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of ituminous Mixtures

Using

T11is smndard has >?en op pro v~d /or y agencies o rhe Depunmenr o D c k n . ~ .Comirlr

hr

BoD

In

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FIG. 1 Compactlon Mold

InchPound

MIS.

Meth Equi

in. lents.

mn

0.005 0.11

132 0.8

a 1.6

'/S 3.2

S 4.8

l r 6.4

9 32 7.1

Va 9.5

0.496 12.6

0.499 12.67

12.7

9/76 14.3

W 15.9

.

Owcmv

0 m - 0

COiLLR LM LU5C RLTL

.m UIIUR.m

Table

of

Equivalentsfor Figa 1 and 3

la Imh-Powid Melrk Equ ~ a Inch-PowKI Lhlfs. MelriC Equivalents. Ind-Pwnd Wts. Mevic E*

Unils. in. lents. mm m. mm in.

' 6

17.5

2 58.7 4 104.8

V6

19.0 2 63.5

4

'a 22.2 23/4 69.8

4

< S 23.8 ZB 73.0

4th 114.3

1

25.4

3 762 4Ys 117.5

1S

28.6 3

82.6 4 120.6

1 31.8 3'/ ~ 87.3 5 ~ 128.6

1 34.9 3 98.4 5

1 /n 38.1 3 101.2

5

1

41.3

3.990 101.35 6 152.4

1

V4

44.4 3.995 101.47 6 158.8

4 101.6 193.7

50.8 7

2 57.2 4.005 101.73 27 685.8

F I W E R GUIR

I

- -

L

FIG 2

Compaction Hamrner

.

i

resistance. The guide sleeve shall slide freely over thegi

rod of the breaking head. Tlie flowmeter gage shaU

adjusted to zero when placed in position on the brea

134

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TEST HEAO

UPP R

@

k

I

--Reme

CO? *,$ &

GUIDE POST

@

-m

.oso0

pmm

Slsdinp

F S I

e No 5

S LEEVE 6

ADAPTER @

.-a-.-

,... .

. Flof

Heod

Mmhnc

scioi 1420 TP, - 1 ~ ~

ASSEMBLY

, ,

BASE

VaMe o EquivaienissamB as

or

Fig. 1

F1G.

BreakimgHead

when each individ ua test specimen is inseried between

breaking head segme s. Gr ad uat ion s of the flowmeter

O

5-mm) divisions.

1.8'F (37.8

1C). T he 'tank shall have a perforated false

bottom or be equippe d with a shelf for supp orting specimens

2

jn. (50.8 m m) a bove the bottom of the bath.

3.13 Air Bath-The air bath for asphalt cut-back mixtiires

shall be thermostatically controlled and shall maintain the

air temperature at 77F I 1.8 F (25 -c .O C).

3.14 Miscellaneozis Equipment:

3.14.1 Conlainers for heating aggregates, lat-bottom

metal p an s- sr other suitable containers.

3.14.2 Con lainers for heating bitum inous m aterial, either

gill-type tins, beakers, pouring pots, or saucepans may be

used.

.

3.14.3 Mixing Tool, either a steel trowel (garden type) or

spatula, for spading and hand mixing.

3.14.4 Thermomefers for determining temperatures of

aggregates, bitumen, and bituminous mixtures. Armored-

glass or dial-type thermometers with metal stems are recom-

mended.

A

range from

5

to 40VF (9.9 to,2D4 C), with

sensitivity of 5F (2.8 C) is required.

3.14.5 Thermom efers for water and air bath i with a range

from 68 to 158'F (20 to 70'C) sensitive to 0.4 F (0.2-C).

3.14.6 Balance, 2-kg capacity, sensitive to 0.1

g,

for

weighing moldcd specimens.

3.14.7 Balance, 5-kg capacity, sensitive to 1.0 g, for

batching mixturcs.

3.14.8 G/oves for hand ling hot equipm ent.

m 4-lnstead

of

the flow meter, a micrometer di i or stress-strain

graduated in

0.001

in

0.025

mm) may be,used to measure

Ovens or

or

Plaf ?S-Ovens o r ho t plates shall be

vided for hea ting aggre ;ates, bitum ino us materia l, spec-

n molds, com pactio n ham me rs, an d o the r equipme nt to

molding tem peratures. It is recom-

its

be

thermostatically controlled

rcquired temperature within 5'F

me plates o r sand baths shall

be

hot plates to m inimize localized

Apparafus--Mechanical mixing is recom-

rrechanical mixer may be used

mairtained at the required mixing

de a well-coated, homogeneous

ount in the allowable time, and

esseitially al1

of the batch can be

bowl of suficient capacity and

u;ed.

igater bath .shall be at least 6 in.

,e thermostatically controlled so

1,,0I 1.8 F (60 I.O'C) o r 100

required mixing and

as to maintain the

Suitable shields, b:

on the surfaces of the

.1 Mixing

vided it ca n be

ixture of the required a n

A metal pan or

mixing mayohlso be

.12 Water Bath-T he

mm

eep and shall

ntain the bath at

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3.14.9

Rirhher Gloves

f r removing sp ecim ens from water

bath.

3.14.10

Murking Cruy

s

for identifying specimens.

3.14.1

Scoop

flat bott m, for batching aggregates.

3.14.12 Spoon large, or placing the mixture in the

specimen molds.

i

.

Test Specimens

content.

to m 25.0 lo 19.0 mm)

314 lo 1s

in.

19.010 9.5 nim)

J/8

in .

lo No. 9.5 rnm lo

4 7

N o . 4 lo No. 8 4.75 mrn io 2

P d s i n g

N o . 8 2.36 m m )

Vol 14.02.

IM

- W - T Z . > R R I

ELECT

MOTOR

t

t

i

c

SEC IION

.A.A.

o

h

.sien

Testing

Machine a

r

after it has lost 50 of its solvent. T he tem per aro

determined from the viscosity temperature chart to w hr

the asphalt cut-back must be heated to produce a viscosi~

280 30 cSt after a loss of 50 of the original solaw

conte nt shall be the com pacting temperature. pr

4.3.4 T he tem perature to which, tar must be heated

fo

prod uce Eiigler specific viscosities of 25 ir 3 and 40 5 shfro

be respectively the mixing and compacting temperature. S

4.4 Preparation

of

Mixfures

te

4.4.1 Weigh into separate pa ns for each test specimeni

am ou nt of each size fraction required to prod uce a batch For

will result in a com pacted specimen 2.5 0.05 in.

(63.1:

1.27 mm ) in height (about 1200 g). Place the pans on the&

plate or in the oven and heai to a tempe rature not exce&esi

the mixing te mp eratu re established in 4.3 by m ore tthig

approximately 50F (28C) for aspha lt cemen t an d tar mide

and 25'F (14'C) for cut-back asphalt mixes. Charge f n

mixing bowl with the heated aggregate an d dry mix

i

oughly. Form a crate r in the dry blended aggregate and W~h

the preheated pq p ir ed am oun t o f bituminous m aterial rre

the mixture. For mixes prepared with cutback as@e

introduce the mixing blade in the mixing bowl and

dt? pe'

mi ne the total weight of the rnix com pone nts plus bowl5.

blade before proceeding with mixing. &re mu st be exem

to prevent l o s of the mix diiring mixing and subseqx

5

handling. At this p oint, the temp erature of th e aggregaterar

bitum inous material shall be within th e lirnits of the mifat

temperature established in 4.3. Mix the aggregate he

bituminous material rapidly until thoroughly coated.

,he

4.4.2 Following mixing, cure asphalt cutback m i x t u d .

a ventilated oven maintained at appyoximately 20.F (1 l .

above the compaction temperature. Curing is to be [)at

tinued in

the

mixing bowl until the precalculated weighlea

50 solvent loss or more has been obtained. The rnix

t .

m o

be stirred in a mixing bowl dunng curing to acceleralehe

solvent loss. However, care should be exercised to pm

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mix d un ng cun ng in successive

and less than 10 min intervals as

o size in the bottom of the mold

temperature shall

be

maintained between 70 to IOWF (2

1

to 37.8 C) using a water bath when required. Remove the

specimen from the water bath, oven, o r air bath, and place in

the lower segment of the breaking head. Place the upper

segment of the breaking head on the specimen, and place the

complete assembly in position on the testing machine. Place

the flowmeter, where used, in position over one of the guide

rods and adjust the flowmeter to zero while holding the

sleeve firmly against the u pper segment of the breaking head.

Hold the flowmeter sleeve firmly against the upper segment

of the breaking head while the test load is being applied.

5.2

Apply the load to the specimen by means of the

constant rate of m ovement of the load jack o r testing-

machine head of 2 in. (50.8 mm)/min until the maximum

load is reached and the load decreases as indicated by the

dial. Record the maximum load noted on the testing

machine o r converted from t he maxim um micrometer dial

reading. Releaie tbe flowmeter sleeve or note the micrometer

dial reading, where used, the instant the maximum load

begins to decrease. Note and record the indicated flow value

or equivalent units jn hundredths of an inch (twenty-five

hundredths of a millimetre) if a micrometer dial is used to

measure the flow. The elapsed tim e for the test from removal

of the test specimen from the water bath to the maximum

load determination shall not exceed 30 s.

TABLE Stability Correlation Ratios A

Vol-

of

Spedmen. ;Eg d

cm3

mm Conelatim Ratio

Soecimen.

rocedure

457 10470 2 57.2 1.19

471 lo

4 8 2 25/18

58.7 1.14

5 1 Bring the specimens prepared with asphalt cement or

483 10 495 2% 60.3

l W

r to (he specified tempe tur e by im mer sing in th e water

496 to 508

2 % ~ 61.9 1

M

509 lo 522

2% 63.5 1M

3 to 40 min or plac

g

in

the oven

for

2

h. Maintain 523 to 535

2%

65.1 0.96

bath or oven tem pe ra t e a t 140

f 1.8 F

60

f

.O C)for

538 t0 546 25 ~ 66.7 0.93

asphalt cement specir ens and 100

f

1.8 F (37.8

547 lo 559

2' s

M1.3 0.89

560 to 573

m

69.8 . 0.86

.(PC) for tar specimens. 'ng th e spe cim ens prepare d w ith

574

10 5.95 2 ~ ~ 8 71.4 0.83

sphalt cut-back to the ecif ied tem pera ture by plac ing 586 to 598

2vs

73.0 0.81

i n the air bath for a inim um of h. Maintain the air 699 to 610

2*s/,.

74.6 0.78

61

1 lo

625

temperature

?t

77 f 1.8 F (25 1.O'C). Thoroughly

3 76.2 0.76

lhe guide rods an d t inside su- of th e test heads staHnvf

a

mdliWed

lh

at(ofw hethickness

maki,ng

the

test, a lubncate

the

guide

iads

so

that

0

specimen eguals m m t e d

stamty

for

a

P'h-in.

(63.5-mm) SPectmen.

BVolume-thickness rslationship is based on a spedmen diameter of 4 in.

test head slides f eely over them. The testing-head

(ro1.6 mm).

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OT -For core specimen s, c rrect the load when thickneu is

NOT

-For W specimcns, t he height of each test specirnen a

other than

2 /2

in. (63.5 rnm) by u tng the proper multiplying factor

inches (or millimetres) shall be reported.

from Table l

6.1.2 Average maximum load in pounds-force

a

newtons) of at least three specimens, corrected when

r

quired.

'

*

6

cpori

6.1.3 Average flow value, in hundredths of an inch

6.1 T h e r e ~ o r t hall includ e the following inform ation: twentv-five hund redths of a millimetre, of three specimem

I

.1.1

T ~ G

f sample tested (laboratory k m p l e or pave-

and

me nt c ore specimen).

6.1.4

Test temperature.

for Tesrlng and Maferials rakes no position respecfing rhe velidlly olany paren Nghts assefi ad ni connection

Ni lhis slandard . Usen o1 lhis standard ate expressly ad vissd lhaf delerminatlon o1 rhe vaiidlty o1 any such

k o1 inlringement o1 suc h righls, are enlirely lhe ir own responsibillly.

b

p

s

t

s

p

s

e

a

M

p

av

Bl

re

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