Pore Structure of Calcium Sulfoaluminate Paste and Durability of Concrete in Freeze–Thaw Environment

Bruyn, K. De; Bescher, Eric P.; Ramseyer, Chris; Hong, Seongwon; Kang, Thomas H.‐K.

doi:10.1007/s40069-016-0174-3

Cited by 26 publications

(4 citation statements)

References 12 publications

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“…In previous studies, most of the literature has focused on the variation of macroscopic mechanical properties of concrete under the condition of freeze–thaws cycles. In fact, the microscopic pore structure and pore size distribution inside concrete are closely related to the macroscopic mechanical properties and durability [ 23 , 24 , 44 ]. Therefore, it is necessary to establish a damage variable based on pore structure to describe the evolution of mechanical properties of concrete under different freeze–thaw cycling conditions.…”

Section: Microstructure Characterization Based On Nmr Porositymentioning

confidence: 99%

“…The porosity and pore size distribution (PSD) are significant parameters of the pore structure, which directly affect the permeability, mechanical properties, and durability of concrete [ 21 , 22 , 23 ]. Kashif et al [ 24 , 25 ] concluded that the incorporation of 0.03% graphene oxide (GO) can significantly improve all mechanical properties and reduce microcracks or porosity of the cement composites.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Mechanical Properties and Pore Structure Deterioration of Concrete under Freeze–Thaw Cycles

2021

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Understanding the evolution of mechanical properties and microscopic pore structure of concrete after freeze–thaw cycles is essential to assess the durability and safety of concrete structures. In this work, the degradation law of mechanical properties and damage characteristic of micro-structure of concrete with two water-cement ratios (w/c = 0.45 and 0.55) is investigated under the condition of freezing–thawing cycles. The influence of loading strain rate on dynamic compressive strength is studied. The microscopic pore structure after frost damage is measured by low-field nuclear magnetic resonance (LF-NMR) technique. Then, a damage model based on the porosity variation is established to quantitatively describe the degradation law of macroscopic mechanical properties. The test results show that the relative dynamic modulus of elasticity (RDME), dynamic compressive strength, flexural strength, and splitting tensile strength of concrete decrease with the increase of freeze–thaw cycles. Empirical relations of concrete dynamic increase factor (DIF) under the action of freeze–thaw cycles are proposed. Moreover, the experimental results of NMR indicate that the porosity as well as the proportion of meso-pores and macro-pores of concrete gradually increased with the increasing of freeze–thaw cycles. The research results can provide reference and experimental support for the anti-frost design theory and durability life prediction of hydraulic concrete structures in cold regions.

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Section: Microstructure Characterization Based On Nmr Porositymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties and Pore Structure Deterioration of Concrete under Freeze–Thaw Cycles

2021

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“…Besides that, CSA-based concrete can perform at a temperature of under 5 °C [88]. CSA-based concrete is a good anti-freeze material, where under freeze-thaw performance testing, CSA repair material was found to have 12% less weight loss compared to OPC concrete [89]. Also, CSA-based concrete exhibits good resistance to corrosion and chemical attacks such as sulphate, magnesium, and ammonium salts [81,90].…”

Section: Calcium Sulphoaluminate-basedmentioning

confidence: 99%

Properties of Cementitious Repair Materials for Concrete Pavement

Yeo

Hosen

et al. 2022

Advances in Materials Science and Engineering

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This review aims to provide an insight into concrete pavement repair materials by gathering the relevant research outcomes and specifications. It provides a systematic literature review that focuses on pavement repair and types of cementitious repair material. In general, conventional cementitious repair materials can be divided into 4 categories: ultra-rapid, rapid, accelerated, and normal strength gain. The mechanical and durability properties of conventional cementitious repair materials, i.e., calcium sulphoaluminate-based, calcium aluminate-based, polymer-modified concrete, and ordinary Portland cement-based repair materials are highlighted. The paper also discusses the newly developed ultra-high performance concrete and alkali-activated materials as potential repair materials for concrete pavement due to the good mechanical and durability performance. As a final point, this review may help readers to understand and determine the appropriate type of repair material when distress occurs in concrete pavement.

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“…It is widely acknowledged that CSA concrete exhibits superior performance in freeze-thaw environments compared to OPC concrete owing to its lower porosity and the inclusion of more coarse pores [ 21 , 22 ]. It has also been posited that CSA concrete is more resistant to sulfate attack due primarily to the major hydration product, i.e., ettringite does not react with sulfate [ 9 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance and Chloride Penetration of Calcium Sulfoaluminate Concrete in Marine Tidal Zone

Tang

Zhan

et al. 2023

Materials

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The enhancement of the durability of sulfoaluminate cement (CSA) in marine environments is of great importance. To this end, an investigation was carried out involving the placement of CSA concrete in the tidal zone of Zhairuoshan Island, Zhoushan, China, and subjected to a 20-month marine tidal exposure test. The comparison was made with ordinary Portland cement (OPC) concrete to evaluate the effectiveness of the former. The test findings indicate that the compressive strength of both types of concrete is reduced by seawater dry-wet cycling, and the porosity of the surface concrete is increased. However, the compressive strength of CSA concrete is observed to be more stable under long-term drying–wetting cycles. When the ettringite in the CSA surface concrete is decomposed due to carbonization and alkalinity reduction, its products will react with Ca2+ and SO42− in seawater to regenerate ettringite to fill in the concrete pores, making the concrete strength more stable and hindering chlorine penetration. Furthermore, CSA concrete exhibits a higher capillary absorption capacity than OPC concrete, which results in chloride accumulation on its surface. However, the diffusion capacity of chloride in CSA concrete is significantly lower than that in OPC concrete.

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Pore Structure of Calcium Sulfoaluminate Paste and Durability of Concrete in Freeze–Thaw Environment

Cited by 26 publications

References 12 publications

Experimental Study on Mechanical Properties and Pore Structure Deterioration of Concrete under Freeze–Thaw Cycles

Experimental Study on Mechanical Properties and Pore Structure Deterioration of Concrete under Freeze–Thaw Cycles

Properties of Cementitious Repair Materials for Concrete Pavement

Mechanical Performance and Chloride Penetration of Calcium Sulfoaluminate Concrete in Marine Tidal Zone

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