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Home My WebLink AboutCT 74-21; CARLSBAD OAKS BUSINESS PARK; R-VALUE AND PAVEMENT SECTIONS; 1987-11-110 1---lLE7-74 -Zf . fLT SAN DIEGO GEOTECHNICAL CONSULTANTS, INC. SOIL ENGINEERING & ENGINEERING GEOLOGY T & G Investments 3575 Kenyon Street San Diego, California 92110 Attention: Mr. Ted Tchang Job No. 05-7176-001-00-30 Log No. 7-2502 NOV JG/j) SUBJECT: RESPONSE TO REVIEW R-Values & Pavement Sections - CT 14-21 , Phase 2 Laker Avenue East, Sea Otter Road and Sea Lion Roád Carlsbad Oaks Business Center East Carlsbad, California Gentlemen: This letter is in response to the review of our R-value and pavement section letter by Dan Clark of the City of Carlsbad. As requested we are providing the R-value test reports. The R-value tests were performed according to CALTRANS Test Method 301. We are also enclosing a copy of our structural section calculations. In the past, the City of Carlsbad has not required that the calculations be submitted. Concern was expressed regarding our use of an R-value of 10 rather than the minimum reported value of 6. In our opinion, an average R-value of 10 will be adequate in this case. The reported values of 6 and 8 most likely represent isolated areas. Also, the R-value test becomes inaccurate at values below 10. The City of Carlsbad Supplemental Standard Drawing number GS-17 lists a minimum design R-value of 8. Using an 8 rather than a 10 would result in a insignificant increase in base thickness. It was noted that the City of Carlsbad Supplemental Standard Drawing number GS-17 specifies the top 12 inches of sub-grade be compacted to 95 percent. The drawing does not indicate whether 6455 NANCY RIDGE DRIVE • SUITE 200 • SAN DIEGO, CALIFORNIA 92121 • (619) 587-0250 0 T & G Investments Job No. 05-7176-001-00-30 November 11 , 1987 Log No. 7-2502 Page 2 the compaction should he to 95 percent of standard proctor (ASTM D 698) or modified proctor (ASTM D 1557). Compaction to 90 percent of ASTM D 1557 is approximately equivalent to 95 percent of ASTM D 698. In our opinion, compaction to 90 percent of ASTM D 1557 is adequate. In some cases, especially with clayey sub- grade, compaction to 95 percent of ASTM D 1557 is not possible. The City of Carlsbad Supplemental Standard Drawing number GS-17 is confusing with respect to the specification of aggregate base. Item 2 on the drawing appears to be a specification for aggregate base but it refers to the CALTRANS specification for aggregate sub-base. GS-17 does not include structural sections with sub-base, therefore, one would not expect specifications for sub-base to be presented on the drawing. The usual specification for aggregate base is CALTRANS 26-1.02B. In our opinion, the specification for minimum R-value of 40 is sufficient for subbase material. In our opinion the request for sand equivalent (SE) tests on the subgrade material is not warranted. An SE is not useful for determining subgrade quality. The CALTRANS pavement design method does not incorporate the SE. If you have any questions, please feel free to contact the undersigned. Very truly yours, SAN DIEGO GEOTECHNICAL CONSULTANTS, INC. f?a47I ?Robert M. Pintner A~nt ony F.,ielfast,P.E. C 40333 Staff Engineer Expiration Date: Chief Engineer RMP/AFB/mp ((c! Distribution: (1) Addressee (1) City of Carlsbad 0 040335 IRVINE - CONSULTING GROUP, INC. NC _____ __________ JOB NO.: DATE: BY: IRVINE SOILS ENGINEERING. INC. 0 HIGHLAND TESTING LABORATORY, INC. 0 IRVINE TESTING LABORATORY, INC. O CONSTRUCTION TECHNOLOGY CONSULTANTS, INC. 0 HIGHLAND SOILS ENGINEERING, INC. 0 IRVINE LEASING GROUP CLIENT: O SAN DIEGO SOILS ENGINEERING. INC. 0 GEOTECHNICAL INSTRUMENTATION SERVICES SUBJECT., O AMERICAN INDEPENDEDNT LABORATORIES, INC. 0 COASTAL VALLEY SOILS ENGINEERING. INC. ciba CONSTRUCTION LABORATORIES 0 COASTAL VALLEY CONSTRUCTION LABORATORIES. INC. PAGE 0 HIGHLAND GEOTECHNICAL CONSULTANTS, INC. 0 COASTAL VALLEY GEOTECHNICAL CONSULTANTS, INC. ________________ OF: _- -- 41 ?VINE CONSULTING GROUP, INC. .- 00? -ocj'3() JOB NO.: - DATE: BY: O IRVINE SOILS ENGINEERING, INC. O IRVINE TESTING LABORATORY, INC. O CONSTRUCTION TECHNOLOGY CONSULTANTS, INC. O SAN DIEGO SOILS ENGINEERING, INC. O AMERICAN INDEPENDEONT LABORATORIES, INC. dba CONSTRUCTION LABORATORIES O HIGHLAND GEOTECHNICAL CONSULTANTS, INC. O HIGHLAND TESTING LABORATORY, INC. O HIGHLAND SOILS ENGINEERING. INC. O IRVINE LEASING GROUP O GEOTECHNICAL INSTRUMENTATION SERVICES O COASTAL VALLEY SOILS ENGINEERING, INC. Cl COASTAL VALLEY CONSTRUCTION LABORATORIES, INC. O COASTAL VALLEY GEOTECHNICAL CONSULTANTS, INC. CLIENT: SUBJECT: PAGE: 2- OF: — — — — — — — — - --------- - - - - - - - - - too I I I 1 ie LLLLL±LL IT IlIL I IILL IE1IL I 1 1 II I - ----- -------------- I I I I I I I_I IIi i I I 1 1 II III I_I_I_ JOB //4 T6 ' - TEST 14fT/icD___________ oa No. _Oç -o -O TESTED y_ '-31?. DATE'7/1 2 SAM P1E NO. I L N. iDt- CJ/ECA'ED EY DATE____ SAI4 ALE SAMPL.ED SY DATS S AMPLE bEstR1PrJoivTh t PR7CT MNG,E1 ________ SPECIMEN __________ ITEM b _________ c ( d MOLD NUMBER 6 WATER ADDED, GRAMS 65 COMPACTOR GAGE PRESSURE, POUNDS GROSS WEIGHT MOLD, GRAMS TARE WEIGHT MOLD, GRAMS ;.7 012 iO1 p SAMPLE WET WEIGHT, GRAMS / •j g , I I c 2.- j 131 EXUDATION PRESSURE, LOAD ) cj p 0 9. EXUDATION PRESSURE; PSI 3/ 3 f HEIGHT SAMPLE, INCHES EXPANSION, INCHES X 104 STABILITY 2,000 (I6OPSI TURNS DISPLACEMENT R—VALUE UNCORRECTED ..- .- R—VALUE CORRECTED ACTUAL TEST, WATER, % I S I , DRY DENSITY, PCF 112.,7 . I .i. 3 TRAFFIC INDEX v-c/.o G.E. BY STABILITY •I//fj /i.-s ,?/i,tLt _______I________ G.E. BY EXPANSION . 07 ,1`3 c6.5 EXAMINED AND CHECKED BY: ECUL1R1UM R — VALUE The eato above is based joan processing end testing somOtes as received from the field. Test procedures in accordanct with latest revisions to Ceoortment of Tror t a t i ø n , S t a t e o f California, Materials 8 Research Test Method No 301. JOB 1/4 flE J ( ITJ TS T flE T/JD__________ JOR No. c<- 7J cc) i-oo3c - TESTED BY ____0-4 SAMPLE Vo. LA B No. - CHECflD BY- -SAMPLE USE 21- Si MPLED BY A/4PLf DECR/PT/6'NTc SCiv/)/ PRO7EC.T MNRL ITEM I SPECIMEN b $ C d fa MOLD NUMBER WATER ADDED, GRAMS COMPACTOR GAGE PRESSURE, POUNDS 36 0 GROSS WEIGHT MOLD, GRAMS TARE WEIGHT MOLD, GRAMS /. DL SAMPLE WET WEIGHT, GRAMS 1/2 7.4 , / / DL71 •i _________I ________ EXUDATION PRESSURE, LOAD EXUDATION PRESSURE, PSI -. HEIGHT SAMPLE, INCHES EXPANSION, INCHES X IO STABILITY 2,000 (I6OPSI) TURNS DISPLACEMENT ... '7' ) C' 5.. •fl) 4' 27 R-VALUE UNCORRECTED R -VALUE CORRECTED ACTUAL -MST, WATER,% DRY DENSITY, PCF II3' /O'f.7 1 17 ,Lf TRAFFIC INDEX ,,a J/Q G.E. BY STABILITY . )0 •9o/J.c .7gh zb I G.E. BY EXPANSION EXAMINED AND CHECKED BY: ECLflL!R!UM R - VALUE = - The Cola above is based uoon roces.iIng and testing samotes as received frc.Yn the field. T e s t procedures in ocCOtCOflCe with Io?eit revisions to 0eoor?ment of Transp o r t a t i o n , S t a t e o f California, Materials & Research Test Method No 301. e JOB NA - TESTETIICD I JOa No. _T-- TiS TED Y_ DAI~ SAM PLE NO. 3 LA N. CYECflD. SY____ SAMPLE USE C i - SIMPLW BY S AMPLE DESCRIPTION — )r/ pgEcr tuL 1 ITEM ________ 0 SPECIMEN b C d MOLD NUMBER WATER ADDED, GRAMS COMPACTOR GAGE PRESSURE, POUNDS CROSS WEIGHT MOLD, GRAMS TARE WEIGHT MOLD, GRAMS 24).3Cj,j I ________ SAMPLE WET WEIGHT, GRAMS IOClO(o EXUDATION PRESSURE, LOAD 3 0 52.. 0 - EXUDATION PRESSURE, PSI 2-60 1 HEIGHT SAMPLE, INCHES EXPANSION, INCHES X to STABILITY 2,000 (160 PSI) TURNS DISPLACEMENT 3 79 ,____ __________ R-VALUE UNCORRECTED ..— .. R-VALUE CORRECTED -- ACTUA..'MST, WATER,°!Q DRY DENSITY, PCF i07./. TRAFFIC INDEX G.E. BY STABILITY G.E. BY EXPANSION 50 /,0 3 EXAMINED AND CHECKED BY: EQUURIuM R — VALUE = The data above is based uoan x'ocetsinq and testing somotes as received from the field. Test prccedures in accOrdOnCe with latest revisions to (Department of Transportation, State of California, Materials a Resaarcii Test Method No 302. JOB NAME 6-J -fr- TEST ,ET/JOD___________ J02 N0. — i —/- O TESTEDY _ DAT/J SA MPLE LAB CRECA'D.EY SAMPLE USE 3T7_-)-co •i(cv_f SAMPLED BY. SA/4PL.E DEECR/PT/'N'_)_ PeEC.TMNG.R, [_ - ITEM SPECIMEN b ( c d MOLD NUMBER WATER ADDED, GRAMS . 73 COMPACTOR GAGE PRESSURE, POUNDS GROSS WEIGHT MOLD, GRAMS TARE WEIGHT MOLD, GRAMS 7-' ° SAMPLE WET WEIGHT, GRAMS 11 I 0 Io8?,f /Z) 79 EXUDATION PRESSURE, LOAD EXUDATION PRESSURE, PSI HEIGHT SAMPLE, INCHES EXPANSION, INCHES X IO STABILITY 2,000 (I6OPSI) OX to 1 b,'17 ç.4' ,/' . TURNS DISPLACEMENT ,.• L/ ) ,, /9,7q • R—VALUE UNCORRECTED ,_-• - R—VALUE CORRECTED -- ACTUAL TEST, WATER,% S 2..0.0 DRYDENSITY,PCF /0.L(. II2.,0 TRAFFIC INDEX -/o G.E. BY STABILITY .B2//,/,/I L/6 I ,-% 37 $ G.E. BY EXPANSION ,60 }_I_________ 8JTT3 EXAMINED AND CHECXCD BY: ECUL!BRIUM R - VALUE = The cola above is based uoan Processing and testing samotes as received from the field. Test procedures in oC C O t O f l C e with latest revisions to Deoartrnent of Transportation, State of Cliforn I o , M a t e r i a l s a Research Tail Method No 301. J08 IMME 1-T TESrnETHOI_________ JOa No. :,)/--o T5TEDaYJ311 DA72? SAMPLE 4/0. L,& a N. CYEC.rED BY SAMPLE USE .. MPLED 13? SAMPLE ECR/PT/ONQ-- SPECIM EN Id ITEM MOLD NUMBER WATER ADDED, GRAMS COMPACTOR GAGE PRESSURE, POUNDS GROSS WEIGHT MOLD, GRAMS TARE WEIGHT MOLD, GRAMS SAMPLE WET WEIGHT, GRAMS EXUDATION PRESSURE, LOAD EXUDATION PRESSURE, PSI HEIGHT SAMPLE, INCHES EXPANSION, INCHES X IO STABILITY 2,000 (160 PSI) TURNS DISPLACEMENT R — VALUE UNCORRECTED R—VALUE CORRECTED ACTUAL TEST, WATER,% DRY DENSITY, PCF TRAFFIC INDEX G.E. BY STABILITY G.E. BY EXPANSION 3 352 )/1T1>n9 911 'f2o I310 2) • ___ L3' 5'7i -- )7I0 157. g mr- /6,c k174-1) 1 .07 I .ço I CX'MINED AND CHECKED BY: EQU1L1R1UM R — VALUE = 1/ The cola above is based uoon processtni and testing so m o t e t a s r e c e i v e d from the field. Test prcedurt in accOrdOnCe with toteif revisions to 0eoartment of T r a n s p o r t a t i o n , S t a t e o f California, Materials a Resacrori Tast Method NO 301. S JOB IMME] In.±-k - TESTETNCD__________ J02 No. _ -7176 -)Q1-c--7 —30 TESTED 3 Y_1\ DAT(74/ SAMPLE NO. LA a N. CEECk'ED BK DATE____ SA/1PLE USE Ji 2' 4 2 SAMPLED BY SAMPLE CEScR/FT/CIV 1 ievx2 PRe,7ECI MNG.R LII ITEM ________ SPECIMEN b C d MOLD NUMBER WATER ADDED, GRAMS COMPACTOR CAGE PRESSURE, POUNDS GROSS WEIGHT MOLD, GRAMS )2/ TARE WEIGHT MOLD, GRAMS / .'?D SAMPLE WET WEIGHT, GRAMS /07,9,41 ,, tL EXUDATION PRESSURE, LOAD 00 . EXUDATION PRESSURE, PSI HEIGHT SAMPLE, INCHES 5 7 - (/9 EXPANSION, INCHES X 10 4 /0 1._7/ - o STABILITY 2,000 (160 PSI) /'LI. -i TURNS DISPLACEMENT .. I -'- " R—VALUE UNCORRECTED _.- R—VALLJE CORRECTED 7,/ i_ 1/, 27 ACTUAL TEST, WATER,°!0 ( 3 7- DRY DENSITY, PCF /o( ç /02.0 I D9,8 TRAFFIC INDEX -r/ G.E. BY STABILITY G.E. BY EXPANSION fl J / 3 1 '' J_I 3.S EXAMINED AND CHECKED BY: ECUL11UM R - VALUE The data above is based uoan processing and testing samples as rec e i v e d from the field. Test procedures ,n occardailce with totest fe'VSi0flS to OôOorllTien? of Transportation, Stole of Califo r n i a , M a t e r i a l s i R e s e a r c h T a i l M e t h o d . ' I O 3 0 1 . JOB 114METh.& Th TEST TROD__________ JOa No -,7 b TES7fDY_ DAT': SAMPLE iVo. LA N._I3 CREC'ED BY. DATf____ SAMPLE usg jcMSfMPLE BY DATE____ SAMPLE DESCR/PT/CN 51 PCr MNCE 1 ITEM MOLD NUMBER WATER ADDED, GRAMS COMPACTOR GAGE PRESSURE, POUNDS CROSS WEIGHT MOLD, GRAMS TARE WEIGHT MOLD, GRAMS SAMPLE WET WEIGHT, GRAMS EXUDATION PRESSURE, LOAD ]EXUDATION PRESSURE; PSI HEIGHT SAMPLE, INCHES SPECIMEN ol b a 3c' ?Z -,21 lI7 D7 9 ,06 10f -367,I d I EXPANSION, INCHES X IO 4 29 - STABILITY 2,000 (I60PSI) ____t_4/O/,, TURNS DISPLACEMENT 4ev R—VALUE UNCORRECTED .— R—VALUE CORRECTED 7, 3 ,Q - ACTUAL TEST, WATER,°!0 / ~- 7 /2 . /(),0 - DRY DENSITY, PCF /13.0. /18.& /2.5i0 TRAFFIC INDEX S G.E.BY STABILITY . , /,• j ,7 4,_ I________ ________ G.E. BY EXPANSION o7 J_L/7 /'30 5' 2LZ'1 EXAMINED AND CHEC}CD BY: ECUL!RIUM R — VALUE = The cto above is based uoon woces.sing and testing samples as received from the field. Test procedures in accordance with latest revisions to Ceoartment of Transportatio n , S t o l e o f C a l i f o r n i a , M a t e r i a l s a Research Test Method No 301. 1L J02 NAME t Aet,,4 - TEST ,1E TROD___________ L/02 No. 0 ç-7' 76 / -- - TESTED B Y_ 01/ SAMPLE NO. '7 LA a No. CHEC.KED, BY. DATh' ____ SAMPLE us 2+ 5cfn o SMPLE BYLATE SA/4PLf DESCR/P77N per MuRt_ SPECIMEN a b C joe / ,q Ii i 1q /O7 .1 7I -- I• /.7 /07,0. - 8/LL4 I.A 32- /1,77 EXAMINED AND CHECKED BY: ITEM MOLD NUMBER WATER ADDED, GRAMS COMPACTOR GAGE PRESSURE, POUNDS GROSS WEIGHT MOLD, GRAMS TARE WEIGHT MOLD, GRAMS SAMPLE WET WEIGHT, GRAMS EXUDATION PRESSURE, LOAD EXUDATION PRESSURE, PSI HEIGHT SAMPLE, INCHES EXPANSION, INCHES X IO STABILITY 2,000 (160 PSI) TURNS DISPLACEMENT R - VALUE UNCORRECTED R—VALUE CORRECTED ACTUAL TEST, WATCR,% DRY DENSITY, PCF TRAFFIC INDEX G.E. BY STABILITY G.E. BY EXPANSION d e EQUtL1BRUM R - VALUE = /0 The data above is based upon processing and testing samotes as received from the field. Test procedures in occardonce with tote,t revisions to Deoartment of Trans p o r t a t i o n , S l a t e o f C a l i f o r n i a , M a l e r t l s a Res.arcri Test Method No 301. JOB //AME 7-3''Je%r TEST ,1ET/J7D_________ Joallo. _ TESTEDY_InDA7Et//7 SAI1PLE 4/0. LA a N._ - CHECkED BY. - DATE____ SAPLE USE 3 .SAMPLED BY_ SA/4PLE DEStP/PT/CN o / I PRC.T MNak 1 ITEM _______ _________ a SPECIMEN _________________ _ _ _ b c d MOLD NUMBER WATER ADDED, GRAMS COMPACTOR GAGE PRESSURE, POUNDS 30o 00 GROSS WEIGHT MOLD, GRAMS 2 ) 3 TARE WEIGHT MOLD, GRAMS /./ 4'.! 2 09 SAMPLE WET WEIGHT, GRAMS / /7L1 10-7 7 1,05, EXUDATION PRESSURE, LOAD '3 0 03.) EXUDATION PRESSURE; PSI 65 a L/ / 1. 3 HEIGHT SAMPLE, INCHES EXPANSION, INCHES X IO 4 T 7 STABILITY 2,000 (160 PSI) TURNS DISPLACEMENT R—VALUE UNCORRECTED 1 1 R—VALUE CORRECTED i2.c'8,0. ACTUAL TEST, WATER, % 17_0 /,'- /. DRY DENSITY, PCF 0 3,o. tL 1 ô.- TRAFFIC INDEX Iir/.o G.E. BY STABILITY G.E. BY EXPANSION - EXAMINED AND CHECKED BY: ECUL!RIUM R - VALUE = 1 1 The Coto above is based uoon PrOCeulnq arid testing somotes as received from t h e f i e l d . T e s t p r c c e d u res in accordance with latest revisions to Daoor?rnent of Transportation, Stole of Clifomio, Materials a Resaorch Test Method No 301.