Deterioration Process of Concrete Exposed to Internal Sulfate Attack [PDF]
Materials, 2020 Damage to concrete structures with gypsum-contaminated aggregate occurs frequently. Aggregates in much of the southern part of China are contaminated with gypsum. Therefore, in this study, the effects of using different quantities of gypsum-contaminated aggregate on the expansion and compressive strength of concrete were investigated over a period of ...
Chen W, Huang B, Yuan Y, Deng M.
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Application of sulfate ion fixation in internal sulfate attack: The gel containing barium salt
Case Studies in Construction MaterialsSulfate attack is one of the most important factors affecting the durability of concrete, and the corrosion sources of internal sulfate attack (ISA) mostly come from the raw materials of concrete. Adding corrosion resistance admixtures to concrete is one
Kaiwei Liu +5 more
doaj +4 more sources
The Mechanical Properties of Early Aged Shotcrete under Internal Sulfate Attack. [PDF]
Materials (Basel), 2021 Shotcrete is the primary material for tunnel support due to its early rapid hardening characteristics. During tunnel construction in a sulfate environment, the hardening law of concrete will be affected. In this study, samples were prepared at six different curing times and immersed in four different concentrations of sulfate solutions. A uniaxial test
Jin X, He J, Hou C, Luo W, He W.
europepmc +4 more sources
Influence of internal sulfate attack on cement paste properties: contamination by pyrite [PDF]
Revista IBRACON de Estruturas e Materiais, 2021 : The objective of this work was to evaluate the influence of the presence of sulfate in the microstructure and compressive strength of cement pastes. The lack of availability of more suitable aggregates, for reasons of distance or costs, sometimes leads
Ana Paula Brandão Capraro +2 more
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Development of an accelerated test for Internal Sulfate Attack study [PDF]
MATEC Web of Conferences, 2014 Internal Sulfate Attack (ISA) is a pathology that occurs under certain conditions in concrete having undergone heating above 70 °C at early age (through heating in pre-casting industry or due to hydration in large concrete parts).
Khelil Nacim +2 more
doaj +3 more sources
Diffusion–reaction model for the internal sulfate attack in concrete [PDF]
Construction and Building Materials, 2016 In the analysis of the behavior of concrete structures affected by expansive problems, it is often necessary to use kinetics models of the reactions involved to assess and predict the magnitude, distribution, and evolution over the time of expansion. In this study, a diffusion-reaction model is developed for the internal sulfate attack (ISA) problem ...
Antonio Aguado de Cea
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Resistance of High-Volume Fly Ash Self-Compacting Concrete to Internal Sulfate Attack [PDF]
Engineering and Technology Journal, 2018 This paper investigates the durability of high-volume Fly ash self-compacting concrete, HVFASCC that exposed to internal sulfate attack. At the present work, HVFASCC was produced with two Fly ash replacements: 50 and 60% by weight of Portland cement. The
Tareq Al-Attar, Ahmed Taha
doaj +2 more sources
Effects of an internal sulfate attack and an alkali-aggregate reaction in a concrete dam [PDF]
Construction and Building Materials, 2018 Peer ...
Ana Blanco
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Internal sulfate attack in mortars containing contaminated fine recycled concrete aggregates
Construction and Building Materials, 2021 Abstract Internal sulfate attack can be caused by the gypsum residues present in fine recycled aggregates (FRA). As opposed to the better known external sulfate attack or Delayed Ettringite Formation (DEF), the sulfates in this context are provided by a gypsum contamination of the aggregates.
David Bulteel
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Influence of Internal Sulfate Attack on Some Properties of Self Compacted Concrete
Journal of Engineering, 2017 Self-compacted concrete (SCC) is a highly flowable concrete, with no segregation which can be spread into place by filling the structures framework and permeate the reinforcement without any compaction or mechanical consolidation ACI 237R-14.
Hadeel Khalid Awad Al-Obaidy
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