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  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    1

    PVC , Polyethylene Polyethylene Non-Prestress Concrete 2 4 ,6, 9 12 . ,

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    (Box Culvert)

    (Type of Product)

    1. 200 - 2,500 . 1,000 3,000 . 2

    2. 200 1,000 . 1,000 . 2

    3. (Box Culvert) 300 2,500 . 1,000 2,000 .

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    2

    2

    1.

    2.

    3. (end) 2

    1. 2. 4 1. . 1 2. . 2 3. . 3 4. . 4

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    1.

    1.1 -

    - 5,000

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    :

  • CPAC PRECAST PRODUCTS ------------------------------------------------------------------- 1.

    1.1

    1 .5 1

    1.2

    - . 747

    - : . 20

    1.3 (Aggregate)

    .566

    2. 2.1

    Slump Concrete Slump Strength 28

    2.2 4

    4 500 . 8 600 .

    2.3

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

  • CPAC PRECAST PRODUCTS ------------------------------------------------------------------- , 2

    2.4 (1)

    0.40 0.50 () (2)

    (3) 13 25

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    300 1000 19 25 1200 1500 19 29 1500 1750 19 32 2000 2500 25 38

    (1) 0.25

    (2) 100 9.4

    (3) 40 50

    1.

    :

    2. -

    -

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    28

    .409 28

    .1 .2 .3 .4

    42 28* 28* 28

    1.

    150 . 300 . 2. .2 1500 .

    35 3. . 3 2250

    35

    (1) (2) (3) (4) (5)

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    - 1 200 200 ( 50 ) - 4.2 5.2 6.1 6.2.1 7 2 2 - - 1 200 200 ( 50 ) - 1 3 1/3 2/3 1 1 1 15 3 2/3 1 - 6.2.2 6.2.2

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    80

    1.

    2 1 2 2

    (1) (2)

    1. (Full Flow)

    Bernoullis Theorem

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    HL = Ke gV2

    21 + Hfl1 + Kenl g

    V2

    21 + Hfl2 + g

    V2

    22 (1)

    Q = V1A1 = V2A (2) Q = (../) A = (..) V = HL =

    Ke = (Coefficient) 0.50-0.78

    Kenl = = 1 (D1/D2)2

    Hfl = L D = Manning Formula Metric System V =

    n1 R2/3S1/2 (3)

    n = n .017

    R = Hydraulic Radius = / (Wetted Perimeter) = D/4

    S = Hydraulic Gradient = Hf/L V =

    n1 R2/3(

    LHf )1/2 (4)

    V2 = R4/3 (

    LHf )

  • CPAC PRECAST PRODUCTS ------------------------------------------------------------------- Hf = 3/4

    22

    RLVn = 3/4

    22

    )4/(DLVn = 3/4

    2235.6D

    LVn (5)

    Ke ,Kenl ,Hfl1 Hfl2 (1)

    HL = gV

    278.0 21 + 3/4

    1

    211

    235.6D

    VLn + (1 (D1/D2)2) * gV2

    21 + 3/4

    2

    22

    2 235.6D

    VLn + g

    V2

    22 ..(6)

    (6) (2) HL D1 D2

    2. (Partial Flow)

    (Open Channel)

    Q = VA (3) Q =

    nA R2/3S1/2

    A = D2 R = D A R

    Q = nD 2 ( D)2/3 S1/2 = 2/3 D8/3

    nS

    2/3 = Q = D8/3

    nS

    3 ,

    1.0 D8/3 S1/2 n = 0.017 D S 1: 100 1: 5,000 1

    1/2

    1/2

  • CPAC PRECAST PRODUCTS ------------------------------------------------------------------- 1 D8/3 S1/2 S 1/100 1/500 1/1,000 1/2,000 1/3,000 1/4,000 1/5,000 0.30 .2370 .1060 .0750 .0530 .0431 .0375 .0335 0.50 .9264 .4141 .2930 .2072 .1683 .1466 .1310 0.60 1.5034 .6721 .4754 .3362 .2731 .2379 .2127 0.80 3.2374 1.4472 1.0237 .7239 .5881 .5122 .4579 1.00 5.8820 2.6294 1.8600 1.3153 1.0685 .9306 .8320 1.20 9.5712 4.2786 3.0266 2.1403 1.7387 1.5143 1.3538

    Hydraulic Gradient Hydraulic Gradient 1. 0.1 ./ 2. 0.2 ./ 3. 0.32 ./

    2 (1) (2)

    n

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    () Ditch Conduits ( Projection Conduits Complete Projection Condition Incomplete Projection Condition Plane of Equal Settlement

    (Friction Force) () (Friction Force) Wc : /. Cd : e : /3 Bd : Bc Hc : . Wp = Fi Ct Po Wp : Po : Bc : Ct : . Fi : 1.0 Po Po Fi 1.0 Impact Force

  • CPAC PRECAST PRODUCTS ------------------------------------------------------------------- Fi 1.5 2.0

    Ct 6 Ct 6 Ct 1.0 1.0 . 3.0 . Ct 10 %

    Three Edge Bearing 0.01 Three Edge Bearing 1.0

    . Impermissible = 1.1 . Ordinary = 1.5 . First Class = 1.9 . Concrete cradle = 2.2 3.4

    Impermissible Ordinary 15 . First Class 60% 30 . 15 . Concrete Cradle First Class

  • CPAC PRECAST PRODUCTS ------------------------------------------------------------------- Impermissible Ordinary First Class Concrete Cradle

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    3

    (Raw Materials)

    (Cement)

    - 1 (Type1) .15

    - 2 (Type3) .15

    (Coarse Aggregate)

    3/8 FM. 5.72-6.05 .566-2528

    (Fine Aggregate) FM. 2.50-3.50

  • CPAC PRECAST PRODUCTS ------------------------------------------------------------------- 4 .-12 .

    (Concrete Mixing Machine)

    1) Pan Type Circular Pan

    Pan Mixer Pan 2 Pan Type

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    2) Drum Type Drum

    Drum Drum Type

    (Concrete Transfer Car)

    Slump (Type of Concrete Slump)

    Slump

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    Slump

    - - -

    Slump - - -

    Slump Concrete Slump

    Non-Prestressed Product (Reinforce Concrete)

    1. 7.5 2.5 2. 7.5 2.5

    Slump

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    Mold Hydraulic Line

    1.

    Mold

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    2. 4 8 60 .

    3. Stud 5 . 8 1

    Covering 13 . 25 .

    stud

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    4.

    5.

    6. Set 2-3

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    Hydraulic

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    7.

    8. 1

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    9. Set Stock

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    4

    . . 2

    1. (Sieve Analysis)

    - - . 566-2528

    1) (ASTM C33) 2) 3) -

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    1) (Quartering Method) 2) 110 c 3) 3/8 (

    ) , 4 ,8 ,16 ,30 ,50 100

    4)

    2. - . 1736 2-2542

    - . 1736 2-2542

    1. 1) 15 x 15 x 15 . 2) 1 3) ,

    1) 2) 3 35 3)

    2.

    1) 15 . 30 . 2) 16 3) ,

    1)

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    2) 3 25 3) Cap

    Cap 1) 2 2) Cap

    1)

    2)

    1.4-3.4 3) 4)

    =

    1) ( ksc) 2) (N/mm2)

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    3.

    - . 828-2546 . 828-2546

    1) Vebe 2) 3) 4) ,

    1) Slump

    2) 4 25

    Slump

  • CPAC PRECAST PRODUCTS -------------------------------------------------------------------

    Slump

    3)

    VB TEST 4)

    - VB Test 5-30 VB Test 1 Vebe