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salt weathering of concrete by sodium carbonate and sodium

salt weathering of concrete by sodium carbonate and sodium

(PDF) Salt Weathering of Concrete by Sodium Carbonate and ...

Salt Weathering of Concrete by Sodium Carbonate and Sodium Chloride. May 2010; Aci Materials Journal 107(3):258-266; Authors: Harvey Hilbert Haynes . Haynes

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Salt Weathering of Concrete by Sodium Carbonate and Sodium ...

01/05/2010  Title: Salt Weathering of Concrete by Sodium Carbonate and Sodium Chloride. Author(s): Harvey Haynes, Robert O’Neill, Michael Neff, and P. Kumar Mehta. Publication: Materials Journal. Volume: 107. Issue: 3. Appears on pages(s): 258-266. Keywords: deterioration; durability; physical salt attack; salt hydration distress; salt weathering; sodium carbonate; sodium chloride.

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Salt Weathering of Concrete by Sodium Carbonate and Sodium ...

salt weathering from sodium carbonate and sodium-chloride Title no. 107-M30 Salt Weathering of Concrete by Sodium Carbonate and Sodium Chloride by

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Salt Weathering of Concrete by Sodium Carbonate and Sodium ...

Salt Weathering of Concrete by Sodium Carbonate and Sodium Chloride. Concrete cylinders were partially submerged in 5% sodium carbonate or 5% sodium chloride solutions for up to 3.1 years. Environmental conditions were varied during the test to promote crystallization of various salts, such as thermonatrite (Na2CO3•H2O), natron (Na2CO3•10H2O), or halite (NaCl). In sodium carbonate

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Salt Weathering of Concrete by Sodium Carbonate and Sodium ...

Concrete cylinders were partially submerged in 5% sodium carbonate or 5% sodium chloride solutions for up to 3.1 years. Environmental conditions were varied during the test to promote crystallization of various salts, such as thermonatrite (Na2CO3•H2O), natron (Na2CO3•10H2O), or halite (NaCl). In sodium carbonate solution, temperature and humidity cycles that, alternately, promoted the ...

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Salt Weathering of Concrete by Sodium Carbonate and Sodium ...

Concrete cylinders were partially submerged in 5% sodium carbonate or 5% sodium chloride solutions for up to 3.1 years. Environmental conditions were varied during the test to promote crystallization of various salts, such as thermonatrite (Na2CO3•H2O), natron (Na2CO3•10H2O), or halite (NaCl). In sodium carbonate solution, temperature and humidity cycles that, alternately, promoted the ...

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Salt Weathering of Concrete by Sodium Carbonate and Sodium ...

Article “Salt Weathering of Concrete by Sodium Carbonate and Sodium Chloride” Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and technology information which hitherto stood alone to support the generation of ideas. By linking the information entered, we provide opportunities to make unexpected discoveries and ...

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Does concrete suffer sulfate salt weathering? - ScienceDirect

15/09/2014  Sulfate salt weathering of concrete is questioned in this review paper. ... Many reaction products, in particular magnesium silicate hydrate, brucite, Friedel’s salt, sodium carbonate and thaumasite, are found at a given depth within the concrete. Another field case involves the study of the slabs of the Yongan Dam in Keshi, Xinjiang, P.R. China, where the land is arid and rich in various ...

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(PDF) Physical salt attack on concrete - ResearchGate

Concrete specimens after 104 weeks of partial immersion in: (a) 5% solution of sodium sulfate; (b) 5% sodium carbonate, and (c) 5% sodium chloride. The environmental conditions in the first 76 ...

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Salt Weathering of Natural Stone: A Review of Comparative ...

sodium carbonate, sodium chloride, sodium sulphate More intense effects (powdering and breakage) for sodium carbonate and sodium sulphate. Greater mass loss values for sodium carbonate than for sodium sulphate (around 16 times higher in one case) but with a wide interval, from less than 0.10% in both cases to around 34% for sodium sulphate and ...

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Types and Causes of Concrete Deterioration

19/11/2018  Porous concrete is susceptible to weathering caused by salt crystallization. Examples of salts known to cause weathering of field concrete include sodium carbonate and sodium sulfate (laboratory studies have also related saturated solutions of calcium chloride and other salts to concrete deterioration). Under drying conditions, salt solutions can rise to the surface by capillary action and, as ...

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Salt Weathering of Limestone Aggregate and Concrete ...

Salt Weathering of Limestone Aggregate and Concrete Without Freeze-Thaw ... moves in concrete. The salt water movement and deposition of salt crystals has caused considerable scaling of both the cement paste and the limestone aggregates of the concrete. The salt "gnaws away" or corrodes the limestone aggregate and cement paste, attacking the most accessible and most susceptible parts first ...

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Response of concrete to accelerated physical salt attack ...

01/01/2016  Also, the authors found that hydration phase transformation of sodium carbonate (thermonatrite ... Salt weathering of concrete by sodium carbonate and sodium chloride. ACI Mater. J., 107 (3) (2010), pp. 258-266. View Record in Scopus Google Scholar. H. Haynes, R. O'Neill, P.K. Mehta. Concrete deterioration from physical attack by salts . Concr. Int., 18 (1) (1996), pp. 63-68.

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(PDF) Salt Weathering on Monuments - ResearchGate

The salt now forms clustered, glaze-like (at least in the case of sodium ni trate) aggregates coating partially the surface of the large r cavities. The pore sizes being e xceeded by the crystals ...

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Concrete deterioration due to sulphate- A case study ...

01/01/2018  X-Ray Diffraction analysis shows that the white crystalline material is sodium sulphate crystallised as thenardite and mirablite crystals. The concrete specimens showed, apart from C-S-H, calcite, and portlandite, ettringite formation was there in the concrete samples by analyzing with the XRD and SEM, which was the major cause of spalling at the site . Previous article in issue; Next article ...

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Salt Weathering of Concrete by Sodium Carbonate and Sodium ...

Article “Salt Weathering of Concrete by Sodium Carbonate and Sodium Chloride” Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and technology information which hitherto stood alone to support the generation of ideas. By linking the information entered, we provide opportunities to make unexpected discoveries and ...

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Types and Causes of Concrete Deterioration

19/11/2018  Porous concrete is susceptible to weathering caused by salt crystallization. Examples of salts known to cause weathering of field concrete include sodium carbonate and sodium sulfate (laboratory studies have also related saturated solutions of calcium chloride and other salts to concrete deterioration). Under drying conditions, salt solutions can rise to the surface by capillary action and, as ...

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Durability - Portland Cement Association

Like natural rock such as limestone, porous concrete (generally with a high water-cementitious ratio) is susceptible to weathering caused by salt crystallization. Examples of salts known to cause weathering of concrete include sodium carbonate and sodium sulfate. Sulfate attack and salt crystallization are more severe at locations where the concrete is exposed to wetting and drying cycles ...

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Response of concrete to accelerated physical salt attack ...

01/01/2016  Also, the authors found that hydration phase transformation of sodium carbonate (thermonatrite ... Salt weathering of concrete by sodium carbonate and sodium chloride. ACI Mater. J., 107 (3) (2010), pp. 258-266. View Record in Scopus Google Scholar. H. Haynes, R. O'Neill, P.K. Mehta. Concrete deterioration from physical attack by salts . Concr. Int., 18 (1) (1996), pp. 63-68.

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Salt weathering simulation using a single‐immersion ...

01/06/1993  Also effective were sodium carbonate (1.40 per cent), sodium nitrate (043 per cent) and magnesium sulphate (0.08 per cent). The Gobabeb cycle In contrast to the two previous cycles, no debris liberation was achieved by any of the salt treatments. The Ein Geddi cycle As with the Gobabeb Cycle, no debris liberation was achieved by any of the salt treatments. The Sonorah cycle A small amount of ...

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The Processes - Salt Weathering - Google Search

The main salts often deemed as causing the most damage in salt weathering are Calcium, Sodium or Magnesium based. Some examples of these are: Calcium Carbonate, Sodium Sulphate, Sodium Carbonate, Magnesium Sulphate and Sodium Chloride. Furthermore salts can take the form of 'hydrous' states and integrate more 'ion' based salts such as sulphate ions. Evaporites can be a source of these

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A laboratory experiment on salt weathering by humidity ...

17/12/2018  A laboratory experiment on salt weathering was carried out under changing humidity conditions. Three types of rock (tuff and dense and porous sandstone) with sodium chloride, sodium sulfate, or magnesium sulfate were subjected to humidity oscillations from 20%RH to 98%RH during 6 h periods at 20 °C. Prior to the weathering experiment, the rock specimens were oven-dried, and the

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Experimental frost and salt weathering of chalk—I, Earth ...

01/11/1990  Experiments by Dunn and Hudec (1966) have suggested that the presence of sodium chloride also increases the frost weathering of some carbonate rocks. Goudie (1 974) found that immersion in a saturated solution of sodium sulphate enhanced the frost weathering of chalk, and Williams and Robinson (198 1) showed that, although Ardingly Sandstone soaked in distilled water is

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Concrete deterioration due to sulphate- A case study ...

01/01/2018  X-Ray Diffraction analysis shows that the white crystalline material is sodium sulphate crystallised as thenardite and mirablite crystals. The concrete specimens showed, apart from C-S-H, calcite, and portlandite, ettringite formation was there in the concrete samples by analyzing with the XRD and SEM, which was the major cause of spalling at the site . Previous article in issue; Next article ...

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Concrete degradation - Wikipedia

This reaction produces a gel-like substance of sodium silicate (Na 2 SiO 3 • n H 2 O), also noted Na 2 H 2 SiO 4 • n H 2 O, or N-S-H (sodium silicate hydrate). This hygroscopic gel swells inside the affected reactive aggregates which expand and crack. In its turn, it causes concrete expansion. If concrete is heavily reinforced, it can first cause some prestressing effect before cracking ...

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