Isiphumo se-hydroxyethyl cellulose ether ekufakweni kwamanzi kwangaphambili kwesamente ye-CSA

Iziphumo zei-hydroxyethyl cellulose (HEC)kunye ne-substitution ephezulu okanye ephantsi ye-hydroxyethyl methyl cellulose (H HMEC, L HEMC) kwinkqubo yokuqala ye-hydration kunye nemveliso ye-hydration ye-samente ye-sulfoaluminate (CSA) yafundwa. Iziphumo zibonise ukuba imixholo eyahlukeneyo ye-L-HEMC inokukhuthaza ukuhanjiswa kwe-samente ye-CSA kwi-45.0 min ~ 10.0 h. Zonke ezintathu ze-cellulose ethers zilibazise ukuchithwa kwe-cement dissolution kunye nesigaba sokuguqulwa kwe-CSA kuqala, kwaye emva koko zakhuthaza ukuhanjiswa ngaphakathi kwe-2.0 ~ 10.0 h. Ukuqaliswa kweqela le-methyl liphucule impembelelo yokukhuthaza i-hydroxyethyl cellulose ether kwi-hydration ye-CSA cement, kwaye i-L HEMC yayinempembelelo enamandla kakhulu yokukhuthaza; Umphumo we-cellulose ether kunye neendawo ezahlukeneyo kunye needigri zokutshintshwa kwiimveliso ze-hydration ngaphakathi kwe-12.0 h ngaphambi kokuba i-hydration ihluke kakhulu. I-HEMC inempembelelo enamandla yokukhuthaza kwiimveliso ze-hydration kune-HEC. I-L HEMC eguqulelwe kwi-CSA i-cement slurry ivelisa i-calcium-vanadite eninzi kunye ne-aluminium gum kwi-2.0 kunye ne-4.0 h ye-hydration.
Amagama aphambili: isamente yesulfoaluminate; Iselulosi ether; Ibambela; Iqondo lokutshintshwa; Inkqubo yokufakwa kwamanzi; imveliso Hydration

I-Sulfoaluminate (CSA) i-samente ene-anhydrous calcium sulfoaluminate (C4A3) kunye ne-boheme (C2S) njenge-mineral engundoqo ye-clinker ineenzuzo zokuqina ngokukhawuleza kunye namandla okuqala, i-anti-freezing kunye ne-anti-permeability, i-alkalinity ephantsi, kunye nokusetyenziswa kobushushu obuphantsi. inkqubo yokuvelisa, kunye nokusila lula kwe-clinker. Isetyenziswa ngokubanzi ekulungiseni ukukhawuleza, ukuchasana nokungena kunye nezinye iiprojekthi. I-Cellulose ether (CE) isetyenziswa ngokubanzi ekuguqulweni kodaka ngenxa yokugcinwa kwamanzi kunye neempawu zokujiya. I-CSA ye-cement hydration reaction iyinkimbinkimbi, ixesha lokungeniswa lifutshane kakhulu, ixesha lokukhawulezisa linamanqanaba amaninzi, kwaye i-hydration yayo ichaphazeleka kwimpembelelo ye-admixture kunye nokuphilisa ukushisa. UZhang et al. ifumene ukuba i-HEMC inokwandisa ixesha lokungeniswa kwe-hydration ye-CSA yesamente kwaye yenze i-peak ephambili ye-hydration heat release lag. Sun Zhenping et al. yafumanisa ukuba isiphumo sokufunxa samanzi se-HEMC sithintele i-hydration yokuqala ye-cement slurry. Wu Kai et al. wayekholelwa ukuba i-adsorption ebuthakathaka ye-HEMC ebusweni be-samente ye-CSA yayinganelanga ukuchaphazela izinga lokukhululwa kobushushu be-cement hydration. Iziphumo zophando malunga nomphumo we-HEMC kwi-CSA i-cement hydration yayingafani, enokuthi ibangelwa ngamacandelo ahlukeneyo e-cement clinker esetyenzisiweyo. Wan et al. ufumene ukuba ukugcinwa kwamanzi kwe-HEMC kwakungcono kune-hydroxyethyl cellulose (HEC), kunye ne-viscosity eguquguqukayo kunye noxinzelelo lwangaphezulu lwesisombululo somngxuma we-HEMC-modified CSA sement slurry kunye ne-high substitution degree yayinkulu. U-Li Jian et al. ukubeka iliso utshintsho lwangaphakathi lwangaphakathi lwe-HEMC-modified CSA i-cement mortars phantsi kwe-fluidity esisigxina kwaye yafumanisa ukuba impembelelo ye-HEMC enedigri ezahlukeneyo zokutshintshwa.
Nangona kunjalo, uphononongo oluthelekisayo kwimiphumo ye-CE enama-substituents ahlukeneyo kunye ne-degrees of substitution kwi-hydration yokuqala ye-samente ye-CSA ayanele. Kweli phepha, iziphumo ze-hydroxyethyl cellulose ether enezinto ezahlukeneyo, amaqela athatha indawo kunye needigri zokutshintshwa kwi-hydration yokuqala ye-samente ye-CSA yafundwa. Umthetho wokukhutshwa kobushushu be-hydration ye-12h elungisiweyo ye-samente ye-CSA kunye ne-hydroxyethyl cellulose ether yahlalutywa ngokugxininiswayo, kwaye iimveliso ze-hydration zahlalutywa ngokobungakanani.

1. Uvavanyo
1.1 IiMathiriyeli ezikrwada
I-samente yi-42.5 grade fast hardering CSA Cement, ixesha lokuqala kunye nelokugqibela lokumisela yi-28 min kunye ne-50 min, ngokulandelanayo. Ukwakhiwa kweekhemikhali kunye nokwakhiwa kweeminerali (iqhezu lobunzima, umlinganiselo kunye nomlinganiselo wesamente wamanzi okhankanywe kweli phepha yiqhezu lobunzima okanye umlinganiselo wobunzima) isilungiso se-CE sibandakanya i-3 hydroxyethyl cellulose ethers kunye ne-viscosity efanayo: i-Hydroxyethyl cellulose (HEC), iqondo eliphezulu lokuthatha indawo ye-hydroxyethyl i-methyl cellulose (H HEMC), i-degree ephantsi yokutshintshwa kwe-hydroxyethyl methyl fibrin (L HEMC), i-viscosity ye-32, i-37, i-36 Pa · s, i-degree of substitution of 2.5, 1.9, 1.6 yokuxuba amanzi emanzini adibeneyo.
1.2 Umxube womxube
I-Fixed water-cement ratio ye-0.54, umxholo we-L HEMC (umxholo weli nqaku ubalwa ngomgangatho wodaka lwamanzi) wL = 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, HEC kunye Umxholo we-H HEMC we-0.5%. Kweli phepha: L HEMC 0.1 wL=0.1% L HEMC itshintshe i-samente ye-CSA, njalo njalo; I-CSA yisamente yeCSA esulungekileyo; I-HEC elungisiweyo yesamente ye-CSA, i-L HEMC eguqulelwe kwisamente ye-CSA, i-H HEMC eguqulelwe kwisamente ye-CSA ngokulandelelana kubhekiselwa kuyo njenge-HCSA, LHCSA, HHCSA.
1.3 Indlela yokuvavanya
I-micrometer ye-isothermal yamajelo asibhozo kunye noluhlu lokulinganisa lwe-600 mW yasetyenziselwa ukuvavanya ubushushu be-hydration. Ngaphambi kovavanyo, isixhobo sazinziswa kwi (20 ± 2) ℃ kunye nokufuma okuhambelanayo RH = (60 ± 5) % kwi-6.0 ~ 8.0 h. I-CSA i-samente, i-CE kunye nokuxuba amanzi axutywe ngokwe-mix ratio kunye nokuxuba kombane kwenziwa kwi-1min ngesantya se-600 r / min. Ngokukhawuleza ulinganise (10.0±0.1) g slurry kwi-ampoule, faka i-ampoule kwisixhobo kwaye uqalise uvavanyo lwexesha. Ukushisa kwe-hydration kwakuyi-20 ℃, kwaye idatha yarekhodwa rhoqo nge-1min, kwaye uvavanyo lwahlala kude kube yi-12.0h.
Uhlalutyo lwe-Thermogravimetric (TG): I-Cement slurry yalungiselelwa ngokwe-ISO 9597-2008 Cement - Iindlela zokuvavanya - Ukumiselwa kwexesha lokumisela kunye nesandi. Udaka lwesamente oluxubeneyo lwafakwa kumngundo wovavanyo we-20 mm×20 mm×20 mm, kwaye emva kokungcangcazela okungeyomfuneko kangangezihlandlo ezili-10, yabekwa ngaphantsi (20±2) ℃ kunye neRH= (60±5)% yokunyanga. Iisampuli zithathwe kwiminyaka yobudala t = 2.0, 4.0 kunye ne-12.0 h, ngokulandelanayo. Emva kokususa i-surface layer yesampuli (≥1 mm), yaphulwa ibe ngamaqhekeza amancinci kwaye ifakwe kwi-isopropyl alcohol. I-Isopropyl alcohol yatshintshwa yonke i-1d ngeentsuku ezi-7 ezilandelelanayo ukuze kuqinisekiswe ukunqunyanyiswa okupheleleyo kokuphendula kwe-hydration, kwaye yomiswe kwi-40 ℃ kubunzima obuqhubekayo. Ubunzima (i-75 ± 2) iisampulu ze-mg kwi-crucible, fudumeza iisampuli ukusuka kwi-30 ℃ ukuya kwi-1000 ℃ kwinqanaba lobushushu le-20 ℃ / min kwi-nitrogen emoyeni phantsi kwemeko ye-adiabatic. Ukubola kwe-thermal yemveliso ye-CSA ye-cement hydration kwenzeka ikakhulu kwi-50 ~ 550 ℃, kwaye umxholo wamanzi afakwe kwiikhemikhali unokufumaneka ngokubala izinga lokulahleka kobunzima beesampuli ngaphakathi kolu luhlu. I-AFt ilahlekelwe ngamanzi angama-20 ekristale kunye ne-AH3 yalahlekelwa yi-3 crystalline yamanzi ngexesha lokubola kwe-thermal kwi-50-180 ℃. Imixholo yemveliso nganye ye-hydration ingabalwa ngokwe-TG curve.

2. Iziphumo kunye nengxoxo
2.1 Uhlalutyo lwenkqubo yokufakwa kwamanzi
2.1.1 Impembelelo yesiqulatho se-CE kwinkqubo yokufakwa kwamanzi
Ngokwe-hydration kunye ne-exothermic curves yomxholo ohlukeneyo L HEMC eguqulelwe kwi-CSA slurry ye-cement, kukho iincopho ze-4 ze-exothermic kwi-hydration kunye ne-exothermic curves ye-CSA ecocekileyo ye-cement slurry (wL=0%). Inkqubo ye-hydration inokwahlulwa ibe yinqanaba lokuchithwa (0 ~ 15.0min), inqanaba lokuguqulwa (15.0 ~ 45.0min) kunye nenqanaba lokukhawuleza (45.0min) ~ 54.0min), inqanaba lokunciphisa (54.0min ~ 2.0h), inqanaba lokulingana eliguqukayo ( 2.0 ~ 4.0h), inqanaba lokuphinda unyuse isantya (4.0 ~ 5.0h), inqanaba lokuhlaziya (5.0 ~ 10.0h) kunye nenqanaba lokuzinzisa (10.0h~). Kwi-15.0min ngaphambi kwe-hydration, i-cement mineral yachithwa ngokukhawuleza, kunye neyokuqala kunye neyesibini i-hydration exothermic peaks kule nqanaba kunye ne-15.0-45.0 min ihambelana nokubunjwa kwesigaba se-metastable AFt kunye nokuguqulwa kwayo kwi-monosulfide calcium aluminate hydrate (AFm), ngokulandelanayo. Incopho yesithathu ye-exothermal kwi-54.0min ye-hydration yayisetyenziselwa ukwahlula i-hydration acceleration and deceleration stages, kunye nemilinganiselo yokuvelisa i-AFt kunye ne-AH3 ithatha oku njengendawo yokuguquguquka, ukusuka kwi-boom ukuya ekunciphiseni, kwaye emva koko yangena kwi-equilibrium ye-dynamic stage ehlala i-2.0 h. . Xa i-hydration yayiyi-4.0h, i-hydration iphinde yangena kwinqanaba lokukhawuleza, i-C4A3 i-dissolution ngokukhawuleza kunye nesizukulwana seemveliso ze-hydration, kwaye kwi-5.0h, kwavela incopho yobushushu be-hydration exothermic, kwaye yangena kwinqanaba lokunciphisa kwakhona. I-Hydration izinzile emva kwe-10.0h.
Impembelelo yomxholo we-L HEMC kwi-CSA cement hydration dissolutionkunye nenqanaba lokuguqulwa lihluke: xa umxholo we-L HEMC uphantsi, i-L HEMC iguqulelwe i-CSA i-samente inamathisele i-peak yesibini yokukhutshwa kobushushu be-hydration ibonakala kancinane ngaphambili, izinga lokukhutshwa kobushushu kunye nexabiso lokukhutshwa kobushushu liphezulu kakhulu kune-CSA ecocekileyo ye-cement paste; Ngokunyuka komxholo we-L HEMC, izinga lokukhululwa kobushushu be-L HEMC liguqule i-CSA i-samente slurry yancipha ngokuthe ngcembe, kwaye iphantsi kune-CSA ecocekileyo ye-cement slurry. Inani leencopho ze-exothermic kwi-hydration exothermic curve ye-L HEMC 0.1 iyafana naleyo ye-samente ecocekileyo ye-CSA, kodwa i-3rd kunye ne-4 ye-hydration exothermic peaks iqhubela phambili kwi-42.0min kunye ne-2.3h, ngokulandelanayo, kwaye ithelekiswa ne-33.5 kunye ne-9.0. mW/g ye-samente ecocekileyo ye-CSA yokunamathisela, iincopho zabo ze-exothermic zonyuka ukuya kwi-36.9 kunye ne-10.5 mW / g, ngokulandelanayo. Oku kubonisa ukuba i-0.1% L HEMC ikhawuleza kwaye iphucula i-hydration ye-L HEMC eguqulelwe i-samente ye-CSA kwinqanaba elihambelanayo. Kwaye umxholo we-L HEMC ngu-0.2% ~ 0.5%, i-L HEMC iguqule i-CSA ukukhawulezisa i-samente kunye nenqanaba lokunciphisa ngokuthe ngcembe lidityaniswe, oko kukuthi, i-peak yesine ye-exothermic kwangaphambili kwaye idibaniswe nenqanaba lesithathu le-exothermic, umbindi we-balance balance level ayisabonakali. , L HEMC kwi-CSA i-cement hydration promotion effect ibaluleke kakhulu.
I-L HEMC ikhuthaze kakhulu ukuhanjiswa kwe-samente ye-CSA kwi-45.0 min ~ 10.0 h. Kwi-45.0min ~ 5.0h, i-0.1% L i-HEMC inempembelelo encinci kwi-hydration ye-samente ye-CSA, kodwa xa umxholo we-L HEMC ukhula kwi-0.2% ~ 0.5%, umphumo awubalulekanga. Oku kwahluke ngokupheleleyo kwimpembelelo ye-CE kwi-hydration ye-samente yasePortland. Uphononongo loncwadi lubonise ukuba i-CE equlethe inani elikhulu lamaqela e-hydroxyl kwi-molecule iya kubhengezwa kumphezulu wamasuntswana e-samente kunye neemveliso ze-hydration ngenxa yokusebenzisana kwe-asidi-base, ngaloo ndlela ilibazisa ukuhanjiswa kwangaphambili kwesamente yasePortland, kunye nokuqiniswa kwe-adsorption, kokukhona kubonakala kulibaziseka. Nangona kunjalo, kwafunyaniswa kuncwadi ukuba umthamo we-adsorption we-CE kumphezulu we-AFt wawubuthathaka kunalowo we-calcium silicate hydrate (C-S‑H) gel, Ca (OH) 2 kunye ne-calcium aluminate hydrate surface, ngelixa amandla e-adsorption I-HEMC kumasuntswana e-samente ye-CSA nayo yayibuthathaka kunaleyo kumasuntswana esamente asePortland. Ukongeza, i-athomu yeoksijini kwimolekyuli ye-CE inokulungisa amanzi asimahla ngendlela ye-hydrogen bond njengamanzi adsorbed, itshintshe imeko yamanzi anokuba ngumphunga kudaka lwesamente, emva koko ichaphazele i-samente hydration. Nangona kunjalo, i-adsorption ebuthathaka kunye nokufunxwa kwamanzi kwe-CE kuya kuba buthathaka ngokuthe ngcembe kunye nokwandiswa kwexesha le-hydration. Emva kwexesha elithile, amanzi e-adsorbed aya kukhutshwa kwaye aphendule ngokuqhubekayo kunye neengqungquthela zesamente ezingenamanzi. Ngapha koko, isiphumo se-CE sinokubonelela ngendawo ende yeemveliso ze-hydration. Oku kunokuba isizathu sokuba i-L HEMC ikhuthaze i-CSA i-cement hydration emva kwe-45.0 min hydration.
2.1.2 Impembelelo ye-CE substituent kunye nesidanga sayo kwinkqubo yokufakwa kwamanzi
Inokubonwa kwi-hydration yokukhutshwa kobushushu kwigophe ezintathu ze-CE ezilungisiweyo ze-CSA slurries. Xa kuthelekiswa ne-L HEMC, i-hydration heat release curves ye-HEC kunye ne-H HEMC eguqulelwe kwi-slurries ye-CSA nayo ineencopho ezine zokukhutshwa kobushushu be-hydration. Zonke ezi zintathu ze-CE zineempembelelo zokulibaziseka kwizigaba zokuchithwa kunye nokuguqulwa kwe-CSA i-cement hydration, kwaye i-HEC kunye ne-H HEMC zineempembelelo ezinamandla zokulibaziseka, ukulibazisa ukuvela kwesigaba esikhawulezayo se-hydration. Ukongezwa kwe-HEC kunye ne-H-HEMC ilibazise kancinci i-3rd hydration exothermic peak, iqhubela phambili kakhulu i-4th hydration exothermic peak, kwaye yandisa incopho ye-4th hydration exothermic peak. Ukuqukumbela, ukukhutshwa kobushushu be-hydration kwiislurries ezintathu ze-CSA ezilungisiweyo zikhulu kunolo lwe-slurries ecocekileyo ye-CSA kwixesha lokumanzisa kwe-2.0 ~ 10.0 h, ebonisa ukuba ezintathu ze-CE's zikhuthaza ukuhanjiswa kwesamente ye-CSA kwesi sigaba. Ngexesha le-hydration ye-2.0 ~ 5.0 h, ukukhutshwa kobushushu be-hydration ye-L HEMC eguqulelwe i-samente ye-CSA iyona inkulu, kwaye i-H HEMC kunye ne-HEC yeyesibini, ebonisa ukuba umphumo wokukhuthaza ukutshintshwa kwe-HEMC ephantsi kwi-hydration ye-samente ye-CSA yomelele. . I-catalytic effect ye-HEMC yayinamandla kune-HEC, ebonisa ukuba ukuqaliswa kweqela le-methyl liphucule umphumo we-CE kwi-hydration ye-samente ye-CSA. Ubume bekhemikhali be-CE bunempembelelo enkulu kwi-adsorption yayo kumphezulu wamasuntswana e-samente, ngakumbi inqanaba lokutshintshwa kunye nohlobo lokuthatha indawo.
Isithintelo esiqinileyo se-CE sahlukile ngezinto ezithatha indawo ezahlukeneyo. I-HEC ine-hydroxyethyl kuphela kwikhonkco elisecaleni, elincinane kune-HEMC equkethe iqela le-methyl. Ngoko ke, i-HEC inempembelelo enamandla kakhulu ye-adsorption kwi-CSA ye-cement particles kunye nefuthe elikhulu kwi-reaction reaction phakathi kwee-particle ze-cement kunye namanzi, ngoko ke inomphumo wokulibaziseka ocacileyo kwi-peak yesithathu ye-hydration exothermic. Ukufunxwa kwamanzi kwe-HEMC ngokutshintshwa okuphezulu kunamandla kakhulu kunoko kwe-HEMC ngokutshintshwa okuphantsi. Ngenxa yoko, amanzi asimahla abandakanyekayo ekuphenduleni kwe-hydration phakathi kwezakhiwo ezixutyiweyo ayancitshiswa, enempembelelo enkulu kwi-hydration yokuqala yesamente ye-CSA elungisiweyo. Ngenxa yoku, incopho yesithathu ye-hydrothermal ilibazisekile. I-HEMCs yokubeka indawo ephantsi ine-absorption yamanzi ebuthathaka kunye nexesha elifutshane lesenzo, okubangela ukukhululwa kwangaphambili kwamanzi e-adsorbent kunye ne-hydration eyongezelelweyo yenani elikhulu lee-particle ze-cement ezingenamanzi. I-adsorption ebuthakathaka kunye ne-absorption yamanzi ineempembelelo ezahlukeneyo zokulibaziseka kwi-hydration dissolution kunye nesigaba sokuguqulwa kwe-samente ye-CSA, okubangelwa ukungafani kokukhuthazwa kwe-cement hydration kwinqanaba elilandelayo le-CE.
2.2 Uhlalutyo lweemveliso ze-hydration
2.2.1 Impembelelo yesiqulatho se-CE kwiimveliso ze-hydration
Guqula ijika le-TG DTG le-CSA yamanzi oludaka ngomxholo owahlukileyo we-L HEMC; Iziqulatho zamanzi abotshelelwe ngokwekhemikhali i-ww kunye neemveliso ze-hydration ze-AFt ne-AH3 wAFt kunye ne-wH3 zibalwe ngokweegophe ze-TG. Iziphumo ezibaliweyo zibonise ukuba iigophe ze-DTG ze-samente ecocekileyo ye-CSA yabonisa iincopho ezintathu kwi-50 ~ 180 ℃, 230 ~ 300 ℃ kunye ne-642 ~ 975 ℃. Ihambelana ne-AFt, i-AH3 kunye nokubola kwe-dolomite, ngokulandelanayo. Kwi-hydration 2.0 h, i-TG curves ye-L HEMC eguqulelwe i-CSA slurry iyahluka. Xa impendulo ye-hydration ifikelela kwi-12.0 h, akukho mmahluko obalulekileyo kwiigophe. Kwi-2.0h hydration, i-chemical binding content water ye-wL = 0%, 0.1%, 0.5% L HEMC eguqulelwe kwi-CSA i-cement paste yayingu-14.9%, 16.2%, 17.0%, kunye ne-AFt umxholo ngu-32.8%, 35.2%, 36.7%. ngokulandelelanayo. Umxholo we-AH3 wawuyi-3.1%, i-3.5% kunye ne-3.7%, ngokulandelanayo, ebonisa ukuba ukufakwa kwe-L HEMC kuphuculwe i-hydration degree ye-cement slurry hydration ye-2.0 h, kunye nokwandisa ukuveliswa kweemveliso ze-hydration AFt kunye ne-AH3, oko kukuthi, kukhuthazwa. ukuhanjiswa kwesamente yeCSA. Oku kungenxa yokuba i-HEMC iqulethe zombini iqela le-hydrophobic i-methyl kunye ne-hydrophilic iqela le-hydroxyethyl, enomsebenzi ophezulu ophezulu kwaye inokunciphisa kakhulu ukunyanzeliswa komphezulu wesigaba solwelo kwi-sement slurry. Kwangaxeshanye, kunomphumo wokungenisa umoya ukuququzelela ukuveliswa kweemveliso zesamente. Kwi-12.0 h ye-hydration, i-AFt kunye ne-AH3 iziqulatho kwi-L HEMC eguqulelwe i-CSA sement slurry kunye ne-CSA ecocekileyo ye-cement slurry yayingenamahluko obalulekileyo.
2.2.2 Impembelelo yabathathi-nxaxheba be-CE kunye namaqondo abo okutshintsha kwiimveliso ze-hydration
Ijiko le-TG DTG le-CSA sement slurry elungiswe yi-CE3 (umxholo we-CE yi-0.5%); Iziphumo zokubala ezihambelanayo ze-ww, i-wFt kunye ne-wH3 zimi ngolu hlobo lulandelayo: kwi-hydration 2.0 kunye ne-4.0 h, ii-curves ze-TG ze-slurries ze-cement ezahlukeneyo zihluke kakhulu. Xa i-hydration ifikelela kwi-12.0 h, ii-TG curves ze-slurries ezahlukeneyo ze-cement azikho umehluko omkhulu. Kwi-2.0 h hydration, umxholo wamanzi obophelelwe ngamachiza e-CSA ecocekileyo ye-cement slurry kunye ne-HEC, L HEMC, H HEMC eguqulelwe kwi-CSA i-samente slurry yi-14.9%, 15.2%, 17.0%, 14.1%, ngokulandelanayo. Kwi-4.0 h ye-hydration, i-TG curve ye-CSA ecocekileyo ye-cement slurry yehle kancinane. Iqondo lokumanzisa kwezintlu ezintathu ze-CE ezilungisiweyo ze-CSA slurries zazinkulu kunezo ze-slurries ze-CSA ezisulungekileyo, kunye nomxholo wamanzi abotshelelwe ngokwekhemikhali we-HEMC eguqulelwe kwi-slurries ye-CSA wawumkhulu kunolo lwe-HEC eguqulelwe kwi-slurries ye-CSA. L HEMC modified CSA isamente eludaka lwesamente isiqulatho samanzi esibopha amanzi ngowona mkhulu. Ukuqukumbela, i-CE enama-substituents ahlukeneyo kunye ne-degrees of substitution inomahluko omkhulu kwiimveliso zokuqala ze-hydration ze-CSA sement, kwaye i-L-HEMC inempembelelo enkulu yokukhuthaza ekubunjweni kweemveliso ze-hydration. Kwi-12.0 h hydration, akukho mahluko ubalulekileyo phakathi kwezinga lelahleko enkulu ye-CE eguqulweyo ye-CSA slurps kunye ne-CSA ecocekileyo ye-cement slurps, eyayihambelana neziphumo zokukhutshwa kobushushu, ebonisa ukuba i-CE ichaphazele kakhulu CSA isamente ngaphakathi 12.0 h.
Kwakhona kunokubonwa ukuba i-AFt kunye ne-AH3 yeempawu ze-peak yamandla ye-L HEMC eguqulelwe kwi-CSA slurry zezona zikhulu kwi-hydration 2.0 kunye ne-4.0 h. Umxholo we-AFt we-slurry ecocekileyo ye-CSA kunye ne-HEC, i-L HEMC, i-H HEMC eguqulelwe i-CSA slurry yayiyi-32.8%, i-33.3%, i-36.7% kunye ne-31.0%, ngokulandelanayo, kwi-2.0h hydration. Umxholo we-AH3 wawuyi-3.1%, 3.0%, 3.6% kunye ne-2.7%, ngokulandelanayo. Kwi-4.0 h ye-hydration, umxholo we-AFt wawuyi-34.9%, 37.1%, 41.5% kunye ne-39.4%, kwaye umxholo we-AH3 wawuyi-3.3%, 3.5%, 4.1% kunye ne-3.6%, ngokulandelanayo. Ingabonwa ukuba i-L HEMC inomphumo onamandla kakhulu wokukhuthaza ekubunjweni kwemveliso ye-hydration ye-samente ye-CSA, kwaye umphumo wokukhuthaza we-HEMC unamandla kune-HEC. Xa kuthelekiswa ne-L-HEMC, i-H-HEMC iphucule i-viscosity eguquguqukayo yesisombululo se-pore ngokubaluleke ngakumbi, ngaloo ndlela ichaphazela ukuthuthwa kwamanzi, okubangelwa ukuhla kwezinga lokungena kwe-slurry, kunye nokuchaphazela ukuveliswa kwemveliso ye-hydration ngeli xesha. Xa kuthelekiswa ne-HEMCs, i-hydrogen bonding effect kwii-molecule ze-HEC ibonakala ngakumbi, kwaye umphumo wokufunxa amanzi unamandla kwaye uhlala ixesha elide. Ngeli xesha, umphumo wokufunxa amanzi we-HEMCs ephezulu yokutshintshwa kunye ne-HEMCs ephantsi yokutshintshwa ayisabonakali. Ukongeza, i-CE yenza "i-loop evaliweyo" yothutho lwamanzi kwi-micro-zone ngaphakathi kwe-samente slurry, kwaye amanzi akhutshwe ngokucothayo yi-CE anokusabela ngokuthe ngqo kunye namasuntswana e-cement ajikelezileyo. Kwi-12.0 h ye-hydration, iziphumo ze-CE kwi-AFt kunye ne-AH3 yokuveliswa kwe-CSA i-cement slurry yayingasenamsebenzi.

3. Isiphelo
(1) I-hydration ye-sulfoaluminate (CSA) i-sludge kwi-45.0 min ~ 10.0 h inokukhuthazwa kunye ne-dosage eyahlukeneyo ye-low hydroxyethyl methyl fibrin (L HEMC).
(2) I-Hydroxyethyl cellulose (HEC), i-high substitution hydroxyethyl methyl cellulose (H HEMC), i-L HEMC HEMC, ezi zintathu ze-hydroxyethyl cellulose ether (CE) zilibazise ukuchithwa kunye nenqanaba lokuguqulwa kwe-CSA i-cement hydration, kunye nokukhuthaza ukuhanjiswa kwe-2.0 ~ 10.0 h.
(3) Ukuqaliswa kwe-methyl kwi-hydroxyethyl CE kunokuphucula kakhulu umphumo wayo wokukhuthaza kwi-hydration ye-CSA samente kwi-2.0 ~ 5.0 h, kwaye umphumo wokukhuthaza we-L HEMC kwi-hydration ye-samente ye-CSA yomelele kune-H HEMC.
(4) Xa umxholo we-CE ngu-0.5%, isixa se-AFt kunye ne-AH3 eveliswa yi-L HEMC iguqule i-CSA slurry kwi-hydration 2.0 kunye ne-4.0 h iyona nto iphezulu, kwaye umphumo wokukhuthaza ukuthuthwa kwamanzi kubaluleke kakhulu; I-H HEMC kunye ne-HEC eguqulelwe kwi-slurries ye-CSA ivelise umxholo ophezulu we-AFt kunye ne-AH3 kune-slurries ecocekileyo ye-CSA kuphela kwi-4.0 h ye-hydration. Kwi-12.0 h ye-hydration, iziphumo ze-3 CE kwiimveliso ze-hydration ze-samente ye-CSA zazingasenamsebenzi.