A typical concrete mixture for sidewalks in Basra has a concrete compressive strength of 30 MPa. The same mixture is to be used for sidewalks in Moscow, where the concrete may experience freezing and thawing cycles. Because of these cycles, 7% of air-entraining admixture is added to the concrete mixture. What is the reduction in strength due to these admixtures? What would be the strength of this concrete after adding the air-entraining admixture? Please note that 5% of air-entraining admixtures can reduce the strength up to 25%. Write down the answers only. *
A typical concrete mixture for sidewalks in Basra has a concrete compressive strength of 30 MPa. The same mixture is to be used for sidewalks in Moscow, where the concrete may experience freezing and thawing cycles. Because of these cycles, 7% of air-entraining admixture is added to the concrete mixture. What is the reduction in strength due to these admixtures? What would be the strength of this concrete after adding the air-entraining admixture? Please note that 5% of air-entraining admixtures can reduce the strength up to 25%. Write down the answers only. *
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A typical concrete mixture
for sidewalks in Basra has
a concrete compressive
strength of 30 MPa. The same
mixture is to be used for
sidewalks in Moscow, where
the concrete may experience
freezing and thawing cycles.
Because of these cycles, 7%
of air-entraining admixture
is added to the concrete
mixture. What is the reduction
in strength due to these
admixtures? What would be
the strength of this concrete
after adding the air-entraining
admixture? Please note that 5%
of air-entraining admixtures can
reduce the strength up to 25%.
Write down the answers only. *
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