effect of acid soluble sulphate on concrete

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effect of acid soluble sulphate on concrete
  • Sulfate attack in concrete

    External Sulfate Attack
  • Effect Of Acid Soluble Sulphate On Concrete MC World.INC

    Sulfate attack in concrete and mortar Wikipedia2019-11-06 Sulfate attack in cement, mortar and concrete. Cement is composed of mainly two minerals tri-c. Large-scale crushing & screening & milling plants. Offer efficient, cost-effective services for you. +7(927)687 07 58 [email protected] Piskunov street, Irkutsk. Russian Federation. Home; About Us; Products; Solutions; Contact; AS a leading

  • Sulphate Attack on Concrete Process and Control of

    26/11/2016· The compounds responsible for sulphate attack on concrete are water-soluble sulphate-containing salts, such as alkali-earth (calcium, magnesium) and alkali (sodium, potassium) sulphates that are capable of chemically reacting with components of concrete.

  • Sulfate Attack an overview | ScienceDirect Topics

    Sulfate attack is another possible deterioration mechanism of concrete. It can have endogenous origin (developing without any contribution from the environment) or exogenous origins (such as sulfates contained in the soils or in liquids) (Germain, 2008; Neville, 2004).In both cases, the consequence is some volume expansion owing to the delayed formation of ettringite, which is an expansive

  • Sulfate Attack and Sulfate Content in Concrete: A

    14/01/2017· Clause 6.2.5.3 of BS 8110 Part-1: 1995, Structural use of concrete had a limit of 4% by mass of cement based on the total acid soluble content of the concrete mix, expressed as SO3. This

  • Sulfate specification for structural backfills

    minus acid-soluble sulfate. If this is greater than the limiting values given in the document, the material should not be used for structural backfill. For backfill to concrete, the total potential sulfate (TPS), calculated from the total sulfur content, also has to be considered, and a limiting value is given in the report. If a material is unacceptable because of the OS or TPS values, but

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  • Sulfate in concrete

    Sulfate in concrete. Excessive amounts of mobile sulfate, derived from aggregates or other constituents in concrete, can cause disruption due to expansion. BS 8110 part 1 Structural use of concrete, 1985, had a limit of 4% by mass of cement based on the total acid soluble sulfate method expressed as SO 3 (clauses 6.2.5.3). This restriction was dropped in the 1997 edition as materials were

  • Sulfate damage to concrete floors on sulfate-bearing hardcore

    8 Sulfate damage to concrete floors on sulfate-bearing hardcore To produce deleterious amounts of ettringite the reaction requires the presence of: • a significantconcentration of water-soluble sulfates • concrete which contains a substantial content of calcium aluminate hydrates, as is the case in concrete made with most Portland cements • wet conditions. Incoming sulfate ions may also

  • Acid Attack on Concrete Effects & Results of Acid Attack

    3NO 2 + H 2 O ==> 2HNO 3 + NO. Though HNO 3 is not as strong as H 2 SO 4, its effect on concrete at brief exposure is more destructive since it transforms CH into highly soluble calcium nitrate salt and low soluble calcium nitro-aluminate hydrate.. Nitric acid attack is a typical acidic corrosion for shrinkage of the corroded layer due to leaching of highly soluble calcium nitrate.

  • Sulfate Attack an overview | ScienceDirect Topics

    Sulfate attack is another possible deterioration mechanism of concrete. It can have endogenous origin (developing without any contribution from the environment) or exogenous origins (such as sulfates contained in the soils or in liquids) (Germain, 2008; Neville, 2004).In both cases, the consequence is some volume expansion owing to the delayed formation of ettringite, which is an expansive

  • Sulfate in concrete

    Sulfate in concrete. Excessive amounts of mobile sulfate, derived from aggregates or other constituents in concrete, can cause disruption due to expansion. BS 8110 part 1 Structural use of concrete, 1985, had a limit of 4% by mass of cement based on the total acid soluble sulfate method expressed as SO 3 (clauses 6.2.5.3). This restriction was dropped in the 1997 edition as materials were

  • Sulfate damage to concrete floors on sulfate-bearing hardcore

    8 Sulfate damage to concrete floors on sulfate-bearing hardcore To produce deleterious amounts of ettringite the reaction requires the presence of: • a significantconcentration of water-soluble sulfates • concrete which contains a substantial content of calcium aluminate hydrates, as is the case in concrete made with most Portland cements • wet conditions. Incoming sulfate ions may also

  • Acid Attack on Concrete Effects & Results of Acid

    3NO 2 + H 2 O ==> 2HNO 3 + NO. Though HNO 3 is not as strong as H 2 SO 4, its effect on concrete at brief exposure is more destructive since it transforms CH into highly soluble calcium nitrate salt and low soluble calcium nitro-aluminate hydrate.. Nitric acid attack is a typical acidic corrosion for shrinkage of the corroded layer due to leaching of highly soluble calcium nitrate.

  • determination of acid soluble sulfate in concrete

    4.1 This test method can be used to determine if soils could have an adverse reaction with hydraulic cement concrete. 1.1 This test method is for the determination of water-soluble sulfate in soils. 1.2 This test method was developed for concentrations of water-soluble sulfate in soils between 0

  • The effect of chloride and sulfate ions on reinforcement

    01/01/1993· The effect of chloride, sulfate and chloride-sulfate solutions on corrosion of steel embedded in cement paste has been investigated. The reinforcement corrosion was evaluated by measuring corrosion potentials and corrosion current density using D.C. linear polarization resistance technique. Results indicate that the corrosion activity was very minimal in specimens immersed in pure sulfate

  • Concrete degradation Wikipedia

    Concrete degradation may have various causes. Concrete can be damaged by fire, aggregate expansion, sea water effects, bacterial corrosion, calcium leaching, physical damage and chemical damage (from carbonatation, chlorides, sulfates and non-distilled water). This process adversely affects concrete exposed to these damaging stimuli. Aggregate expansion. Typical crack pattern associated

  • Sulphate attack in Concrete, Its Effects, Causes and

    17/07/2016· Sulphate attack might show itself in different forms depending upon the chemical form of the sulfate and the atmospheric environment which the concrete is exposed to. Groundwater or soil contains soluble sulfates naturally or sometimes it comes from the industrial effluents or fertilizers which sometimes also contains amounium sulfate which attacks hydrated cement paste by producing gypsum.

  • Concrete Pipe in Acid Sulfate Soil Conditions

    To obtain a perspective on the relative acid and sulfate effects from sulfuric acid, the levels of these two properties corresponding to varying concentrations of sulfuric acid in solution set out in Figure 1. CoNCRETE PIPE IN ACID SuLFATE SoIL CoNDITIoNS FIGURe 1 pH & sulfate content of sulfuric acid Concentration of sulfuric acid – micromole/L pH Sulfate 3 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1

  • Chloride limits in the ACI 318 Concrete Construction

    tested by the acid-soluble test method, the amount is taken as 0.20% chloride ion by weight of cement, or for the same cement content, 1.2 pounds of chloride ion per cubic yard. To understand the rationale for the proposed revisions, let’s first look at the limits in the current code require-ments. Table 1 gives the current limits in Table 4.4.1 of 318-95. These are the values many of you

  • Concrete Pipe in Acid Sulfate Soil Conditions

    To obtain a perspective on the relative acid and sulfate effects from sulfuric acid, the levels of these two properties corresponding to varying concentrations of sulfuric acid in solution set out in Figure 1. CoNCRETE PIPE IN ACID SuLFATE SoIL CoNDITIoNS FIGURe 1 pH & sulfate content of sulfuric acid Concentration of sulfuric acid – micromole/L pH Sulfate 3 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1

  • determination of acid soluble sulfate in concrete

    4.1 This test method can be used to determine if soils could have an adverse reaction with hydraulic cement concrete. 1.1 This test method is for the determination of water-soluble sulfate in soils. 1.2 This test method was developed for concentrations of water-soluble sulfate in soils between 0

  • Sulfate Attack External and Internal Causes

    The higher the C 3 A content, the more prone the concrete is to sulfate attack. To improve the sulfate resistance of concrete, lower C 3 A cements are available. ASTM C 150 Type II cement (MSR) with <8% C 3 A, and Type V cement (HSR) with <5% C 3 A are typically specified in sulfate environments. This partial replacement of portland cement with a pozzolan such as low calcium fly ash, ground

  • Concrete Deterioration Caused by Sulfuric Acid Attack

    The method of predicting deterioration of coated concrete when subjected to sulfuric acid and sulfate attack has not yet been established. It is understood that the depth of deterioration of concrete due to sulfuric acid attack is proportional to the square root of the exposure time. This relationship is based on results of laboratory tests where specimens are continuously immersed in acid

  • Sodium Sulphate Effect on Cement Produced with

    The resistance of concrete to sulphate attack is determined by several factors, such as water/cement, Soluble sulphate in soil, wt. percent: Concentration in water, ppm: Mild : 0.00–0.10: 0 to 150 : Moderate : 0.10–0.20: 150 to 1500: Severe : 0.20–2.00: 1500 to 10000 : Very severe: 2.00–more: 10000 or more: Table 1 . Severity of sulphate content . The availability of lime in cement

  • EFFECT OF SULPHATES IN THE PRESENCE OF WATER ON THE

    Acid solutions which attack cement mortars by dissolving part of the hard cement paste do not cause any expansion but weaken the material by removal of the cementing constituent and eventually soft and mushy mass is remains H.Y.Ghorab et.al [6] has investigated; the effect of natural available water on setting time of hydraulic cement. From studies, it is reported that, setting time of OPC

  • BS 1377 Part 3 Chemical Tests | GEO Site & Testing

    Concrete Cube Coring Drilling ; Expand. Other Items. Expand. BS 1377 Part 3 Chemical Tests BS 1377 Part 3 & BRE Chemical and electro-chemical tests . Item: UKAS: Description £ Unit: 3.02 : Acid Soluble Sulphate BS 1377:1990 Part 3 : 5.2 : 10.50 per test : 3.13 : BRE Full Suite includes pH, water & acid soluble sulphate, total sulphur, magnesium, chloride and nitrate BRE BR279 : 29.40 per

  • Acid sulfate soils | NSW Environment, Energy and Science

    The acid and released metals can have many damaging effects: Sulfuric acid can corrode concrete, iron, steel and some aluminium alloys. Toxic water and dust – Acid sulfate soil and water can irritate your skin and eyes. Drinking acidic water may make animals ill. Acid sulfate soils have economic impacts on most industries on the NSW coast, including: recreational fishing; commercial

  • Effect of Chloride and Sulfate Contamination in Soils on

    Effect of Chloride and Sulfate Contamination in Soils on Corrosion of Steel and Concrete OMAR SAEED BAGHABRA AL-AMOUDI, SAHEL N. ABDULJAUWAD, RASHEEDUZZAFAR, AND MOHAMMED MASLEHUDDIN The durability performance of plain and blended cements in sab­ kha soils ( oils contaminated with h.igh concentrations of chloride and ulfate salts) was investigated. Specimens

  • Chloride limits in the ACI 318 Concrete Construction

    tested by the acid-soluble test method, the amount is taken as 0.20% chloride ion by weight of cement, or for the same cement content, 1.2 pounds of chloride ion per cubic yard. To understand the rationale for the proposed revisions, let’s first look at the limits in the current code require-ments. Table 1 gives the current limits in Table 4.4.1 of 318-95. These are the values many of you