Question
Download Solution PDFHigh Strength Concrete (Grade M70 and above) has several distinguishing properties that separate it from normal strength concrete. Which of the following is NOT a characteristic of High Strength Concrete?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Characteristics of High Strength Concrete
High Strength Concrete (Grade M70 and above) possesses certain notable properties which distinguish it from normal strength concrete. These properties include:
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High durability: This type of concrete has enhanced durability due to its dense microstructure and lower water-cement ratio.
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Reduced permeability: The dense microstructure also results in lower permeability, making the concrete less susceptible to water ingress and chemical attacks.
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Increased shrinkage: Despite its advantages, high strength concrete can experience increased shrinkage due to its lower water content and higher cementitious material content.
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Lower cement content: This is not a characteristic of high strength concrete. In fact, higher grade concrete generally requires more cementitious materials to achieve the desired strength and durability.
Analyzing the Given Options
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"High durability" (Characteristic)
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High strength concrete is known for its enhanced durability due to its dense microstructure and low porosity.
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"Reduced permeability" (Characteristic)
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The dense microstructure of high strength concrete results in lower permeability, reducing the risk of water and chemical ingress.
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"Increased shrinkage" (Characteristic)
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High strength concrete can experience increased shrinkage due to its lower water content and higher cementitious material content.
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"Lower cement content" (NOT a characteristic)
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High strength concrete typically requires more cementitious materials to achieve the desired strength, making this statement incorrect.
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