What is the maximum acceptable quantity of harmful substances in fine aggregate according to the BNT NBR 7211:2005 standard? I - The maximum accep...
What is the maximum acceptable quantity of harmful substances in fine aggregate according to the BNT NBR 7211:2005 standard?
I - The maximum acceptable quantity of harmful substances in fine aggregate is 3% of the mass of the material.
II - The maximum acceptable quantity of harmful substances in fine aggregate is 0.5% of the mass of the material.
III - The maximum acceptable quantity of harmful substances in fine aggregate is 1% of the mass of the material.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) II and III are correct.
I - The maximum acceptable quantity of harmful substances in fine aggregate is 3% of the mass of the material.
II - The maximum acceptable quantity of harmful substances in fine aggregate is 0.5% of the mass of the material.
III - The maximum acceptable quantity of harmful substances in fine aggregate is 1% of the mass of the material.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) II and III are correct.
💡 2 Respostas
Ed 
De acordo com a norma ABNT NBR 7211:2005, a alternativa correta é a letra B) A quantidade máxima aceitável de substâncias nocivas no agregado fino é de 0,5% da massa do material.
Renan Almeida
alternativa correta letra e
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