Yini i-Concrete Accelerator

Ekwakhiweni kobunjiniyela bomhubhe wesimanje, i-shotcrete iyisiqinisekiso esibalulekile sokuqinisekisa isivinini sokwakha, futhi i-ejenti esheshayo iwukhiye wobuchwepheshe be-shotcrete. I-accelerator Concrete iyinhlanganisela engenza ukhonkolo usethe futhi uqine ngokushesha.Izinhlobo eziyinhloko usawoti we-inorganic kanye nezinto eziphilayo.Powdery solid, umthamo wayo ubalwa kuphela 2% ~ 3% kokuqukethwe usimende kukhonki, kodwa angenza ukhonkolo esimisweni sokuqala esiyimizuzu emi-5, i-accelerator ye-concrete ngaphakathi kwe-12min setting. Ukuze ufeze inhloso yokulungisa izimo eziphuthumayo noma ukubeka ukhonkolo ngokushesha ku-shaft.Kuyisithasiselo esidingekayo endleleni yokwakha i-shotcrete.Umsebenzi wabo ukusheshisa ukugeleza nokuqina kukasimende., ukwakha amandla anele ngesikhathi esifushane kakhulu ukuze kuqinisekiswe izidingo ezikhethekile zokwakha.

Izigaba eziyinhloko:

1. I-Hydroxide ye-alkali yomhlaba yensimbi ye-carbonate ne-alkali yomhlaba yensimbi

I-powdery alkaline earth metal carbonates noma ama-hydroxides ayengavamile ukusetshenziswa ekwakhiweni kwe-shotcrete ngaphambili.Ama-accelerator asetshenziswa kakhulu alolu hlobo lukakhonkolo., ngomthamo ojwayelekile we 2.5% ku 6% yesisindo sikasimende. Ngokuyinhloko bakhuthaza ukugeleza kwe-C3S.Ngokujwayelekile engeza inani elincane le-aluminium carbonate, kungathinta isikhathi sokubeka usimende.Nokho, imiphumela ingabonwa kuphela lapho imithamo emikhulu yengezwa.Ukusabela phakathi kwe-accelerator nosimende kuthinteka kakhulu ukwakheka kwamakhemikhali usimende., ubuhle, izithasiselo zamaminerali kanye nezinga lokushisa elizungezile.

2. I-alkali silicate, i-sodium silicate, potassium silicate uhlobo accelerator

Isetshenziselwa kakhulu ukuxuba i-shotcrete emanzi, ngokuvamile ziwuketshezi, kanye nenani elikhulu lokuxuba (>10% isisindo sempahla kasimende).I-silicate encibilikayo iyancibilika ngenxa yokusabela ukwenza i-calcium silicate.Uma isetshenziswa kumithamo emikhulu, lawa ma-coagulants anciphisa amandla okunamathela ngesisekelo, futhi ekugcineni, kuholela ekwehleni kwamandla kakhonkolo kanye nokuncipha okunzima okomile.Ngenxa yalezi zizathu, umthamo omkhulu walesi sisheshisi aweqi 15%, futhi ukulahlekelwa amandla ekugcineni kukhawulelwe kokungaphansi 30%.

3. I-sodium aluminate, i-potassium aluminate, i-accelerator ye-aluminate ukhonkolo

Ingasebenzisa imiksi eyomile kakade, ungasebenzisa iphrojekthi ye-wet mix shotcrete futhi, evame ukusetshenziswa umthamo kuyinto 2.5% ~ 5.5% ngokuvamile.I-Potassium aluminate inomphumela ongcono kune-sodium aluminate, kodwa futhi kubiza ngaphezulu.Ikakhulukazi ibambe iqhaza ngqo ekufakweni kwamanzi kukasimende wasePortland futhi kusheshiswe ukumiswa kukasimende., ukubopha nge-gypsum, ukuvimbela ukwakheka kwe-ettringite ebusweni bezinhlayiya ze-cement, nokwenza i-C3A isabele ngokushesha, ukukhiqiza amandla okuqala adingekayo ku-shotcrete eminingi.Imiphumela yabo ivame ukuthonywa ukwakheka kwamakhemikhali, ukucoleka kukasimende kanye nezithako zamaminerali ezikuwo, kodwa lo mphumela mncane kunalowo obonwa ngezithasiselo ze-carbonate.Amandla okugcina azolahleka yi 20% kuya ku-25%.Akungabazeki ukuthi i-aaluminate esheshisa i-ejenti inomphumela omuhle kakhulu wokufaka isicelo kunjiniyela we-shotcrete wokuxutshwa okumanzi futhi inomphumela omuhle wokwakha ebhodini eliwugqinsi ngisho nasebhodini lophahla., okuqukethwe kwayo kwe-alkali ephezulu kanye nobungozi empilweni ebangelwa ukwakhiwa ngaphansi komhlaba yizici eziyinhloko ezikhawulela ukusetshenziswa kwayo.Ngaphezu kwalokho, kunezinkinga ezithile ekusetshenzisweni kobunjiniyela be-sulfuric acid ne-aggregate esebenzayo, lokhu kwakamuva kungase kwenzeke ukusabela kwe-alkali aggregate.

4. I-alkali yamahhala ye-accelerator ye-liquid concrete

I-alkali ewuketshezi – i-accelerator yamahhala, ukusetshenziswa kwayo akubanzi kakhulu.Lolu hlobo lwe-coagulant lungaxazulula izinkinga ezijwayelekile zesisheshisi se-alkali., njengokulimala kwendawo yokwakha ngaphansi komhlaba, ukulimala kwe-alkali aggregate reaction, ukulimala kwenani le-pH ephezulu ekusetshenzisweni kanye nokulahlekelwa amandla aphuzile we-shotcrete.

I-Cie-China.org ingumhlinzeki oholayo wezithasiselo zikakhonkolo wegwebu ohlinzeka nge-ejenti yokugwedla ukhonkolo, superplasticizer,isithuthukisi samandla kakhonkolo wegwebu kukhonkolo ongasindi, Amabhulokhi e-CLC. Uma ufuna superplasticizer, sicela ukhululeke Xhumana nathi.