Ndeapi mabasa uye zvinodiwa zvezvinhu zvakasiyana mugypsum-based self-leveling mortar?

(1) Gypsum

Zvinoenderana neyakagadzirwa zvinhu zvinoshandiswa, yakakamurwa kuva mhando II anhydrite uye α-hemihydrate gypsum. Zvinhu zvavanoshandisa ndezvi:

① Type II anhydrous gypsum

Iyo yakajeka gypsum kana alabaster ine yakakwira giredhi uye yakapfava manyoro inofanira kusarudzwa. Iyo tembiricha yecalcination iri pakati pe650 ne800 ° C, uye iyo hydration inoitwa pasi pechiito che activator.

②-Gypsum hemihydrate

-Iyo tekinoroji yekugadzira yehemihydrate gypsum inonyanya kusanganisa yakaoma kutendeuka maitiro uye yakanyorova kutendeuka nzira inonyanya kubatanidza kupera mvura uye kuomesa.

(2) Simende

Paunenge uchigadzira yega-leveling gypsum, chidimbu chidiki chesimende chinogona kuwedzerwa, uye mabasa ayo makuru ndeaya:

①Ipa iyo alkaline nharaunda kune mamwe masanganiswa;

② Kuvandudza iyo inopfavisa coefficient yegypsum yakaoma muviri;

③ Kuvandudza slurry fluidity;

④Gadzirisa nguva yekuseta yemhando Ⅱ anhydrous gypsum inodzikamisa gypsum.

Simende inoshandiswa i42.5R Portland simende. Paunenge uchigadzira gypsum ine mavara ega-leveling, chena Portland simende inogona kushandiswa. Kuwanda kwesimende yakawedzerwa hakubvumirwi kudarika 15%.

(3) Kuisa mutongi wenguva

Mukuzvimiririra gypsum mortar, kana mhando II anhydrous gypsum ikashandiswa, accelerator yekugadzika inofanira kushandiswa, uye kana -hemihydrate gypsum ikashandiswa, kugadzirisa retarder kunowanzo shandiswa.

① Coagulant: Inoumbwa neakasiyana sulfate uye yakapetwa kaviri munyu, senge calcium sulfate, ammonium sulfate, potassium sulfate, sodium sulfate uye akasiyana alums, akadai sealum (aluminium potassium sulfate), red alum (potassium dichromate), bile alum ( mhangura sulfate), nezvimwewo:

②Retarder:

Citric acid kana trisodium citrate inowanzoshandiswa gypsum retarder. Inonyungudika nyore mumvura, ine mhedzisiro yekudzoreredza uye mutengo wakaderera, asi zvakare inoderedza kusimba kwegypsum yakaomeswa muviri. Zvimwe gypsum retarders zvinogona kushandiswa zvinosanganisira: glue, casein glue, starch residue, tannic acid, tartaric acid, nezvimwewo.

(4) Mvura inoderedza mumiririri

Iyo fluidity ye self-leveling gypsum inyaya yakakosha. Kuti uwane gypsum slurry neine fluidity yakanaka, kuwedzera kushandiswa kwemvura chete kuchaita kuti kuderera kwesimba regypsum yakaoma muviri, uye kunyange kubuda ropa, izvo zvichaita kuti pasi nyoro, kurasikirwa nehupfu, uye haigoni kushandiswa. Naizvozvo, gypsum water reducer inofanira kuunzwa kuti iwedzere fluidity yegypsum slurry. Iwo ma superplasticizer akakodzera kugadzirira kwega-leveling gypsum anosanganisira naphthalene-based superplasticizers, polycarboxylate yakakwirira-inoshanda superplasticizers, nezvimwe.

(5) Mushandi wekuchengetedza mvura

Kana iyo yega-leveling gypsum slurry ichizvimiririra, iyo fluidity ye slurry inoderedzwa nekuda kwekutorwa kwemvura pachigadziko. Kuti uwane yakanakira yekuzvimisikidza gypsum slurry, mukuwedzera kune yayo yega fluidity kuti isangane nezvinodiwa, iyo slurry inofanirwawo kuve nekuchengetedza mvura kwakanaka. Uye nekuda kwekunaka uye kusimba kweiyo gypsum uye simende muhwaro zvinhu zvakasiyana zvakasiyana, slurry inowanzoitika ku delamination panguva yekuyerera uye iyo static kuomesa maitiro. Kuti udzivise zviitiko zviri pamusoro apa, zvakakosha kuwedzera zvishoma zvekuchengetedza mvura. Zvishandiso zvinochengeta mvura zvinowanzo shandisa zvinhu zve cellulose, zvakaita semethyl cellulose, hydroxyethyl cellulose uye carboxypropyl cellulose.

(6) polymer

Kuvandudza abrasion, kutsemuka uye kudzivirira kwemvura kwezvinhu zvinozvimisa uchishandisa redispersible polima polima.

(7) Defoamer Kubvisa mabhuru emhepo anogadzirwa panguva yekusanganiswa kwezvinhu, tributyl phosphate inowanzo shandiswa.

(8) filler

Inoshandiswa kudzivirira kupatsanurwa kwezvigadziriso zvemukati zvemukati kuitira kuti ive nani fluidity. Mafirita anogona kushandiswa, akadai se dolomite, calcium carbonate, pasi nhunzi madota, pasi mvura-yakadzimwa slag, jecha rakanaka, nezvimwe.

(9) Kuunganidzwa kwakanaka

Chinangwa chekuwedzera yakaringana kudzikisa kuomeswa kweiyo yega-leveling gypsum yakaomeswa muviri, kuwedzera simba repamusoro uye kupfeka kuramba kwemuviri wakaoma, uye kazhinji kushandisa jecha requartz.

Ndezvipi zvinhu zvinodikanwa zvegypsum self-leveling mortar?

Iyo β-mhando hemihydrate gypsum yakawanikwa necalcining yekutanga-giredhi dihydrate gypsum nekuchena kunodarika 90% kana iyo α-mhando hemihydrate gypsum inowanikwa ne autoclaving kana hydrothermal synthesis.

Active admixture: self-leveling zvinhu zvinogona kushandisa nhunzi ash, slag poda, etc. seanoshanda admixtures, chinangwa ndechekuvandudza particle gradation yezvinyorwa uye kuvandudza kushanda kwezvinhu zvakaoma muviri. Slag poda inopinda hydration reaction mune alkaline nharaunda, iyo inogona kuvandudza compactness uye gare gare kusimba kwechimiro chechinhu.

Early-simba cementitious zvinhu: Kuti ive nechokwadi chekuti nguva yekuvaka, yekuzvimisa-leveling zvinhu zvine zvimwe zvinodiwa zvekutanga simba (kunyanya 24h flexural uye compressive simba). Iyo sulphoaluminate simenti inoshandiswa seyekutanga-kusimba simende zvinhu. Iyo sulphoaluminate simenti ine kukurumidza hydration kumhanya uye yakakwirira yekutanga simba, iyo inogona kusangana nezvinodiwa zvekusimba kwekutanga kwechinhu.

Alkaline activator: Iyo gypsum composite cementitious zvinhu ine yakanyanya mhedziso yakaoma yakaoma pasi pezvine mwero alkaline mamiriro. Quicklime uye 32.5 simende inogona kushandiswa kugadzirisa pH kukosha kuti ipe alkaline nharaunda ye hydration yesimende zvinhu.

Coagulant: Iyo nguva yekumisikidza indekisi yakakosha yekuita indekisi yezvinhu zvekuzvimiririra. Nguva pfupi kana yakarebesa haikodzeri kuvaka. Iyo coagulant inomutsa chiitiko chegypsum, inomhanyisa iyo supersaturated crystallization kumhanya ye dihydrate gypsum, inopfupisa nguva yekumisikidza, uye inochengeta kuseta uye kuomesa nguva yezvinhu zvekuzvimisa mukati meiyo inonzwisisika renji.

Mvura inoderedza mumiriri: Kuti uvandudze kusimba uye kusimba kwezvinhu zvinozvimisa, zvinodikanwa kudzikisira reshiyo yemvura-binder. Pasi pemamiriro ekuchengetedza mvura yakanaka yezvinhu zvekuzvimisa-leveling, zvakakosha kuwedzera vamiririri vanoderedza mvura. Iyo naphthalene-based water reducer inoshandiswa, uye nzira yayo yekudzikisa mvura ndeyokuti boka re sulfonate mu naphthalene-based water-reducer molecule uye mvura molecule inosanganiswa ne hydrogen bonds, ichiita firimu yakagadzikana yemvura pamusoro peiyo gelled. zvinhu, zvichiita kuti zvive nyore kugadzira mvura pakati pezvinhu zvimedu. Sliding, nokudaro kuderedza kuwanda kwekusanganiswa kwemvura kunodiwa uye kuvandudza chimiro chemuviri wakaoma wezvinhu.

Mvura inochengetedza mumiriri: zvinhu zvekuzvimiririra zvinovakwa pahwaro hwepasi, uye ukobvu hwekuvaka hwakatetepa, uye mvura inonyudzwa nyore nepasi, zvichikonzera kusakwana kwemvura yezvinhu, kuputika pamusoro, uye kuderedzwa. simba. Muyedzo iyi, methyl cellulose (MC) yakasarudzwa semumiriri wekuchengetedza mvura. MC ine mvura yakanaka yekunyorova, kuchengetwa kwemvura uye firimu-kugadzira zvivakwa, kuitira kuti iyo yekuzvimisa-leveling irege kubuda ropa uye yakazara hydrated.

Redispersible latex poda (inozonzi latex poda): latex poda inogona kuwedzera elastic modulus yezvinhu zvekuzvimisa-leveling, kunatsiridza kuputika kwekudzivirira, kusimba kwebhondi uye kuramba kwemvura.

Defoamer: Iyo defoamer inogona kuvandudza zvinhu zvinooneka zveiyo-yega-leveling zvinhu, kuderedza mabhubhu kana iyo chinhu ichiumbwa, uye ine imwe mhedzisiro pakuvandudza simba rezvinhu.