This document summarizes presently to be had information regarding excessive energy concrete (HSC). themes mentioned comprise number of fabrics, concrete combination proportions, ordering, batching, blending, transporting, putting, quality controls, concrete homes, structural layout, monetary concerns, and purposes.
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Extra info for ACI 363R-10 - Report on High-Strength Concrete
1. Tests show that for lower-strength concrete, even the reduction in confinement stress for larger-diameter columns will produce a column with very large strain capacity without significant loss of resistance. 1—Comparison of spiral requirements per ACI 318-05 dc, in. (mm) Ag/Ac ρs ρs fy /fc′ s, in. (mm) fc′ = 3000 psi (21 MPa) (No. 17 (81) fc′ = 10,000 psi (69 MPa) (No. 67 (68) of confinement stress produces a column with virtually no post-peak strain capacity. Even the higher confinement stress associated with the smaller-diameter HSC column produces a column with the undesirable characteristic of a sharp drop off of resistance immediately after peak stress (Martinez et al.
95. For a triangular distribution with a peak stress of fc′ and a compressive stress block extending to the neutral axis, values of k1, k2, and k3 are equal to 1/2, 1/3, and 1, respectively. 667 for the triangular distribution, and considering that α1 is equivalent to k1k3/2k2 (as shown in Fig. 75. 363R-40 ACI COMMITTEE REPORT Fig. 4—Proposed values of β1 as a function of concrete compressive strength. Fig. 5—Effect of compressive stress distribution shape on calculated flexural capacity. The effect of the shape of the compressive stress distribution on the calculated flexural capacity can be seen in Fig.
11-5), shown below as Eq. (7-15) and Eq. 3 f c ′b w d ⎝ Mu ⎠ 7 (fc′ in MPa) are conservative for both normal- and high-strength concrete (Kong and Rangan 1998; Mphonde and Frantz 1984, 1985; Pendyala and Mendis 2000; Russell and Roller 1990). Research has also indicated, however, that the level of conservatism in the ACI 318 Vc prediction decreases as the concrete compressive strength increases (Pendyala and Mendis 2000). This trend is generally attributed to a reduction in aggregate interlock for HSC.
ACI 363R-10 - Report on High-Strength Concrete by ACI