Section 00595 - Reinforced Concrete Box Culverts

ovariesracialUrban and Civil

Nov 25, 2013 (3 years and 4 months ago)

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Section 00595
-

Reinforced Concrete Box Culverts


Description


00595.00

Scope

-

This work consists of constructing cast
-
in
-
place reinforced portland cement
concrete box culverts (RCBC) and precast reinf
orced concrete box

culverts

to the lines, grades and
dimensions shown or as directed.


Materials


00595.10

General

-

Provide reinforcement and portland cement concrete according to Sections
00530 and 00540 for cast
-
in
-
place construction.
Provide reinforcement and portland cement concrete
according to AASHTO M 259M/M 259 (ASTM C
1433
/C
1433
M) or AASHTO M 273M/M 273 (ASTM C
1433
/C
1433
M) for precast construction. Provide joint seals conforming to 02440.40.


00595.11

Class of Con
crete

-

Provide Class 25
-

37.5,
or 19.0 (3500
-

1 1/2" ,
or 3/4") portland
cement concrete for cast
-
in
-
place RCBC, wingwalls and aprons and cast
-
in
-
place ends for precast
reinforced concrete boxes

unless shown other wise o
n plans
.


Provide Class 35 (5000)

-

1 1/2" ,or 3/4"

concrete for precast reinforced concrete box

culverts

unless shown
otherwise
.


Construction


00595.40

Reinforcement

-

Furnish and place reinforcing steel according
to Section 00530 for
cast
-
in
-
place RCBC. Furnish and place reinforcement according to AASHTO M 259M/M 259 (ASTM C
1433
/C
1433
M) for precast reinforced concrete box

culverts

except as shown.


00595.41

Portland Cement Concrete

-

Furnish and place portland cement concrete for cast
-
in
-
place RCBC, wingwalls and aprons and cast
-
in
-
place ends used with precast reinforced concrete box

culverts

according to Section 00540 and the following:


(a)

Placing Concrete

-

Allow bas
e slabs or box culvert footings to set at least 12 hours before
constructing the remainder of the box culvert.


When constructing box culverts 1.2 m (4 feet) or less in height, the sidewalls and top slab may be
constructed as a monolith, with sidewalls con
structed full height. If this method is used, place construction
joints vertical and at right angles to the axis of the culvert.


When constructing box culverts more than 1.2 m (4 feet) in height, place concrete in the walls to at least the
bottom elevati
on of the top slab. Allow three days before placing the top slab according to 00595.41(b).


Construct each wingwall as a monolith.


(b)

Removal of Forms and Falsework and Subsequent Loading

-

Do not remove forms and
falsework or place subsequent loads unt
il the following conditions are met:



Form and Falsework Removal

Counting Days
1



Stems and walls

................................
................................
........

1


Top Slabs

................................
................................
.................

10



Subsequent Loading
2

Counting Days
1



Stems and walls over 1.2 m (4 feet) in height

............................

3


1

From the time of the last placement of concrete
in the forms or falsework supports and
excluding days when the surrounding temperature is below 4

C (40

F) for eight hours or
more.


2

Except loads from form work and reinforcing steel for further concrete placements.


(c)

Concrete Finish

-

All exposed c
oncrete surfaces shall receive a general finish

according to
00540.53(a)
.


00595.42

Portland Cement Concrete for Precast Box

Culverts

-

Furnish and place portland
cement concrete for precast reinforced c
oncrete box

culverts

according to AASHTO M 259M/M 259 (ASTM
C
1433
/C
1433
M) except as shown. A production run shall be considered continuous if not interrupted for
more than three consecutive days.


00595.45

Joint Seals for Precast Boxes

-

Provide a continuous flexible watertight seal in the joint,
on the sides and top, between each precast reinforced concrete box section.


Measurement


00595.80

General

-

Reinforced concrete box culverts will be

measured on the length basis, along
the centerline of the box culvert, f
rom end to end of the box.


Wingwalls and aprons will not be measured, but considered a separate lump sum item.


Concrete and reinforcement used in box culverts will not be measured s
eparately, but are incidental to the
work under this Section. Estimated quantities of concrete and reinforcement will be shown in the Special
Provisions.


Payment


00595.90

General

-

The accepted reinforced concrete box culvert will be pai
d for at the Contract
unit price per meter (foot) for the item "Reinforced Concrete Box Culvert".


Wingwalls and aprons will be paid for at the Contract lump sum amount for the item "Wingwalls and Aprons"
according to 00595.80.


Payment will be payment in
full for furnishing and placing all materials and furnishing all equipment, labor
and incidentals necessary to complete the work as specified.