Dry powder mortar zvinoreva zvinhu zvakaumbwa ne granular kana kuti powdery zvinoumbwa nekusanganiswa kwe aggregates, inorganic cementitious materials, uye zvimwe zvinowedzerwa zvakaomeswa uye zvakaongororwa muchikamu chakati. Ndezvipi zvinowedzerwa zvinowanzoshandiswa pa dry powder mortar? Dry powder mortar inowanzo shandisa Portland cement sechinhu chinosimbisa, uye huwandu hwezvinhu zvinosimbisa hunowanzoita 20% kusvika 40% ye dry powder mortar; Mazhinji e fine aggregates i quartz jecha uye anoda huwandu hwakawanda hwe pre-treatment senge kuomesa nekuongorora kuti saizi ye particles yavo uye mhando zvinosangana nezvinodiwa zve formula; Dzimwe nguva fly ash, slag powder, nezvimwewo zvinowedzerwawo se admixtures; Admixtures dzinowanzo shandiswa muhuwandu hudiki, kubva pa1% kusvika 3%, asi dzine mhedzisiro yakakosha. Dzinowanzo sarudzwa zvichienderana nezvinodiwa zve product formula kuti dzivandudze kushanda, layering, strenkage, uye frost resistance ye mortar.
Ndedzipi mhando dzezvinhu zvinoshandiswa pakugadzira dhaka reupfu hwakaoma (dry powder mortar)?
Upfu hwelatex hunonyungudika zvakare
Upfu hwelatex hunonyungudika hunogona kuvandudza zvinotevera mudhaka reupfu hwakaoma:
① Kuchengetedzwa kwemvura uye kugona kushanda kwedhaka richangobva kusanganiswa;
② Kubatana kwezvikamu zvakasiyana zvehwaro;
③ Kuchinjika uye kushanduka kwechinhu chinogadzirwa nedhaka;
④ Simba rinokombama uye kubatana;
⑤ Kusapfeka zvakanaka;
⑥ Kutsungirira;
⑦ Kukwana (kusapinda).
Kushandiswa kweupfu hwelatex hunonyungudikamupurasitiki yakatetepa, ceramic tile binder, system yekudzivirira madziro ekunze, uye zvinhu zvepasi zvinozvienzanisa zvakaratidza mhedzisiro yakanaka.
Chinhu chinochengetedza mvura uye chinoita kuti ikure
Zvinonyanya kuchengetedza mvura zvinosanganisiraethers dze cellulose, starch ethers, nezvimwewo. Cellulose ether inoshandiswa mu dry powder mortar inonyanya kushandiswa ne methyl hydroxyethyl cellulose ether (MHEC) uye hydroxypropyl methyl cellulose ether (HPMC).
Mushonga wekuderedza mvura
Basa guru rezvinhu zvinoderedza mvura nderekuderedza kudiwa kwemvura mudhaka, nokudaro zvichivandudza simba rayo rekudzvanya. Zvinhu zvikuru zvinoderedza mvura zvinoshandiswa mudhaka rakaoma zvinosanganisira casein, chinhu chinoderedza mvura chakavakirwa pa naphthalene, melamine formaldehyde condensate, uye polycarboxylic acid. Casein ipurasitiki yakanaka kwazvo, kunyanya kune dhaka rakatetepa, asi nekuda kwehunhu hwayo hwechisikigo, mhando yayo nemutengo wayo zvinowanzochinja-chinja. Zvinhu zvinoderedza mvura zveNaphthalene series zvinowanzo shandiswa β- Naphthalenesulfonic acid formaldehyde condensate.
Chinovhara ropa
Kune mhando mbiri dzemacoagulants: accelerator neretarder. Zvinowedzera simba zvinoshandiswa kukurumidzisa kugadzika nekusimba kwemortar, uye calcium formate ne lithium carbonate zvinoshandiswa zvakanyanya. Aluminate ne sodium silicate zvinogonawo kushandiswa sezvinhu zvinowedzera simba. Iyo retarder inoshandiswa kunonotsa kugadzika nekusimba kwemortar, uye tartaric acid, citric acid nemunyu wayo, pamwe negluconate zvakashandiswa zvinobudirira.
Mushonga usingapindi mvura
Zvinhu zvinodzivirira mvura zvinonyanya kusanganisira polymer compounds dzakadai se iron chloride, organic silane compounds, fatty acid salts, polypropylene fibers, uye styrene butadiene rabha. Iron chloride mvura inochengetedza mvura ine simba rakanaka rekudzivirira mvura, asi inokurumidza kukora simbi nesimbi dzakaiswa mukati. Calcium salts isinganyunguduke inogadzirwa nekuita kwe fatty acid salts ine calcium ions muchikamu chesimende inoisa pamadziro e capillaries, ichitamba basa rekuvhara maburi uye kuita kuti madziro e capillary tube aya ave hydrophobic surfaces, nokudaro ichitamba basa rekudzivirira mvura. Mutengo weyuniti yezvigadzirwa izvi wakaderera, asi zvinotora nguva yakareba kusanganisa mortar zvakaenzana nemvura.
faibha
Mafaibha anoshandiswa kugadzira dhaka reupfu hwakaoma anosanganisira faibha yegirazi isingapindi alkali, faibha yepolyethylene (polypropylene fiber), faibha yepolyvinyl alcohol yakasimba uye ine modulus yakawanda (polyvinyl alcohol fiber),faibha yehuni, nezvimwewo. Dzinonyanya kushandiswa idzo fibers dzepolyvinyl alcohol dzakasimba uye dzakasimba uye dzakasimba. Fibers dzepolyvinyl alcohol dzakasimba uye dzakasimba dzine mashandiro ari nani uye mutengo wakaderera pane fibers dzepolypropylene dzinobva kunze kwenyika. Fibers dzinopararira zvisina kurongeka uye zvakaenzana mu simende, uye dzinobatana zvakanyanya nesimende kudzivirira kuumbwa uye kukura kwe microcracks, zvichiita kuti mortar matrix ive yakakora, uye nokudaro ine mashandiro emvura uye inodzivirira kupwanyika zvakanaka. Kureba kwayo i3-19 mm.
Mudzivisi weDefoamer
Parizvino, ma "powder defoamers" anoshandiswa mu dry powder mortar anonyanya kuve ma "polyols" nema "polysiloxanes". Kushandiswa kwema "defoamers" hakungogadzirisi chete huwandu hwemabubbles, asiwo kuderedza shrinkage. Mukushanda kwakakodzera, kuti kuvandudza mashandiro akazara, ma "additives" akawanda anofanira kushandiswa panguva imwe chete. Panguva ino, zvakakosha kutarisisa simba riripo pakati pe "multiple additives". Pamusoro pezvo, zvakakoshawo kutarisisa huwandu hwe "additives" dzinowedzerwa. Zvishoma kwazvo kuti zviratidze mhedzisiro ye "additives"; Zvakawandisa, panogona kuva nemigumisiro yakaipa.
Nguva yekutumira: Nyamavhuvhu-29-2023