CA2122497A1 - A method of preparing an emulsion- or asphalt-concrete for use as a road material - Google Patents
A method of preparing an emulsion- or asphalt-concrete for use as a road materialInfo
- Publication number
- CA2122497A1 CA2122497A1 CA002122497A CA2122497A CA2122497A1 CA 2122497 A1 CA2122497 A1 CA 2122497A1 CA 002122497 A CA002122497 A CA 002122497A CA 2122497 A CA2122497 A CA 2122497A CA 2122497 A1 CA2122497 A1 CA 2122497A1
- Authority
- CA
- Canada
- Prior art keywords
- bitumen
- emulsion
- binding agent
- stone
- fraction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
- Colloid Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Tires In General (AREA)
- Cosmetics (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In the production of emulsion concrete to be laid out as a road material it is customary that the applied stone fractions are mixed together with a binder, which is a bitumen emulsion based on a relatively low viscid bitumen, as the material would otherwise be very difficult to shape by the laying operation. According to the invention the coarse stone fraction is pretreated with a rapid breaking emulsion based on high viscid bitumen, and only thereafter the fine stone fraction with low viscid binder is added. Thereby it is possible to maintain a good shapeability of the material and yet obtain a significantly improved bonding of or in the laid out material.
In the production of emulsion concrete to be laid out as a road material it is customary that the applied stone fractions are mixed together with a binder, which is a bitumen emulsion based on a relatively low viscid bitumen, as the material would otherwise be very difficult to shape by the laying operation. According to the invention the coarse stone fraction is pretreated with a rapid breaking emulsion based on high viscid bitumen, and only thereafter the fine stone fraction with low viscid binder is added. Thereby it is possible to maintain a good shapeability of the material and yet obtain a significantly improved bonding of or in the laid out material.
Description
W093/0~ PCTIDK92~31~
2122~g7 A method oS pseparing an e~ulsion- oz asphalt-concrats ~or US2 as a road ~aterial.
~ he pr~sent i~vention relatcs to a ~e~hod of pseparing an e~ulsion- or asph~lt-c~ncr~te ~or us~ as road ~ater~al.
It is a vQll ~own s~ght t~at asp~alt concret~ is laid out in a s~oking hot condit~on, ~hereby lt is ~o~sible ~o ~ep the ~xtur~ o~ stones and bitD~en su~t3bly s~apa~le ~or ~n e~en laying-~ut an co~pr~ssion, just as the ~ix~ure ~ay t~en have a large co~tent of hi~h ~sc$d ~itu~e~, the~~by ensuring a go~d ~onding and yet a c~-ta~n, desired ~esiliency in ~e laid-out ~ater~al, when its tYmpera~ure dec_eases to am~ient te~peraturs. Only it is vesy ene-gy consuming to ~oct ~he a~sociated heat$~g og the ~aterial.
On thi5 ~acXg~ound has been deqeloped a 'cold' t~chnlgue, wbic~ ~ay ~ell ~ave ce ~a~n drawbacXs or li~itaticns, kut n2vertheless i5 COn8 ~ ~es~d adv~ntag~ous ~n that the ~eating can-be avoi~ed. ~he t~c~niquc is based on th~ ~se o~ a bitumen e~ulsion in admixt~re ~it~
a graded stonc ~ater~al. An agueous kitumen Qmulcion has no part~culas bond~ng ability o~ its own, ~ut ~n t~me a so-called 'broaXin~' o~ the emulsion occ~rs, wher~by S~2 ~u~ ~ tad ~i~umen ~rac~ions ~loat togethe~ and the wat~r ~s ~sgrega~ed, guch t~at the ~itumen may ther~t~r act a5 a ~dlng agent that can st~ck to t~e stone s~rface~
~nd bond th~sa togeth-r. By m-ans of dl~fesent a~dit~es ~t is Foss$ble ~o contr~l r~th ac~urately w~n t~
breaX~ng shculd t3ka pla~-e aStar the m~xin~ operation.
St ~s achi-va~le, therefore, that ~he ~ix~re can ~c preparad and ~ransportad to the laying araa and be :`~
la~d-cut t~erain prior to the ~r~ak~ng ha~ing ~rocaed~d to the point ~hcra the material ~ill not t~creat~
WO 93/09295 PC~IDK92J0031~
2122~g7 A method oS pseparing an e~ulsion- oz asphalt-concrats ~or US2 as a road ~aterial.
~ he pr~sent i~vention relatcs to a ~e~hod of pseparing an e~ulsion- or asph~lt-c~ncr~te ~or us~ as road ~ater~al.
It is a vQll ~own s~ght t~at asp~alt concret~ is laid out in a s~oking hot condit~on, ~hereby lt is ~o~sible ~o ~ep the ~xtur~ o~ stones and bitD~en su~t3bly s~apa~le ~or ~n e~en laying-~ut an co~pr~ssion, just as the ~ix~ure ~ay t~en have a large co~tent of hi~h ~sc$d ~itu~e~, the~~by ensuring a go~d ~onding and yet a c~-ta~n, desired ~esiliency in ~e laid-out ~ater~al, when its tYmpera~ure dec_eases to am~ient te~peraturs. Only it is vesy ene-gy consuming to ~oct ~he a~sociated heat$~g og the ~aterial.
On thi5 ~acXg~ound has been deqeloped a 'cold' t~chnlgue, wbic~ ~ay ~ell ~ave ce ~a~n drawbacXs or li~itaticns, kut n2vertheless i5 COn8 ~ ~es~d adv~ntag~ous ~n that the ~eating can-be avoi~ed. ~he t~c~niquc is based on th~ ~se o~ a bitumen e~ulsion in admixt~re ~it~
a graded stonc ~ater~al. An agueous kitumen Qmulcion has no part~culas bond~ng ability o~ its own, ~ut ~n t~me a so-called 'broaXin~' o~ the emulsion occ~rs, wher~by S~2 ~u~ ~ tad ~i~umen ~rac~ions ~loat togethe~ and the wat~r ~s ~sgrega~ed, guch t~at the ~itumen may ther~t~r act a5 a ~dlng agent that can st~ck to t~e stone s~rface~
~nd bond th~sa togeth-r. By m-ans of dl~fesent a~dit~es ~t is Foss$ble ~o contr~l r~th ac~urately w~n t~
breaX~ng shculd t3ka pla~-e aStar the m~xin~ operation.
St ~s achi-va~le, therefore, that ~he ~ix~re can ~c preparad and ~ransportad to the laying araa and be :`~
la~d-cut t~erain prior to the ~r~ak~ng ha~ing ~rocaed~d to the point ~hcra the material ~ill not t~creat~
WO 93/09295 PC~IDK92J0031~
2~2 1g7 s~$ta~1y oas ~ ly shap~a~le .
~ r t~e emuls~on i5 or has not ~oken almost a~ on s $t ha~ ~een laid cut, one prob~m amcng ot~e~s w~ll at ~n case oi~ tOE~ ! lau~g out a ~ore or 1~ ~ct~iYe whin~ out o~ t~e es~u~5~0D, ~y taXe plac~, t~5 o~ c0~5e ~35 h~ghly ~u~ cr ir~ t~ae cas~ ~ven ~atal ~!or t~Q ~orX.
~ t i5 well Xno~n, there~o~, that t~e ~s~aX~ng shcu~d bq adjust~ s,o as ~o ha~ro ~roca~æd, w~del.y already at the t~te o:C ~e 12y~lg o~t, ~en t~oYgh ~is will c~eate tl~e pro~l~m ~at ~t i~ swt poss~ble to usc ~y pa~t~c~la~ly ~ard bind~g ~tu~en ~n t~e e~3~1sion.
TS the ~reaXing oS an ~sion wi~'~ s~ a ~ard or h~gh ~i~cid ~itu~Ltes~ ~as proceeded wid~ly jus~ ore t~e lay~ng out, it uill be ~possibt e to effect t~e lay~ns worX in an ~sy an~! orde~ly ~ne_ under 'col~' condit~ons, becaus~ t~Q ~atssial wi'1 t~en be so ongly bondcd toget~e--t~at lt car~ot be reaso~a3:~1y 1Y ~haPab1Q~
It ~s b-co~ z comaton practicc S~at for usual applications of ~ulsio~ conc_ete it is cnly possi~le to ~se ~ul~ions ~as~d on ~ rslativ~ly 10~ riscid ~itu~en having a ~sco~ity o~ up to some 3~00 ~m2/s2c at ÇO C.
t~ q~, suc~ mata~ial~ ~ill have ~
relative~y p~or s~lity, so t!~e me'~od is used only on roads with a ~ow tr~S~ic load.
~ :'c could ~e ~ossible to use a ~it ~ ~ o~ a highe--~i~c~ y ~nd cven ~n in~e~ed a~ount o~ emul~ion csr~ ~ t~k-n t~at t~ e~ulsicn bre~Xs only partly duri ~ ~h~ ~ixing ~r~c~s~ ar prior to the laying out,.
~t al:~o this wc~:Lcl cr~ats sesiou-~ prokl~. De~ t oS t~e g~a~n c~re o~ e stor~e ~t~ial it ~ay be ~po5812~1e to s~ure an apt~ t~men percaa~age, se the s~one ~ter~.~ can o~ly 'car~' a c~rtain ~ount o~ unbrokos~ essu3.si~n wit~out s~plu~ emulsion S~ Lng oi~. SUG~ w Cl~ C~ inco~splet~ly ~roken . ..: . ~ .. ~ .. . . -- .... ..
. . .
WO 93~09295 PCr/DK92/0031~
212 2 ~ ~ 7 emuls~on ~ill taX2 plac~ d~ ng t~e tsuc3c trans~ort oS
t~e mat~ial from t~ mixin~ placs to t2~e uorXing place ~nd t~ rc sis2 to co~si~er~le a:luc~ging pro~le~s ~or o~-r ro~-u~ lor~o-~, a'~-r ~ts laying out and c~ction o~ t~Q road, t~ ~tsrial ~ill Qx~b~t caviti holsling unbrol~en Q~ulsior~ t~at w~ll cause t:he finished road layes, dusir~g a ~on~ pesiod 0~ t~me, to ba ver~ s~nsit~-e to rain, uhl~ caus~s ~ was~ing o~t o~
~it~mcn.
S~ l~s e~lie~ ~-n s~co~i2~d t~_ w~t~ a ~i~zed, y~ su2~'~ci~t tot;~l a~ount o~ lon the S probla~ ~y ocs:ur t~at t~e e~ulsion is prQdcm~ ntly '~cr~ed' ~y the finer S OnQ f--actions, ~uch t~at a required total ~rappi:~g of the coa-se s'ones will not ~e aG~icved unles-~ still ~ore emulsion 1~ added. It ~as been proposcd to r~dy t.~is by ~.nitia~ly upplyi~g to the! mixing ~agc thc coa::~e stone frac:ion and the amount o~ lsion n co~sary ~or a total w~apping o~
thes~ ~tones~ Wh~lQ t~c ~in stone ~rac~on is added lates on, i~ r~uir~d togethe~ wi~h mcre emulsion, ~es c.g. ~A-A-923,85~ and Ga-c-334,~8. ~t ~s poss~blQ to h ~by aYosd a dirsc waste o~ ~urplus Qmulsion, ~ut the~ will be no r~s~lting guality i~provement o~ the la~d cut ~ater~al. :
~t ~s ~hc p~o~ o~ the inqe~tion to ~ro~ide a ~e~hod, ~y w~ich $t will ~e ~actically pcss~bl~ to ~aXe us- o~ an ~ls~on ~a-~ed on a notic~ably harder kitYmen, i.c. a bitu~cn o~ h~5hQr YisCo~ity, such that thQ laid out road layer c~n ~xh~bit a c~nsid~rt~ly incr~ased strY~gth and yet ~- suitably s~apQable ~n eonn~ct~on w~t~ the lay~ng-cut, without therea~ter ~eing sensi~le t~ any wash$ng cut o~ the bitumeno~s ~inding ~gen~.
Th ~3~ent~0n is b~sed on the c~nside~ation that the ~at~sial ~s ~ whol~ will ~e supple and sh~peablQ a~
lcng as the ~n~ s:one ~raction has ~ct been ~o~ded ~y a h~ gh viscid bitumen, whether or not th~ 6tones in ~Q
WO 93~0929~ PCr~DK92/0031~
4 2122~97 eoa~2 r~ac~iOn ha~e alr~a~y ~ sapp~ by a ~o~ or l~s~ brokcn ~ul io~ ~sed on his~ ~ ~scid b~=cn.
q~s h~s l~ad to a ~urthe~ reoogn~tion o~ ~e ~ ~at ~ al p~ase o~ t~e ~cinS p-oc~ss ~t uill b~
po~sibla to ~ ~ C0~5~ stone S:~act~on w~ an u~.s$on based on h~gh ~sc$d ~itu~ and wlt~ an a~ount t~~o~ sa~$sSy~ng the i~11 uzapp~ng need for t~e stones t~is fzactlon, ~hen this Q~ulsion ~s adaptad to br~a~
~SectiYaly ~z~dy d~$ng the ~xing ~roc-s3~ ~rkile t~e S~a stonc Sraction, also c~lled the ~orta~, can ~c added t~ seaSte~, wit~ lit~on of em~l ion, though now a diS~e~ent e~ulsion ~ased on a lo~ ~risc~d ~$t~en, ~ut still adapted to brc~X no late-- than ~y thc l~y~.ng out oS t~e mat~ial, that is pzior to oz ~hcrtly a~ter t~e layi~g o~t and prPqerably eYer~ be~or t~e nat~ aq~s the D~ixing plant.
~hc Slnally ad~ xed e~ulsion w~11 make the entir~ ~
ture 5uppl~ nd 20s3ablc, i.e. t~e mixt~ze can ~e la~d out evenly and Yith ordinary eguipment, althoush th~ stone~ o~ t~e c~ar~e ~-3c-~on ha~e ~'-ea~y been coat~d u~th a laye~ o~ broken, ~ard bond~ng bitu~en.
Becausa bath types oS Qmuls~on are adaptable to a total or eYt~si~ br~aking als~ady b~for- t~e ~xture lQa~es th~ ~xlng pl~nt, problcm~ ~ith r~spect to ~lo~ oS~
du~ing t2~n portation to the working a~ea ~ill be aYo~d-~, and the l~ia out layer w~ll be ~n~ensiti~e to ra~n r~ght Ss t~e b-g~nn~ng.
It ~a~ b-en ~ou~d that aft~r the laying out 8 ~grat~on b-t~en the 'hasd' bitumen on t~e coa~se ~OJIQ~ and the '~o~t' b~tu~en ln the ~iner stone rraction ~11 t~ pl~c~ rathe: socn, ~ that the res~lt ~ e a total bonding o~tained ~u~ck and ~it~
~ ~or- ~igh ~cid ~d thesewith bett~r bindin~ bitu~en t~an 80 Sa~ k~o~n or achieYable.
~hus, also in ~h~ proc~ss Or t~e ~nvention ~her~ i~
~ad~ uae o~ the r~spe-ti~ coars2 ~nd ~ine ~tone Wo 3~09~9~ Pcl/DK92/Qo3~
,~
5 212~49~
Sract~ol~s, ~ut now wit~ addition oS t~e czucial c~- cs~utance t~lat the ~ro ~racticns 2~ Qæted Yit~l ~spec~ive, vesy d~ ~i!ent e~ulsio~s .
princ~pl~ oS t:~e i~vention ~ay 2~æ
zldYantag~sly ~d also ~or 'ChQ produ~io~s o~ an asFhalt nat~ii~ i21 which t~e bi:rad~g ages~t i~ ~Qn ~ non-emulgat~d condition. ~ coar~ ~;tone fraction ~s heat~ to such a hi~ tA~perature, by whieh t~e stones can be totally coated by t~e ~nitlally zd~d high Yiscid bitumen, which, it~ ; is ~ated to as~e a viscosity suita2~ly lo~r ~or t~s pu~2os~. ~ eaftsr 1~ the Sine Srac~o~ ~g added to thc m~xe~ e~thsr c~ld or was~ cond$t$on all accordin~ ~o the appl$ed low Yiscid ~tumen, whic~ ~s also a~ed; t~s b~tu~en shoul~
h~ve ~ t~p at~re high enoush to c~nd~t~cn ~uc~ a low ~iscosity that thQ ~itumon can ~f~ctiv~ly coat the c~one p8rtic~es Or thc fine fraction. ~refesably, thls tempatu~e should be somewhat lower than the te~pcsature o~ thQ coarse fraction, s~ch that ~he coating of the coarse stones ~y t~e high ~iscid bitu~en will be stabilized.
Cenesally, wit~ the conside~ed ~ethcd it i~
pcss~ to ~os~ ~th a ~ery h~gh ~iscid ~it~en for thc ~nit~a~ mixin5 w~t~ t~e coarse ston~ ~sac~ion, just ~hen cas~ ~s takan th2t thc ~in~ ction is not added ~ntil an cx~en~e coating o~ t~Q coass~ s~on~s ha~ ~e~
obtained. As ~zr as thQ Qmuls~on ~nC:QtQ ~S concerned lt ~ important t~at the ral~vant 'hard' omuls~on i~ ~
~dely ~roken be20re thc 2in- ~raction an~ t~e associated 'so~t' e~ul4io~ is add~d, b~t it ~ a luc~y coincidenca t~t the very ad~t$on oS th~ ~ine stone ~ction, wlt~ it~ vcry large sur~ac~.~re~, stron~ly prcmote~ t~e kreaXing c~ t~e ha~ e~ul5~0n, su d that the ~att~x w~ raaX Si~ally al~ost au~o~at_cally ~t an ideal ~o~ent o~ t~e proc~ss. Wit~ t~e hot ~t~od i~ i~
su~Sicient to use a_~oderate he~ting, a~ ~e high ~iscid WO 93Jos295 PCr/DK92J0~31~
6 ~122~9 7 bit~en s~all nct b~ condition~d to bQ ~xed ~ e Sin~ ~to3~s f~act~on. All acc~ding to the applicat~on pu:cpose t~s ~itYm~ ~y ~Ye ~ YiS--os_ty e.g. in ~e ~ange o2' ~ooo - 7~00 2~Z/sec at 60 c.
w~t~ the use o~ soSt~ uS:~oS~ or ~ low c~d b~t~en, r~s~Qct~voly, ~n connQction with tl~
~21Q stone ~ract~on it is possi~le to ac~ieve a ho~og~ ad~r~ into the ~ a~ion, also here Y~t~o~t any extensiYe ~eating as ~a~ as t~e hot ~net~od ~ conc~rned. ~he ~iscos$ty o~ thQ rQl~ant bitum~n s~oul~ ~or3ally ~e sonewhat lowe~ t~at 3000 ~2/s2c, ~ut u~der ~pecial c~rc~stances th$s Sigurc may bc ~g~e~, Q~g. Up to 4-~000, t~ough Ctill noticaably s~aller than th~ q~ cosity ~gur~ o~ t~e ~pplicd h~sh visci~ biL~en.
~he we~ ght ratio bet~een the two Xinds of ~it~en ~ay ~ary a~l ac~ord~ng to ~e dispensa~y og t~ ~ater$al 3~xtur~ b~t a typical ~atio c~n ~e 60~PCS high viscid and 40~C~ lcw ~iscid ~itu~en. ~lrQady some 24 hours ~ter the lay~ng out o~ the nat~rial an e~ualization o~
the ~i~cosit$e~ will ha~ ta~en plac~, and on this bac~ground it ~s p ~cotly pos~ible, i' desired, to o~ta~n r~sulting viscosity figures o~ M3 10-30.000 or 3cre, t~i~ b-ing ~nheard ~n connec~ion wit~ conYentional ~u~s~on concrete and v~sy o~p~nsively a d ieva~le in ot~ ~ t~onal asphalt prepar~tion.
. ~h- ~ppl$-~ ;Yin~ plant can be a ~imple ~atc~ -m~x r or a continuous t~roughflow ~xc~, ~ut it ~ould be pos~ble tD u~e ~opasat~ ~ix ~ ~or ~- ~vi~ o~ the S-gp-Ct~Y b~nding ~gent into the rospect~Ye stone Ssactions ~nd a ~ep~rate mixer ~or the bzinging togcther oS tha thu~ pret~eat~d ~r~ctions.
Wben prepa~ing thc c3ulsion conc~ete it will ~e ~dv~ntageous to control ~ ~r~ g o~ the 'k~zd~
~n~ls$on such that ~t ~ill br~ak ~ 500n as a pract~ally total ~sapping Or the coz~se sto~es ~as taken pl~c~, ~.g. a~tss ~ ~ixing ~i~e cS 10-~2 scc~d~, :
WO 93/0929~ PCr/DK92~
7 2~22~97 ~ch ~t t~is ~lsion ~ill nct ~t t~e to ' diluted ' ~ e ss~s~guen~ly a~de~ ' s~ft~
as added in con~ection w~ e 2d~iSio~ o~ t~e ~i~e stone Sr~ction. 52~e~y ~e ha~d e~lsicn ca~ be dosed ~ ~C-~dZlnC~ Wit~ U~Q des~ad ~axi~ ca~y~ng capacisy o~ sto~cs o~ coa~se ~r?c~on, w~ile a dil~io~
o~ e emulsion ~ould cau~e a ueaX~ning o~ ~his casrying ~apac~ty and t~Le~y o~ possibility oS an e~icien~
xploitation o~ the hish v~scid bit~en.
Anoth i3p~:tant e~ect of the rapid addition o~
the ~i~e stone f:~c~ion as soon as the hard e~ulsion bas kcen d~stributed and broXen is that by thi ~ddi~on ~n ~d~anc-d adh-sion bet~een the stone~ o~ ~he coarsa ~raction ~ill be pr~vent2d, which could othe~~ise ~i~e rise to undes~d lu~p l~or::~ations. ~:n practic~ it is correspondingly ~mpo~tant ~hat the b~eikins o~ the added ~soft' c lsion taXes place no late- than by the Sini h~ng and d~l~vesing o~ the material mixtur~ ~r~m th~ n~x~ng plant, ~n ~rder to the~e~y co~nte-acin~ lat-s pro~lQ~s with respect to ~ashing out oS the ~ulsion a~t~r t~e layins out oS ~hQ mats:ial or alr~ady ~ur~g ; the t~ans~cr~atio~ the~eoS to the worXin~ plac~. ~t is i, less i~portan~ whethe~ the so~t emulsion is added ¦! ~r~e~ly b-~or-, concurrcqtly w~th, or ~iefly ~ftar t~
add~t~on of the ~ine stone Sraction.
It is ess~Rtial to notica that th~ very cont_oll~ng oS the~ ~r-ak~ng ti~ oS thQ appl~Qd Q~UlSions belongs to ~ oa~y well e~tabl~sh~d ~rt, such that th~s will not ha~e to be Surth r luc~datad ~ thQ prosent connect~on.
In conn-ction with the invention ~t will ~e po3~ible to pret~eat tha coars~ stone ~raction with the cmulsi~n conta~nin5 the hish ~iscid ~itumen, while by thR addition o~ the ~ine stonQ frac~on the~- is ~ot us~ ~ny onuls~n, k~t a ~itumeno~s b~n~Dg agent ha~n~
a gu~t~ low ~isc~sity, e.g ~3 ~500-2000 ~t 6~Q C.
Sh ~ dditive ~2y ~e ad~inestered ~n c~ld conditicn, wo 93/0929s pcr/DKs2~oo3l~
, 8 2122~97 and it ~ rander the ~aterial wcll shapea~le. 'n ~o Sas as t~e ~gration w~ sl-~d 2~ ~ n u~
ta~ pl~ac~ sacn -rte~ t~e laying out, a desi~a~l~ rs~sult ~ c ac~e~l- als~ i5 ~llanne~, even whe3~ the res~ t~en pe~C~1:a5Q 0~ ~3a s~at~rial ~y ~
~till ~gher ~y t~c ~:se o:! t~e 'soft' asn~lsio~ or t~e f~n~ stone fsaction.
~roaft~r a f~w examples oS dis~Qnsaries ac~r~ins ~o th~ $n~ention should ~Q giYQn:
Exa~ple 1:
1-- .
- Ston~ ~at ~al: 60 ~ei~ht percsnt oS 4-16 ~ coarse Sraction;
40~CS w~ght pe~cont oS 0-4 mc fine frac~ion~
Binding ase~t emulsion: 5ype ~: BE5~/20.000 Typ- 2: BE65M~ .000.
~ n tho~ d<nc~inations, "~ tands Sor "~it~men e3~1sion", n 65 n Sor thQ admixt~ry pe~contage o~ the bitu~en, ~R" ~or a rapidly breaking ~15ion, ~ Sor a ~ediu3 breaXing ~ulsion , and t.~e ~igur- indication~
20.000 an~ 3.000 Sor t~e YCscosity oS t~e r~spec~i~e l~ . bitu3QDs, rcasu~-d by ~r~/s~c. at 60 C.
; ~y ~p ~en~ ~t ~g st~blish~d that ~he breaXing t~oe ~or the c~ul~$on tyFs on the c~ar3e Srac~ion typc o~ ~ton-s ~ 8 c~rta~n ~oun~ d ~econd~, c.g. 12-14 second~.,5he ~oass- S~action is lntro~uc~t c 8 ntly and u~hout h-at~ng.~nto a Slow-~hrough ~;~er, ,at the ent~nc~ ~t o~ which the o~U~cion d the said type 1 is ~dded ky a Slo~ csrresponding to a weight a~ount oS ~-8 ~C~ o~ t~e stone w i~t. In the ~ixer the aSueou~
~o~u~$on o~ the ~uls$on ~111 be d~st ikuted e~nly aroun~ th~ 8tones ~n ~c~ scc~nds. A~ a follow~ng plac~
c~ the ~xer, c~rr~spond~ng to a ~atzrial ~sans~rtati~n t~e o~ 14-16 s-conds, a Slou oS the Slne stone Sract~on .
wo 93/09295 pcrlDg92~oo3l~
" , ~ .
9 21~97 ~ ~
~d ~uls~on ty~e 2 at ~ Ye~ght ratio o~ so~e ~.Oo~
added. !~he total product is eonvey~d ~u~es ~n ~IQ
er ~or ~ ve ~x~ng t~ ugh a~d~t~on~l 2~-30 ~eco~! c~s~ading ~pprox~at-ly ~o ~e bre~dng t~ o~ dsion typ~ 2, s~es~ter t~e ~r- ~e let o~t ~n a SloY to a ca~ h4 t~W3C taXe~
th~ c~llect~d mat ~al port~cn to a deli~csy appasat~s at t~e YcrXing s~t~, where thc lay~ng out ~s ~e~t-d not lat~r th~n 4_c ~cur5 ~t~r thQ ~r~pa~at~on o~ the ~t~r~ xt~r-. ~n the ~aid out c~ulsion c~nc~t-t~ e ~*~1 bc a res~dual bitu~en perc~ntage o~
S ~ v~ t~y S.
Ex~ple 2:
Stone matesi~1: 60 weight p~rc-nt o~ 5-18 mm coarse Sraction 40 ~e~ght pesc~nt o~ 0-S mm ~in~ Srac io~.
.
~ind~ng a~n~: $ype S: B 180 .
. ln t:~ s~ denominations nB" st:ands or a pure or non-~nulgat~d b~t~mon, ~le the Siguse 80 r~fs to a ~~atsat$on o2 180 at 2~ C, cor~spond~g to a ~cos~;y oS ~ome 60.000 D~2/~ec at 60 C. ~B
S.OOO ~o~ on~ulgated betu~en ha~ng a q~co~ty o~ ~.000 ~ZI~c at 60 C.
~800 ~ stones o~ th- coas~ Ssact~on ~eated to ~ 130~ C ~ ~ll~d ~nt~ a c~arge mixer, and aSl: ~t: OS ~Q ~ v~ ~0 X~;~ b~g age~t typq ', hc~tc~ to ~coe 130 C ~5 added. 8~ conds t~r~Stas 12~0 Xg o~ the ~ mc ~ac ion is added, this ~r~ctlon not h~ng to ~ h~at&d, and al30 60 X~ ~d~ng ~ge~t type 2, he~t~d to roughly 9C~ C~ When the WO 93/09295 P~/DK92/0031~ i 10 2~22~97 ~i~C~Q Fo~t~on oS' a~out 3 'cons has bq~n ho~og~ously .g. ~2~es 25 s~utnds~ o c~ go ~ 1~ out t.~ a ca~er ~uc3c, and care ~s t~c~ aQ ~iX~ ~
t ~ore tl~ 6 ho~s ~S~ on.
~c ~ t~~tt~e ~ t2~c ~xer can ~e ~o~e 60~ C.
., ,, . ~, :
~ r t~e emuls~on i5 or has not ~oken almost a~ on s $t ha~ ~een laid cut, one prob~m amcng ot~e~s w~ll at ~n case oi~ tOE~ ! lau~g out a ~ore or 1~ ~ct~iYe whin~ out o~ t~e es~u~5~0D, ~y taXe plac~, t~5 o~ c0~5e ~35 h~ghly ~u~ cr ir~ t~ae cas~ ~ven ~atal ~!or t~Q ~orX.
~ t i5 well Xno~n, there~o~, that t~e ~s~aX~ng shcu~d bq adjust~ s,o as ~o ha~ro ~roca~æd, w~del.y already at the t~te o:C ~e 12y~lg o~t, ~en t~oYgh ~is will c~eate tl~e pro~l~m ~at ~t i~ swt poss~ble to usc ~y pa~t~c~la~ly ~ard bind~g ~tu~en ~n t~e e~3~1sion.
TS the ~reaXing oS an ~sion wi~'~ s~ a ~ard or h~gh ~i~cid ~itu~Ltes~ ~as proceeded wid~ly jus~ ore t~e lay~ng out, it uill be ~possibt e to effect t~e lay~ns worX in an ~sy an~! orde~ly ~ne_ under 'col~' condit~ons, becaus~ t~Q ~atssial wi'1 t~en be so ongly bondcd toget~e--t~at lt car~ot be reaso~a3:~1y 1Y ~haPab1Q~
It ~s b-co~ z comaton practicc S~at for usual applications of ~ulsio~ conc_ete it is cnly possi~le to ~se ~ul~ions ~as~d on ~ rslativ~ly 10~ riscid ~itu~en having a ~sco~ity o~ up to some 3~00 ~m2/s2c at ÇO C.
t~ q~, suc~ mata~ial~ ~ill have ~
relative~y p~or s~lity, so t!~e me'~od is used only on roads with a ~ow tr~S~ic load.
~ :'c could ~e ~ossible to use a ~it ~ ~ o~ a highe--~i~c~ y ~nd cven ~n in~e~ed a~ount o~ emul~ion csr~ ~ t~k-n t~at t~ e~ulsicn bre~Xs only partly duri ~ ~h~ ~ixing ~r~c~s~ ar prior to the laying out,.
~t al:~o this wc~:Lcl cr~ats sesiou-~ prokl~. De~ t oS t~e g~a~n c~re o~ e stor~e ~t~ial it ~ay be ~po5812~1e to s~ure an apt~ t~men percaa~age, se the s~one ~ter~.~ can o~ly 'car~' a c~rtain ~ount o~ unbrokos~ essu3.si~n wit~out s~plu~ emulsion S~ Lng oi~. SUG~ w Cl~ C~ inco~splet~ly ~roken . ..: . ~ .. ~ .. . . -- .... ..
. . .
WO 93~09295 PCr/DK92/0031~
212 2 ~ ~ 7 emuls~on ~ill taX2 plac~ d~ ng t~e tsuc3c trans~ort oS
t~e mat~ial from t~ mixin~ placs to t2~e uorXing place ~nd t~ rc sis2 to co~si~er~le a:luc~ging pro~le~s ~or o~-r ro~-u~ lor~o-~, a'~-r ~ts laying out and c~ction o~ t~Q road, t~ ~tsrial ~ill Qx~b~t caviti holsling unbrol~en Q~ulsior~ t~at w~ll cause t:he finished road layes, dusir~g a ~on~ pesiod 0~ t~me, to ba ver~ s~nsit~-e to rain, uhl~ caus~s ~ was~ing o~t o~
~it~mcn.
S~ l~s e~lie~ ~-n s~co~i2~d t~_ w~t~ a ~i~zed, y~ su2~'~ci~t tot;~l a~ount o~ lon the S probla~ ~y ocs:ur t~at t~e e~ulsion is prQdcm~ ntly '~cr~ed' ~y the finer S OnQ f--actions, ~uch t~at a required total ~rappi:~g of the coa-se s'ones will not ~e aG~icved unles-~ still ~ore emulsion 1~ added. It ~as been proposcd to r~dy t.~is by ~.nitia~ly upplyi~g to the! mixing ~agc thc coa::~e stone frac:ion and the amount o~ lsion n co~sary ~or a total w~apping o~
thes~ ~tones~ Wh~lQ t~c ~in stone ~rac~on is added lates on, i~ r~uir~d togethe~ wi~h mcre emulsion, ~es c.g. ~A-A-923,85~ and Ga-c-334,~8. ~t ~s poss~blQ to h ~by aYosd a dirsc waste o~ ~urplus Qmulsion, ~ut the~ will be no r~s~lting guality i~provement o~ the la~d cut ~ater~al. :
~t ~s ~hc p~o~ o~ the inqe~tion to ~ro~ide a ~e~hod, ~y w~ich $t will ~e ~actically pcss~bl~ to ~aXe us- o~ an ~ls~on ~a-~ed on a notic~ably harder kitYmen, i.c. a bitu~cn o~ h~5hQr YisCo~ity, such that thQ laid out road layer c~n ~xh~bit a c~nsid~rt~ly incr~ased strY~gth and yet ~- suitably s~apQable ~n eonn~ct~on w~t~ the lay~ng-cut, without therea~ter ~eing sensi~le t~ any wash$ng cut o~ the bitumeno~s ~inding ~gen~.
Th ~3~ent~0n is b~sed on the c~nside~ation that the ~at~sial ~s ~ whol~ will ~e supple and sh~peablQ a~
lcng as the ~n~ s:one ~raction has ~ct been ~o~ded ~y a h~ gh viscid bitumen, whether or not th~ 6tones in ~Q
WO 93~0929~ PCr~DK92/0031~
4 2122~97 eoa~2 r~ac~iOn ha~e alr~a~y ~ sapp~ by a ~o~ or l~s~ brokcn ~ul io~ ~sed on his~ ~ ~scid b~=cn.
q~s h~s l~ad to a ~urthe~ reoogn~tion o~ ~e ~ ~at ~ al p~ase o~ t~e ~cinS p-oc~ss ~t uill b~
po~sibla to ~ ~ C0~5~ stone S:~act~on w~ an u~.s$on based on h~gh ~sc$d ~itu~ and wlt~ an a~ount t~~o~ sa~$sSy~ng the i~11 uzapp~ng need for t~e stones t~is fzactlon, ~hen this Q~ulsion ~s adaptad to br~a~
~SectiYaly ~z~dy d~$ng the ~xing ~roc-s3~ ~rkile t~e S~a stonc Sraction, also c~lled the ~orta~, can ~c added t~ seaSte~, wit~ lit~on of em~l ion, though now a diS~e~ent e~ulsion ~ased on a lo~ ~risc~d ~$t~en, ~ut still adapted to brc~X no late-- than ~y thc l~y~.ng out oS t~e mat~ial, that is pzior to oz ~hcrtly a~ter t~e layi~g o~t and prPqerably eYer~ be~or t~e nat~ aq~s the D~ixing plant.
~hc Slnally ad~ xed e~ulsion w~11 make the entir~ ~
ture 5uppl~ nd 20s3ablc, i.e. t~e mixt~ze can ~e la~d out evenly and Yith ordinary eguipment, althoush th~ stone~ o~ t~e c~ar~e ~-3c-~on ha~e ~'-ea~y been coat~d u~th a laye~ o~ broken, ~ard bond~ng bitu~en.
Becausa bath types oS Qmuls~on are adaptable to a total or eYt~si~ br~aking als~ady b~for- t~e ~xture lQa~es th~ ~xlng pl~nt, problcm~ ~ith r~spect to ~lo~ oS~
du~ing t2~n portation to the working a~ea ~ill be aYo~d-~, and the l~ia out layer w~ll be ~n~ensiti~e to ra~n r~ght Ss t~e b-g~nn~ng.
It ~a~ b-en ~ou~d that aft~r the laying out 8 ~grat~on b-t~en the 'hasd' bitumen on t~e coa~se ~OJIQ~ and the '~o~t' b~tu~en ln the ~iner stone rraction ~11 t~ pl~c~ rathe: socn, ~ that the res~lt ~ e a total bonding o~tained ~u~ck and ~it~
~ ~or- ~igh ~cid ~d thesewith bett~r bindin~ bitu~en t~an 80 Sa~ k~o~n or achieYable.
~hus, also in ~h~ proc~ss Or t~e ~nvention ~her~ i~
~ad~ uae o~ the r~spe-ti~ coars2 ~nd ~ine ~tone Wo 3~09~9~ Pcl/DK92/Qo3~
,~
5 212~49~
Sract~ol~s, ~ut now wit~ addition oS t~e czucial c~- cs~utance t~lat the ~ro ~racticns 2~ Qæted Yit~l ~spec~ive, vesy d~ ~i!ent e~ulsio~s .
princ~pl~ oS t:~e i~vention ~ay 2~æ
zldYantag~sly ~d also ~or 'ChQ produ~io~s o~ an asFhalt nat~ii~ i21 which t~e bi:rad~g ages~t i~ ~Qn ~ non-emulgat~d condition. ~ coar~ ~;tone fraction ~s heat~ to such a hi~ tA~perature, by whieh t~e stones can be totally coated by t~e ~nitlally zd~d high Yiscid bitumen, which, it~ ; is ~ated to as~e a viscosity suita2~ly lo~r ~or t~s pu~2os~. ~ eaftsr 1~ the Sine Srac~o~ ~g added to thc m~xe~ e~thsr c~ld or was~ cond$t$on all accordin~ ~o the appl$ed low Yiscid ~tumen, whic~ ~s also a~ed; t~s b~tu~en shoul~
h~ve ~ t~p at~re high enoush to c~nd~t~cn ~uc~ a low ~iscosity that thQ ~itumon can ~f~ctiv~ly coat the c~one p8rtic~es Or thc fine fraction. ~refesably, thls tempatu~e should be somewhat lower than the te~pcsature o~ thQ coarse fraction, s~ch that ~he coating of the coarse stones ~y t~e high ~iscid bitu~en will be stabilized.
Cenesally, wit~ the conside~ed ~ethcd it i~
pcss~ to ~os~ ~th a ~ery h~gh ~iscid ~it~en for thc ~nit~a~ mixin5 w~t~ t~e coarse ston~ ~sac~ion, just ~hen cas~ ~s takan th2t thc ~in~ ction is not added ~ntil an cx~en~e coating o~ t~Q coass~ s~on~s ha~ ~e~
obtained. As ~zr as thQ Qmuls~on ~nC:QtQ ~S concerned lt ~ important t~at the ral~vant 'hard' omuls~on i~ ~
~dely ~roken be20re thc 2in- ~raction an~ t~e associated 'so~t' e~ul4io~ is add~d, b~t it ~ a luc~y coincidenca t~t the very ad~t$on oS th~ ~ine stone ~ction, wlt~ it~ vcry large sur~ac~.~re~, stron~ly prcmote~ t~e kreaXing c~ t~e ha~ e~ul5~0n, su d that the ~att~x w~ raaX Si~ally al~ost au~o~at_cally ~t an ideal ~o~ent o~ t~e proc~ss. Wit~ t~e hot ~t~od i~ i~
su~Sicient to use a_~oderate he~ting, a~ ~e high ~iscid WO 93Jos295 PCr/DK92J0~31~
6 ~122~9 7 bit~en s~all nct b~ condition~d to bQ ~xed ~ e Sin~ ~to3~s f~act~on. All acc~ding to the applicat~on pu:cpose t~s ~itYm~ ~y ~Ye ~ YiS--os_ty e.g. in ~e ~ange o2' ~ooo - 7~00 2~Z/sec at 60 c.
w~t~ the use o~ soSt~ uS:~oS~ or ~ low c~d b~t~en, r~s~Qct~voly, ~n connQction with tl~
~21Q stone ~ract~on it is possi~le to ac~ieve a ho~og~ ad~r~ into the ~ a~ion, also here Y~t~o~t any extensiYe ~eating as ~a~ as t~e hot ~net~od ~ conc~rned. ~he ~iscos$ty o~ thQ rQl~ant bitum~n s~oul~ ~or3ally ~e sonewhat lowe~ t~at 3000 ~2/s2c, ~ut u~der ~pecial c~rc~stances th$s Sigurc may bc ~g~e~, Q~g. Up to 4-~000, t~ough Ctill noticaably s~aller than th~ q~ cosity ~gur~ o~ t~e ~pplicd h~sh visci~ biL~en.
~he we~ ght ratio bet~een the two Xinds of ~it~en ~ay ~ary a~l ac~ord~ng to ~e dispensa~y og t~ ~ater$al 3~xtur~ b~t a typical ~atio c~n ~e 60~PCS high viscid and 40~C~ lcw ~iscid ~itu~en. ~lrQady some 24 hours ~ter the lay~ng out o~ the nat~rial an e~ualization o~
the ~i~cosit$e~ will ha~ ta~en plac~, and on this bac~ground it ~s p ~cotly pos~ible, i' desired, to o~ta~n r~sulting viscosity figures o~ M3 10-30.000 or 3cre, t~i~ b-ing ~nheard ~n connec~ion wit~ conYentional ~u~s~on concrete and v~sy o~p~nsively a d ieva~le in ot~ ~ t~onal asphalt prepar~tion.
. ~h- ~ppl$-~ ;Yin~ plant can be a ~imple ~atc~ -m~x r or a continuous t~roughflow ~xc~, ~ut it ~ould be pos~ble tD u~e ~opasat~ ~ix ~ ~or ~- ~vi~ o~ the S-gp-Ct~Y b~nding ~gent into the rospect~Ye stone Ssactions ~nd a ~ep~rate mixer ~or the bzinging togcther oS tha thu~ pret~eat~d ~r~ctions.
Wben prepa~ing thc c3ulsion conc~ete it will ~e ~dv~ntageous to control ~ ~r~ g o~ the 'k~zd~
~n~ls$on such that ~t ~ill br~ak ~ 500n as a pract~ally total ~sapping Or the coz~se sto~es ~as taken pl~c~, ~.g. a~tss ~ ~ixing ~i~e cS 10-~2 scc~d~, :
WO 93/0929~ PCr/DK92~
7 2~22~97 ~ch ~t t~is ~lsion ~ill nct ~t t~e to ' diluted ' ~ e ss~s~guen~ly a~de~ ' s~ft~
as added in con~ection w~ e 2d~iSio~ o~ t~e ~i~e stone Sr~ction. 52~e~y ~e ha~d e~lsicn ca~ be dosed ~ ~C-~dZlnC~ Wit~ U~Q des~ad ~axi~ ca~y~ng capacisy o~ sto~cs o~ coa~se ~r?c~on, w~ile a dil~io~
o~ e emulsion ~ould cau~e a ueaX~ning o~ ~his casrying ~apac~ty and t~Le~y o~ possibility oS an e~icien~
xploitation o~ the hish v~scid bit~en.
Anoth i3p~:tant e~ect of the rapid addition o~
the ~i~e stone f:~c~ion as soon as the hard e~ulsion bas kcen d~stributed and broXen is that by thi ~ddi~on ~n ~d~anc-d adh-sion bet~een the stone~ o~ ~he coarsa ~raction ~ill be pr~vent2d, which could othe~~ise ~i~e rise to undes~d lu~p l~or::~ations. ~:n practic~ it is correspondingly ~mpo~tant ~hat the b~eikins o~ the added ~soft' c lsion taXes place no late- than by the Sini h~ng and d~l~vesing o~ the material mixtur~ ~r~m th~ n~x~ng plant, ~n ~rder to the~e~y co~nte-acin~ lat-s pro~lQ~s with respect to ~ashing out oS the ~ulsion a~t~r t~e layins out oS ~hQ mats:ial or alr~ady ~ur~g ; the t~ans~cr~atio~ the~eoS to the worXin~ plac~. ~t is i, less i~portan~ whethe~ the so~t emulsion is added ¦! ~r~e~ly b-~or-, concurrcqtly w~th, or ~iefly ~ftar t~
add~t~on of the ~ine stone Sraction.
It is ess~Rtial to notica that th~ very cont_oll~ng oS the~ ~r-ak~ng ti~ oS thQ appl~Qd Q~UlSions belongs to ~ oa~y well e~tabl~sh~d ~rt, such that th~s will not ha~e to be Surth r luc~datad ~ thQ prosent connect~on.
In conn-ction with the invention ~t will ~e po3~ible to pret~eat tha coars~ stone ~raction with the cmulsi~n conta~nin5 the hish ~iscid ~itumen, while by thR addition o~ the ~ine stonQ frac~on the~- is ~ot us~ ~ny onuls~n, k~t a ~itumeno~s b~n~Dg agent ha~n~
a gu~t~ low ~isc~sity, e.g ~3 ~500-2000 ~t 6~Q C.
Sh ~ dditive ~2y ~e ad~inestered ~n c~ld conditicn, wo 93/0929s pcr/DKs2~oo3l~
, 8 2122~97 and it ~ rander the ~aterial wcll shapea~le. 'n ~o Sas as t~e ~gration w~ sl-~d 2~ ~ n u~
ta~ pl~ac~ sacn -rte~ t~e laying out, a desi~a~l~ rs~sult ~ c ac~e~l- als~ i5 ~llanne~, even whe3~ the res~ t~en pe~C~1:a5Q 0~ ~3a s~at~rial ~y ~
~till ~gher ~y t~c ~:se o:! t~e 'soft' asn~lsio~ or t~e f~n~ stone fsaction.
~roaft~r a f~w examples oS dis~Qnsaries ac~r~ins ~o th~ $n~ention should ~Q giYQn:
Exa~ple 1:
1-- .
- Ston~ ~at ~al: 60 ~ei~ht percsnt oS 4-16 ~ coarse Sraction;
40~CS w~ght pe~cont oS 0-4 mc fine frac~ion~
Binding ase~t emulsion: 5ype ~: BE5~/20.000 Typ- 2: BE65M~ .000.
~ n tho~ d<nc~inations, "~ tands Sor "~it~men e3~1sion", n 65 n Sor thQ admixt~ry pe~contage o~ the bitu~en, ~R" ~or a rapidly breaking ~15ion, ~ Sor a ~ediu3 breaXing ~ulsion , and t.~e ~igur- indication~
20.000 an~ 3.000 Sor t~e YCscosity oS t~e r~spec~i~e l~ . bitu3QDs, rcasu~-d by ~r~/s~c. at 60 C.
; ~y ~p ~en~ ~t ~g st~blish~d that ~he breaXing t~oe ~or the c~ul~$on tyFs on the c~ar3e Srac~ion typc o~ ~ton-s ~ 8 c~rta~n ~oun~ d ~econd~, c.g. 12-14 second~.,5he ~oass- S~action is lntro~uc~t c 8 ntly and u~hout h-at~ng.~nto a Slow-~hrough ~;~er, ,at the ent~nc~ ~t o~ which the o~U~cion d the said type 1 is ~dded ky a Slo~ csrresponding to a weight a~ount oS ~-8 ~C~ o~ t~e stone w i~t. In the ~ixer the aSueou~
~o~u~$on o~ the ~uls$on ~111 be d~st ikuted e~nly aroun~ th~ 8tones ~n ~c~ scc~nds. A~ a follow~ng plac~
c~ the ~xer, c~rr~spond~ng to a ~atzrial ~sans~rtati~n t~e o~ 14-16 s-conds, a Slou oS the Slne stone Sract~on .
wo 93/09295 pcrlDg92~oo3l~
" , ~ .
9 21~97 ~ ~
~d ~uls~on ty~e 2 at ~ Ye~ght ratio o~ so~e ~.Oo~
added. !~he total product is eonvey~d ~u~es ~n ~IQ
er ~or ~ ve ~x~ng t~ ugh a~d~t~on~l 2~-30 ~eco~! c~s~ading ~pprox~at-ly ~o ~e bre~dng t~ o~ dsion typ~ 2, s~es~ter t~e ~r- ~e let o~t ~n a SloY to a ca~ h4 t~W3C taXe~
th~ c~llect~d mat ~al port~cn to a deli~csy appasat~s at t~e YcrXing s~t~, where thc lay~ng out ~s ~e~t-d not lat~r th~n 4_c ~cur5 ~t~r thQ ~r~pa~at~on o~ the ~t~r~ xt~r-. ~n the ~aid out c~ulsion c~nc~t-t~ e ~*~1 bc a res~dual bitu~en perc~ntage o~
S ~ v~ t~y S.
Ex~ple 2:
Stone matesi~1: 60 weight p~rc-nt o~ 5-18 mm coarse Sraction 40 ~e~ght pesc~nt o~ 0-S mm ~in~ Srac io~.
.
~ind~ng a~n~: $ype S: B 180 .
. ln t:~ s~ denominations nB" st:ands or a pure or non-~nulgat~d b~t~mon, ~le the Siguse 80 r~fs to a ~~atsat$on o2 180 at 2~ C, cor~spond~g to a ~cos~;y oS ~ome 60.000 D~2/~ec at 60 C. ~B
S.OOO ~o~ on~ulgated betu~en ha~ng a q~co~ty o~ ~.000 ~ZI~c at 60 C.
~800 ~ stones o~ th- coas~ Ssact~on ~eated to ~ 130~ C ~ ~ll~d ~nt~ a c~arge mixer, and aSl: ~t: OS ~Q ~ v~ ~0 X~;~ b~g age~t typq ', hc~tc~ to ~coe 130 C ~5 added. 8~ conds t~r~Stas 12~0 Xg o~ the ~ mc ~ac ion is added, this ~r~ctlon not h~ng to ~ h~at&d, and al30 60 X~ ~d~ng ~ge~t type 2, he~t~d to roughly 9C~ C~ When the WO 93/09295 P~/DK92/0031~ i 10 2~22~97 ~i~C~Q Fo~t~on oS' a~out 3 'cons has bq~n ho~og~ously .g. ~2~es 25 s~utnds~ o c~ go ~ 1~ out t.~ a ca~er ~uc3c, and care ~s t~c~ aQ ~iX~ ~
t ~ore tl~ 6 ho~s ~S~ on.
~c ~ t~~tt~e ~ t2~c ~xer can ~e ~o~e 60~ C.
., ,, . ~, :
Claims (5)
1. A method of preparing an emulsion or asphalt concrete to be laid out as a road material, whereby a coarse stone fraction in a mixing plant is mixed with a binding agent constituted by a bitumen emulsion or a heated bitumen, whereafter a finer stone fraction and additional binder agent are added for further mixing, whereafter the material is brought to the laying area, characterized in that for the binding agent of the coarse fraction there is used bitumen or bitumen emulsion based on a bitumen having a noticeably higher viscosity figure than the bitumen which constitutes or in emulgated form is present in the said additional binding agent.
2. A method according to claim 1, characterized in that the high viscid bitumen is applied as an emulsion which is prepared so as to break not later than by the addition of the additional binding agent or the finer stone fraction, respectively.
3. A method according to claim 1, characterized in that the additional binding agent is added as an emulsion that is prepared so as to break before the laying out of the material and preferably before the material leaves the mixing plant.
4. A method according to claim 1, characterized in that for the binding agent of the coarse fraction use is made of a bitumen having a viscosity substantially higher than 3.000 mm2/sec at 60° C.
5. A method according to claim 2, characterized in that the additional binding agent is applied as a non-emulgated bitumen with such a low viscosity that the resulting mixture remains shapeable in cold condition until after the laying out it is stabilized by migration of the high viscid and the low viscid bitumen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK1793/91 | 1991-10-30 | ||
| DK911793A DK179391D0 (en) | 1991-10-30 | 1991-10-30 | PROCEDURE FOR MANUFACTURING EMULSION CONCRETE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2122497A1 true CA2122497A1 (en) | 1993-05-13 |
Family
ID=8108092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002122497A Abandoned CA2122497A1 (en) | 1991-10-30 | 1992-10-30 | A method of preparing an emulsion- or asphalt-concrete for use as a road material |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0624214B1 (en) |
| AT (1) | ATE176286T1 (en) |
| AU (1) | AU2902692A (en) |
| CA (1) | CA2122497A1 (en) |
| DE (1) | DE69228321T2 (en) |
| DK (2) | DK179391D0 (en) |
| ES (1) | ES2129459T3 (en) |
| FI (1) | FI941957A0 (en) |
| GR (1) | GR3030054T3 (en) |
| NO (1) | NO305567B1 (en) |
| WO (1) | WO1993009295A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2695664B1 (en) * | 1992-09-14 | 1994-10-14 | Ceca Sa | Process for the preparation of storable cold asphalt mixes which can be stored and corresponding bituminous emulsion. |
| DK60095A (en) * | 1995-05-24 | 1996-11-25 | Vejtek Int As | Process for cold production of asphalt materials for cold laying of the same |
| FR2743095B1 (en) * | 1995-12-28 | 1998-03-20 | Colas Sa | PROCESS FOR COLD BITUMINOUS DENSITY COATINGS AND DEVICE FOR CARRYING OUT SAID METHOD |
| DE202010017924U1 (en) * | 2010-12-06 | 2013-03-26 | Joachim Eberhardt | For asphalt installation suitable asphalt building material |
| NO339255B1 (en) | 2013-05-22 | 2016-11-21 | Multivector As | Apparatus for swirling at least one fragmented substance |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB334588A (en) * | 1929-06-06 | 1930-09-08 | Edwin Corby Wallace | Improvements relating to bituminous paving compositions and methods of making same |
| DE3265423D1 (en) * | 1981-08-25 | 1985-09-19 | Karl Gunnar Ohlson | Method and apparatus for making asphalt concrete |
| NO157510C (en) * | 1985-11-29 | 1988-03-30 | Nodest Vei As | PROCEDURE AND APPARATUS FOR MIXING GRAND MATERIALS AND THE BITUM. |
| FR2623219B1 (en) * | 1987-11-17 | 1990-04-06 | Maheas Rene | METHOD FOR COLD MANUFACTURING STOCKABLE BITUMINOUS DENSITY COATINGS |
| DE69014306T2 (en) * | 1990-12-19 | 1995-04-13 | Nynaes Petroleum Ab | Two-component composition containing a bitumen emulsion and a precipitant, process for their preparation and use thereof. |
-
1991
- 1991-10-30 DK DK911793A patent/DK179391D0/en not_active Application Discontinuation
-
1992
- 1992-10-30 DE DE69228321T patent/DE69228321T2/en not_active Expired - Fee Related
- 1992-10-30 DK DK92922931T patent/DK0624214T3/en active
- 1992-10-30 CA CA002122497A patent/CA2122497A1/en not_active Abandoned
- 1992-10-30 AT AT92922931T patent/ATE176286T1/en active
- 1992-10-30 AU AU29026/92A patent/AU2902692A/en not_active Abandoned
- 1992-10-30 WO PCT/DK1992/000315 patent/WO1993009295A1/en active IP Right Grant
- 1992-10-30 ES ES92922931T patent/ES2129459T3/en not_active Expired - Lifetime
- 1992-10-30 EP EP92922931A patent/EP0624214B1/en not_active Expired - Lifetime
-
1994
- 1994-04-27 NO NO941545A patent/NO305567B1/en not_active IP Right Cessation
- 1994-04-28 FI FI941957A patent/FI941957A0/en unknown
-
1999
- 1999-04-26 GR GR990401134T patent/GR3030054T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE69228321D1 (en) | 1999-03-11 |
| DK179391D0 (en) | 1991-10-30 |
| DE69228321T2 (en) | 1999-09-23 |
| FI941957A (en) | 1994-04-28 |
| NO941545D0 (en) | 1994-04-27 |
| NO305567B1 (en) | 1999-06-21 |
| ATE176286T1 (en) | 1999-02-15 |
| NO941545L (en) | 1994-04-27 |
| AU2902692A (en) | 1993-06-07 |
| WO1993009295A1 (en) | 1993-05-13 |
| FI941957A0 (en) | 1994-04-28 |
| GR3030054T3 (en) | 1999-07-30 |
| DK0624214T3 (en) | 1999-09-13 |
| EP0624214B1 (en) | 1999-01-27 |
| ES2129459T3 (en) | 1999-06-16 |
| EP0624214A1 (en) | 1994-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |