1. Hunhu hwekutanga hweMHEC
MHEC (Methyl Hydroxyethyl Cellulose)isimbi isina ionic cellulose ether ine kukora kwakanaka, kuchengetedza mvura, kuumbwa kwefirimu uye kushanda zvakanaka kwekuvaka. Muzvinhu zvekuvaka zvakagadzirwa nesimende, MHEC inogona kuvandudza kuyerera kwemvura, kuchengetedza mvura, kudzivirira delamination uye kunamira kwesimbi, uye inoshandiswa zvakanyanya mu tile adhesive, putty powder, self-leveling mortar, waterproof mortar uye permeable cement mortar. Nekuda kwekusashanda kwayo pakuita hydration yesimende uye kuenderana nemhando dzakasiyana dze admixtures, MHEC yave chinhu chakakosha chekugadzirisa organic yesimbi yesimbi yesimbi inopenya.
2. Hunhu hwedhaka resimende rinopindika
Dura resimende rinopinda mvura zvinoreva dura rakakosha rinogona kupinda muchimiro chepasi kuburikidza nekushanda kwe capillary, uye rinowanzoshandiswa mukugadzira chivakwa, kusimbisa uye kudzivirira mvura. Rudzi urwu rwedura runodiwa kuti ruve ne:
Kupinda zvakanaka kwemvura: kukwanisa kupinda muma micro-pores e base layer uye kuvandudza density ye base material;
Kuyerera kwakanyanya: kuyerera zvakanaka uye kupinda kwemvura pasina kubuda ropa kwakanyanya uye kupatsanurwa;
Kunamatira kwakasimba uye kugara kwenguva refu: simbisa kubatana kwakasimba nezvinhu zvepasi uye unoita basa rekusimbisa chimiro kwenguva refu uye rekudzivirira;
Kuchengetedza mvura zvine mwero: kuderedza kurasikirwa nemvura nekukurumidza panguva yekuvaka uye kuve nechokwadi chekuti simende yanyoroveswa zvakakwana.
Basa reMHEC rinonyanya kutarisa pakuvandudza kuyerera kwemvura, kuchengetwa kwemvura uye mashandiro ekuvaka kwemota, ukuwo richivandudza zvisina kunanga mhedzisiro yekupinda kwayo.
3. Mhedzisiro yeMHEC pakushanda kwemota yesimende inopindika
3.1. Kuvandudza kuchengetwa kwemvura uye kukurudzira kudzika kwemvura
Dura rinopinda mvura rinofanira kuchengetedza kuenzana kwakakodzera uye hunyoro hwakakodzera risati rapinda mumaburi emugero wepasi. MHEC ine mvura inochengetwa zvakanaka, iyo inogona kuderedza kupwanyika nekukurumidza kwemvura yakasununguka uye kunyudzwa nezvinhu zvepasi panguva yekuvaka dura, kuwedzera nguva yekupinda kwedura, uye kuwedzera kudzika kwekupinda. Pamusoro pezvo, kugoverwa kwemvura kwakafanana kunobatsirawo kuti zvidimbu zvesimende zviwane mvura yakakwana muchikamu chekupedzisira, zvichivandudza huwandu uye kugara kwenguva refu.
3.2. Kuvandudza kuyerera uye mashandiro ekuvaka
MHEC inogona kugadzirisa hunhu hwe rheological hwe smear ye simende inopindika, kuitira kuti igone kuchengetedza kuyerera kwakanaka kwekuvaka pasi pemamiriro emvura-simende yakaderera. Kuwedzera kwakakodzera kweMHEC kunogona kuderedza kubuda ropa nekuparadzaniswa kwesmear, uye kuve nechokwadi chekuti slurry inopinda zvakaenzana mumaburi madiki e substrate. Kune smear inopindika inoda kudururwa kana kupfapfaidzwa, MHEC inogona kuvandudza mashandiro ekupomba uye kuenzana, zvichiita kuti smear ive nyore kuvaka.
3.3. Kuvandudza kunamira pakati pedhaka ne substrate
Nekuda kwehunhu hweMHEC hwekugadzira firimu, firimu reorganic rinochinjika rinogona kugadzirwa panzvimbo inopindirana panguva yekuoma kwedhaka, izvo zvinowedzera kuruma nekunamatira pakati pedhaka ne substrate. Kugadzirisa uku kunobatsira kudzivirira dhaka kubva pa substrate uye kunovandudza kugara kwenguva refu kwechikamu chinogadziriswa chinopinda mvura.
3.4. Kuvandudza kuramba kutsemuka uye kudzora kuderera kwesimba
Nekuda kwekuwedzera kwehuwandu hwemukati, dhaka rinopinda mumvura rinogona kupwanyika panguva yekuoma. MHEC inogona kuchengetedza mvura inogona kuderedza mwero wekupwanyika kwedhaka, kuita kuti mvura yesimende ikwane, uye kuderedza mukana wekupwanyika kwepurasitiki. Panguva imwe chete, hunhu hweMHEC hwekugadzira firimu hunoita kuti dhaka rive nyore, zvichivandudza kuramba kwekuputika uye kugara kwenguva refu.
3.5. Kunonotsa nguva yekutanga yekugadzirisa zvinhu kunobatsira pakuvaka
MHEC ine mhedzisiro inononoka zvishoma pakunyorovesa simende, izvo zvinobatsira kuwedzera nguva yekushanda kwemota. Kune mapurojekiti ekugadzirisa anoda kupinda mukati memota zvizere, nguva yakareba yekuvaka inoita kuti zvive nyore kuti slurry ipinde muchikamu chepasi, zvichivandudza mhedzisiro yekugadzirisa uye kugadzikana kwemhando.
3.6. Kuvandudza mashandiro ekudzivirira kunyura kwemvura uye kudzivirira mvura kupinda mumvura
Mudhaka rakaomeswa rinopinda mumvura, sezvo MHEC ichivandudza huwandu hwedhaka uye kubatana kwaro, chimiro charo che capillary chakafanana, porosity inoderedzwa, uye kugona kwaro kudzivirira kunyura kwemvura kunovandudzwa zvakanyanya. Mukudzivirira mvura pasi pevhu, tunnel lining, reservoir nemamwe mapurojekiti, dhaka rinopinda mumvura rakagadziriswa neMHEC rinogona kudzivirira kufamba kwemvura uye kuwedzera simba remvura.
4. Huwandu hwekuwedzera uye matanho ekudzivirira pakushandisa
Huwandu hunokurudzirwa hwekuwedzera: kazhinji 0.2% kusvika 0.6% yehuremu hwechinhu chinosimbisa simende, icho chinoda kugadziriswa zvichienderana nehuwandu hwemvura nesimende, kuyerera kwemota uye maitiro ekuvaka.
Dzivisa kuwedzera zvakanyanya: Kuwedzerwa kweMHEC zvakanyanya kunogona kukonzera kusimba kwakanyanya kwemortar, kudzikira kwemvura, uye kunogona kunonoka kuomeswa kwesimende zvakanyanya.
Kuenderana nezvimwe zvinhu zvakasanganiswa: Mumamortar anopindika ane zvinhu zvinoderedza mvura, zvinhu zvinopinza mhepo kana zvinhu zvinowedzera simba, chiyero chakakodzera cheMHEC chinofanira kusarudzwa nekuyedza kuti pave nechokwadi chekuti kushanda kwacho kunoshanda pamwe chete.
Mumortar yesimende inopindika, MHEC inovandudza zvikuru kudzika kwekupinda, kunamira, kuramba kutsemuka uye kugara kwenguva refu kwemortar kuburikidza nekuchengetedza kwayo mvura, kukora, kugadzira mafirimu uye kugadzirisa rheological. Panguva imwe chete, inovandudza kushanda kwekuvaka, inowedzera nguva yekuvaka, uye inovandudza mhando yese yemapurojekiti ekugadzirisa nekudzivirira. Kusarudzwa kwakanaka uye kudzora huwandu hwekuwedzera hwemortar.MHEC ndiyo kiyi yekuwana kushanda kwepamusoro kwemota yesimbi inoyerera.
Nguva yekutumira: Chikunguru-21-2025