Mechanical and durability performance of marine sand and seawater concrete incorporating silicomanganese slag as coarse aggregate

Ting, Matthew Zhi Yeon; Wong, Kwong Soon; Rahman, Muhammad Ekhlasur; Joo, Meheron Selowara

doi:10.1016/j.conbuildmat.2020.119195

Cited by 67 publications

(33 citation statements)

References 25 publications

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“…Through the analysis of macro- and microstructures, it was discovered that seawater sand could increase sulphate resistance, mainly due to the refinement of pore structure and the consumption of erodibility components. Ting et al [ 32 ] prepared concrete using silicomanganese slag, sea sand and seawater and reached a similar conclusion, improving the sulphate resistance of concrete.…”

Section: Introductionmentioning

confidence: 83%

Sulphate Corrosion Mechanism of Ultra-High-Performance Concrete (UHPC) Prepared with Seawater and Sea Sand

Sun

Shi

et al. 2022

Polymers

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The lack of river sand is becoming increasingly serious. In this study, we consider how to use sea sand to prepare innovative construction and building materials with excellent mechanical and durability properties. Sulphate corrosion causes expansion, cracking and spalling of concrete, resulting in the reduction or even loss of concrete strength and cementation force. 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), and the sulphate corrosion mechanism was investigated. The strength and cementation force of mortar on the SSUHPC surface decreased and flaked off with the development of sulphate erosion, and the steel fiber rusted and fell off. A 3D model was established based on X-ray computed tomography (X-CT), and the results showed that SSUHPC maintained excellent internal structural characteristics despite severe sulphate erosion on the surface. Mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were adopted to investigate the sulphate corrosion mechanism of SSUHPC. We found a transition zone within 1–5 mm of the surface of SSUHPC. The Vickers hardness of mortar in this area was increased by 5~15%, and the porosity was reduced to 3.8489%. Obvious structural damage did not occur in this area, but a high content of gypsum appeared. UHPC prepared with seawater sea sand was found to have better sulphate resistance than that prepared with freshwater river sand, which supports the development and utilization of sea sand in concrete.

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Section: Introductionmentioning

confidence: 83%

Sulphate Corrosion Mechanism of Ultra-High-Performance Concrete (UHPC) Prepared with Seawater and Sea Sand

Sun

Shi

et al. 2022

Polymers

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“…The protective performance of concrete is better than that of silane emulsion. Table 7 provides the capillary water absorption coefficients of concrete coated with different waterproof materials at different abrasion depths calculated by Equation (1), and water absorption ratio of different wear depth for 48 h by Equation (2). It can be seen from the table that the capillary water absorption coefficient of the concrete coated with the composite emulsion is the smallest, which further shows that the composite emulsion has the best waterproof effect.…”

Section: The Influence Of Graphene Oxide/silane Composite Emulsion Onmentioning

confidence: 99%

“…Concrete is the most widely used building material in modern society. Research on the durability of concrete has attracted the attention of various researchers [1][2][3]. With the extension of the service time of the concrete, durability decreases, which leads to the destruction of the concrete structure [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of a New Type of Graphene Oxide/Silane Composite Emulsion on the Permeability Resistance of Damaged Concrete

Chen

Zhang²,

et al. 2021

Coatings

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Through penetration depth tests, capillary water absorption tests under different abrasion depths, and capillary water absorption tests of a cement mortar test block with crack damage, a self-prepared, novel, graphene oxide/silane composite emulsion used for the effect of wear or cracking damage was studied. The waterproof performance of concrete and the protective mechanism of a composite emulsion was verified by scanning electron microscopy, X-ray diffraction, and thermogravimetric analysis. The test results showed that the penetration depth of the composite emulsion reached depths greater than 9 mm, which yielded a good waterproof effect; when the concrete was cracked or worn, the composite emulsion still had a stable waterproof performance. It was found that the composite emulsion could form a hydrophobic layer with a certain thickness inside the cement-based material, which explains why the composite emulsion had a good waterproof effect.

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“…Cement concrete is generally prepared with steel bars during its operation. The steel bars corroded seriously when applied in a marine environment [26,27]. The research on the corrosion of steel bars' inner reactive powder concrete with waste fly ash and rice husk ash is a novel topic and is discussed in this study.…”

Section: Introductionmentioning

confidence: 99%

Research on the Mechanical Strengths and the Following Corrosion Resistance of Inner Steel Bars of RPC with Rice Husk Ash and Waste Fly Ash

Wang

2021

Coatings

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In this paper, the slump flow and mechanical strengths (compressive and flexural strengths) of the reactive powder concrete (RPC) with rice husk ash (RHA) and waste fly ash (WFA) were investigated. The following corrosion resistance of steel bars-reinforced specimens was researched. The ultrasonic sound, the mass loss rate, the electrical resistance, and the electrical resistance time history curves were determined to reflect the corrosion resistance of steel bars. The influence of NaCl freeze–thaw cycles and dry–wet alternations was considered. Results showed that the addition of RHA and WFA demonstrated a negative effect on the fluidity of fresh RPC. The fluidity of fresh RPC with WFA was lower. Moreover, RHA and WFA could effectively improve the mechanical strengths of hardened RPC, and the enhancing effect of RHA was higher. The increasing dosage of RHA could improve the corrosion resistance of steel bars in RPC when the specimens were exposed to the environment of NaCl freeze–thaw cycles and dry–wet alternations. However, when WFA was added, the effect was the opposite. The steel bars in RPC corroded more seriously when the specimens were exposed to the environment of NaCl dry–wet alternations than the environment of NaCl freeze–thaw cycles.

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Mechanical and durability performance of marine sand and seawater concrete incorporating silicomanganese slag as coarse aggregate

Abstract: Meheron (2020) Mechanical and durability performance of marine sand and seawater concrete incorporating silicomanganese slag as coarse aggregate. Construction and Building Materials, 254. p. 119195.

Cited by 67 publications

References 25 publications

Sulphate Corrosion Mechanism of Ultra-High-Performance Concrete (UHPC) Prepared with Seawater and Sea Sand

Sulphate Corrosion Mechanism of Ultra-High-Performance Concrete (UHPC) Prepared with Seawater and Sea Sand

Influence of a New Type of Graphene Oxide/Silane Composite Emulsion on the Permeability Resistance of Damaged Concrete

Research on the Mechanical Strengths and the Following Corrosion Resistance of Inner Steel Bars of RPC with Rice Husk Ash and Waste Fly Ash

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