how to do sulphate and chloride in aggregate

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Q Were designing a concrete structure in Egypt and I received test results for the aggregate to be used in the concrete The report lists chloride and sulfate content but I dont know how to evaluate these numbers because ASTM C 33 Standard Specification for

64 Using the results create a calibration curve for chloride and sulfate ions 7 CHLORIDE AND SULFATE CONTENT 71 Pipette 50 mL of the filtered sample into a 500mL volumetric flask and dilute to the mark Shake the dilution well to ensure a homogenous mixture Note 6This dilutes the sample by a factor of 10 If very high concentrations are

Table 2 Chloride limits for new construction proposed by ACI Committee 222 H ow do the different test methods for chlorides differ Here’s a brief description of the three methods now being used To test for watersoluble chlorides ASTM C 1218 a sample of concrete or aggregate is crushed into a pow

SOUNDNESS OF AGGREGATE USING SODIUM SULFATE OR MAGNESIUM SULFATE TXDOT DESIGNATION TEX411A CONSTRUCTION DIVISION 2 – 11 EFFECTIVE DATE OCTOBER 2004 Larger sizes by 125 mm 12 in spread 22 Tanks with a volume greater than five times the solid volume of the immersed samples in their containers 23 Perforated containers for immersion of

Jul 17 2016 · Magnesium sulfate attacks calcium silicate hydrate as well as calcium hydroxide and calcium aluminate hydrate The consequences of sulfate attack include not only disruptive expansion and cracking but also loss of strength of concrete due to the loss of cohesion in the hydrated cement paste and of adhesion between it and the aggregate particles

May 07 2015 · Take the soil sample in a state in which it can be crumbled If necessary dry it in oven at 105 0 C to 110 0 C Break the lumps in a mortar with a rubber covered pebble Mix the sample thoroughly and subdivide it by quartering Take 10 g of soil from the sample in a 250 ml bottle with 100ml of distilled water

The sodium sulfate loss is typically between about 0 and 15 percent while the magnesium sulfate loss is typically between about 0 and 30 percent For a particular aggregate sample the sodium sulfate loss will tend to be less than the magnesium sulfate loss by 0 to 20 percent with 5

May 07 2015 · Determination of Soluble Sulphate Content Purpose Sodium sulphate is present in some soils The salt is easily hydrated and dehydrated under the influence of climatic changes There are enormous volume changes during this process of hydration and dehydration which influence the engineering properties of soils Procedure Take the soil sample in a state in which

DETERMINING CHLORIDE AND SULFATE CONTENTS IN SOIL DETERMINING CHLORIDE AND SULFATE CONTENTS IN SOIL TXDOT DESIGNATION TEX620J CONSTRUCTION DIVISION 3 – 11 LAST REVIEWED OCTOBER 2014 PART IION CHROMATOGRAPHY METHOD 3 SCOPE 31 This method for the determination of chloride and sulfate ions in water by chromatography is similar to

Dec 01 2015 · It can be seen in Fig 1 that the BS 8500 BS 85001 2006 total chloride limit for reinforced concrete that is nonheat curing and made with sulphate resistance cement 02 is nearly violated at mix M4 wc 048 even though the chloride content is less than BS 882 BS 882 1992 standardized limits for aggregate and ASTM C 94 ASTM C 94

ABSTRACT Chloride and sulfate ions damage the reinforced concrete in marine environment due tothe corrosion and formation of expansive products respectively Interaction of chloridesulfate ions onconcrete deterioration is very complicated Little research has been conducted in this this study the effect of chloride ions on sulfate attack and effect of sulfate ions on chloride

31 Waterextractable chloride when present in sufficient amount has a potential to initiate or accelerate corrosion of metals such as steel embedded in or contacting a cementitious system such as mortar grout or concrete This test method is applicable when aggregates contain a high background of naturally occurring chloride see ACI 2221–96

chloride concentration in the abkha soils are approximately five to six times as high as those in typical seawater 3 The high salt concentrations particularly those of chlorides and sulfates are highly corrosive to both concrete and steel More­ over the conjoint prevalence of chloride and sulfate

Calcium chlorides is used as accelerator in hydration process of cement leading to quick set of concrete and to get high initial strength concrete Maximum permissible limit of addition of calcium chloride is 2 in flake form Methods of Adding Calcium Chloride Calcium chloride is available as pellets or other granules flakes or in solution hellip

2 SULPHATE ATTACK AND CHLORIDE PENETRATION IN CONCRETE 21 Sulphate attack in concrete cements fly ash aggregate and adm ixtures The presence of this type is focused on the

Sulfate attack in concrete and mortar Sulfate attack can be external or internal External due to penetration of sulfates in solution in groundwater for example into the concrete from outside Internal due to a soluble source being incorporated into the concrete at the time of mixing gypsum in the aggregate for example External sulfate attack

Magnesium sulfate attacks calcium silicate hydrate as well as calcium hydroxide and calcium aluminate hydrate The consequences of sulfate attack include not only disruptive expansion and cracking but also loss of strength of concrete due to the loss of cohesion in the hydrated cement paste and of adhesion between it and the aggregate particles

Sulphate attack Most soils contain some sulphate in the form of calcium sodium potassium and magnesium They occur in the soil and ground water Solubility of calcium sulphate is low Solid sulphates do not attack concrete severely but when the chemicals are in solution they find entry into porous concrete and react with hydrated cement

Table 1 Sulfateresistant cements however like other portland or blended hydraulic cements are not resistant to most acids or other highly corrosive substances Suitable aggregatequality aggregate is not prone to freezethaw deterioration or chemical attack If an aggregate is shown by

64 Using the results create a calibration curve for chloride and sulfate ions 7 CHLORIDE AND SULFATE CONTENTS 71 Pipette 50 mL of the filtered sample into a 500mL volumetric flask and dilute to the mark Shake the dilution well to ensure a homogenous mixture Note 4This dilutes the sample by a factor of 10 If a very high concentration are