chapter 3 rigid pavement - DOT On-Line Publications - Department ...

(7).
(8).
(14).
[ii,‘- .
-_, (17).
(W.
(19).
(20).
(21.)'.
(22).
tsg- .
m l
(2%
inserts are no longer allowed as of 10/86.
For CR pavements,
AASHTO M-33.
there are four expansion Joints 930 ft.; sealant is
Depends on a Bridge Movanent Rating.
Every second transverse joint is sawed within 4-12 hours.
Sheet steel is used to form the keyway.
Plastic coatings (17 nils) and powdered epoxy resins
allowed.
(7 mils) are also
Only plain pavement joints are skewed at Z/12.
Ravclling during sawing is not allowed
preclude random cracking.
but sawing must be done to
Preformed bituminous, cork, or rubber plus compression seal.
Only plain pavement is skewed at Z/12.
Plastic coatings (11 mils)
are also allowed.
and red lead paint (no thickness specified)
Yield strength of 40 ksi and ultimate strength of 70 ksi.
Type A is low bond strength Doubl Coat by Republic Steel.
Type B is high bond strength, it.
etc. but must have bond breaker
Scotchkotr 202, Flintflex
HC-70, MS2a or RC-258.
531-6080,
At PC and PT of curves 2 deg. 30 mfn. and Orcater and at every eighth
joint constructed between 9/15 and 4/W.
Faulting occurs on plastic soils where dowels are not present.
One coat of paint conforming to Federal Spec. lT4-866 1 II or n-P-
645 or TT-P-310 or steel str. pahthg councfl tpec. S F C Paint II.
Inside 4 ft.-13.3 ft.8 centerline 3.3 ft.8 outsfde 10 ft.4.3 ft..
Inltlal sawing Ii contractors option. Sawing for joint reservoir Is
a minimum of 72 hours.
Sawing for preliminary crack control Is done on approx. 50 ft. intervals
with a l/8-in. blade and a depth of D/4. Final sawing is done within
24-36 hours after concrete Pour.
New York's minimal problems related to slab cracking and joint spalllng
result from sawing too late. Faulting problems are present only in
older pavements where a two-piece malleable iron load transfer device
was used..
Control joints (92rft;intervals) are sawed as soon as porrlble with only
minor ravelling alloued;~runaining joints are sawed between 2448
hours.
Reinforced dowelled pavement is not sawed on skew. All other; are at
2/12.
Required but type not specified.
Any grade of steel conforming ASlU A615 ts permitted.
(Concrete to Concrete) Lou modulus silicone (cold) is preferred.
(Concrete to Asphalt) Hot rubberized asphalt ASm D-3406 and ASTM D-3405.
Rubberized asphalt over filler and/or polychloroprent compression Seals.
Ei::;;w;;oxy (7 mil thickness) or plastic (25 ail thickness) ,coatingS am
]nitial &ng is 2 jnches for plain pavement rnd 1 3/B inches for plain
dowelled pavement.
Plain pavement initial saw depth is d/4. Plain Dowelled Initial SW depth
is d/3.
3.11.09