Next Article in Journal
Silicon Nanowires: A Breakthrough for Thermoelectric Applications
Next Article in Special Issue
Influence of Mineral Additives on the Efflorescence of Ettringite-Rich Systems
Previous Article in Journal
Biomimetic Octacalcium Phosphate Bone Has Superior Bone Regeneration Ability Compared to Xenogeneic or Synthetic Bone
Previous Article in Special Issue
Identification of Chemical Bonds and Microstructure of Hydrated Tricalcium Silicate (C3S) by a Coupled Micro-Raman/BSE-EDS Evaluation
Article

The Failure Mechanisms of Precast Geopolymer after Water Immersion

by 1,2, 1,2,*, 1,2, 1,2 and 1,2
1
School of Materials Science and Engineering, Tongji University, 4800 Cao’an Road, Shanghai 201804, China
2
Key Laboratory of Advanced Civil Engineering Materials, Tongji University, Ministry of Education, 4800 Cao’an Road, Shanghai 201804, China
*
Author to whom correspondence should be addressed.
Academic Editor: F. Pacheco Torgal
Materials 2021, 14(18), 5299; https://doi.org/10.3390/ma14185299
Received: 20 July 2021 / Revised: 6 September 2021 / Accepted: 10 September 2021 / Published: 14 September 2021
(This article belongs to the Special Issue Corrosion, Properties and Characterization in Concrete)
Precast geopolymers with lower water/binder (0.14), which mainly consists of alkali solution, fly ash (FA) and steel slag (SS), were manufactured through molding pressing technology. The failure mechanisms of precast geopolymers after water immersion were studied by testing the loss of compressive strength, the pH of the leaching solution, the concentration of ions (Na+, Ca2+, Si4+ and Al3+), the evolution of phases, pore structure and morphology, and further discussion of the regulation evolution was performed. The results show that the harmful pores (>50 nm) of geopolymers progressively decrease from 70% to 50% after 28 days of water immersion when the content of steel slag increases from 0 to 80 wt.%. Compressive strength of geopolymers sharply reduces in the first 3 days and then increases during the water immersion process, but the phase composition varies slightly. Furthermore, increasing the content of steel slag could decrease the total porosity and further prevent the water resistance. View Full-Text
Keywords: steel slag; geopolymer; water immersion; molding pressure technology steel slag; geopolymer; water immersion; molding pressure technology
Show Figures

Figure 1

MDPI and ACS Style

Wang, S.; Yu, L.; Xu, L.; Wu, K.; Yang, Z. The Failure Mechanisms of Precast Geopolymer after Water Immersion. Materials 2021, 14, 5299. https://doi.org/10.3390/ma14185299

AMA Style

Wang S, Yu L, Xu L, Wu K, Yang Z. The Failure Mechanisms of Precast Geopolymer after Water Immersion. Materials. 2021; 14(18):5299. https://doi.org/10.3390/ma14185299

Chicago/Turabian Style

Wang, Shunfeng, Long Yu, Linglin Xu, Kai Wu, and Zhenghong Yang. 2021. "The Failure Mechanisms of Precast Geopolymer after Water Immersion" Materials 14, no. 18: 5299. https://doi.org/10.3390/ma14185299

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop