Dry powder mortar inoreva chinhu chegranular kana chehupfu chinoumbwa nekusanganiswa kwemuviri kweaggregates, inorganic cementitious zvinhu, uye zvekuwedzera zvakaomeswa nekuongororwa mune imwe chikamu.Ndeapi anowanzo shandiswa additives for dry powder mortar?Dry poda dhaka rinowanzoshandisa Portland simende sesimende zvinhu, uye huwandu hwesimende hunowanzo verengera 20% kusvika 40% yehupfu yakaoma;Mazhinji akakwenenzverwa aggregates ijecha requartz uye inoda kuwanda kwekutanga kurapwa kwakadai sekuomesa uye kuongorora kuti ive nechokwadi chekuti saizi yavo yemhando uye hunhu zvinosangana nezvinodiwa zvefomula;Dzimwe nguva madota anobhururuka, slag poda, nezvimwewo zvinowedzerwa semisanganiswa;Admixtures anowanzo shandiswa muzvikamu zvidiki, kubva pa1% kusvika 3%, asi zvine mhedzisiro yakakosha.Ivo vanowanzo sarudzwa zvinoenderana nezvinodiwa zvechigadzirwa fomula yekuvandudza kushanda, layering, simba, shrinkage, uye chando kuramba kwedhaka.
Ndeapi marudzi anowanzoshandiswa ehupfu hwakaoma dhaka additives?
Redispersible latex poda
Redispersible latex poda inogona kuvandudza zvinotevera zvivakwa muvhu rakaoma dhaka:
① Kuchengetwa kwemvura uye kushanda kwedhaka richangobva kusanganiswa;
② Kuita kwekubatanidza kwezvikamu zvakasiyana-siyana;
③ Iko kushanduka uye deformation kuita kwedhaka;
④ Kupeta simba uye kubatana;
⑤ Pfeka kuramba;
⑥ Resilience;
⑦ Compactness (kusapindirana).
Kushandiswa kweredispersible latex podamune yakatetepa layer yekupurasita dhaka, ceramic tile binder, yekunze madziro ekudzivirira system, uye yekuzvigadzika pasi zvinhu zvakaratidza mhedzisiro yakanaka.
Mvura inochengetedza uye thickening agent
Mvura inochengetedza thickeners inonyanya kusanganisiracellulose ethers, starch ethers, etc. Iyo cellulose ether inoshandiswa muvhu rakaoma dhaka rinonyanya methyl hydroxyethyl cellulose ether (MHECuye hydroxypropyl methyl cellulose ether (HPMC).
Mvura inoderedza mumiririri
Basa rekutanga remvura yekudzikisa maajenti kudzikisa kudiwa kwemvura kwedhaka, nekudaro ichivandudza simba rayo rekumanikidza.Iwo makuru ekudzikisa mvura anoshandiswa muvhu rakaoma dhaka anosanganisira casein, naphthalene yakavakirwa mvura yekudzikisa mumiririri, melamine formaldehyde condensate, uye polycarboxylic acid.Casein yakanakisa superplasticizer, kunyanya kune yakaonda layer dhaka, asi nekuda kwechimiro chayo, mhando yayo uye mutengo unowanzo chinja.Naphthalene yakatevedzana mvura yekudzikisa maajenti inowanzoshandiswa β-Naphthalenesulfonic acid formaldehyde condensate.
Coagulant
Kune marudzi maviri e coagulants: accelerator uye retarder.Accelerating agents anoshandiswa kukurumidzira kuseta uye kuoma kwedhaka, uye calcium formate uye lithium carbonate zvinoshandiswa zvakanyanya.Aluminate uye sodium silicate inogona zvakare kushandiswa seanomhanyisa vamiririri.Iyo retarder inoshandiswa kunonoka kugadzirisa uye kuoma kwedhaka, uye tartaric acid, citric acid nemunyu wayo, pamwe negluconate zvakabudirira kushandiswa.
Waterproof agent
Mishonga yekudzivirira mvura inonyanya zvinosanganisira mapolymer compounds akadai se iron chloride, organic silane compounds, fatty acid salts, polypropylene fibers, uye styrene butadiene rabha.Iron chloride inodzivirira mvura ine yakanaka yekudzivirira mvura, asi inongoita ngura yesimbi mbariro uye simbi dzakaiswa zvikamu.Iyo insoluble karusiyamu munyu inogadzirwa nekuita kwemafuta asidhi munyu ane calcium ions muchikamu chesimende dhipoziti pamadziro e capillaries, ichiita basa mukuvharira pores uye kuita aya capillary chubhu madziro kuve hydrophobic nzvimbo, nekudaro ichiita basa rekusapinda mvura.Mari yeyuniti yezvigadzirwa izvi yakaderera, asi zvinotora nguva yakareba kusanganisa dhaka zvakaenzana nemvura.
fiber
Mafiibha anoshandiswa kugadzira poda yakaoma dhaka anosanganisira alkali resistant glass fiber, polyethylene faibha (polypropylene faibha), yakakwirira-simba uye yakakwirira modulus polyvinyl doro fiber (polyvinyl doro fiber),huni fiber, etc. Inonyanya kushandiswa ndiyo yakakwirira-simba uye yakakwirira modulus polyvinyl alcohol fibers uye polypropylene fibers.Simba repamusoro uye yakakwira modulus polyvinyl doro fibers ine kuita zvirinani uye mutengo wakaderera pane inounzwa kunze polypropylene fibers.Fibers dzakagovaniswa zvisina tsarukano uye zvakafanana dzakagovaniswa mune simende matrix, uye padhuze chisungo nesemende kudzivirira kuumbwa uye kuvandudzwa kwema microcracks, zvichiita kuti matrix edhaka ive yakaoma, uye nekudaro kuve nekuita kusapinda kwemvura uye yakanakisa kukanganisa uye kupaza kuramba.Kureba ndeye 3-19 mm.
Defoamer
Parizvino, iyo poda defoamers inoshandiswa muvhu rakaoma dhaka inonyanya kuve polyols uye polysiloxanes.Iko kushandiswa kwe defoamers haingogadzirise iyo bubble yemukati, asi zvakare kuderedza shrinkage.Mumashandisirwo anoshanda, kuti uvandudze mashandiro akazara, akawanda ekuwedzera anofanirwa kushandiswa panguva imwe chete.Panguva ino, zvakakosha kubhadhara kune kuwirirana pakati pezvinowedzera zvakasiyana-siyana.Mukuwedzera, inofanirwawo kubhadhara kune huwandu hwekuwedzera kwakawedzerwa.Kunyanya kushoma kuratidza mhedzisiro yezvinowedzera;Kunyanya, panogona kuva nemigumisiro yakaipa.
Nguva yekutumira: Aug-29-2023