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Permissible Levels of Chlorides and Sulfates in Aggregate

Q We're 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 don't know how to evaluate these numbers because ASTM C 33 Standard Specification for Concrete Aggregates


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DETERMINATION OF SOLUBLE SULPHATE CONTENT IN SOIL (IS

May 07 2015Determination 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


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sulfate contents in fine aggregate to concrete

IS536 qxd - The Portland Cement Association The risk of corrosion increases as the chloride content of concrete increases particularly aggressive to concrete because the calcium sulfate formed from the of concrete wears the fine and coarse aggregate are exposed and abrasion


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Soundness Test on Aggregates

Carefully graded and weighed test samples of aggregates soak into either sodium sulphate or magnesium sulphate solution and oven dried it under specified conditions The growth of salt crystals in the pores of the test sample is considered to produce disruptive internal forces similar to the action of freezing of water or crystallization of salt


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Reduce CHO Cell Aggregation

Reduce CHO Cell Aggregation Chinese Hamster Ovary (CHO) cells are widely used in large-scale culture These cells have conventionally been grown as attached cultures but they will also grow in suspension a property which has allowed for relatively simple scale up


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BS 812

Purchase your copy of BS 812-117 1988 as a PDF download or hard copy directly from the official BSI Shop All BSI British Standards available online in electronic and print formats Standard a part of the BS 812 series describes the method for the determination of the water-soluble chloride salt content of aggregate


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Influence of the sulphate content of recycled aggregates

Oct 15 2014Influence of the sulphate content of recycled aggregates on the properties of cement-treated granular materials using Sulphate-Resistant Portland Cement Influence of the sulphate content of recycled aggregates on the properties of cement-treated


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Alkali

In addition lithium compounds have been used to reduce ASR Although potentially reactive aggregates exist throughout North America alkali-silica reaction distress in concrete is not that common because of the measures taken to control it It is also important to note that not all ASR gel reactions produce destructive swelling


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Aggregates testing equipment Controls

Mineral aggregates are used in all fields of the construction industry to produce bituminous misture concrete mortars to be used in structures fill materials railway ballast etc For this reason we have given particular attention to all testing methods


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sulfate sulphate content aggregates washing

Innovative solutions for the use of high sulfate content Innovative solutions for the use of high sulfate content materials as aggregates for concrete Chaussadent T 1* Colas J Divet L aggregates have a high sulphate content of 3 47% of SO


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Chloride limits in the ACI 318 building code requirements

in Concrete " recommends lower maximum values basing its case pri-marily on a comparison of the chlo-ride-content limits currently in ACI 318-95 with a value called the chloride corrosion threshold Corrosion threshold inside these aggregates don't contribute to corrosion


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Alkali–silica reaction

Limit the reactive silica content of the aggregate Certain volcanic rocks are particularly susceptible to ASR because they contain volcanic glass and should not be used as aggregate The use of calcium carbonate aggregates is sometimes envisaged as an ultimate solution to avoid any problem However while it may be considered as a necessary condition it is not a sufficient one


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101214

Calcium Sulphate is used to improve soil quality 3 The most important applications are 4 for the reclamation of sodic soils through ion exchange (calcium replacing sodium) to reduce run-off water and its resulting erosion in dry agricultural areas as an ameliorant for acidic subsoils and soils in forestry


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Sulphate reduction by aggregates of sulphate

Read Sulphate reduction by aggregates of sulphate-reducing bacteria and homo-acetogenic bacteria in a lab-scale gas-lift reactor Bioresource Technology on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips


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Feasible use of recycled concrete aggregates and crushed

The results were similar between natural and recycled concrete aggregates with water soluble sulphate content values of 0 025 and 0 032 g/L respectively However the water soluble sulphate content of crushed clay brick was much higher than those of natural and recycled concrete aggregates where a value of 0 206 g/L was obtained


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Sulphate content Soil testing equipment Controls

Sulphate test strip detection range 200 to 1600 mg/l Useful for preliminary assessment of sulphate ions in aqueous solutions Weight approx 10 g Laboratory method - Ion exchange apparatus (BS 1377 3) Used for determining the sulphate content of ground water and aqueous soil extracts


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sulfate sulphate content aggregates washing

reduce sulphate content in aggregates - azzurrosportingclub Popular Searches Influence of the sulphate content of recycled aggregates reduce sulphate content in aggregates Request PDF on ResearchGate | On Oct 1 2014 F Agrela and others published Influence of the sulphate content of recycled aggregates on the properties of cement


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Effect of Chloride and Sulfate Contamination in Soils on

cement to resist deterioration due to sulfate salts The struc tural components placed in sabkhas however are subjected to both sulfate and chloride attack In such situations use of Type V cement though providing adequate protection against sulfate attack fails to remove free chlorides from concrete


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BS EN 12620 2013 Aggregates for concrete

- Classification of the constituents of coarse recycled aggregates - Sulfur containing compounds - Acid-soluble sulfate - Total sulfur - Water soluble sulfate content of recycled aggregates - Chlorides - Carbonate content for concrete pavement surface courses of fine and all-in aggregates -


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SOUNDNESS OF AGGREGATE BY USE OF SODIUM

SOUNDNESS OF AGGREGATE BY USE OF SODIUM SULPHATE OR MAGNESIUM SULPHATE LS-606 C88 APPARATUS 1 Ovens Oven # 1 Oven # 2 Manufacturer? Identification #? Dimensions? Type? Maintains temp of 110 5C? Good physical condition? RATE OF EVAPORATION TEST Rate is at least 25 g/hour for 4 hours with 500 g of water at 21 2C


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sulfate sulphate content aggregates washing

Dec 17 2012Testing of industrial products – Aggregates for construction The acid-soluble sulfate content of the combined aggregates for concrete shall not exceed 1 0% SO 3 for slags and 0 2% SO 3 for aggregates other than slags More detailed


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LIMITS FOR PHYSICAL CHEMICAL MECHANICAL

2 Aggregates that are deleteriously reactive with the alkalis in the cement in an amount sufficient to cause excessive expansion of concrete shall not be used 3 Aggregate shall be mechanically washed to remove salts other impurities in order to meet the requirement specified ( contractor) COMBINED AGGREGATE 1


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The combined effect of chlorides and

The combined effect of sulphates present in aggregates and high levels of chloride ions in the mixing water on some properties of concrete was studied Different amounts of sulphates in sand (0 38 0 50 0 75 and 1 0% SO 3 ) with chloride contents in water (50 750 1000 3000 and 6000 p p m as Cl − )


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Method of Test for DETERMINING TOTAL MOISTURE AND

Sample determine moisture content If a representative portion in accordance with The following minimum sizes will A Fine Aggregate – 500 g B Coarse Aggregate – 10 lb C Lightweight Aggregate – 2000 g V Procedure A Place wet material in a drying pan of known tare weight


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METHOD OF TEST FOR SOUNDNESS OF AGGREGATES BY

METHOD OF TEST FOR SOUNDNESS OF AGGREGATES BY USE OF MAGNESIUM SULPHATE 1 SCOPE CSA A23 2-9A Soundness of Aggregate by Use of Magnesium Sulphate 3 APPARATUS 3 1 SULPHATE TANK A suitably constructed three-compartment tank one compartment for To reduce


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Lafarge Sulfate Resistant

Lafarge Sulfate Resistant is a Portland-fly ash cement with a high sulfate resistance and a moderate heat of hydration conforming to BS EN 197-1 CEM II/B-V 42 5N It is a quality-assured BS EN 197-1 CEM II cement and carries the CE mark Available in 25kg paper bags Lafarge Sulfate Resistant Lafarge Sulfate Resistant below ground application


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sulphate and chloride contents of concrete aggregates

Sulphate content of fine aggregates Sulphate content of fine aggregates Products As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size-reduction requirements including Sulphate content of fine aggregates quarry aggregate and different kinds of minerals Get price


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Testing of industrial products

The acid-soluble sulfate content of the combined aggregates for concrete shall not exceed 1 0% SO3 for slags and 0 2% SO3 for aggregates other than slags The materials used in the cross-testing experiment gave overall average sulfur contents of 0 06% in


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Aggregate Testing

Since beginning Admaterials has provided imported aggregate testing for the following tests as required by BCA Petrographic Examination (ASTM C295) Alkali Silica Reactivity–Mortar Bar Method (ASTM C1260) Water Soluble Chloride Content (EN 1744-1 Clause 7) Acid Soluble Sulphate Content (EN 1744-1 Clause 12)


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Guidelines for Treatment of Sulfate

Research has revealed the rate of the reaction is due to the particle size of the sulfate crystals (finer grained sulfates = faster reaction) and the amount of water present in the system (more water = faster reaction) Sulfate-induced heave has surfaced around the state as well as the country


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