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Concrete mix ratio by mass and w/c ratio.

Concrete mix ratio by mass and w/c ratio.

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Figure 1: Sample systems of a standard section of a precast slab.
Figure 2: Four-point bending flexural test to determine the mechanical...
Figure 3: Average values registered at failure of joists: (a) load, (b)...
Figure 4: Failure modes of prestressed joists with different steel...
+10 Figure 5: Average values registered at initial appearance of cracks of...
Theoretical and experimental analysis of precast slabs composed of pre-stressed joists
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  • Sep 2022
The composite precast slabs are composite systems, in which they are constituted by concrete joists (reinforced or prestressed), filling components and a solidarization layer in reinforced concrete. It is a construction system widely used in the world, mainly in Ibero-American countries, such as Brazil and Spain, for example. However, there is stil...
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Context 1
... characteristics and the mix ratios of the concrete samples of the study are shown in Table 1. Concretes were of classes C35 and C30 for use in joists and concrete cover, respectively, as noted in standards ABNT NBR 6118 [13] and ABNT NBR 8953 [17]. ...