Question

1. You want to determine the lateral pressure of fresh concrete for a 15 ft tall column. The concrete has a density of 145 lb/ft with a slump of 4 in, and a temperature of 66 °F. The mixture it contains a cement blend with 30% fly ash and retarders. Internal vibration will occur in intervals less than 4 ft in depth. Determine the lateral pressure and draw the pressure diagram if the concrete is placed at 15 ft/h. Check for minimum and maximum pressures.

Answer 1

Ans Given data Column =IS ft Height 2 14s Lb) ft Conueli 4 inch, slunp Tempeatu -66F Frameuork for Conuele ACI -347-04 Guideline to t0 Acconding 175 mm or (6.89 ina), less than For Cenceti witn Alunp Value less tne 1.2m a cepth vibration nomel witn Pressue lalual 7.2+ 78SR Pmar- Cw. Ce T+17-80 whre Cw= Coepficient it weight cCotriciat chnitry RE Conut pla lanent rate m/h (inqutien =4.57/h) 1.2192M/h TE L Tinpeatu (66F=18.9e) from table 4.2.2.1a (c), Pov unit wt. Coettident C n 145h/ peto 2.322 . 6g 2, Denity Conule Cw= 1 - Frm ACI 347R-14, Table 4.2.2.1 a(b), Cc = 1.4 7-2 785x 1,2192 Pruay 1 x L.4 NOw, 18.88+17.8 46.60KPA 1 = 46.60 x 20-89 blft ר6 q.3ד p'.

Mininuin pren e 30Cw KPa G26.7 pst Par 30 x1= 30KPA= Marinu pmu 2322.68x9.81x 6.71 192890.64 I2.89 1Pa-3193 8 Psf 7Pax Prenur aue Corect Pmor 973.67 145 isf 973.67pst