Preparation of sea water sea sand high performance concrete (SHPC) and serving performance study in marine environment

Li, Tianyu; Liu, Xiaoyan; Zhang, Yumei; Yang, Hailin; Zhi, Zihan; Liu, Li; Ma, Wenli; Shah, Surendra P.; Li, Weihua

doi:10.1016/j.conbuildmat.2020.119114

Cited by 60 publications

(5 citation statements)

References 45 publications

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“…An experimental study [23] found that the presence of chloride in SW accelerates the cement hydration process, leading to a higher level of autogenous shrinkage in concrete mixed with SW, when compared to conventional concrete. Li et al [24] found that after 1 year of conditioning in SW, concrete mixed with SW reduced around 7% of its compressive strength.…”

Section: Introductionmentioning

confidence: 99%

“…Although there are different kinds of fibers, such as metallic, glass, synthetic, and natural fibers [35,36], synthetic fibers, such as PP fiber are suitable for SW concrete applications due to their exceptional ability to resist SW and chemical corrosion. Li et al [24] reported that the high performance and ultra-high performance concretes reinforced with steel fibers retained acceptable strengths and shapes after 1 year of conditioning in SW. However, no particular study is found that explains and compares the tidal erosion behavior of plain and fiberreinforced SW and FW concretes.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the Effects of Polypropylene Fibers on the Mechanical Strength, Permeability, and Erosion Resistance of Freshwater and Seawater Mixed Concretes

Alomayri

Ali

Raza

et al. 2023

JMSE

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Seawater mixed (SW) concrete lessens the freshwater (FW) demand and eases the stress on the already depleting FW resources. The use of SW concrete is a sustainable solution that mitigates the environmental impact of concrete production, especially in coastal regions and islands vulnerable to FW scarcity. This study investigated the influence of polypropylene (PP) fiber incorporation on high-performance-SW concrete’s long-term mechanical and durability performance. The findings indicate that the incorporation of seawater in the production of concrete containing ground granulated blast furnace slag (GGBFS) has a beneficial effect on its early strength. This is due to the fact that SW accelerates the hardening process. SW concrete mixes showed an improvement in strength with aging. The difference between the strength of SW and FW concretes reduced with aging. The PP fiber showed phenomenal improvements in the tensile properties of SW and FW concretes. At the addition of 0.3% PP fiber, SW yielded 56% and 48% higher splitting tensile and flexural strength than plain FW concrete at 28 days, respectively. The use of 0.15% of PP fiber caused notable reductions of around 20% in the water absorption (WA) capacity and a 12–20% reduction in chloride ion permeability (CIP) of SW concrete. The incorporation of PP fiber increases the number of drying–wetting cycles to initiate the erosion of SW and FW concretes in a simulated environment. The use of 0.15% PP fiber is beneficial, as compared to 0.3% PP fiber to control the tidal erosion of SW and FW concretes. After exposure to 126 drying–wetting cycles (stimulated tidal erosion), the mass loss of SW concrete was reduced from 0.56% to 0.22%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating the Effects of Polypropylene Fibers on the Mechanical Strength, Permeability, and Erosion Resistance of Freshwater and Seawater Mixed Concretes

Alomayri

Ali

Raza

et al. 2023

JMSE

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“…However, UHPC has a dense microstructure, which impedes the diffusion of oxygen, water and chloride into the concrete. Two studies have been conducted on steel fiber-UHPC mixed using seawater [54] and sodium chloride [53]. Both studies suggested that corrosion may not be a major problem for the steel fibers inside UHPC due to its low permeability, although corrosion did occur on a thin layer of steel fibers close to the surface of the specimens.…”

Section: Ultrahigh-performance Concrete (Uhpc)mentioning

confidence: 99%

“…Both studies suggested that corrosion may not be a major problem for the steel fibers inside UHPC due to its low permeability, although corrosion did occur on a thin layer of steel fibers close to the surface of the specimens. The durability of seawater-mixed UHPC was investigated in some detail in [54] using lab testing and exposure in a real marine environment. Lab testing showed essentially no carbonation or damage after 1000 freeze-thaw cycles in the lab.…”

Section: Ultrahigh-performance Concrete (Uhpc)mentioning

confidence: 99%

A review of recent advances in the science and technology of seawater-mixed concrete

Ebead

Lau

Lollini

et al. 2022

Cement and Concrete Research

129

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“…They found that compared with freshwater river-sand steel fibers, the mechanical properties of the seawater sea sand concrete were not inferior, and the concrete prepared using seawater sea sand had better fire resistance and blast resistance properties. Li et al [ 41 ] prepared a high-performance concrete (SHPC) using sea sand and simulated seawater, which had good resistance to freezing, chlorination, carbonation, and sulfate. To investigate the service performance of SHPC, they placed it in seawater for one year.…”

Section: Introductionmentioning

confidence: 99%

The Mechanism of Anticorrosion Performance and Mechanical Property Differences between Seawater Sea-Sand and Freshwater River-Sand Ultra-High-Performance Polymer Cement Mortar (UHPC)

Sun

Shi

et al. 2022

Polymers

Self Cite

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There are abundant sea-sand resources on the earth. Traditional sea-sand concrete faced various problems relating to insufficient anticorrosion ability. In this paper, artificial seawater, sea sand, industrial waste, steel fiber, and polycarboxylate superplasticizer were used to prepare ultra-high-performance polymer cement mortar (SSUHPC). At the same time, freshwater river-sand ultra-high-performance polymer cement mortar (FRUHPC) with the same mixing ratio was prepared for comparative study. The compressive strength of SSUHPC reached 162.1 MPa, while the that of FRUHPC reached 173.3 MPa, which was slightly higher. Meanwhile, SSUHPC showed excellent anticorrosion characteristics in terms of carbonization, frost resistance and chloride resistance, and especially for sulfate resistance. The composition of SSUHPC was separated into three parts: mortar, pore and steel fiber, and the performance difference mechanisms of SSUHPC and FRUHPC were investigated by X-ray computed tomography (X-CT), mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The hydration degree of mortar in SSUHPC was higher, with higher content of CSH and CH, and its better optimized gel pore characteristics gave SSUHPC better corrosion resistance. The mechanical properties of SSUHPC were slightly poor due to the uneven dispersion of steel fibers and air pores, with an- air pore porosity of 1.52% (above 200 μm) that was twice that of FRUHPC (0.6%). In this paper, the mechanics and anticorrosion performance of ultra-high-performance polymer cement mortar prepared with seawater sea sand were comprehensively evaluated, and the mechanism of performance difference between SSUHPC and FRUHPC was revealed, conducive to the targeted improvement of sea sand concrete.

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Preparation of sea water sea sand high performance concrete (SHPC) and serving performance study in marine environment

Cited by 60 publications

References 45 publications

Investigating the Effects of Polypropylene Fibers on the Mechanical Strength, Permeability, and Erosion Resistance of Freshwater and Seawater Mixed Concretes

Investigating the Effects of Polypropylene Fibers on the Mechanical Strength, Permeability, and Erosion Resistance of Freshwater and Seawater Mixed Concretes

A review of recent advances in the science and technology of seawater-mixed concrete

The Mechanism of Anticorrosion Performance and Mechanical Property Differences between Seawater Sea-Sand and Freshwater River-Sand Ultra-High-Performance Polymer Cement Mortar (UHPC)

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