphology, and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River

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