Pfupiso:Mhedzisiro yehuwandu hwakasiyana hwehydroxypropyl methylcellulose ether pahunhu hwemortar yakasanganiswa yakaoma yakasanganiswa yakadzidzwa. Zvakabuda zvakaratidza kuti: nekuwedzera kwehuwandu hwemortar yakasanganiswa yakaoma, kuenzana kwayo nehukuru hwayo zvakaderera, uye nguva yekuiswa kwayo yakaderera. Kuwedzerwa, simba rekumanikidza re7d ne28d rakaderera, asi mashandiro ese emortar yakasanganiswa yakaoma akavandudzwa.
0. Nhanganyaya
Muna 2007, mahurumende matanhatu nemakomisheni enyika akaburitsa "Chiziviso chekurambidza kusanganiswa kwevhu panzvimbo mune mamwe maguta mukati menguva yakatarwa". Parizvino, maguta zana nemakumi maviri nemanomwe munyika yese akaita basa re "kurambidza kushandiswa kwevhu riripo", izvo zvakaunza budiriro isingaenzaniswi mukugadzirwa kwevhu rakasanganiswa nemvura. Nekuvandudzwa kwakasimba kwevhu rakasanganiswa nemvura mumisika yekuvaka yemuno neyekunze, vhu rakasanganiswa nemvura rakasanganiswa nemvura rakapindawo muindasitiri iyi iri kubuda, asi mamwe makambani ekugadzira nekutengesa vhu rakasanganiswa nemvura anowedzera nemaune kushanda kwezvigadzirwa zvavo, achitsausa indasitiri yevhu rakasanganiswa nemvura. Parizvino, sevhu rakasanganiswa nekongiri, vhu rakasanganiswa nemvura rakasanganiswa nemvura rinonyanya kushandiswa pamwe chete, uye shoma dzinoshandiswa dzega. Zvikuru, kune mhando dzakawanda dzezvinhu zvinosanganiswa mumidziyo yesimbi inoshanda, asi mumidziyo yesimbi yakasanganiswa yakaoma, hapana chikonzero chekutsvaga huwandu hwezvinhu zvinosanganiswa, asi kutarisisa kunofanira kupihwa pakugona kwayo kushanda uye kushanda kwayo, kudzivirira kushandiswa zvakanyanya kwemidziyo yesimbi, zvichikonzera marara asina kufanira, uye zvichitokanganisa mhando yeprojekiti. Mumidziyo yesimbi yakasanganiswa yakaoma, cellulose ether inoita basa rekuchengetedza mvura, kukora, uye kuvandudza mashandiro ekuvaka. Kushanda zvakanaka kwekuchengetedza mvura kunoita kuti midziyo yesimbi yakasanganiswa yakaoma isakonzerese kupwanywa, kuputswa uye kudzikiswa kwesimba nekuda kwekushomeka kwemvura uye hydration isina kukwana yesimende; kukora kwayo kunowedzera simba rekuvaka kwemidziyo yesimbi yakanyorova. Pepa iri rinoita chidzidzo chakarongeka pamusoro pekushandiswa kwe cellulose ether mumidziyo yesimbi yakasanganiswa yakaoma, iyo ine kukosha kwekushandisa michina yesimbi zvine musoro mumidziyo yesimbi yakasanganiswa yakaoma.
1. Zvinhu zvisina kugadzirwa uye nzira dzakashandiswa mukuyedza
1.1 Zvinhu zvisina kugadzirwa zvebvunzo
Simende yacho yaive simende yeP. 042.5, ash inobhururuka idota reClass II kubva kumagetsi emagetsi muTaiyuan, fine aggregate ijecha rerwizi rakaomeswa rine saizi ye5 mm kana kupfuura rakaseferwa, fineness modulus i2.6, uye cellulose ether inowanikwa mukutengesa hydroxypropyl methyl cellulose ether (viscosity 12000 MPa·s).
1.2 Nzira yekuyedza
Kugadzirira sampuro uye kuyedzwa kwekushanda kwakaitwa zvichienderana nenzira yeJCJ/T 70-2009 yekuedza kushanda kwekuvaka dhaka.
2. Chirongwa chebvunzo
2.1 Fomura yebvunzo
Mukuyedza uku, huwandu hwechinhu chimwe nechimwe chisina kugadzirwa chetani imwe chete yedhaka rekupurasita rakaoma rinoshandiswa senzira yekutanga yekuyedza, uye mvura inoshandiswa nemvura yetani imwe chete yedhaka rakaoma.
2.2 Hurongwa hwakananga
Uchishandisa fomura iyi, huwandu hwehydroxypropyl methylcellulose ether inowedzerwa kune tani yega yega ye dry-mixed plastering mortar ndeye: 0.0 kg/t, 0.1 kg/t, 0.2 kg/t, 0.3 kg/t, 0.4 kg/tt, 0.6 kg/t, kudzidza mhedzisiro yehuwandu hwakasiyana hwehydroxypropyl methylcellulose ether pakuchengetwa kwemvura, kuenderana, huwandu hunoonekwa, nguva yekugadzika, uye simba rekumanikidza re dry-mixed plastering mortar, kuitira kutungamira dry-mixed plastering. Kushandiswa kwakakodzera kwemortar admixtures kunogona kuona zvakanakira zvemaitiro ari nyore ekugadzira dry-mixed mortar, kuvaka kuri nyore, kuchengetedzwa kwezvakatipoteredza uye kuchengetedza simba.
3. Mhedzisiro yebvunzo nekuongorora
3.1 Mhedzisiro yebvunzo
Mhedzisiro yehuwandu hwakasiyana hwehydroxypropyl methylcellulose ether pakuchengetedza mvura, kuenderana kwayo, huwandu hwayo, nguva yekugadzika, uye simba rekumanikidza remortar yakasanganiswa yakaoma.
3.2 Kuongororwa kwemigumisiro
Zvinogona kuonekwa kubva mumhedzisiro yehuwandu hwakasiyana hwehydroxypropyl methylcellulose ether pakuchengetwa kwemvura, kuenderana, kusimba kwechinhu, nguva yekugadzika, uye simba rekumanikidza remortar yakasanganiswa yakaoma. Nekuwedzera kwehuwandu hwe cellulose ether, mwero wekuchengetedza mvura wemortar yakanyorova uri kuwedzerawo zvishoma nezvishoma, kubva pa86.2% kana hydroxypropyl methyl cellulose isina kusanganiswa, kusvika pa0.6% kana hydroxypropyl methyl cellulose yakasanganiswa. Mwero wekuchengetedza mvura unosvika 96.3%, izvo zvinoratidza kuti mhedzisiro yekuchengetedza mvura yepropyl methyl cellulose ether yakanaka kwazvo; kusimba kunoderera zvishoma nezvishoma pasi pemhedzisiro yekuchengetedza mvura yepropyl methyl cellulose ether (kushandiswa kwemvura patani yemortar hakuchinji panguva yekuyedza); Kuwanda kwechinhu kunoratidza kudzikira, zvichiratidza kuti mhedzisiro yekuchengetedza mvura yepropyl methyl cellulose ether inowedzera huwandu hwemortar yakanyorova uye inoderedza huwandu; Nguva yekugadzika inowedzera zvishoma nezvishoma nekuwedzera kwehuwandu hwehydroxypropyl methyl cellulose ether, uye huwandu hwe. Kana yasvika pa0.4%, inotopfuura kukosha kwakatsanangurwa kwe8h kunodiwa nechiyero, zvichiratidza kuti kushandiswa kwakakodzera kwehydroxypropyl methylcellulose ether kune mhedzisiro yakanaka yekutonga panguva yekushanda kwemota yakanyorova; simba rekumanikidza re7d ne28d raderera (Kana dosage yakakura, kuderera kuri pachena). Izvi zvine chekuita nekuwedzera kwehuwandu hwemota uye kudzikira kwehuwandu hunoonekwa. Kuwedzera kwehydroxypropyl methyl cellulose ether kunogona kugadzira gomba rakavharwa mukati memota yakaomeswa panguva yekugadzika nekusimba kwemota. Micropores inovandudza kugara kwenguva refu kwemota.
4. Kungwarira pakushandisa cellulose ether mudhaka rakasanganiswa rakaoma
1) Kusarudzwa kwezvigadzirwa zve cellulose ether. Kazhinji, kana cellulose ether yakakura, zvinoita kuti irambe ichichengetedza mvura, asi kana viscosity yakakwira, kunyunguduka kwayo kunoderedza, izvo zvinokanganisa simba uye mashandiro ekuvaka kwemortar; kupfava kwe cellulose ether kwakaderera mumortar yakasanganiswa yakaoma. Zvinonzi kana yakapfava, zviri nyore kunyunguduka. Pasi pemuyero mumwe chete, kupfava kwacho kunowedzera, zvinoita kuti kuchengetedza mvura kuve nani.
2) Kusarudzwa kwechiyero che cellulose ether. Kubva pamhedzisiro yebvunzo uye kuongororwa kwemhedzisiro yezviri mu cellulose ether pakushanda kwe dry-mixed plastering mortar, zvinogona kuonekwa kuti kana zviri mu cellulose ether zvakakwirira, zviri nani, zvinofanirwa kutariswa kubva pamutengo wekugadzira, mhando yechigadzirwa, mashandiro ekuvaka uye mativi mana enzvimbo yekuvaka kuti usarudze zvakakwana chiyero chakakodzera. Chiyero che hydroxypropyl methyl cellulose ether mu dry-mixed mortar yakajairika inokurudzirwa kuva 0.1 kg/t-0.3 kg/t, uye mhedzisiro yekuchengetedza mvura haigone kusangana nezvinodiwa zvakajairwa kana huwandu hwe hydroxypropyl methyl cellulose ether hukawedzerwa muhuwandu hushoma. Tsaona yemhando; chiyero che hydroxypropyl methyl cellulose ether mu dry-resistant plastering mortar chaiyo inenge 3 kg/t.
3) Kushandiswa kwe cellulose ether mudhaka rakajairika rakasanganiswa nemvura. Mukugadzirira dhaka rakajairika rakasanganiswa nemvura, huwandu hwakakodzera hwekusanganiswa hunogona kuwedzerwa, zviri nani nekuchengetedza mvura uye kukora, kuitira kuti igadzire mhedzisiro yekuwedzera simba ne cellulose ether, kuderedza mari yekugadzira, uye kuchengetedza zviwanikwa; kana ikashandiswa yoga Kune cellulose ether, simba rekubatanidza harigone kusangana nezvinodiwa, uye huwandu hwakakodzera hwehupfu hwelatex hunogadziriswazve hunogona kuwedzerwa; nekuda kwehuwandu hushoma hwekusanganiswa kwedhaka, kukanganisa kwekuyera kwakakura kana ikashandiswa yoga. Hunhu hwezvigadzirwa zvedhaka rakaomeswa nemvura.
5. Mhedziso nemazano
1) Mudhaka replastering rakasanganiswa nemvura, nekuwedzera kwehuwandu hwehydroxypropyl methylcellulose ether, mwero wekuchengetedza mvura unogona kusvika 96.3%, kugadzikana uye huwandu hwemvura zvinoderedzwa, uye nguva yekuiswa inowedzerwa. Simba rekumanikidza re28d rakaderera, asi mashandiro ese edhaka rakasanganiswa nemvura akawedzera apo huwandu hwehydroxypropyl methyl cellulose ether hwaive hwakadzikama.
2) Mukugadzirira dhaka rakajairika rakasanganiswa nemvura, cellulose ether ine viscosity yakakodzera uye fineness inofanira kusarudzwa, uye chiyero chayo chinofanira kuongororwa zvakanyanya kuburikidza nekuyedza. Nekuda kwehuwandu hushoma hwedhaka rakasanganiswa nemvura, kukanganisa kwekuyera kwakakura kana ikashandiswa yoga. Zvinokurudzirwa kutanga kuisanganisa nedhiragi, wobva wawedzera huwandu hwekuwedzera kuti uve nechokwadi chekuti zvigadzirwa zvedhaka rakaomeswa nemvura zvakanaka.
3) Dry-mixed mortar iindasitiri iri kusimukira muChina. Mukushandisa mortar admixtures, hatifanirwe kutsvaga huwandu hwezvinhu tisingafungi, asi tinofanira kutarisisa mhando uye kuderedza mari yekugadzira, kukurudzira kushandiswa kwemarara emaindasitiri, uye kuita kuti simba rirambe richishandiswa richengetedzeke uye rideredzwe.
Nguva yekutumira: Kukadzi-22-2023