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Presentation On Sulphate Resisting Cement

Home > PowerPoint Slides > Presentation On Sulphate Resisting Cement
Published in: Engineering
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Properties Composition Characteristics Applications

Vamsi P / Dubai

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  1. SULPHATE RESISTING CEMENT WHAT IS MANKIND USES WHY DO WE USE IT? VAMSI PUTTA PROS CONS
  2. SULPHATE RESISTING CEMENT PROBLEM? CAUSE... SOLUTION!
  3. PROBLEM Ordinary Portland cement is unable to resist sulphate attacks. Hence, the constructed work leads to expansion and subsequently disruption of the set concrete occurs. And we need to prevent it! AREAS WHERE ATTACK CAN HAPPEN.. • Wharfs and marinas • Sea walls, dams and reservoir • Water and sewage pipelines and treatment plants • Off-shore platforms • Bridges and any other submerged structures in tidal and splash zones
  4. CAUSE Ordinary PPC cement contains calcium hydroxide and hydrate of calcium aluminium and these reacts with sulphate and form calcium sulphate and calcium aluminate respectively. The byproduct obtained by reactions within the framework of hydrated cement paste results to the damage.
  5. SOLUTION The remedy of sulphate attack is sulphate resisting cement. SRC is a cement with low C3A content and comparatively lower C4AF content. (5%) So, this results in the increase in resisting power against sulphate attack.
  6. COMPOSITION What it m Sulfate Resisting Cement is a blended cement designed to improve the performance Of concrete where the risk Of sulfate attack may be present. It also provides improved durability for concrete in most aggressive environments, reducing the risk Of deterioration Of the structure and structural failure. CHARACTERISTICS PROPERTIES
  7. • C3A (10 w) (5 %) 2. C4AF(10w) (5%) 3. Calcareous material 4. Silica (high) 6. Iron Oxide COMPOSITION It's done by "indihg and intimatem•v• mixing, the resultanée•L clinker is grounded • to produce SRC€.
  8. Suez l. Maximum resistance to chloride ions - mini risk of corrosion of reinforced steel. 2. High level of concrete performance and struc integrity in highly aggressive sulphate and acidi environments. 3. Increased workability and pumpability. 4. Significantly improved later-age concrete stre CHARACTERISTICS
  9. P o P E s Property Setting Time Soundness so ISO Mortar Compressive Strength Expansion Min Max Max Max 3 Day (min) 7 Day (min) 28 Day (min) max (in Sulfate solution) AS3972 Type SR 45min 10 hrs 5 mm 3.50% 20 MPa 35 MPa 750ps Indicative Sulfate Resisting 125-200 min 3-5 hrs < Imm 15-30 MPa 25-35 MPa 50-55 MPa 100-350pS
  10. I. Foundations. APPLICATIONS 2. Piling works. 3. Chimney cooling towers. 4. Coastal protective works such as sea walls, break waters, 5. Building near seacoast. 6. Chemical industries, water storage, sumps, drainage works. 7. Suitable for underground works where Sulphate is present in the Soil and water.
  11. . Excellent protection against sulpho-aluminates . Consequent resistance against sulphate attack . Very high compressive strength (economic concrete mix desi 4. Very low heat of hydration (avoids shrinkage cracks) 5. Improved life and durability of structures 6. Improves corrosion resistance of steel
  12. 1. Not suitable where there is danger of chloride attack. This will cause corrosion of rebar. 2. Curing process should be done properly with great care for min of 8-10 days.
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