Superplasticizer(I)

Letsatsi la poso: 9, Mots'eanong, 2022

(一) Ho ikamahanya le maemo hopolycarboxylate superplasticizer le lisebelisoa tsa samente:

Ka ts'ebetso, ho fumanoe horePolycarboxylate Superplasticizerba na le mathata a hlakileng a ho ikamahanya le maemo ho lisamente tse fapaneng le mefuta e fapaneng ea metsoako ea liminerale, 'me ka linako tse ling ba bile ba khetha haholo. Ho ikamahanya le maemo pakeng tsa samente lepolycarboxylate superplasticizer e tla angoa ke lintlha tse ngata. Joalo ka: likarolo tsa samente, sebaka se ikhethileng, litaba tsa alkali, dikahare tsa gypsum le mefuta e fapaneng kaofela li na le tšusumetso ho feto-fetoha ha maemo.Polycarboxylate Superplasticizer.

The saturation point ofPolycarboxylate Superplasticizerbakeng sa samente e fapaneng e fapane, tekanyo ea ho fokotsa metsi e fokotsehile, tahlehelo ea ho putlama ha konkreite ea eketseha, ketsahalo ea "masala a linaoa" e hlaha ha konkreite e haelloa ke slurry, le mathata a ho tsoa mali, sedimentation le karohano, le bothata ba ho pompa. , E na le kutloelo-bohloko ho tekanyo, konkreite e ke ke ea buloa kapa ea lokolloa ka mokhoa o feteletseng. Mohlala, litaba tsapolycarboxylate superplasticizer bakeng sa samente ea A ke 1.8% (litekanyo tse tiileng tsa 10%) ho fumana boemo bo khotsofatsang, ha B samente e lokela ho kopanngoa le 2.2% ho fumana boemo bo molemo, 'me ka linako tse ling hang ha e feta 2.2% % ea tekanyo, motsoako oa konkreite. e tloaetse ho tsoa mali.

Hajoale, ho latela maemo a ho ikamahanya le maemo aPolycarboxylate Superplasticizer, litharollo ke tse latelang:

(1) Sebakeng sa ho netefatsa matla a konkreite, ka ho lokisa sekhahla sa lehlabathe, karo-karolelano ea boholo ba kakaretso e mahoashe, le ho eketsa bongata ba slurry ea tsamaiso ea konkreite;

(2) Joala ba 'm'e bo kopantsoe le li-ether lipids mme tekanyo ea eketseha ka nepo. Ka kakaretso, ho kgothaletswa hore ethers le lipids 5: 5 li be le phello e molemo, 'me tekanyo e lokela ho eketseha ka 0.2%;

(3) Eketsa kapa u fetole likarolo tsa eona ka mokhoa o nepahetseng, sebelisa li-air-entraining agents tse kang SJ, Degussa DY, foam stabilizer AR, K12, eketsa karolo ea li-slump-retaining agents, sebelisa sodium gluconate, tsoekere, phosphate, ATMP, citric acid , setache se fetotsoeng le li-retarders tse ling tse kopantsoeng, ho sebelisa selulose e qhibilihang, xanthan gum, dextrin, motei o fetotsoeng o qhibilihang, kapa ho eketsa "sulfur" kapa "alkali" ho konkreite ho ka ntlafatsoa;

(4) Fetola sebopeho sa limolek'hule tsa polycarboxylic acid, 'me u fetole likarolo tse ling ts'ebetsong ea synthesis ho lokisa maemo a eona.

Bakeng sa li-admixtures, tšusumetso ea molora oa fofa ho hlakile hore e kholo ho feta ea phofo ea slag. Ha re bua ka kakaretso, molora oa lintsintsi oa sehlopha sa pele o khona ho ikamahanya le maemo, athe molora oa lintsintsi oa sehlopha sa bobeli le oa boraro o na le bothata ba ho se lumellane, haholo-holo molora oa sehlopha sa boraro. Ha boleng ba molora bo futsanehile, phello ea ho eketsa litekanyetso tsapolycarboxylate superplasticizerka nako e ntse e ke ke ea ntlafatsoa haholo. Lebaka le ka sehloohong la ketsahalo ena ke hore carbon content ea bobeli le tertiary fofa molora le phahameng hotetsa tahlehelo e khōloanyane, le matla adsorption ea likaroloana k'habone ho admixtures e khōlō, ka tsela eo ho fokotsa adsorption ea admixtures ho samente, amang metsi a Concrete. Ha u sebelisa sehlopha sa III fly ash, eketsa litaba tsa polycarboxylate water reducer ka ho feta 50%, e le ho finyella sekhahla sa phokotso ea metsi ha u kopanya molora oa ntsintsi ea sehlopha sa pele. Ha u tobane le molora oa kajeno oa fofa ka boleng bo rarahaneng le likarolo tse fapaneng, hoa hlokahala ho matlafatsa taolo ea boleng ba molora oa fofa le ho matlafatsa teko ha u sebelisa. polycarboxylate superplasticizer.