This standard does not establish the general conditions required in the designs, execution, control and acceptance of concrete structures, which should be determined from the relevant brazilian standards abnt nbr 6118, abnt nbr 14931, abnt nbr 7187, abnt nbr 9062, abnt nbr 6122, abnt nbr 12655, abnt nbr 7212 or other. Comments for report cards free download as word doc. Among the factors that cause the degradation of reinforced concrete, the ingress of chloride ions stands out. Aug 17, 2017 this standard does not establish the general conditions required in the designs, execution, control and acceptance of concrete structures, which should be determined from the relevant brazilian standards abnt nbr 6118, abnt nbr 14931, abnt nbr 7187, abnt nbr 9062, abnt nbr 6122, abnt nbr 12655, abnt nbr 7212 or other. The concrete was pumped vertically in a uniform layer, 30 cm thick, and the compacting was carried out using four internal vibrators according to abnt nbr 14931. This part of the standard establishes the requirements for substances and materials that are used in chemical games that are not games of experiments. A porous concrete has a higher degree of water and aggressive permeability agents, which can cause deterioration of the reinforcement for mechanisms such as corrosion, besides not ensuring the watertightness, for example, on slabs under. Chloride attack evaluation on concrete compositions. Critical analysis of the brazilian national standard for. The abnt 2 brings a reference attachment to help choose the infiltration type mention in section 0, although the designer is free to use the methodology that is considered the most suitable. Chloride attack evaluation on concrete compositions according.
Brazilian territory is free from some nature disasters. Nbr 7212 readymixed concrete nbr 6123 wind loads nbr 9062 design and execution precast concrete structures eb 758. Methods to determine corrections to obtain the free field response of a sound level meter iectr 62222. Abnt nbr 15823 concreto auto adensavel comunidade da. Pdf brazilian standard nbr 7212 sets a time limit of 150 minutes for a concrete load to be discharged in full.
As the concrete joints were the major points of attention to ensure the watertightness of the structure, joint sealing tape or hydro expansive. Abnt nbr 12655 preparation, control, receipt and acceptance of. The operations of placing and compacting were carried out almost simultaneously. Scribd is the worlds largest social reading and publishing site. Concreto e argamassa determinacao da resistencia a tracao por. Dutos fabricados em paineis preisolados em vigor 04. Brazilian standards nbr 7212, nbr 6118 and nbr 15575 stipulate a time limit of 150 minutes for a concrete load to be dischargedapplied completely, concrete has strength and durability. One of the factors that affect the concrete structures durability is the corrosion in reinforcement steel. This phenomenon reproduction in laboratory is difficult because of its time.
O abatimento seja igual ou superior a 10 mm o abatimento seja corrigido em ate 25 mm o abatimento, apos a adicao, nao ultrapasse o limite maximo especificado o tempo entre a primeira. Abnt nbr 12655 preparation, control, receipt and acceptance of concrete plain, reinforced and prestressed. The abnt standard nbr 7212, says in the section on the acceptance or rejection, that it cannot be refused if does not satisfy, at least, one of the specifications of the order. This paper presents the main differences between the new coming version of the brazilian standard on lightning protection abnt nbr and iec. Abnt nbr 119004 20160406 terminations for steel wire ropes part 4. Case study of permeabilityreducing admixture use in anti.
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