Superplasticizer (I)

Taariikhda Dhiirrigelinta: 9, Meey, 2022

(一) La qabsigapolycarboxylate superplasticizer iyo walxaha sibidhka:

Dhaqan ahaan, waxaa la ogaaday inPolycarboxylate SuperplasticizerWaxay leeyihiin dhibaatooyin la qabsi cad oo sibidhyo kala duwan iyo noocyada kala duwan ee isku-darka macdanta, mararka qaarkoodna aad bay u soo jiidanayaan. La qabsiga u dhexeeya sibidhka iyopolycarboxylate superplasticizer waxaa saameyn doona arrimo badan. Sida: qaybaha sibidhka, meel gaar ah oo dusha sare ah, alkali ka kooban yahay, maadada gypsum iyo noocyada oo dhan waxay saamayn ku leeyihiin la qabsigaPolycarboxylate Superplasticizer.

Barta saturation eePolycarboxylate SuperplasticizerSibidhyada kala duwani way kala duwan yihiin, heerka dhimista biyaha waa la dhimayaa, hoos u dhaca shubka ayaa kordhay, ifafaalaha "haraadiga digirta" waxay soo baxaan marka shamiitada ay ka maqan tahay slury, iyo dhibaatooyinka dhiig-baxa, kala-soocidda iyo kala-soocidda, iyo dhibka bamgareynta , Xasaasi u ah qiyaasta, shubka lama furi karo ama si xad dhaaf ah looma sii deyn karo. Tusaale ahaan, nuxurkapolycarboxylate superplasticizer Sibidhku waa 1.8% (walax adag oo ah 10%) si loo helo xaalad lagu qanco, halka sibidhka B loo baahan yahay in lagu qaso 2.2% si loo helo xaalad wanaagsan, mararka qaarkoodna marka ay dhaafto 2.2% qiyaasta qiyaasta, isku dhafka shubka ah. waxay u nugul tahay dhiigbax.

Waqtigan xaadirka ah, marka la eego la qabsiga eePolycarboxylate Superplasticizer, xalalkuna waa sida soo socota.

(1) Marka la eego dhismaha hubinta xoogga la taaban karo, iyada oo la hagaajinayo heerka ciidda, saamiga cabbirka wadarta guud, iyo kordhinta qadarka nidaamka la taaban karo;

(2) Khamriga hooyada waxaa lagu daraa lipids ether iyo qiyaasta si habboon loo kordhiyo. Guud ahaan, waxaa lagu talinayaa in ethers iyo lipids 5: 5 ay saameyn wanaagsan yeeshaan, qiyaasta waa in lagu kordhiyo 0.2%;

(3) Si habboon u dar ama u beddel qaybaha ay ka kooban tahay, isticmaal wakiilada hawo-mareenka ah sida SJ, Degussa DY, xasilinta xumbo AR, K12, kordhiso saamiga wakiilada slump-retaining, isticmaal sodium gluconate, sonkor, fosfat, ATMP, citric acid, istaarij la beddelay iyo dib-u-dhigeyaasha kale ee isku dhafan, iyadoo la isticmaalayo cellulose milmaya, xanthan xanjo, dextrin, la beddelay dhumucdi milmaya, ama ku darista "sulfur" ama "alkali" shubka waa la wanaajin karaa;

(4) Beddel qaab dhismeedka molecular ee polycarboxylic acid, oo hagaaji qaybo ka mid ah habka isku-dhafka si loo hagaajiyo laqabsigeeda.

Isku-darka, saameynta dambaska duqsiga ayaa iska cad inay ka weyn tahay tan budada slag. Guud ahaan, dambaska duqsiga ee fasalka koowaad waxa uu leeyahay la qabsi fiican, halka dambaska duqsiga ee fasalka labaad iyo saddexaad uu u nugul yahay is-waafajinta, gaar ahaan dambaska fasalka saddexaad. Marka tayada dambaska ay liidato, saameynta kordhinta qiyaastapolycarboxylate superplasticizerWaqtiga weli si weyn looma hagaajin karo. Sababta ugu weyn ee arrintani waa in nuxurka kaarboonka ee dambaska duqsiga ee dugsiga sare iyo sare ee leh khasaaraha dabka sare uu ka weyn yahay, awoodda xayeysiinta ee walxaha kaarboonka ee isku-darka ayaa weyn, taas oo yareyneysa adsorption-ka admixtures sibidhka, taas oo saameynaysa dareeraha la taaban karo. Markaad isticmaalayso dambaska duqsiga darajada III, ku kordhi waxa ku jira yareyaha biyaha polycarboxylate in ka badan 50%, si loo gaadho heerka dhimista biyaha marka la qaso heerka koowaad ee dambaska. Marka laga hadlayo dambaska duqsiga ee maanta oo leh tayo adag iyo qaybo kala duwan, waxaa lagama maarmaan ah in la xoojiyo ilaalinta tayada dambaska iyo xoojinta tijaabada marka la isticmaalayo. polycarboxylate superplasticizer.