Superplasticizer(I)

Post Date: 9, Chivabvu, 2022

(一) Kuchinjika kwepolycarboxylate superplasticizer uye simende zvinhu:

Mukuita, zvakaonekwa kutiPolycarboxylate Superplasticizervane matambudziko akajeka ekuchinjika kumasimende akasiyana uye marudzi akasiyana emamineral admixtures, uye dzimwe nguva anotonyanya kusarudza.Iko kuchinjika pakati pesimende uyepolycarboxylate superplasticizer zvichakanganiswa nezvinhu zvakawanda.Zvakadai se: masimende, nzvimbo chaiyo, alkali yemukati, gypsum yemukati uye mhando zvese zvine chekuita nekuchinjika kwePolycarboxylate Superplasticizer.

Iyo saturation point yePolycarboxylate Superplasticizernokuda kwemasimende akasiyana zvakasiyana, chiyero chekudzikisa mvura chinoderedzwa, kudonha kwekongiri kunowedzera, chiitiko che "bhinzi yebhinzi yakasara" inoonekwa apo kongiri inoshaya slurry, uye matambudziko ekubuda ropa, sedimentation uye kupatsanurwa, uye kuoma pakupomba. , Sensitive to the dosage, konkrete haigoni kuvhurwa kana kusunungurwa zvakanyanya.Semuenzaniso, zviri mukati mepolycarboxylate superplasticizer kuA simende i1.8% (yakasimba ye10%) kuti iwane nyika inogutsa, nepo B simende inoda kusanganiswa ne2.2% kuti iwane mamiriro ari nani, uye dzimwe nguva kana yadarika 2.2% % yedosi, musanganiswa wekongiri. anowanzobuda ropa.

Parizvino, maererano nekugadziriswa kwePolycarboxylate Superplasticizer, mhinduro dzinotevera:

(1) Pachimiro chekusimbisa kusimba kwekongiri, nekugadzirisa jecha chiyero, saizi reshiyo yeyakakura aggregate, uye kuwedzera huwandu hwekongiri system slurry;

(2) Doro raamai rinosanganiswa ne ether lipids uye dosi inowedzerwa zvakakodzera.Kazhinji, zvinokurudzirwa kuti ethers uye lipids 5: 5 zvive nemigumisiro iri nani, uye chiyero chinofanira kuwedzerwa ne 0.2%;

(3) Yakakodzera kuwedzera kana kushandura zvikamu zvayo, shandisa mhepo-intraining agents seSJ, Degussa DY, foam stabilizer AR, K12, kuwedzera chikamu chekuchengetedza-kudonha, kushandisa sodium gluconate, shuga, phosphate, ATMP, citric acid , yakagadziridzwa starch uye zvimwe zvinoumba retarders, kushandisa soluble cellulose, xanthan gum, dextrin, modified soluble thickener, kana kuwedzera "sarufa" kana "alkali" kune kongiri inogona kuvandudzwa;

(4) Shandura chimiro chemolecular yepolycarboxylic acid, uye gadzirisa zvimwe zvikamu muhurongwa hwekugadzira kuti ugadzirise kuchinjika kwayo.

Kune admixtures, pesvedzero yemadota anobhururuka zviri pachena kuti yakakura kupfuura yehupfu hwe slag.Kazhinji, giredhi rekutanga nhunzi dota rine zvakanaka kuchinjika, nepo giredhi rechipiri nerechitatu renhunzi dota rinowanzoita kusapindirana, kunyanya giredhi rechitatu nhunzi dota.Kana madota emhando yakashata, mhedzisiro yekuwedzera dosage yepolycarboxylate superplasticizernekufamba kwenguva haigone kuvandudzwa zvakanyanya.Chikonzero chikuru chechiitiko ichi ndechekuti iyo kabhoni yemhando yechipiri uye yekumusoro inobhururuka madota ine yakakwira yekudzima kurasikirwa yakakura, uye iyo adsorption yehuwandu hwekabhoni particles kune admixtures yakakura, nekudaro ichidzikisa adsorption yeadhimixture kune simenti, inokanganisa iyo Concrete fluidity.Paunenge uchishandisa giredhi III inobhururuka madota, wedzera zvirimo zvepolycarboxylate mvura inoderedza neinopfuura 50%, kuitira kuti uwane mwero wekudzikisa mvura paunosanganisa giredhi rekutanga nhunzi dota.Pamberi pemazuva ano anobhururuka madota ane hutano hwakaoma uye zvikamu zvakasiyana, zvakakosha kusimbisa hutano hwekutonga kwenhunzi uye kusimbisa muedzo paunenge uchishandisa. polycarboxylate superplasticizer.