Umhla wokuPoswa:9,Jan,2023

Ziziphi izinciphisi zamanzi?

Ukunciphisa amanzi (njenge-Lignosulfonates) luhlobo lwe-admixture eyongezwa kwikhonkrithi ngexesha lokuxuba. Abanciphisi bamanzi banokunciphisa umthamo wamanzi nge-12-30% ngaphandle kokuphazamisa ukusebenza kwekhonkrithi okanye amandla omatshini wekhonkrithi (esivame ukuyivakalisa ngokwamandla oxinzelelo). Kukho amanye amagama abanciphisi baManzi, abaziiSuperplasticizers, iiplasticizers okanye izinciphisi zamanzi ezikwinqanaba eliphezulu (HRWR).

Iindidi ze-Admixtures zokunciphisa amanzi

Kukho iintlobo ezininzi ze-admixtures zokunciphisa amanzi. Iinkampani zokuvelisa zinika amagama ahlukeneyo kunye nokuhlelwa kwezi ngxubevange ezifana ne-water-proofers, i-densifiers, izixhobo zokusebenza, njl.

Ngokubanzi, sinokuhlela izinciphisi-manzi zibe ziindidi ezintathu ngokwemichiza yazo (njengakuTheyibhile 1):

i-lignosulfonates, i-hydroxycarboxylic acid, kunye ne-hydroxylated polymers.

Uvela phi uLignin?

I-Lignin yimathiriyeli enzima emele malunga ne-20% yokwakheka kweenkuni. Ngexesha lenkqubo yokuvelisa i-pulp yokwenza iphepha kumthi, utywala obumdaka buqulunqwa njengemveliso equkethe umxube onzima wezinto, kubandakanywa iimveliso zokubola kwe-lignin kunye ne-cellulose, iimveliso ze-sulfonation ze-lignin, ii-carbohydrates ezahlukeneyo (iswekile) kunye i-asidi ye-sulphurous yamahhala okanye i-sulfates.

I-neutralization elandelayo, imvula kunye neenkqubo zokuvundiswa zivelisa uluhlu lwe-lignosulfonates yobunyulu obuhlukeneyo kunye nokwakheka ngokuxhomekeke kwinani lezinto, ezifana ne-alkali yokungathathi hlangothi, inkqubo ye-pulping esetyenzisiweyo, iqondo lokuvutshelwa kunye nohlobo kunye nobudala bomthi osetyenziswa njenge ipulp feedstock.

I-Lignosulfonates njenge-water-reducers kwi-Concrete

Idosi ye-Lignosulfonate superplasticizer ngokuqhelekileyo i-0.25 ekhulwini, enokubangela ukunciphisa amanzi ukuya kwi-9 ukuya kwi-12 ekhulwini kumxholo we-samente (0.20-0.30%). Njengoko isetyenziswe kwidosi efanelekileyo, amandla ekhonkrithi aphuculwe nge-15-20% xa kuthelekiswa nekhonkrithi yereferensi. Amandla akhula ngama-20 ukuya kuma-30 ekhulwini emva kweentsuku ezi-3, ngeepesenti ze-15-20 emva kweentsuku ezi-7, kwaye ngesixa esifanayo emva kweentsuku ezingama-28.

Ngaphandle kokuguqula amanzi, ikhonkrithi inokuhamba ngokukhululekileyo, nto leyo eyenza kube lula ukusebenza ngayo (okt ukwandisa ukusebenza).

Ngokusebenzisa itoni enye ye-lignosulfonate superplasticizer powder endaweni yesamente, unokonga iitoni ezingama-30–40 zesamente ngelixa ugcina ukudilika kwekhonkrithi efanayo, ukuqina, kunye nekhonkrithi yereferensi.

Kwimeko eqhelekileyo, ikhonkrithi exutywe nale arhente inokulibazisa ubushushu obuphezulu be-hydration ngaphezu kweeyure ezintlanu, ixesha lokugqibela lokumisela ikhonkrithi ngaphezu kweeyure ezintathu, kunye nexesha lokubeka ikhonkrithi ngaphezu kweeyure ezintathu xa kuthelekiswa nekhonkrithi yereferensi. Oku kunenzuzo kulwakhiwo lwasehlotyeni, uthutho lwekhonkrithi yemveliso, kunye nekhonkrithi eninzi.

I-Lignosulfonate superplasticizer ene-micro-entraining inokuphucula ukusebenza kwekhonkrithi ngokokunganyibiliki komkhenkce.