Kutheni uMxube wakho weConcrete ufuna uMdibaniso oPhezulu waManzi wokuNcitshiswa kweSuperplasticizer (kunye nokuba Uyitsibe nini)

Impendulo emfutshane: uluhlu oluphezulu lwamanzi okunciphisa i-superplasticizer admixture sesona sixhobo sisebenzayo kufuneka sophule i-tradeoff yakudala phakathi kwekhonkrithi. amandla kunye nokusebenza. Isenza sinqumle amanzi 12 ukuya 30 ipesenti ngelixa ugcina ulwelo lomxube ngokwaneleyo ukumpompa, indawo, kwaye ugqibe ngaphandle kokulwa. Kodwa nanku umkhabi – sebenzisa kakubi, kwaye uya kuleqa ukudilika imini yonke, ukulwa ucalucalulo, okanye ugqibe ngekhonkrithi ebeka phambi kokuba uyikhuphe elorini. Ndiyibonile isenzeka kwiindawo zemisebenzi ukusuka kwiindawo eziphakamileyo eDubai ukuya kwiiyadi zeprecast eOhio. Le asiyothiyori. Yile nto esiyifunde kabuhlungu.

Yintoni kanye Luluhlu oluphezulu lwamanzi okunciphisa i-Superplasticizer Admixture?

Siyibiza ngokuba yi-HRWR ngokufutshane, kodwa igama elisemthethweni nge-ASTM C494 luhlobo F (uluhlu oluphezulu amanzi ukunciphisa) okanye Uhlobo G (Uluhlu oluphezulu lokunciphisa kunye nokunciphisa amanzi). Ngumxube weekhemikhali olungiselelwe ukwenza into enye ngendlela ebalaseleyo: deflocculate amasuntswana esamente. Kumxube oqhelekileyo, iinkozo zesamente zithande ukudityaniswa, ukubamba amanzi angenzi nto ngokusebenza. Loo manzi avalelekileyo ayachithwa. I-HRWR ichithachitha ezo ziqhuma, ukukhulula amanzi ukuthambisa intlama. Isiphumo kukuncitshiswa okumangalisayo kwemfuno yamanzi ngaphandle kokulahlekelwa kukuwohloka. Sithetha ngokujika ukuqina, Umxube we-zero-slump ube yinto ehambayo, ukuziphakamisa – okanye ngokuchaseneyo, ukuthatha kwaloo mxube mnye kwaye uwugcine uqinile ngelixa uwisa umxholo wamanzi ukuze unyanzelise amandla e-monster.

Ingaba isebenza kanjani? Inzululwazi esiyisebenzisa ngokwenene

Iindlela ezimbini ezilawula isenzo samanzi anamhlanje kuluhlu oluphezulu lokunciphisa imixube ye-superplasticizer. Ekuqaleni, Ukusasazwa kwe-electrostatic. Iimolekyuli kwi umxube i-adsorb kumphezulu wamasuntswana esamente, giving them a strong negative charge. Like charges repel, so the particles push each other apart. This is the older technology, and it works, but it has a weakness – the repulsion can be screened by ions in the pore solution over time, leading to slump loss. That is why you see some guys on Reddit complaining that their concrete stiffened up in 20 imizuzu. Isibini, and more importantly for today, isithintelo sesteric. The newer polycarboxylate ether (PCE) superplasticizers have long side chains that physically block the particles from getting close enough to flocculate. This is far more robust. It maintains dispersion longer, even in high-alkali environments. We have tested both side by side in the lab. The difference is not subtle.

The Real Performance Metrics That Matter

Forget the marketing numbers. What we care malunga on the job are three things: initial slump, ukugcinwa kokudodobala, kunye nokuhambelana.

• Ukulala kokuqala: Umgangatho we-HRWR kufuneka uvumele ukuba ubethe a 9- ukuya 10-intshi ukuwohloka ukusuka kumxube ukuba ngokuqhelekileyo kukunika 3 intshi. Ukuba awuyiboni loo nto, Idosi yakho ivaliwe, okanye i-samente yakho ilwa ne-admixture.
• Ukugcinwa kwe-slump: Udinga oko kudodobala ukuze ubambe ubuncinci 45 ukuya 60 imizuzu phantsi kweemeko eziqhelekileyo. Ukuba iwa ngokukhawuleza, mhlawumbi ugqithise idosi kwi-accelerating admixture, okanye i-superplasticizer yakho ayenzelwanga ikhemistri yakho yesamente. Jonga ibhalansi yesulfate.
• Ukuhambelana: Lo ngumgibe ofihliweyo. Uluhlu oluphezulu lwamanzi okunciphisa i-superplasticizer admixture inokusebenza ngokugqibeleleyo kunye noHlobo lwe-I/II lwesamente ukusuka kwisityalo esinye kwaye ijike ibe yijeli engenamsebenzi enoHlobo lwe-III ukusuka kwenye.. Siyibonile isenzeka. Ityala lidla ngokuba ngumxholo we-C3A wesamente. Iisamente ze-C3A eziphezulu (ngaphaya 8 ipesenti) inokusebenzisa i-superplasticizer ngaphambi kokuba ibe nethuba lokusebenza. Ulungiso lunokuba luxube olwahlukileyo chemistry okanye ukongeza i-HRWR kamva kumjikelo wokudibanisa..

Apho ufuna i-HRWR ngokupheleleyo

Sineemeko ezintathu zokusetyenziswa eziphambili ezingenakuxoxisana.

Ikhonkrithi yokusebenza okuphezulu (HPC). Ukuba ujolise 8,000 psi okanye ngaphezulu, usika umlinganiselo wakho wesamente yamanzi ngaphantsi 0.35. Ngaphandle koluhlu oluphezulu lokuncitshiswa kwamanzi superplasticizer umxube, loo mxube awusebenzi. Iya kuba yomile, ubugqwirha bamatye ekungekho vibrator inokulungisa. I-HRWR ikuvumela ukuba uyibeke, yidibanise, kwaye ufumane i-microstructure eshinyeneyo efunekayo ukuze uhlale ixesha elide.

Ukuziqinisa ikhonkrithi (SCC). Lo ngumntwana wepowusta yee-superplasticizers. I-SCC ixhomekeke ngokupheleleyo kwi-admixture ukufezekisa ubumanzi obufunekayo ukuhamba ngokuqiniswa okuxineneyo ngaphandle kokungcangcazela.. Siyisebenzisile kwiikholamu zebhulorho yepier enesithuba se-rebar esixineneyo kangangokuba awukwazi ukufaka ipensile phakathi kwazo.. Kulungile HRWR, akukho SCC. Ixesha.

Ikhonkrithi empompo yezakhiwo ezide. Xa umpompa ikhonkrithi 300 iinyawo ngokuthe nkqo, udinga umxube odityanisiweyo ngokwaneleyo ukuba ungahluleli kodwa ulwelo olwaneleyo lokutyhala umgca. Uluhlu oluphezulu lwamanzi okunciphisa i-superplasticizer admixture ikunika ibhalansi. Siye sabona imisebenzi apho umqhubi wempompo unokuziva umahluko kuxinzelelo lomgca – mpuluswa, ukumpompa lula, kunye nokuncinci ukunxiba kwisixhobo.

Ezona mpazamo Ziqhelekileyo Sizibonayo (kunye Nendlela Yokuziphepha)

Nantsi into efaka abantu engxakini. Ekuqaleni, ukugqithisa ngokweqile. Kuyahenda ukuqhubeka ukongeza i-HRWR ukuze ufumane ukuwohloka okungakumbi. Kodwa kudlule inqaku elithile, ubetha iimbuyekezo ezinciphayo. Ikhonkrithi inokuba ngaphezulu kwesanti kwaye incangathi, okanye okubi ngakumbi, inokwahlula – i-aggregates ihleli, kwaye umaleko wokuncamathelisa udada ukuya phezulu. Oku sikubiza “ukopha kwi-steroids.” Ukulungiswa kukunamathela kuluhlu lwedosi ecetyiswayo yomenzi kwaye uyandise kuphela ukuba uvavanye umxube kwiimeko zakho ezithile..

Isibini, ukudibanisa ulandelelwano. Le ibalulekile. Ukuba wongeza uluhlu oluphezulu lwamanzi okunciphisa i-superplasticizer admixture ukomisa isamente, kunokubangela ukusetwa kwe-flash okanye ukulahleka ngokukhawuleza kokusebenza. Umxube udinga amanzi kunye nokucheba ukuze usasazeke ngokufanelekileyo. Umgangatho oqhelekileyo esiwufundisayo kukuxuba amanzi nesamente kuqala, yiyeke ibemanzi ngaphandle 30 ukuya 60 imizuzwana, uze udibanise umxube. Oku kunika amasuntswana esamente ithuba lokugalela amanzi kancinci phambi kokuba izinto ezisasazwayo zisebenze. Siye sabhala iimeko apho ukutshintsha ulandelelwano lokudibanisa kuphela kwandisa ukugcinwa kokudodobala ngo 30 imizuzu.

Isithathu, ukungahoyi ubushushu. Imozulu eshushu ikhawulezisa ukusabela kweekhemikhali. Idosi esebenza ngokugqibeleleyo kuma-70°F inokusilela ngokupheleleyo kuma-95°F. Kufuneka uhlengahlengise – nokonyusa idosi kancinane okanye utshintshele kuguqulelo olubambekayo (Uhlobo G). Ngokuchaseneyo, Imozulu ebandayo ithoba yonke into. Unokufuna i-admixture encinci okanye i-accelerator ukulinganisa ixesha elibekiwe.

Ukuthelekisa i-HRWR neziNciphisi zaManzi eziPhakathi

Umbuzo esiwufumana rhoqo: “Kutheni ungasebenzisi nje isinciphisi samanzi esiphakathi?” Impendulo ihla ekusebenzeni kunye neendleko. Izinciphisi zamanzi kuluhlu oluphakathi (I-ASTM C494 Uhlobo A) ngokuqhelekileyo ukufikelela 6 ukuya 10 ipesenti yokunciphisa amanzi. Oko kulungile kumsebenzi wesiqhelo we-flatwork apho ufuna i-slump ephezulu kancinane. Kodwa abanako ukuvelisa umlinganiselo wesamente wamanzi osezantsi kakhulu okanye uqukuqelo oluzidibanisayo olunokuthi uluhlu oluphezulu lwamanzi olunciphisa umxube we-superplasticizer lukwazi.. Umahluko weendleko yinyani – Ii-HRWR zibiza kakhulu ngegaloni nganye – kodwa ixabiso alinakuphikiswa xa ufuna olo sebenziso olongezelelweyo. Siwaqhube amanani: ukwenzela ukugalela ikholomu ephezulu, Ixabiso elongezelelweyo le-superplasticizer lihlala lilungiswa ngokugcinwa emsebenzini kunye nokungcangcazela kuphela.

Ulawulo lwemeko: Oko Sijonga Ngalo lonke ixesha

Ukungqinelana ligama lomdlalo. Asiwuvumeli umthwalo ushiye isityalo ngaphandle kokujonga izinto ezintathu.

• Umxholo womoya: Ezinye ii-HRWRs zinokufaka umoya omncinci (1 ukuya 3 ipesenti). Ngokuqhelekileyo oko kulungile, kodwa kufuneka uyazi. Ukuba usebenzisa i-admixture yokungenisa umoya, kufuneka ulungise ithamo. Siye sabona iimeko apho indibaniselwano inike ngengozi 8 umoya ekhulwini, ixabiso 20 amandla ocinezelayo ekhulwini.
• Ukuthoba vs. ixesha: Silinganisa i-slump ngokukhawuleza emva kokuxuba, emva koko kwakhona ngo 30 kwaye 60 imizuzu. Ukuba ilahleko ingaphezulu 2 intshizi ngeyure, silungisa idosi okanye songeza i-middle-range yokunciphisa amanzi njengento ephezulu kwindawo yomsebenzi. Le yindlela eqhelekileyo yokuthatha ixesha elide.
• Ubunzima beyunithi: Oku kubamba ucalucalulo. Ukuba ubunzima beyunithi buhla kakhulu kwithagethi yoyilo, ikhonkrithi inomoya kakhulu okanye sele iqalile ukopha. Yeka ukugalela kwaye uphinde ucaphuke.

Ugcino kunye nobomi beshelufa bubalulekile, ngokunjalo. Uluhlu oluphezulu lwamanzi okunciphisa i-superplasticizer admixture kufuneka igcinwe kwindawo epholileyo, indawo eyomileyo, ngaphandle kokukhanya kwelanga. Ukuba ingumkhenkce, inokuphulukana nokusebenza kwayo. Sisoloko sijikelezisa isitokhwe – kuqala kwi, kuqala ngaphandle – kwaye ungaze usebenzise imveliso engaphezulu kwe 12 iinyanga ngaphandle kokuba siyivavanye elebhu. Iindleko zomthwalo ongaphumelelanga zidlula kakhulu iindleko zokulahla umxube omdala.

Inyaniso Enzima malunga nee-Drawbacks

Masinyaniseke. Ii-HRWRs aziyombumbulu yomlingo. Ilahleko yokudodobala ngokuhamba kwexesha sesona sikhalazo siphambili esisivayo kwiiforam kunye nakoogxa bethu. Yinyani. Umxube usasaza amasuntswana, kodwa njengoko i-hydration iqhubeka, iimveliso ze-hydration ziqala ukuzincamathelisa kwakhona. Ukuwa kuyahamba. Ekuphela kwendlela yokuyilawula kukongeza i-admixture emva kwexesha kangangoko kunokwenzeka kumjikelo wokuxuba kunye nokunqanda amaqondo obushushu aphezulu..

Ukwahlukaniswa ngomnye umngcipheko omkhulu. Xa unciphisa i-viscosity ye-paste kakhulu, i-aggregates ayisakwazi ukuhlala inqunyanyisiwe. Sikubonile oku kwenzeka kumsebenzi we-flatwork apho abagqibayo baphela ngomgangatho ogudileyo ophezulu kunye nomzantsi onamatye. Isisombululo kukugcina umxholo wodaka ulungelelene. Ukuba wongeza i-superplasticizer, uhlala ufuna ukonyusa umxholo odibeneyo kancinane ukugcina umanyano.

Ekugqibeleni, ukuhambelana neminye imixube. Ukuxuba i-HRWR kunye nedosi ephezulu ye-retarder kunokukunika ikhonkrithi ehlala ulwelo iiyure ezine. Oko kuvakala kukuhle de uqonde ukuba ayizukufumana amandla kangangeentsuku ezimbini. Ngokuchaseneyo, ukuyixuba ne-accelerator kunokubangela iseti ye-flash. Vavanya indibaniselwano yakho kuqala. Asinakugxininisa ngokwaneleyo oku.

Yintoni esikucebisa ukuba uyenze ngoku

Ukuba umtsha ekusebenziseni uluhlu oluphezulu lwamanzi okunciphisa i-superplasticizer admixture, qala ngebhetshi yovavanyo. Hayi ibhetshi yaselebhu – ibhetshi yelori epheleleyo enezixhobo zakho zokwenyani, kwiqondo lobushushu langempela uya kubeka. Linganisa yonke into. Rekhoda ukuwohloka, umxholo womoya, kunye neqondo lobushushu ngalinye 15 imizuzu yeyure yokuqala. Thelekisa iziphumo kwiinkcukacha zoyilo lwakho. Lungisa idosi kunye nolandelelwano lokuxuba de ube nomxube ophindaphindwayo. Oko kuphindaphindwa yi-inshurensi yakho.

Ukuba unamava kodwa ubetha udonga, jonga kumthombo wakho wesamente. Yitshintshe. Sibonile iikontraka zitshintsha ababoneleli besamente kwaye ngequbuliso iHRWR yabo isebenza ngokugqibeleleyo kuba iC3A yehlile 11 ipesenti ukuya 6 ipesenti. Olo tshintsho lunye lubasindise amawaka kwiindleko ze-admixture.

Asithengisi imixube. Injongo yethu kuphela kukukunceda ukuba uyifumane okokuqala. Ikhonkrithi yinto ephilayo. Yiphathe ngentlonipho, ukuqonda chemistry, kunye noluhlu oluphezulu lwamanzi okunciphisa i-superplasticizer admixture iya kuba ngumhlobo wakho omhle. Yiphathe njengesongezo esilula, kwaye iya kukuthoba. Uvavanyo, lungisa, uvavanyo kwakhona. Nantso indlela.

Umthengisi
I-ConcreteAndMore ngumthengisi othembekileyo wehlabathi jikelele wezinto ezixubeneyo zekonkrithi ezisebenza kakhulu kunye neekhemikhali zokwakha.. Ngeminyaka yobungcali kwishishini, Sisebenza ngokukhethekileyo ekuboneleleni ngezisombululo ezintsha eziquka iipolycarboxylate superplasticizers, imicu yekhonkrithi, defoamers, ii-arhente zogwebu, kunye neemveliso zokugquma ubushushu be-airgel. Ukuba unomdla kwi-concrete admixture, nceda uzive ukhululekile ukuqhagamshelana nathi!