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Damage effects on concrete performance and microstructure

Damage effects on concrete performance and microstructure

Damage effects on concrete performance and microstructure ...

2004-10-1  Damage effects on concrete performance and microstructure. ... Abstract. Changes in concrete properties and microstructure associated with different damaging effects were investigated. The damaging effects considered were induced by the exposure of concrete specimens to compression, impact, fatigue, and freeze–thaw cycles in saturated ...

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Damage effects on concrete performance and microstructure ...

The damaging effects considered were induced by the exposure of concrete specimens to compression, impact, fatigue, and freeze–thaw cycles in saturated conditions. The influence of these damaging effects on the flexural strength, impact resistance, permeability and the extent and nature of microcrack propagation in concrete were investigated.

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Damage effects on concrete performance and microstructure

Damage effects on concrete performance and microstructure. Changes in concrete properties and microstructure associated with different damaging effects were investigated. The damaging effects considered were induced by the exposure of concrete specimens to compression, impact, fatigue, and freeze-thaw cycles in saturated conditions.

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Damage effects on concrete performance and microstructure ...

Soroushian and Elzafraney (2004) studied several damage effects on concrete performance and microstructure. These damaging effects include compression, impact, fatigue, and freeze-thaw cycles. ...

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Fatigue damage of high performance concrete through a 2D ...

2009-2-1  Further, the effects of the lattice element properties (i.e. size and finite element type) and fatigue loading parameters (i.e. stress levels) on the damage mechanisms of the actual concrete microstructure have not been reported until now.

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Dynamic compressive strength of concrete damaged by ...

2017-10-15  Changes in concrete properties and microstructure associated with different damaging effects were investigated. Most of the existing researches have studied the static damage performance of concrete under the coupling of fatigue load and freeze-thaw cycles , .

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NUREG/CR-7171 'A Review of the Effects of Radiation on ...

2013-11-22  development of computational models of radiation damage to concrete and assessment of the effects of radiation on concrete durability. Concrete structures used as biological shields and as support for the reactor pressure vessel in current light-water reactor plants are subjected to two types of radiation, gamma and neutron.

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Effect of the high temperatures on the microstructure and ...

2019-2-28  Some authors , studied the performance of concrete structures exposed to fire to ascertain the effects of temperature on their microstructure and the properties of the aggregates. Initially, the vaporisation of the free water between 100 and 140 °C, increasing the pore pressure of

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Technical Note TN 102 - Fire Damaged Concrete

2016-12-29  are detrimental to concrete performance. The common changes in concrete properties associated with various peak temperatures are as follows: Up to 120oC: Oven-drying temperature has negligible effect or damage on the pore system or microstructure of concrete. There is no change in colour. Only free moisture is lost from within the concrete

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Effect of Aggregate Mineralogy and Concrete

2018-2-18  Abstract:Aggregate type and mineralogy are critical factors that influence the engineering properties of concrete. Temperature variations result in internal volume changes could potentially cause a network of micro-cracks leading to a reduction in the concrete’s compressive strength.

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Microstructural damage evolution and its effect on ...

2018-7-12  Concrete structures in cold regions are exposing to cyclic freezing and thawing environment. The thermomechanical performance and durability of these quasi-brittle materials decrease due to microstructural damage (Kosior-Kazberuk, 2013; Ma et al., 2017).Evaluating the mechanical performance of concrete subjected to repeated freeze-thaw actions is of great importance to ensure safety of ...

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Microstructural damage characterization of concrete under ...

While the X-ray micro-/nano-computed tomography technology has been implemented to directly observe concrete microstructure and characterize local damage in recent years, the freeze-thawed damage ...

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Investigation of Microstructural Damage in Ultrahigh ...

2018-4-5  This work aims to investigate the damage in ultrahigh-performance concrete (UHPC) caused by freezing-thawing action. Freezing-thawing tests were carried out on UHPCs with and without steel fibers. Mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray computed tomography (X-ray CT) were applied to detect the microstructure of the UHPC matrix before and after

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A Review of the Effects of Radiation on Microstructure and ...

2021-3-24  From the 1970s until 2012, the efforts addressed development of computational models of radiation damage to concrete and assessment of the effects of radiation on concrete durability. Concrete structures used as biological shields and as support for the reactor pressure vessel in current light-water reactor plants are subjected to two types of ...

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Ice-Formation Expansion of Salt Solution and its Effect on ...

Damage effects on concrete performance and microstructure, Cement Concrete Composites, 26(2004) 853-859. DOI: 10.1016/j.cemconcomp.2003.05.001 [4] Bjon Johannesson.

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Effect of Aggregate Mineralogy and Concrete

2018-2-18  applied sciences Article Effect of Aggregate Mineralogy and Concrete Microstructure on Thermal Expansion and Strength Properties of Concrete Jinwoo An 1, S. Sonny Kim 2,*, Boo Hyun Nam 1,* and Stephan A. Durham 2 1 Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA; [email protected]

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Effect of steam curing regimes on temperature and humidity ...

2021-4-26  Surface covering can significantly reduce surface porosity and damage of steam-cured concrete. • The effects of steam-curing regime and surface covering method on the permeability of concrete were evaluated. • The high temperature-humidity gradient during steam curing is detrimental to the development of concrete microstructure.

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Research on the Corrosion Damage Mechanism of Concrete

2020-10-8  This study aims to investigate the effects of two freeze–thaw environments (i.e., maintenance freeze-thaw (MFT) environment and immersion freeze-thaw (IFT) environment) on the durability performance, deterioration rules, and mechanisms of concrete. In MFT, the concrete specimens were firstly cured in the standard curing environment (temperature, 20#x2009;#xb1;#x2009;3, humidity,

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Experimental and numerical investigations on fatigue ...

2010-2-1  The effects of reactive mineral admixtures (fly ash and ground slag) on damage propagation and fatigue life of concrete are deeply investigated by experiments and numerical simulations based on high-resolution digital images of the actual concrete microstructure.

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Heat damage of concrete surfaces under steam curing and ...

The effects of the precuring time, water-binder ratio, surface treatment methods, mineral admixtures, forming process, and subsequent curing conditions on heat damage of steam-cured concrete were ...

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A Review of the Effects of Radiation on Microstructure and ...

2021-3-24  From the 1970s until 2012, the efforts addressed development of computational models of radiation damage to concrete and assessment of the effects of radiation on concrete durability. Concrete structures used as biological shields and as support for the reactor pressure vessel in current light-water reactor plants are subjected to two types of ...

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Impact load-induced micro-structural damage and micro ...

Abstract The relationship between the nature of micro damage under impact loading and changes in mechanical behavior associated with different microstructures is studied for concretes made with two different coarse aggregates having significant differences mainly in roughness and porosity — sintered fly ash and uncrushed gravel. A range of techniques including X-ray diffraction, digital ...

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FREEZE THAW EFFECT ON PERFORMANCE AND

2017-12-21  1 THE EFFECT OF FREEZE/THAW CYCLES ON THE PERFORMANCE AND MICROSTRUCTURE OF CEMENT-TREATED SOILS Reza Jolous Jamshidi1, Craig B. Lake2, Peter Gunning3 and Colin D. Hills4 1 Ph.D., Civil and Resource Engineering Department, Dalhousie University, Canada. 2 Professor, Civil and Resource Engineering Department, Dalhousie University, Canada. 3

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Assessment of Mechanical Properties and Damage of

2019-7-30  and Damage of High Performance Concrete Subjected to Magnesium Sulfate Environment ... of investigations conducted into these effects [7–11]. The study on the impact of fly ash on the sulfate resistance ... 3.2. Microstructure. In order to study the microstructural

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Effect of nano-silica on the hydration and microstructure ...

Effect of nano-silica on the hydration and microstructure development of Ultra-High Performance Concrete (UHPC) with a low binder amount R. Yu⇑, P. Spiesz, H.J.H. Brouwers Department of the Built Environment, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

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3rd International RILEM Conference on Microstructure ...

2018-5-31  M3 The Damage of Concrete in Mg2++SO42-and Mg2++SO42-+Cl- Solution Zhanfei Wang, Dingyi Yang and Wu Shen 151 M4 Research on the Influence of Seawater on the Properties of Sulphoaluminate Cement Concrete Youqiang Huang, Zhonghe Shui and Kai Wang 163 M5 Effects of Circulated Fluidized-Bed Fly Ash, Ground Granulated Blast-Furnace Slag

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Effect of High Temperatures on the Microstructure of ...

The microstructural and compositional changes within the cement paste exposed to high temperatures were monitored by XRD, FTIR, TGA/DTA and SEM techniques to understand the nature of decomposition of C-S-H gel and the associated physicomechanical properties of thermally damaged cement paste. OPC paste (w/c ratio 0.27) was hydrated for 28 days then fired up to 750°C for 2 hours

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Influence of construction-induced damage on the ...

2021-6-22  During the construction of lightweight cellular concrete (LCC), material damage frequently occurs, causing the degradation and deterioration of the mechanical performance, durability, and subgrade quality of LCC. The construction-induced damage can be more significant than those from the service environment of LCC, such as freeze-thaw (F—T) action in cold regions. However, the effect of ...

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Effects of thermal damage on physical properties and ...

2016-7-26  In this work, we study the impact of thermal damage on the physical and mechanical properties of ultrahigh-performance fiber-reinforced concrete (UHPFRC), especially on their cracking process under compressive loading. Four mixtures of UHPFRC were prepared using identical composition but reinforced with different types of fibers: mineral fibers (Steel or Wollastonite) or

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(PDF) Irradiation Effects on Concrete Structures

For concrete used in dry cask nuclear storage, gamma radiation on the order of MGy is an important weathering mechanism. At such doses, previous studies have observed microstructural effects such ...

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