sulfate durability and leaching behaviour of dryand wet

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Sulfate durability and leaching behaviour of dry- and wet ...

Nov 01, 2020  Shotcrete is a material frequently used in underground constructions such as tunnels, where Ca leaching and sulfate attack are important durability issues. In this study, two test methods were employed to investigate the sulfate resistance and leaching behaviour of dry- and wet-mix shotcretes in sulfate solutions on a time-resolved basis.

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(PDF) Sulfate durability and leaching behaviour of dry ...

durability of both wet-mix [ 28–30] and dry-mix shotcrete [ 31–33 ]. Shotcrete is frequently in contact with the underlying substrate, making. it more susceptible to leaching and sulfate ...

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Cement and Concrete Research Vol 137, November 2020 ...

Sulfate durability and leaching behaviour of dry- and wet-mix shotcrete mixes Florian R. Steindl, Isabel Galan, Andre Baldermann, Marlene Sakoparnig, ... Florian Mittermayr

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Investigation of sulfate attack resistance of shotcrete ...

In order to research the sulfate attack resistance of shotcrete, the sulfate attack of shotcrete in the presence and absence of steel fiber was experimentally studied by using dry-wet cycle method. Meanwhile, compared with ordinary concrete by the same mixture, the difference of sulfate attack resistance of shotcrete was studied. The experimental results showed that, with dry-wet cycles ...

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Lukas BRIENDL Bachelor of Science Graz University of ...

In this study, two test methods were employed to investigate the sulfate resistance and leaching behaviour of dry- and wet-mix shotcretes in sulfate solutions on a time-resolved basis. Tests on ...

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Florian STEINDL Postdoc Dr. Graz University of ...

In this study, two test methods were employed to investigate the sulfate resistance and leaching behaviour of dry- and wet-mix shotcretes in sulfate solutions on a time-resolved basis. Tests on ...

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Cement and Concrete Research Vol 137, November 2020 ...

Sulfate durability and leaching behaviour of dry- and wet-mix shotcrete mixes Florian R. Steindl, Isabel Galan, Andre Baldermann, Marlene Sakoparnig, ... Florian Mittermayr

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Effect of dry–wet ratio on sulfate transport-reaction ...

Drying–wetting cycle accelerate the deterioration of concrete in aqueous sulfate environment, but their regime is not well-established. This study investigates the effect of dry–wet ratios (1:1, 3:1, 5:1, and 7:1) on the transport behavior and reaction mechanism of the sulfate in concrete. Concentrations of water-soluble and acid-soluble ...

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‪Isabel Galan‬ - ‪Google Scholar‬

Sulfate durability and leaching behaviour of dry-and wet-mix shotcrete mixes FR Steindl, I Galan, A Baldermann, M Sakoparnig, L Briendl, J Juhart, ... Cement and Concrete Research 137, 106180 , 2020

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Strontium Uptake by Cementitious Materials Environmental ...

Wet chemistry experiments and X-ray absorption fine structure ... Sulfate durability and leaching behaviour of dry- and wet-mix shotcrete mixes. Cement and Concrete Research 2020, 137 , 106180. ... Leaching behaviour of cementitious nuclear wasteforms containing caesium and strontium.

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Cyclic drying and wetting tests on combined remediation of ...

Jun 02, 2021  Studies found that the proper blending of bentonite enhances the dry and wet durability of the solidified body, while the excessive blending of bentonite reduces it. ... on the leaching behavior ...

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Lukas BRIENDL Bachelor of Science Graz University of ...

In this study, two test methods were employed to investigate the sulfate resistance and leaching behaviour of dry- and wet-mix shotcretes in sulfate solutions on a time-resolved basis. Tests on ...

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ASSPC - ADVANCED AND SUSTAINABLE SPRAYED CONCRETE ...

In this study, two test methods were employed to investigate the sulfate resistance and leaching behaviour of dry- and wet-mix shotcretes in sulfate solutions on a time-resolved basis.

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W. KUSTERLE Professor Ostbayerische Technische ...

In this study, two test methods were employed to investigate the sulfate resistance and leaching behaviour of dry- and wet-mix shotcretes in sulfate solutions on a time-resolved basis. Tests on ...

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Durability of clinker reduced shotcrete: Ca2+ leaching ...

Mar 25, 2021  However, dry- and wet-mix shotcrete mixtures containing pozzolanic and latent hydraulic SCMs featured reduced SP values, even in the presence of limestone. The fine carbonate aggregates (0–4 mm) did not negatively influence the SP values: mix W9, with dolomite sand, and W11, with quartz sand showed both a very low Ca 2+ leaching.

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Long-Term Behavior and Durability of Alkali-Activated Clay ...

The inadequate behavior of PO mortar at wet–dry cycles is a concern that should be further examined. However, the maintenance of its load-bearing capacity even after the completion of durability tests grand this mortar as a suitable building material and the specific activator very promising in order to allow further development of new ...

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Influence of accelerator type and dosage on the durability ...

Abstract External sulfate attack in concrete comprises a series of interdependent processes resulting from the interaction of sulfate ions from the external environment and cement phases, resulting in matrix degradation. To obtain a sulfate-resisting matrix, C3A content in cement and water/cement ratio must be controlled. In sprayed concrete, accelerator type and dosage and the interaction ...

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High performance of treated and washed MSWI bottom ash ...

Contaminants leaching of bottom ash is substantially reduced by a combination of dry and wet treatments. • Treated bottom ash granulates fractions (BGF) are in compliance with NEN 12620 ‘Aggregates for concrete’. • BGF used up to 100% natural gravel replacement within concrete, results in equal or higher mechanical strength. •

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Key Engineering Materials Vol. 600 p. 4 Scientific.Net

For assess the leaching behavior were performed the tank test (NEN 7375). ... In this paper, the microstructure of cement pastes constituted by 15% of dry and calcined red mud at 600, 700, 800 and 900oC were investigated by scanning electron microscopy analysis. ... In this study was investigated the behavior of recycled aggregate dry and wet ...

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High performance of treated and washed MSWI bottom ash ...

Feb 05, 2016  Municipal solid waste incineration bottom ash was treated with specially designed dry and wet treatment processes, obtaining high quality bottom ash granulate fractions (BGF) suitable for up to 100% replacement of natural gravel in concrete. ... barium, chrome and copper) and sulfate element leaching behavior are mainly pH dominated and ...

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Quantitative assessment of microstructural changes of ...

The evolution of the microstructure in corrosive environments plays a key role for the performance and durability of cementitious materials, however, appropriate methods to quantitatively describe microstructural alterations are limited. ... external sulfate attack and leaching ... Sulfate durability and leaching behaviour of dry- and wet-mix ...

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Cyclic drying and wetting tests on combined remediation of ...

Jun 02, 2021  Studies found that the proper blending of bentonite enhances the dry and wet durability of the solidified body, while the excessive blending of bentonite reduces it. ... on the leaching behavior ...

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Durability of clinker reduced shotcrete: Ca2+ leaching ...

Mar 25, 2021  However, dry- and wet-mix shotcrete mixtures containing pozzolanic and latent hydraulic SCMs featured reduced SP values, even in the presence of limestone. The fine carbonate aggregates (0–4 mm) did not negatively influence the SP values: mix W9, with dolomite sand, and W11, with quartz sand showed both a very low Ca 2+ leaching.

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Effects of dry-wet cycles on mechanical and leaching ...

Jan 06, 2021  After ten dry-wet cycles, the leaching concentration with an initial Zn 2+ concentration of 1.0 is significantly higher than that of 0.1, indicating that the initial heavy metal concentration can significantly affect the dry-wet cycle durability of solidified soil.. Figure 2a shows that the Zn 2+ concentration in the leaching solution of F0, F10, F20, and F30 is increased by 24, 14, 30, and 7 ...

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Three-dimensional reconstruction and sulfate ions ...

Jul 12, 2021  Fig. 10 (a) and (b) show the variation curve of sulfate ions content in cement paste with 0.4 water-cement ratio under dry-wet cycles and sulfate attack. It was observed that the sulfate ions content increased at different corrosion depth with the increase of corrosion ages under 5% and 10% Na 2 SO 4 solution. In addition, at the corrosion of ...

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Environmental impact, durability performance, and ...

Apr 10, 2021  Leaching behavior of heavy metal ions. The leaching behavior of heavy metal ions in concrete was measured according to the HJT 300–2007 (SEPA, 2007); 10g of each sample was placed into a polypropylene plastic centrifuge tube. Besides, 200 mL of acetic acid solution with a solid-to-liquid ratio of 1:20 was added to the tube.

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RELEVANCE OF DURABILITY TESTING OF SHALES TO FIELD

slake, cyclic wet-dry, and cyclic rate of slaking durability tests. The coarse component consisted of 1.5- to 2-in fragments; the fine component ranged in size from 0.25 to 0.75 in in diameter. Samples pre­ pared for the physicochemical testing were generally crushed at the natural water content to the required

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ENGINEERING BEHAVIOR OF STABILIZED SOILS

Durability testing procedures included freeze-thaw, wet-dry, and leach testing. Atterberg limits and strength tests also were conducted before and after selected durability tests. Changes in pH were monitored during leaching. Relative values of soil stiffness were tracked over a 28-day curing period using the soil stiffness gauge.

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Long-Term Behavior and Durability of Alkali-Activated Clay ...

The inadequate behavior of PO mortar at wet–dry cycles is a concern that should be further examined. However, the maintenance of its load-bearing capacity even after the completion of durability tests grand this mortar as a suitable building material and the specific activator very promising in order to allow further development of new ...

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Performance evolution of recycled aggregate concrete (RAC ...

Jul 10, 2020  The present study investigates the performance of recycled aggregate concrete (RAC) exposed to external sodium sulfate (Na 2 SO 4) attacks in two environments (i.e., the full-soaking and the dry-wet cycling environments) on both the micro and macro scales.It was found that the erosion products generated in RAC were indentical to those in NAC in both environments, but sulfate ions

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Nitrite admixed concrete for wastewater structures ...

Feb 10, 2020  The leaching behavior of nitrite admixed with sulfate resistant cement at different dosages has not been investigated. Furthermore, biofilms develop on the concrete surface in the sewer system and downstream wastewater treatment facilities [26] .

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High performance of treated and washed MSWI bottom ash ...

Contaminants leaching of bottom ash is substantially reduced by a combination of dry and wet treatments. • Treated bottom ash granulates fractions (BGF) are in compliance with NEN 12620 ‘Aggregates for concrete’. • BGF used up to 100% natural gravel replacement within concrete, results in equal or higher mechanical strength. •

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Sulfate Scientific.Net

Based on the previous experimental study on the durability of concrete affected by the factors of both multiple salts and dry-wet cycles, different salts (bicarbonate, sulfate, and chloride salt) soak and dry-wet cycle tests to normal strength concrete (NSC) are conducted in this article.

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High performance of treated and washed MSWI bottom ash ...

Feb 05, 2016  Municipal solid waste incineration bottom ash was treated with specially designed dry and wet treatment processes, obtaining high quality bottom ash granulate fractions (BGF) suitable for up to 100% replacement of natural gravel in concrete. ... barium, chrome and copper) and sulfate element leaching behavior are mainly pH dominated and ...

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