Basa rezve redispersible polymer poda mu putty poda

Basa reredispersiblepolymerupfumu putty powder: ine yakasimba adhesion uye mechanical zvivakwa, kwakatanhamara kusapinda kwemvura, permeability, uye yakanakisa alkali kuramba uye kusapfeka kupfeka, uye inogona kuvandudza kuchengetwa kwemvura uye kuwedzera Yakavhurika nguva yekuwedzera kusimba.

1. Mhedzisiro yedhaka richangobva kusanganiswa

1) Kuvandudza kuvaka.

2) Kuwedzera kuchengetedza mvura yekuvandudza simende hydration.

3) Kuwedzera kushanda.

4) Dzivisa kutanga kutsemuka.

2. Mhedzisiro yekuomesa dhaka

1) Deredza elastic modulus yedhaka uye kuwedzera kuenderana neiyo base layer.

2) Wedzera kushanduka uye kuramba kuputika.

3) Kuvandudza kushorwa kwehupfu inodonha.

4) Hydrophobic kana kuderedza kunyura kwemvura.

5) Wedzera kunamatira kune base layer.

Iyo redispersible latex poda inoumba polymer emulsion inosangana nemvura.Munguva yekusanganiswa uye kuomeswa, emulsion inopera mvura zvakare.Iyo latex poda inoita muputty poda, uye iyo composite system yekugadzira simende hydration uye latex poda firimu kuumbwa inopedzwa mumatanho mana:

① Kana iyo redispersible latex poda yakasanganiswa nemvura muputty poda, inoparadzirwa kuita zvidimbu zvepolymer;

②Iyo simende gel inoumbwa zvishoma nezvishoma kuburikidza nekutanga hydration ye simenti, chikamu chemvura chinozadzwa neCa (OH) 2 yakaumbwa panguva ye hydration process, uye zvikamu zvepolymer zvinoumbwa nelatex powder zvinoiswa pamusoro pejel simenti / unhydrated sement particle musanganiswa;

③ Sezvo simende ichiwedzera hydrated, mvura iri mu capillary pores inoderera, uye zvidimbu zvepolymer zvishoma nezvishoma zvinovharirwa mu capillary pores, zvichiita dhizaini yakanyatsorongedzwa pamusoro pesimende gel / unhydrated sement particle musanganiswa uye filler;

④ Pasi pechiito che hydration reaction, base layer absorption uye kubuda kwepasi, hunyoro hunowedzera kudzikiswa, uye akaumbwa akaturikidzana akaunganidzwa kuita firimu rakatetepa, uye zvigadzirwa zve hydration zvinobatanidzwa pamwechete kuti zvigadzire yakakwana network.Iyo composite sisitimu inoumbwa ne simenti hydration uye latex poda firimu kuumbwa inovandudza kusimba kwekupwanya kuramba kweputty.

Kubva pakuona kwekushanda kwekushanda, simba reputty rinoshandiswa sechitubu chekushandura pakati pekunze kwekunze uye kuvhara kwemadziro ekunze hakufaniri kunge kwakakwirira kudarika iyo yekupura dhaka, kana zvisina kudaro zviri nyore kubudisa kuputika.Mune iyo yese insulation system, kuchinjika kwe putty kunofanirwa kunge kwakakwira kupfuura iyo ye substrate.Nenzira iyi, iyo putty inogona kuchinjika zvirinani kune deformation ye substrate uye kuvharira iyo yega deformation pasi pechiito chekunze kwemamiriro ekunze, kudzoreredza kushushikana, uye kuderedza mukana wekupaza uye peeling yejasi.