Problem $3$

A wall form $12$ feet high, $18$ inches thick, and $91$ feet long is to be filled with normal weight concrete $(150$ pcf$)$ at a concrete

temperature of $73$ degreesF. The cement is Type $1$ without a retarder. Concrete will be placed

with internal vibration to a depth of $4$ feet or less. The concrete will be placed by pumping at a

rate of $16$ cubic yards per hour. Determine the correct lateral pressure $($psf$)$ to be used in concrete

planning and clearly identify this answer with a box around it with proper units. Sketch the lateral

pressure diagram showing all pertinent data in readable form.

Problem $4$

A column form $16$ feet high is filled with normal weight concrete at a temperature of $53$ degreesF. The cement is Type $1$

without a retarder. Concrete will be placed with a normal internal vibration to a depth of less than

four feet. The rate of placement is $8\mathrm{.}25$ feet per hour. Determine the correct concrete lateral

pressure to be used in concrete planning and clearly identify your answer with a box around it$.$

Draw the concrete lateral pressure diagram showing all pertinent data.

Eq$.5\mathrm{.}152C_{cp}=wh,$Hydostrmic Pressure $($Theresticsl$)$

sump $>7",R>15\%$ hor, wre: vibe $>4^{\text{'}}$ depth

EQ$.5\mathrm{.}15b,C_{cp}=C_C{C}_{}[150+\frac{9000R}{T}]$

sll colunis.

walls mech ix both:

$H\frac{?}{{?}_A^{\text{'}}}$

$R<mn>7</mn>$ 'hor

E$0\mathrm{.}5\mathrm{.}15$c $C_{Cp}=C_C{C}_{}[150+\frac{43,400}{T}+\frac{2,800R}{T}]$ wells mectip

$H>{14}^{\text{'}}$&

$R7-15\frac{\text{:}}{w}$

Indusiry Limits por $\frac{?}{{?}_{\frac{?}{?}}CT}$