Construction Materials, Methods and Techniques (MindTap Course List)
4th Edition
ISBN: 9781305086272
Author: William P. Spence, Eva Kultermann
Publisher: Cengage Learning
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Chapter 3, Problem 8RQ
What is the most common form of chemical degradation?
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Compute for the stresses (initial, const and final stage)
and check for compliance in NSCP provisions.
Also compute the following:
1. Compute and check if the section is Uncracked,
Transition or Cracked as per NSCP.
2. Compute for its flexural capacity and check if it
could carry the given load.
BEAM SECTION
NOT TO SCALE
1400mm
300 $1098 400 */ 400*300*
300
200
300
100
ORIGINAL SECTION/PRECA
CAST-IN-PLACE (CIP) PART
PRECAST
LOADING AT SERVICE
M
• 21 KN (DEAD LOAD ONLY)
21KN
4.75m
9.25m
CIVEN DATA
STRANDS:
12-02 AT 120KN/STRAND (GOMM FROM BOTTOM)
8-2 AT 120HN/STRAND (120mm FROM BOTTOM)
fc 42.5 MPa (BEAM)
fc 38 MPa (CIP)
f'a = 80% or fa
fp-1860 MPa
ESTRANDS 1976Pa
OONG 23.6/m³
LOES 1-8%
Loss 18%
APPLY 3M LIVE LOAD AT CONST. PHASE
Please explain all your steps. Thank you.
10000
Quizl:Design a grit chamber for a horizontal velocity 250 mm/s, minimum flow
5,000 m³/day, maximum 20,000 m³/day, average flow is 12,500m³/day, S.O.R=
0.017 m/s, For a parabolic channels A =2/3 WD, detention time = 1 min
Q
Ac == HxW
vs for inorganic particles = SOR
As = LxW
As
V=Qxt=LxWxH
Z=CxW2
Q (m³/day) |
Ac (m²)
W (m)
| Z (m)
Chapter 3 Solutions
Construction Materials, Methods and Techniques (MindTap Course List)
Ch. 3 - What are the major material groups?Ch. 3 - Prob. 2RQCh. 3 - What are the mechanical properties that define a...Ch. 3 - How does a tensile stress differ from a...Ch. 3 - Prob. 5RQCh. 3 - Prob. 6RQCh. 3 - Prob. 7RQCh. 3 - What is the most common form of chemical...Ch. 3 - Prob. 9RQCh. 3 - Prob. 10RQ
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- Can you please explain how to draw the shear and moment diagrams. Thank you.arrow_forwardQ2: Design an activated sludge process to treat a waste flow of 15000 m³/day with a BODs of 180 mg/L following primary treatment. The effluent BOD, and SS are to be 20 m mg/L. Assume Xr = 15000 mg/L, X = 2500 mg/L, 0c = 10 day, Y = 0.60, kd=0.05. Determine 1- the reactor volume, 2- the Sludge production rate, 3- the circulation rate, 4- the hydraulic retention time, and 5- the oxygen required? C₁-Ce C 1 XV = 1 +0.532 QxC₁₂ VXF F= - 1+r (1+0.1r)² = Qr= dt Өс Qx Xr-X V R = [= Q YQ(So-S) Oc dx XV 1+Kd0c O₂demand =1.47 (So-S)Q-[1.14Xr(Qw)] Qw total sludge production/X, S = BOD, effluent - 0.63 * SS Warrow_forwardمارت حولة ملانول 60 Design Deceleration tank and screen for W.W.T.P of flow-144000 m² day Design Data: D.T=1-3 min 1-3b, d=1-1.5 m 60 Design Data: velocity= 0.6: 1.5 m/sec . A-Qdfv=b.d, b=2d 233 Design Data: bars used circular of p= 1.5:3 cm. rec. of (1:2 cm) x (2:6 cm) spacing between bars 2.5:5.0 cm fine screen, 2.5 7.5 cm coarse screen Sloping angle on hz (6)=45:60 = depth of water depth in approaching channel=d = ⚫nbars nspacings +1 ⚫b=nbars xo+nspacings I spacing net inclined area = 2 Aapproach channel=nspacing. spacing. L. 1=d/ sin Check: = 1.13 C 2.56 1134(6.05 P. 45.30 *velocity just befor the screen=v₁ = Qa(m³/sec) screen-b.d ≥ 0.6 m/sec. * velocity through the screen=v2 16mm use 2 Qa(m³/sec) nscreens (spacings Spacing).d ≤1.5 m/sec IsP. 22-65 12²² head losses = Ah = 1.4 x ≤0.1 m 2g bav usp = Ubar Q 23.65 k 148.72arrow_forward
- Q1: Design of trickling filter system single-stage with 3m depth, effluent BOD, of 20 mg/l, influent BODs =250mg/l, flow = 2.63 m³/min and hydraulic flow rate or hydraulic loading rate 25 m/day, r=3arrow_forward04 Q4 A waste effluent of 1.25 m/s with BOD, 183 mg/L, DO=0 mg/L and T = 20 °C is to be discharged into a river of 8 m³/s flow, BOD, = 2mg/L, DO -9.14 mg/L and T= 15 °C. At 20 °C, (K₁) is 0.3/day and (K2) is 0.9/day. The average velocity of the river is 0.8 m/s. 1) Is DO min within the environmental limitations? 2) At what distance is the maximum deficit located. 3) Draw the oxygen sag curve? Given the saturation concentration at 15 °C and at mixed temperature = 10.15 mg/Larrow_forwardCalculate 1- the effluent BOD, of a two-stage trickling filter with the following flows, BOD, and dimensions? Q-5000 m³/day, influent BOD,-280 mg/L, volume of first filter-1000 m³, volume of second filter-800 m³, filter depth-2 m, r₁=1, z=1.25. Also, 2- calculate organic loading rate (BOD, kg/day) 3- Hydraulic loading (m³/m²/d), 4- efficiency of each stage 5- overall removal efficiency.arrow_forward
- Q3: Determine the force in each member of the shown truss, and state whether they are tension or compression. 40 kN 3 m 10 kN A 25-1.25 m m -3.5 m- 3 m Barrow_forwardQ3 Design a secondary clarifier for an activated sludge process with a recycle rate of 25 percent, a MLSS conc. 2500 mg/L, peak flow 9,000 m²/day, depth of tank 3 m and solid loading rate = 4 kg/m²/hrarrow_forwardA- Design grit removal chamber for a W.W.P with hourly flow equal 5000 m'h 410 markarrow_forward
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