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?Iyi inotevera sumo kune iyo huru yezvinyorwa zvehupfu hwakaoma dhaka zvinowedzera zvakaunzwa naJianshe Net kuti zvitariswe.
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?
EVA copolymerinogona 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 kweadhispersible latex poda mune 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 makobvu inonyanya kusanganisira cellulose ethers, starch ethers, etc. Iyo cellulose ether inoshandiswa muvhu rakaoma dhaka rinonyanya methyl hydroxyethyl cellulose ether (MHEC) uyehydroxypropyl methyl cellulose ether(HPMC).
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 is super Plasticizer ine mashandiro akanaka, kunyanya kune yakaonda dhaka redhaka, asi nekuti chigadzirwa chemusikirwo, 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.Accelerators anoshandiswa kukurumidzira kuseta uye kuoma kwedhaka, Calcium formate uye Lithium carbonate anoshandiswa zvakanyanya, uye Aluminate uye Sodium metasilicate inogona zvakare kushandiswa seanomhanyisa.Retarders anoshandiswa kunonotsa kugadzika uye kuoma kwedhaka.Tartaric acid, citric acid nemunyu wayo uye Gluconic acid zvakashandiswa zvinobudirira.
Waterproof agent
Mvura inodzivirira mvura inonyanya kusanganisira: Iron(III) chloride, organic silane compound, fatty acid salt, polypropylene fiber, Styrene-butadiene uye mamwe macromolecular compounds.Iron(III) chloride isingapindi mvura mumiririri ine yakanaka kusapinda mvura, asi zviri nyore kukonzera ngura yekusimbisa 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.The Unit mutengo wezvigadzirwa izvi wakadzikira, asi zvinotora nguva yakareba kusanganisa dhaka zvakaenzana nemvura.
Mafiibha anoshandiswa paupfu hwakaoma dhaka anosanganisira alkali resistant glass fiber, polyethylene fiber (polypropylene fiber), high-simba uye high modulus polyvinyl alcohol fiber (polyvinyl alcohol fiber), huni fiber, nezvimwewo. high modulus polyvinyl doro 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.
Nguva yekutumira: Jul-14-2023