2010-08-10_REVISION - C1981008 ‎(7)‎

• Permit No: C1981008
• IBM Index Class Name: Revision
• Doc Date: 8/10/2010
• Doc Name: Response 4 Revised Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-8
• From: Western Fuels-Colorado
• To: DRMS
• Type & Sequence: PR6
• Media Type: D
• Archive: No

• Table 4.3. Effective roadbed soli resilient modulus values, M (pal), that may be used in
the design of flexible pavements for low - volume reads. Suggested values
depend on the U.S. climatic region and the relativequality of •.he roadbed soil.
0 the predicted future traffic, w (Section
21.2). for the period, .
(Z the lengths of the seasons (Section 2.3.1; or
criteria in Secd=4.1.1 may be used if better
information is not available),
(3) seasonal resilient moduli of the roadbed soil
(St-.; lion 23.1 or general criteria in Seaton
4. 1.1 may be used if better information is not
available),
(4) elastic modulus. E (psi), of asgregate base
layer. (Section 2.3.3).
t.) elastic rr:odu.us.
E.. 4- Si). of a;� ee3te
subbase layer tSection 2. 3.3).
10 &sign serviccabilily lass. APSI (Suction
(T) allowable rutting. RD (inches). in surface
layer (Section 3-3.2). and
bl 'd 4M 'ON
Stepl; Selec tfourImisofnggrcpW base
thiclmaa,
D which should bound the probable solution. For
this, four separate tables, identical to Table 4A. should
be prepamd. Enter each of the four trial basethickness,
D in the upper left-hand corner of each of the four
tables (D� _ $ inches is used in the example).
Step 2: Enter the design seMccability loss asa'cA as
the nllowable rutting in the appropriate boxes of each
of the four tables.
Step 3: Eater the appropriate seasonal rallient
(z :antic) rtod ui i of the roadbed M ) and the aSgre gate
base material. E (psi), in Colunas 2 and 3. resree-
tivcl of Table 4.4. The bas. modulus values may be
praportios :l to the resilient r,.o.tu :us of :`:: reac;;.i
soil dune a given. scas.m. A com tar ic
t %ae of 3v.0J3
ps :'.%- s usi!.i in t I M, d a & :i j : ^. ho v-e:.li1[S a V n
of th.- ado :rLa :c baic material %•i :. -a c-1 %r tcd is :oa n
coui%a:cnt the &ricss of subbase matt.-al t Muc il"M
provide some sh :eld:gainsttheetst',rorimc: al rrotf :urr
effects).
'5ut 'Uoivei ossw scan, ujatsau
_WJ11:1 onn7
REVISED JULY 2006 Attachment 2.05.3(3) -8 -12
Relative Quality of Roadbed Soil
U.S.
Ct;tzsti0
Region very Poor
Poor
• . •� '
Pair 'Good Vvy Good
I 2.800
3.700
5.000 ' Moo 9.800
d WW '
3.400
A.500 8.500 7.
NI 2,700
3.000
4.000 4.400 6.700
IV 3.200
4.100
6.600 7, 11,700 .
V 3.100
3.700
r 100 6.000 8,200
Vl 2.800
4.100
4.500 rs,700 '
.s a , � ;y , •.lS +tCettld�C3pi9 Zr i•Sl
" ;._ .: r - •... , •. ,;..
Cee~°sma : .*oduwA ofthz� bed soll. dr:rioped
:o:
i$) a cgtzelcss, :.;iacha).raf
:Tenable p:.:�eai dtti��nottlducr ba ttst~i
� lieu of
'. (�%a�1• � : :i • • '. '. .
'•
procec� d�€T.DCd burn.
• :...:. ,,
• . . • ... . • t;Sr� .
''These derma.. na4airemeats ar= .: ca*acz:ra
%ita the computational cha+'t in Table 4.4 -rind the.
The pd ary design rogt%ir==xs for agate-
design aosacgraphs for ---'ni =bully (F ' as-
surfac:d sold: (17) include:
rattioS (Figure 4.3). An e_cample of the appliCadon of +
certain steps of this prooad= is presented in Table
'4.5
0 the predicted future traffic, w (Section
21.2). for the period, .
(Z the lengths of the seasons (Section 2.3.1; or
criteria in Secd=4.1.1 may be used if better
information is not available),
(3) seasonal resilient moduli of the roadbed soil
(St-.; lion 23.1 or general criteria in Seaton
4. 1.1 may be used if better information is not
available),
(4) elastic modulus. E (psi), of asgregate base
layer. (Section 2.3.3).
t.) elastic rr:odu.us.
E.. 4- Si). of a;� ee3te
subbase layer tSection 2. 3.3).
10 &sign serviccabilily lass. APSI (Suction
(T) allowable rutting. RD (inches). in surface
layer (Section 3-3.2). and
bl 'd 4M 'ON
Stepl; Selec tfourImisofnggrcpW base
thiclmaa,
D which should bound the probable solution. For
this, four separate tables, identical to Table 4A. should
be prepamd. Enter each of the four trial basethickness,
D in the upper left-hand corner of each of the four
tables (D� _ $ inches is used in the example).
Step 2: Enter the design seMccability loss asa'cA as
the nllowable rutting in the appropriate boxes of each
of the four tables.
Step 3: Eater the appropriate seasonal rallient
(z :antic) rtod ui i of the roadbed M ) and the aSgre gate
base material. E (psi), in Colunas 2 and 3. resree-
tivcl of Table 4.4. The bas. modulus values may be
praportios :l to the resilient r,.o.tu :us of :`:: reac;;.i
soil dune a given. scas.m. A com tar ic
t %ae of 3v.0J3
ps :'.%- s usi!.i in t I M, d a & :i j : ^. ho v-e:.li1[S a V n
of th.- ado :rLa :c baic material %•i :. -a c-1 %r tcd is :oa n
coui%a:cnt the &ricss of subbase matt.-al t Muc il"M
provide some sh :eld:gainsttheetst',rorimc: al rrotf :urr
effects).
'5ut 'Uoivei ossw scan, ujatsau
_WJ11:1 onn7
REVISED JULY 2006 Attachment 2.05.3(3) -8 -12