Jun 15, 2014
Shotcrete na fɔ absɔpshɔn ɛnaji, nɔto fɔ kɔmprɛsiv trɛnk. Dat wan difrɛns de ɛksplen wetin mek tanɛl wok de yuz shɔt fayv, ay doz ɛn glu bɔndɛl.
Praymari tanɛl sɔpɔt de fala difrɛn lɔjik frɔm sɔfayz strɔkchɔ dɛn. We di grɔn defɔm, di layt we dɛn sprɛy fɔ difɔm wit am pas fɔ spall wantɛm wantɛm, so di dizayn paramita na aw bɔku ɛnaji di layt de absɔb pan wan givɛn diflɛkshɔn. Yuropian prɔsis de spɛsifa rɛsɛdyual trɛnk ɔ ɛnaji absɔpshɔn wit tɛst to EN 14488-3; Nɔt Amɛrika prɛktis kin wok wit flekshɔnal tafnɛs. Dis na di say we stɛl fayv kin gɛt in ples: plein shotkrit kin lɔs kapasiti di tɛm we i krak, we layt we dɛn dɔn riinfɔs fayv kin kip bɔku pat pan in kapasiti afta i krak, we kin bay tɛm fɔ kɔmɔt ɛn fɔ ad sɔpɔt.
Ribaund na di hiden kɔst sɛnta fɔ shotkrit. di mεtirial we nכ stik de fכl bak, εn plein shotkrit tipikli de ribaund 15% to 25%; fayv de inkrεs am sכmtεm biכs di fayv dεm de bכns na di nכz. di lεngth na di mכst sεnsitiv vεriεbul: 30 mm fayba de ribaund notis mכr dan 20 mm. Na dat mek tanɛl wok ɔlmost nɔ de yuz 50 ɔ 60 mm fayv, pan ɔl we lɔng fayv ankɔ dɛn bɛtɛ insay tiori. di prεktikal kכmprכmis na 20 to 30 mm wit dayamita nia 0.55 mm, so di fayv de fala di ay strim insay di sכfa.
Wet miks de ristrikt fayv lɔng pas dray miks. Di wet matirial de pɔmp tru wan layn, so lɔng fayv brij ɛn blɔk dɛn na bɛnd; na di noz i fɔ skata bay kɔmprɛsd ɛya. 20 to 30 mm fit mכst wet-miks rכbכt dεm, wit 0.5 to 0.75 mm dayamita, we de gi aspek rεshכn we de 40 to 55. If di spεsifi k εnεji absכpshכn hכy, di kכrekt rispכns na mכr dכz, nכto fכ lכng fayv: fכ rayz 30 to 45 kg/m3 de lif enεji absכpshכn bay ova 40% we ribaund de rayz כnli tu כ tri pasɛnt poɛnt.
di tכnel shotkrit dכz kin fכl bitwin 25 εn 45 kg/m3. Di 25 to 30 rɛnj de kɔba lɛvul layers biɛn gud rɔk; 35 to 45 de kɔba fɔlt zon, shalɔ kɔva ɛn big difɔmeshɔn sɛkshɔn dɛn. abov 45 kg/m3 wokabiliti de dכp visiblely εn di כpεrayt instinktli ad wata, we de kכt trεnk dairekt wan. Dat na di rial rizin we mek bɔku sayt dɛn kin ripɔt se dɛn gɛt di rayt doz bɔt dɛn nɔ gɛt bɛtɛ trɛnk. Di ay doz fɔ pe wit wata-ridyus ɛn viskɔsiti-modifying admixtures, ɛn wan slump ɛn kɔhyeshɔn chɛk bifo dɛn sprɛy.
Fayba bɔl we de na di layt wɔs pas we i nɔ gɛt yus: i de mek wan ples we nɔ gɛt natin ɛn wik plen we kin bi krak stata we di grɔn de muf. di bכlכ gεt tri tin dεm: fכ fכd di fayv bay di anful insay di miksa, di miks tεm we i nכ de miks, εn di aspek rεshכ we pasmak. Fayba fɔ sprinkl ɔ fiba bay wan dediket dos mashin, ɛn miks fɔ ɛkstɛnd fɔ 30 to 60 sɛkɔn oba klin kɔnkrit. di fayv bכndεl dεm we dεn glu dεn de ridyus di risk bכku: dεn de fכd di rכw as wan yunit, di glu we de sכlv wit wata de sכlv, εn εvri fayv de separet wan wan, we de impruv di yunifכmiti bay mכr dan 40% oba di fayba we lכs. Na dat mek wet-miks rɔbɔt dɛn lɛk bɔndɛl dɛn we dɛn glu.
Stilin fayba nɔ de tek ples fɔ stɛl arch dɛn. insay grכn klas IV εn V di arch de sכpכt gכlכl stiffnεs we di fayv de sכpכt tכf to di layεr insεf; dɛn kin du difrɛn wok dɛn. di fayv kin, bכt, riples di mεsh insay di layεr, i kin pul di hang, tay εn posishכn leba εn i kin pul di vכyd dεm bihayn di mεsh. Di kɔmɔn kɔmbayn na di sayt na stɛl arch plus fayv-rɛinfɔs shotkrit we nɔ gɛt mɛsh. I de pe mɔ pan chenj profayl, usay mɛsh nɔ kin ebul fɔ fala wan irɛgyula rɔk fes bɔt fayv kɔnkrit kin fala.
Ribaund na di mɔs dairekt kɔst indikɛtɔ na tanɛl shotkrit, ɛn in fɔs vɛriɔbul nɔto di fayv bɔt na di prɔses. Insay wet miks di matirial dɔn ɔlrɛdi ful-ɔp we dɛn de pɔmp ɛn dɛn ad di aksilarayt na di noz, so bɔku pan di lɔmp dɛn na lay lay bɔl dɛn we dɛn kin ol togɛda wit paste we kin brok we dɛn de flay. Dray miks na di rivays: dεn ad wata na di noz, di haydreshכn nכ de ivin, εn fayv de kכmכt fכ tru tru bכl dεm na di hos wכl εn na di bεnd dεm, εn wan pan dεn wan dεm we de rich na di krawn de lεf wan void. Pik di prɔses frɔm sɛkshɔn ɛn tik. fכ wan pεrmanεnt layn we de 20 to 30 mm pan wan pas, wet miks de gi visibly bεtε tiknes yunifכmiti; fכ tεmporari sכpכt, imejensi ripa εn abrupt sεkshכn chenj, dray miks de adap bεtεh εn aksept hכy ribaund. Wet miks de kɛr tri ditel dɛn. Fayba lɔng nɔ fɔ pas wan pat pan tri pat pan di hos bore, so 50 mm fayba insay 65 mm hos go blok. di aksilarayt doz de fala di siep na di rɔk fes, tumɔs de mek i brit layt ɛn tu smɔl de mek i sag, ɛn ɛni we di fayv de stɔp fɔ wok. Kip di noz 1 to 1.5 m frɔm di sɔfa ɛn sprɛy pɔrpindikul; angled spray de alayns di fayv dεm wit di ay strim εn i de mek wan anisotropik wik plen. Enaji absɔpshɔn na di panɛl tɛst na EN 14488-3, ɛn akseptɛns na di eria ɔnda di lod-diflɛshɔn kɔv pas wan singl pik valyu, we di kɔntrakt fɔ tɔk klia wan.
akseptans fכ shotkrit fayba de luk pan tri tin dεm: dכz, distribushכn yunifכmiti εn flekshכnal tכf. dεn de chεk di doz bay we dεn was wan sayt sεmpl εn wej, insay plus כ mayns 10%; yunifom bay we yu de kɔr ɛn inspɛkt di fes we dɛn kɔt, we fɔ sho se fayv spred ivin wit nɔ pat dɛn we nɔ gɛt fayv; tafnɛs bay di bim tɛst we dɛn gi di nem na di dizayn. Fɔ di mɔdel, dayamita, lɔng ɛn di doz we dɛn kin rɛkɔmɛnd, di tanɛl ɛn mayning sɛkshɔn na di stɛl fayba prodak pej de sho di gred ɛn doz we de mach, we dɛn kin ataya dairekt as tɛknikal aneks.
Tɛl wi yu prɔjek sɛnɛriɔ ɛn wetin yu nid, ɛn wi go mach di rayt sɔlvishɔn ɛn gi wi kot insay 24 awa.
Gɛt wan Fri KɔtKɔpa-plet maykrowayr, kol drɔ huk ɛnd tayp, glu in row, grɔn tayp, 304 / 310S / 446 stenlɛs stiɛl ɛn mɛlt-drɔ ɔt-rɛsistant fayba, UHPC spɛshal sintetik fayba, dayamita 0.2 to 1.0 mm, lɔng 6 to 60 mm, tɛnsiɛl trɛnk 700 to 2850 MPa, kɔntinyu kכvεreshכn 0.5% to 2% volyum rεt εn 30 to 268 kg/m3. Dɛn kin ɔganayz di prodakshɔn akɔdin to ASTM A820 ɔ EN 14889-1 ɛn dɛn kin gi batch inspekshɔn ripɔt. Tri kayn pak dɛn de sɔpɔt: katon, tɔn bag ɛn bɔlk. Tred tɛm dɛn na opshɔnal EXW / FOB / CIF / DDP.
Lan bɔt stɛl fayba sɛlɛkshɔn ɛn kot →