Transcript
Page 1: Model Specification for Pavement Layers made 8. … Specification for Pavement Layers made ... furnace slag,pulverised fuel ash,cement and hydraulic road binder. ... fresh wet density

Mod

el

Spec

ific

atio

n fo

r Pa

vem

ent

Laye

rs

mad

efr

om S

oil

Stab

ilise

d by

Lim

e an

d H

ydra

ulic

Bin

ders

BR

ITIS

H L

IME

AS

SO

CIA

TIO

N

1.G

ener

al

This

m

ode

l sp

ecif

icat

ion

de

scri

bes

the

req

uir

emen

ts

for

the

con

stit

uen

ts,

com

posi

tion

an

d pe

rfor

man

ce

of

sub-

base

and

base

laye

rs m

ade

from

soi

l sta

bilis

ed w

ith

com

bina

tion

s of

lim

e,gr

ound

gra

nula

ted

blas

tfu

rnac

e sl

ag,p

ulve

rise

d fu

el a

sh,c

emen

t an

dhy

drau

lic

road

bi

nde

r.Th

e sp

ecif

icat

ion

rela

tes

prim

arily

to

mix

-in-

plac

e tr

eatm

ent

but

can

be a

dapt

ed f

or c

entr

al p

lant

mix

ing.

2.St

anda

rds

Lim

e -

BS E

N 4

59-1

:200

1C

emen

t -

BS12

G

roun

d gr

anul

ated

blas

t fu

rnac

e sl

ag -

BS

6699

:199

2.Fl

y as

h -

BS 3

892

part

1:E

N45

0H

ydra

ulic

roa

dbi

nder

s -

DD

EN

V 1

3282

:200

0 M

etho

ds o

f te

st f

orst

abili

sed

soils

-

BS19

24:1

990

3.D

efin

itio

ns,s

ymbo

ls a

nd a

bbre

viat

ions

PFA

-pu

lver

ised

fue

l ash

als

o kn

own

as

(coa

l) f

ly a

sh.

GG

BS -

grou

nd g

ranu

late

d bl

ast-

furn

ace

slag

.H

RB

-hy

drau

lic r

oad

bind

er (

a fa

ctor

y bl

ende

d hy

drau

lic b

inde

r sp

ecif

ical

lyfo

r ro

ads

and

pave

men

ts)

HB

-hy

drau

lic b

inde

r (a

mat

eria

l tha

t ha

rden

s bo

th u

nder

wat

er a

nd in

air

,w

hen

mix

ed w

ith

wat

er)

e.g.

cem

ent,

HR

B,an

d th

e lim

e/PF

A

or li

me/

GG

BS c

ombi

nati

on.

SHB

-so

il tr

eate

d or

sta

bilis

ed b

y an

hy

drau

lic b

inde

rO

MC

-op

tim

um m

oist

ure

cont

ent

MC

V -

moi

stur

e co

ndit

ion

valu

e

4.C

ons

titu

ents

4.1

Soil

Soil

for

SHB

sh

all

be

natu

rally

o

ccur

ring

mat

eria

l,ar

tifi

cial

mat

eria

l,re

cycl

ed m

ater

ial,

or a

com

bina

tion

of

thes

e.W

hen

wet

sie

ved,

not

less

tha

n 95

% o

f th

e so

il sh

all

pass

the

63m

m s

ieve

.O

rgan

ic m

atte

r,if

pre

sent

,sh

all

not

adve

rsel

y af

fect

the

per

form

ance

of

the

mix

ture

.If

th

is

exce

eds

2%

by

w

eigh

t,la

bora

tory

tes

ts s

hall

be c

arri

ed o

ut t

o co

nfir

mth

at t

he r

equi

red

stre

ngth

can

be

achi

eved

.

Soil,

part

icul

arly

tha

t co

ntai

ning

or

susp

ecte

dof

co

ntai

ning

su

lfat

es

or

othe

r po

tent

ially

disr

upti

ve m

ater

ial,

shal

l be

dee

med

sui

tabl

efo

r tr

eatm

ent

prov

ided

the

req

uire

men

ts o

fcl

ause

8.1

3 ar

e sa

tisf

ied

both

at

labo

rato

rym

ixtu

re d

esig

n st

age

and

duri

ng c

onst

ruct

ion.

4.2

Lim

e Li

me

shal

l be

quic

klim

e to

EN

459-

1:20

01 a

ndth

e fo

llow

ing

spec

ific

atio

n:C

aO +

MgO

con

tent

> 8

0%M

gO c

onte

nt <

10%

Reac

tivi

ty w

ith

wat

er,e

stab

lishe

d in

ac

cord

ance

wit

h EN

459-

2,sh

all a

chie

ve a

te

mpe

ratu

re o

f at

leas

t 60

deg

rees

C

wit

hin

25 m

inut

es.

(Les

s re

acti

ve Q

uick

limes

may

be

used

pr

ovid

ing

com

plet

e hy

drat

ion

is e

nsur

ed

befo

re f

inal

com

pact

ion.

) Pa

rtic

le s

ize:

For

in-s

itu

trea

tmen

ts 1

00%

pass

ing

a 10

mm

sie

ve a

nd a

t le

ast

95%

pas

sing

a 5m

m s

ieve

or

fine

r.W

here

air

born

e du

st i

sle

ss c

riti

cal,

such

as

a se

aled

sta

tic

mix

ing

plan

t,fi

ner

grad

es o

f qu

ickl

ime

may

be

used

.W

here

a s

eale

d m

ixin

g pl

ant

is t

o be

use

dan

d du

st is

not

a c

once

rn H

ydra

ted

Lim

e to

BS

EN 4

59-1

:200

1,C

L90

may

be

cons

ider

ed.T

hedr

ying

rea

ctio

n ac

hiev

ed w

ith

Qui

cklim

e w

illno

t be

pre

sent

usi

ng H

ydra

ted

Lim

e.

4.3

GG

BSG

GBS

sha

ll co

mpl

y w

ith

BS66

99:1

992.

4.4

PFA

PFA

sh

all

com

ply

wit

h BS

38

92

part

1

orEN

450.

The

Engi

neer

may

als

o ap

prov

e dr

y or

con

diti

on

ed

(wet

) ru

n-o

f-st

atio

n

ash

prov

idin

g re

cen

t su

ppli

er

cert

ific

ates

indi

cati

ng

the

phys

ical

an

d ch

emic

alch

arac

teri

stic

s of

the

mat

eria

l ar

e av

aila

ble.

Befo

re u

se,c

ondi

tion

ed P

FA s

hall

be s

tore

d fo

rat

leas

t 3

days

at

min

imum

moi

stur

e co

nten

tof

10

%

and

scre

ened

to

re

mov

e pa

rtic

les

grea

ter

than

10m

m.

4.5

HR

B H

RB

shal

l com

ply

wit

h D

D E

NV

132

82:2

000.

4.6

Cem

ent

Cem

ent

shal

l be

por

tlan

d ce

men

t co

mpl

ying

wit

h BS

EN

197

-1:2

000.

4.7

Wat

er

Wat

er

shal

l no

t co

ntai

n co

mpo

nent

s th

ataf

fect

the

per

form

ance

of

the

SHB.

5.C

om

posi

tio

n

5.1

SHB

shal

l be

m

ade

from

co

nsti

tuen

tsse

lect

ed fr

om s

ecti

on 4

usi

ng p

ropo

rtio

ns t

hat

sati

sfy

the

requ

irem

ents

of

this

sec

tion

and

the

perf

orm

ance

req

uire

men

ts o

f se

ctio

n 8,

part

icu

larl

y n

oti

ng

the

req

uir

emen

ts

of

sect

ions

8.

10,

8.11

an

d 8.

12

on

stre

ngth

,tr

affi

ckin

g an

d fr

ost

resi

stan

ce r

espe

ctiv

ely.

5.2

Unl

ess

othe

rwis

e ag

reed

by

the

Engi

neer

,th

e m

inim

um p

ropo

rtio

ns o

f a

cons

titu

ent

inan

y m

ix,b

y dr

y w

eigh

t of

the

tot

al m

ix,s

hall

be;

lime

1.5%

,GG

BS 3

%,P

FA 5

% (8

% in

the

cas

e of

cond

itio

ned

PFA

),H

RB 3

% a

nd c

emen

t 3%

.

6.M

etho

d St

atem

ent

6.1

Bef

ore

co

mm

ence

men

t o

f th

e m

ain

wor

ks,

the

cont

ract

or

shal

l pr

ovid

e a

full

met

hod

stat

emen

t.Th

is

shal

l sp

ecif

y th

eo

pera

tio

nal

pro

cedu

re

for

the

wo

rks,

site

prep

arat

ion,

type

of

plan

t an

d pr

ogra

mm

e.Sp

ecif

ic

deta

ils

shal

l be

su

pplie

d re

gard

ing

esti

mat

ed

dura

tion

s an

d in

terv

als

betw

een

the

mai

n

stag

es

of

the

trea

tmen

t,li

me

amel

iora

tion

st

ages

(i

f ap

plic

able

) an

d th

ehy

drau

lic

bin

der

addi

tio

n,

curi

ng

and

prot

ecti

on.

6.2

In

part

icu

lar,

the

met

ho

d st

atem

ent

shou

ld s

peci

fy t

he p

roce

dure

s,co

ntro

ls a

ndpr

odu

ctio

n

chec

ks

wit

h

resp

ect

to

site

prep

arat

ion,

pow

der

spre

adin

g,pu

lver

isat

ion

(if

appl

icab

le),

wat

er a

ddit

ion,

MC

V,d

epth

of

mix

ing

,co

mpa

ctio

n,

insi

tu

den

sity

mea

sure

men

t,le

vel

cont

rol,

fini

shin

g ro

lling

,cu

ring

and

pro

tect

ion.

6.3

The

met

hod

stat

emen

t sh

all

incl

ude

the

inte

nded

mix

ture

pro

port

ions

,the

sup

port

ive

data

to

just

ify

the

prop

orti

ons,

the

moi

stur

eco

nten

t an

d re

late

d M

CV

lim

its

and

bind

erad

diti

ons

for

all s

tage

s of

the

wor

k.

6.4

The

met

hod

stat

emen

t sh

all

incl

ude

asa

mpl

e re

cord

she

et t

o be

com

plet

ed f

or e

ach

con

stru

ctio

n

bay

deta

ilin

g;

con

stru

ctio

nti

mes

,sa

mpl

e an

d te

st l

ocat

ions

and

che

ckre

sult

s fo

r al

l co

ntro

l pa

ram

eter

s in

clud

ing

thos

e in

cla

use

6.2.

6.5

The

mai

n w

orks

sha

ll no

t co

mm

ence

unt

ilre

ceip

t of

a s

atis

fact

ory

met

hod

stat

emen

tan

d re

cord

she

et.

7.D

emo

nstr

atio

n ar

ea

7.1

Prio

r to

th

e co

mm

ence

men

t of

th

e m

ain

wo

rks,

the

con

trac

tor

shal

l u

nde

rtak

e a

dem

on

stra

tio

n

area

o

f at

le

ast

80

0m

2

conf

orm

ing

to

his

met

hod

stat

emen

t.Th

ede

mon

stra

tion

are

a sh

all

cons

ist

of a

t le

ast

2fu

ll-w

idth

bay

s so

as

to i

nclu

de a

tra

nsve

rse

end-

of-b

ay jo

int.

7.2

The

dem

onst

rati

on a

rea

may

be

acce

pted

into

the

perm

anen

t w

orks

wit

h th

e ag

reem

ent

ofth

e En

gine

er.

8.M

ixtu

re P

erfo

rman

ce a

nd C

ons

truc

tio

nRe

quir

emen

ts

The

freq

uenc

y of

tes

ts,c

ontr

ols

and

chec

ks s

hall

bein

acc

orda

nce

wit

h 8.

14.

8.1

Spre

ad r

ates

Wit

h th

e ex

cept

ion

of c

ondi

tion

ed P

FA,w

hich

sha

llbe

spr

ead

by b

lade

,dry

pow

ders

sha

ll be

spr

ead

bypu

rpos

e-m

ade

spre

ader

s at

ra

tes

high

en

ough

to

avoi

d no

n-un

ifor

mit

y an

d lo

w e

noug

h to

min

imis

edi

spla

cem

ent

by p

lant

tha

t tr

aver

se t

he a

rea

just

spre

ad.T

his

will

nor

mal

ly b

e be

twee

n th

e ra

nges

8 –

20 k

g/m

2 .

8.2

Am

elio

rati

on

Whe

re

lime

is

used

to

am

elio

rate

(b

reak

do

wn)

cohe

sive

soi

ls p

rior

to

the

addi

tion

of G

GBS

,PFA

,HR

Bor

cem

ent,

it s

hall

be a

dded

and

mix

ed w

ith

the

soil

not

less

tha

n 24

hou

rs n

or m

ore

than

72

hour

s be

fore

the

subs

eque

nt a

ddit

ion.

For

sulf

ate

bear

ing

cohe

sive

soils

thi

s pe

riod

sha

ll be

bet

wee

n 48

and

72

hour

s.D

urin

g th

is

peri

od

it

mus

t be

en

sure

d th

at

any

quic

klim

e ad

ded

to t

he s

oil

is f

ully

hyd

rate

d.Th

em

oist

ure

cont

ent

at t

his

stag

e sh

all b

e no

t le

ss t

han

the

OM

C (

or m

ore

than

the

equ

ival

ent

MC

V)

for

the

lime

mod

ifie

d m

ixtu

re

dete

rmin

ed

in

acco

rdan

cew

ith

the

2.5k

g Pr

octo

r m

etho

d of

BS1

924.

8.3

Mix

ing

and

pulv

eris

atio

n M

ixin

g an

d pu

lver

isat

ion

shal

l be

car

ried

out

by

one

or

mor

e pa

sses

of

a

purp

ose

mad

e m

ixer

un

til

unif

orm

ity

is a

chie

ved.

In t

he c

ase

of a

mel

iora

tion

of

cohe

sive

soi

ls (

8.2)

,the

deg

ree

of p

ulve

risa

tion

of t

hefu

ll de

pth

of t

reat

men

t af

ter

lime

addi

tion

sha

ll be

inex

cess

of

30%

,or

othe

r ag

reed

val

ue,d

eter

min

ed i

nac

cord

ance

wit

h BS

1924

.Fo

r co

hesi

ve m

ixtu

res

afte

r fi

nal

mix

ing

of t

he f

inal

cons

titu

ent

addi

tion

,th

e de

gree

of

pulv

eris

atio

n of

the

full

dept

h of

lay

er s

hall

be i

n ex

cess

of

60%

or

othe

r ag

reed

val

ue.

NO

TE:

The

mea

sure

men

t o

f th

e de

gree

o

fpu

lver

isat

ion

may

be

diff

icul

t w

ith

mix

ture

s at

or

wet

ter

than

the

OM

C.

8.4

Dep

th o

f m

ixin

g.Th

e de

pth

of m

ixin

g at

all

rele

vant

sta

ges

of t

hepr

oces

s sh

all

be c

heck

ed u

sing

sui

tabl

e re

fere

nce

stat

ion

s to

en

sure

th

at

afte

r fi

nal

tr

im

and

com

pact

ion,

the

fina

l th

ickn

ess

of t

he l

ayer

is

tosp

ecif

icat

ion.

8.5

Fina

l wat

er c

ont

ent

At

fin

al

com

pact

ion

,th

e m

ois

ture

co

nte

nt

for

gran

ular

mix

ture

s sh

all

be n

ot l

ess

than

0.9

OM

Cde

term

ined

in a

ccor

danc

e w

ith

the

vibr

atin

g ha

mm

erm

etho

d of

BS1

924,

and

for

cohe

sive

mix

ture

s no

tle

ss t

han

the

OM

C (

or m

ore

than

the

equ

ival

ent

MC

V)

dete

rmin

ed i

n ac

cord

ance

wit

h th

e 2.

5 kg

Proc

tor

met

hod

of B

S192

4.

8.6

Co

mpa

ctio

nFi

nal

com

pact

ion,

incl

udin

g fi

nish

ing

rolli

ng,s

hall

beco

mpl

eted

wit

hin

2 ho

urs

of m

ixin

g of

cem

ent,

4ho

urs

for

GG

BS a

nd H

RB,

and

6 ho

urs

for

PFA

.Whe

rea

sing

le p

owde

r is

add

ed o

ver

2 op

erat

ions

,the

tim

esh

all a

pply

fro

m t

he m

ixin

g of

the

fir

st a

pplic

atio

n.

8.7

Surf

ace

fini

shO

n co

mpl

etio

n of

fin

al c

ompa

ctio

n,th

e su

rfac

e of

the

laye

r sh

all

be w

ell

clos

ed,f

ree

from

mov

emen

tun

der

com

pact

ion

plan

t,an

d fr

ee f

rom

rid

ges,

crac

ks,

loos

e m

ater

ial,

segr

egat

ed a

reas

,pot

hol

es,r

uts

and

othe

r de

fect

s.O

n no

acc

ount

is it

per

mis

sibl

e to

add

thin

laye

rs o

f m

ater

ial t

o bu

ild u

p ar

eas

that

are

low

once

rol

ling

has

star

ted.

8.8

Den

sity

The

full

dept

h of

the

lay

er s

hall

be c

ompa

cted

to

anav

erag

e de

nsit

y of

not

less

tha

n 95

% o

f th

e av

erag

efr

esh

wet

den

sity

of

the

stre

ngth

spe

cim

ens

mad

e in

acco

rdan

ce w

ith

clau

se 8

.10.

The

insi

tu w

et d

ensi

tysh

all

be m

easu

red

usin

g a

nucl

ear

dens

ity

gaug

e in

acco

rdan

ce w

ith

BS19

24:

1990

.Th

e av

erag

e in

situ

dens

itie

s sh

all

rela

te t

o th

e m

ean

of t

he r

esul

ts f

oron

e da

y pr

oduc

tion

sam

ples

spe

cifi

ed in

Tab

le S

HB.

8.9

Seal

ing

Imm

edia

tely

on

com

plet

ion

of c

ompa

ctio

n,th

e su

rfac

eof

the

lay

er s

hall

be s

eale

d w

ith

a bi

tum

en e

mul

sion

appl

ied

at

the

rate

of

0.

5 lit

re/m

2 .A

lter

nati

vely

anot

her

appr

oved

pro

duct

at

an e

quiv

alen

t ap

plic

atio

nm

ay b

e us

ed o

r a

sing

le s

urfa

ce d

ress

ing

(see

8.1

1) t

oac

hiev

e a

cont

inuo

us a

nd c

onsi

sten

t se

al a

cros

s th

ew

hole

are

a of

the

wor

ks.

8.10

Str

engt

h St

reng

th

shal

l be

m

easu

red

usin

g sa

mpl

es

of

the

mix

ture

rep

rese

ntin

g th

e fu

ll de

pth

of t

he l

ayer

aft

erfi

nal

mix

ing.

Gro

ups

of

cubi

c or

1:

1 cy

lindr

ical

spec

imen

s re

pres

enti

ng

one

day’

s w

ork

shal

lde

term

ine

the

aver

age

com

pres

sive

str

engt

h.Th

eysh

all

be m

ade

in r

igid

pla

stic

(H

DPE

) m

ould

s an

dco

mpa

cted

to

refu

sal

wit

hin

one

hour

of

the

fina

lco

nsti

tuen

t ad

diti

on

in

acco

rdan

ce

wit

h ei

ther

BS19

24 o

r us

ing

MC

V a

ppar

atus

.The

spe

cim

ens

shal

lbe

sea

led

and

cure

d as

des

crib

ed in

BS1

924-

2,se

ctio

n4.

1.6,

usin

g th

e re

com

men

dati

ons

for

cem

ent

to c

over

SHB

that

con

tain

cem

ent

and

the

reco

mm

enda

tion

sfo

r lim

e to

cov

er S

HB

that

do

not

cont

ain

cem

ent.

The

stre

ngth

s re

cord

ed s

hall

be n

ot l

ess

than

1 M

Pa o

rot

her

spec

ifie

d va

lue

(see

8.1

1 an

d 8.

12).

NO

TE 1

:W

hate

ver

the

age

of t

esti

ng a

nd c

urin

gco

ndit

ions

,it

shou

ld b

e no

ted

that

SH

B m

ade

from

hig

h

plas

tici

ty

clay

s m

ay

stru

ggle

to

re

ach

com

pres

sive

str

engt

hs o

f 1

MPa

.

NO

TE 2

:A

s an

alt

erna

tive

to,

or in

con

junc

tion

wit

h,co

mpr

essi

ve s

tren

gth,

labo

rato

ry o

r in

situ

sur

face

stif

fnes

s ca

n

be

spec

ifie

d.Fo

r gu

idan

ce,

inco

mpa

riso

n w

ith

the

abov

e co

mpr

essi

ve s

tren

gth,

labo

rato

ry N

AT s

tiff

ness

wou

ld r

ange

upw

ards

fro

m10

00 M

Pa a

nd,d

epen

ding

on

age

and

tem

pera

ture

,in

situ

su

rfac

e st

iffn

ess

fro

m

20

0

MPa

.M

CV

appa

ratu

s h

as

been

fo

un

d su

itab

le

for

the

man

ufac

ture

of

NAT

sti

ffne

ss s

peci

men

s.

NO

TE

3:A

s a

furt

her

alte

rnat

ive

to

com

pres

sive

stre

ngth

,so

aked

C

BR

test

ing

may

be

em

ploy

ed.

Typi

cally

,a

CBR

val

ue o

f 10

0% m

ay b

e co

nsid

ered

equi

vale

nt t

o 1

MPa

com

pres

sive

str

engt

h.

8.11

Tra

ffic

abili

ty

Unl

ess

agre

ed

othe

rwis

e,co

nstr

ucti

on

plan

t an

dtr

affi

c sh

all n

ot r

un o

n th

e la

yer

othe

r th

an t

o en

able

cons

truc

tion

of

the

over

lyin

g la

yer.

Not

e:Ex

peri

ence

su

gges

ts

that

SH

B m

eeti

ng

the

stre

ngth

lev

el o

f 1

MPa

spe

cifi

ed i

n 8.

10 s

houl

dpr

ovid

e a

suff

icie

ntly

rob

ust

laye

r fo

r si

te t

raff

icki

ngas

soci

ated

w

ith

the

next

la

yer

and

poss

ibly

fo

rdr

aina

ge a

nd e

dge

deta

il w

ork.

Whe

re t

raff

icki

ng w

illbe

lig

ht,a

spe

cifi

ed s

tren

gth

as l

ow a

s 0.

5 M

Pa m

aysu

ffic

e.W

here

hea

vy t

raff

icki

ng i

s ex

pect

ed t

hen

asp

ecif

ied

stre

ngt

h

of

at

leas

t 1

.5

MPa

w

ill

bene

cess

ary.

In t

he l

ater

cas

e,co

nsid

erat

ion

shou

ld b

egi

ven

to t

he a

pplic

atio

n of

a s

urfa

ce d

ress

ing. lime

thin

k

21425_specPav1_sheet 13/1/06 12:12 pm Page 1

Page 2: Model Specification for Pavement Layers made 8. … Specification for Pavement Layers made ... furnace slag,pulverised fuel ash,cement and hydraulic road binder. ... fresh wet density

spec

ific

atio

n data

BR

ITIS

H L

IME

AS

SO

CIA

TIO

N

Qua

rry

Pro

duct

s A

ssoc

iatio

n,G

illin

gham

Hou

se,

38-4

4 G

illin

gham

Str

eet,

Lond

on

SW

1V 1

HU

Te

l 020

7 96

3 80

00

Fax

020

7 96

3 80

01

emai

l inf

o@qp

a.or

g

3pa

vem

ents

The

Brit

ish

Lim

e A

ssoc

iati

on is

one

of

the

cons

titu

ent

bodi

es o

f th

e Q

uarr

y Pr

oduc

ts A

ssoc

iati

on,t

he t

rade

asso

ciat

ion

for

the

aggr

egat

e,as

phal

t an

d re

ady-

mix

edco

ncre

te in

dust

ries

.w

ww

.bri

tish

lime

.org

8.12

Fro

st r

esis

tanc

e Th

e SH

B la

yer

shal

l ha

ve s

uffi

cien

t st

reng

th,

prot

ecti

on o

r bi

nder

add

itio

n to

wit

hsta

nd

surf

ace

fro

st

effe

cts

duri

ng

and

afte

r

cons

truc

tion

.In

add

itio

n it

sha

ll be

abl

e to

wit

hsta

nd f

rost

hea

ve if

use

d w

ithi

n th

e zo

ne

of f

rost

pen

etra

tion

whe

re g

roun

d w

ater

can

be d

raw

n-up

into

the

SH

B la

yer.

If t

he d

esig

n in

dica

tes

the

SHB

laye

r w

ill b

e

wit

hin

450m

m o

f th

e ro

ad s

urfa

ce,o

r 35

0mm

if t

he a

nnua

l fro

st in

dex

of t

he s

ite

is le

ss t

han

50

,th

en

resi

stan

ce

to

fro

st

mu

st

be

dete

rmin

ed in

acc

orda

nce

wit

h BS

1924

:Par

t 2

and

the

amen

ded

BS81

2 te

st.

This

is

in a

ccor

danc

e w

ith

clau

se 6

02.1

9 of

the

Spec

ific

atio

n fo

r H

ighw

ay W

orks

.Fr

ost

susc

epti

bilit

y sh

ould

be

dete

rmin

ed a

fter

28

days

cur

e bu

t th

is m

ay b

e ex

tend

ed t

o 56

day

s

if t

he m

ater

ial

is s

low

to

gain

str

engt

h an

d

deve

lop

fros

t re

sist

ance

.

Not

e 1:

It

is

advi

sed

that

du

ring

co

nstr

ucti

on

and

prio

r to

ove

rlay

ing,

the

tem

pera

ture

of

SHB

shal

l not

fal

l bel

ow 5

ºC.I

n or

der

to a

llow

SH

B

to g

ain

adeq

uate

str

engt

h be

fore

the

fir

st

fro

sts,

it

is

reco

mm

ende

d th

at

SHB

cons

truc

tion

sha

ll no

t be

und

erta

ken

afte

r th

e

end

of

Oct

obe

r an

d in

th

e ca

se

of

the

lime/

PFA

bin

der

com

bina

tion

,no

t af

ter

the

end

of S

epte

mbe

r.

8.13

Vo

lum

e st

abili

ty

Vol

ume

stab

ility

tes

ting

of

the

mix

ture

sha

ll be

car

ried

out

in a

ccor

danc

e w

ith

the

imm

ersi

on t

est

inBS

1924

and

sat

isfy

the

req

uire

men

ts o

f Ta

ble

VS.

The

seal

ed c

urin

g pe

riod

pri

or t

o im

mer

sion

sha

llbe

28

days

and

the

imm

ersi

on p

erio

d 32

day

s.

TABL

E V

S

SHB

type

Imm

erse

d st

reng

th in

MPa

%ag

e vo

lum

etri

c sw

ellin

gC

ohes

ive

> 6

5% o

f no

n-im

mer

sed

stre

ngth

at

60 d

ays

< 2

Gra

nula

r>

80%

of

non-

imm

erse

d st

reng

th a

t 60

day

s<

1

NO

TE:T

he B

S te

st c

an b

e ca

rrie

d ou

t on

cyl

inde

rs a

s w

ell a

s cu

bes

and

can

be c

arri

ed o

ut a

t ea

rlie

rag

es w

ith

or w

itho

ut a

ccel

erat

ed c

urin

g if

con

veni

ent.

8.14

Tes

ting

fre

quen

cyC

ompl

ianc

e w

ith

the

abov

e re

quir

emen

ts s

hall

be d

eter

min

ed i

n ac

cord

ance

wit

h Ta

ble

SHB

atlo

cati

ons

agre

ed w

ith

the

Engi

neer

.

TABL

E SH

B

Test

/co

ntro

lRe

fere

nce

clau

seSu

gges

ted

freq

uenc

y (m

ay b

e m

odi

fied

eit

her

way

dep

endi

ng o

n pe

rfo

rman

ce a

nd t

he

natu

re o

f th

e jo

b)O

N T

HE

CO

NST

ITU

ENTS

:So

il:m

/c,p

last

icit

y or

gani

cs1

per

1,00

0m2

carr

ied

out

and

repo

rted

inan

d to

tal p

oten

tial

sul

fate

4.1

adva

nce

of t

he w

orks

Add

ed c

onst

itue

nts:

4.2,

4.3,

4.4,

Wee

kly

Supp

lier

cert

ific

ate

4.5,

4.6

Add

ed c

onst

itue

nts:

8.1

3 pe

r 50

0m2

Spre

ad r

ates

ON

TH

E SH

B:M

oist

ure

cont

ent/

MC

V8.

21

per

500m

2bu

t no

t le

ss t

han

3 pe

r da

y af

ter

lime

addi

tion

Moi

stur

e co

nten

t/M

CV

8.5

1 pe

r 50

0m2

but

not

less

tha

n 6

per

day

at f

inal

com

pact

ion

If a

pplic

able

,pul

veri

sati

on8.

31

per

500m

2bu

t no

t le

ss t

han

3 pe

r da

yaf

ter

lime

addi

tion

If a

pplic

able

,pul

veri

sati

on8.

31

per

500m

2bu

t no

t le

ss t

han

3 pe

r da

yat

fin

al c

ompa

ctio

n D

epth

of

mix

ing

at a

ll8.

41

per

500m

2bu

t no

t le

ss t

han

5 pe

r da

y.re

leva

nt s

tage

sIn

-sit

u de

nsit

y8.

8D

itto

Com

pres

sive

str

engt

h8.

101

per

500m

2bu

t no

t le

ss t

han

3 pe

r da

y*Fi

nal l

evel

8.4

To b

e ag

reed

but

for

a r

oad

sugg

est;

Gri

d:10

m lo

ng,2

m t

rans

vers

eV

olum

e st

abili

ty8.

131

pair

per

300

0 m

2bu

t no

t le

ss t

han

1 pa

ir p

er d

ay*

*

Thus

a m

inim

um o

f 5

stre

ngth

spe

cim

ens

are

mad

e pe

r da

y;th

e av

erag

e w

et d

ensi

ty o

f th

e 5

prov

idin

g th

e ta

rget

den

sity

for

the

insi

tu d

ensi

ty.

Rev

:12

July

200

4

BR

ITIS

H L

IME

AS

SO

CIA

TIO

N

21425_specPav1_sheet 13/1/06 12:12 pm Page 2


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