Chloride And Sulphate Content In Concrete-GOLD MINING


Chloride and sulphate concentration in concrete exposed to .

A normal weight concrete of 50 MPa NWC50 and a total lightweight concrete of 50 MPa LWC50 compressive strength were cast and tested. The mix proportions, strength and modulus of rupture development, and water, carbon dioxide, chloride and sulphate penetration after 3 years of exposure in hot humid ambient conditions after different initial curing periods have already been reported .

Determining Chloride Content of Concrete The Virginia Ready .

ACI 318-19 section provides two alternatives for determining the chloride ion content of concrete: 1 calculate the chloride ion content based upon the total chloride ion content of the concrete materials and mix proportions, or 2 test for water-soluble chloride ion content in accordance with ASTM C1218.

Chloride limits in the ACI 318 . - Concrete Construction

chloride ion Cl- content chloride corrosion in concrete, percent by threshold 0.15% weight of cement by weight of cement Prestressed concrete 0.06 40 Reinforced concrete exposed to chloride in service 0.15 100 Reinforced concrete that will be dry or protected from moisture in service 1.00 666 Other reinforced concrete construction 0.30 200 .

Sulfate Resistance and Chloride Penetration Characteristics .

High-strength concrete made with silica fume blending showed the best sulfate resistance in a sodium sulfate environment and the worst performance in a magnesium sulfate environment. Also, the normal 0.58 w/c ratio of 300 kg/m 3 cement content mix showed 1.5 times better performance than the 0.36 w/c ratio 450 kg/m 3 cement factor mix in .


resistance of concrete to chloride ion penetration can be improved by reduction of the water-cement ratio. The content of chloride ion is higher in concrete stressed in tension than in unstressed concrete. For concrete stressed in compression, chloride content depends on stress level. Salt solution immersion is more severe than salt spray.

Permissible Levels of Chlorides and . - Concrete Construction

Q. We& 39;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& 39;t know how to evaluate these numbers because ASTM C 33, "Standard Specifi ion for Concrete Aggregates," doesn& 39;t give limits for them.

Chloride in concrete BS 8500

Chloride in concrete BS 8500 BS 8500 Concrete – Complementary British Standard to BS EN 206 requires that concrete should have a maximum chloride ion content by mass of cement depending on certain criteria. This is expressed as a chloride class e.g. Cl 0,40 The use of a comma , instead of a full stop . is how it is expressed in the main .


6.4 Using the results, create a calibration curve for chloride and sulfate ions. 7. CHLORIDE AND SULFATE CONTENT 7.1 Pipette 50 mL of the filtered sample into a 500-mL volumetric flask, and dilute to the mark. Shake the dilution well to ensure a homogenous mixture. Note 6—This dilutes the sample by a factor of 10. If very high concentrations are

Effect of Combined Sulfate-Chloride ttack on Concrete .

Effect of Combined Sulfate-Chloride ttack on Concrete Durability- Reiew.. Ramezanianpour, E. Riahi Dehkordi * Ciil Engineering, mirkabir niersity of Technology, Tehran, Iran ABSTRACT: Chloride and sulfate ions damage the reinforced concrete in marine enironment due to the corrosion and formation of expansie products, respectiely.

Autogenous Healing; Ingress of Chloride and Sulfate through .

Accumulation of more chloride is found in the vicinity of the unhealed wider cracks > 0.5 mm , especially for slag cements with a high amount of slag content. Sulfate ingress was limited over a very thin region from the crack plane. Interestingly, chloride concentration at the sulfate rich region is remarkably low.


Specifi ions usually put upper limits of SO 3 content in cement, aggregate and concrete. The upper limit of SO 3 content is calculated assuming that sulfates from all concrete ingredients have the same effect. Based on the results of an extensive experimental program, it is suggested to adopt the effective sulfate concept.


chloride and sulfate ions. Note 5—Follow the manufacturer’s recommendation for ion chromatograph operation. 7.5 Obtain chloride and sulfate contents in ppm as determined by the ion chromatograph. Use conversion factors to convert to ppm chloride and sulfate content in the original sample.

PDF Analysis of total chloride content in concrete

Theoretical and measured total chloride in the actual concrete mixtures: A water chloride content is 250 ppm, B water chloride content is 750 ppm, and C water chloride content is 1250 ppm.

Evaluation of Chloride Limits for Reinforced Concrete Phase A

This involves calculating the total chloride content based on measured chloride content of the materials and the concrete mixture proportions. If the calculated total chloride content is less than the specified limit, there is good assurance that the water-soluble chloride measured on hardened concrete will comply and this testing may be avoided.

PDF Effect of moisture, chloride and sulphate contamination .

Further, the electrical resistivity decreases with an increase in the sulphate content. For example, the electrical resistivity of concrete with a sulphate content of 28.8 kg/m3 and 2.4 kg/m3 chloride, at 2% moisture content, was 12.7 kOhms-cm Figure 5 compared to a value of 20 kOhms-cm when only chloride was present.

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Chloride And Sulphate Content In Concrete