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Why permissible compressive strength decreases with increase in grade of concrete?
Wiki User
∙ 10y ago
it Gives Better estimation and assumption on how much it could carry. By logic, higher strength concrete is used on larger loads therefore, it is still not sure if the loads will be larger than the specified concrete strength. Therefore, having lower permissible strenth helps designers to have allowances for loadings to ensure safety
Wiki User
∙ 10y ago
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Micro structure of concrete with nano materials gets changed like anything and is resulting tremendous increase in compressive strength apart from increase in specific surface area.
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How does nano concrete differ from ordinary concrete?
Micro structure of concrete with nano materials gets changed like anything and is resulting tremendous increase in compressive strength apart from increase in specific surface area.
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What is the relation between density and compressive strength of concrete?
The span to depth ratio is in place preliminary as a method of ensuring deflections falls within certain limits. As concrete is a multi-phase material and does not behave linearly, it is often complex to calculate expected accurate deflections. codes set out given span/depth ratios as a simpler method or ensuring deflections remain in given limits. These ratios have been derived empirically from testing. The compressive strength of concrete as a material does not vary with varying span/depth. However, the amount of the concrete section which is in compression will vary with span and depth due to changes in the applied moment and increase/reduction of the internal lever arm.
How do you increase slump in concrete?
If you are using a traditional concrete mix you can increase the slump by increasing the water you add.
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presure
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Why does tire pressure increase in the summer and decreases in the winter?
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