Cement-based zvinhu zvinoshandiswa zvakanyanya mukuvaka, migwagwa, mabhiriji, tunnel uye mamwe mapurojekiti. Nekuda kwekuwanda kwemidziyo yavo, mutengo wakaderera uye kuvaka kuri nyore, zvave zvekuvakisa zvakakosha. Nekudaro, simende-yakavakirwa zvinhu zvakare inotarisana nemamwe matambudziko mukushandisa zvinoshanda, senge yakaderera crack resistance, kusamira zvakanaka kwemvura uye zvinodikanwa zvakanyanya zvekuyerera kwesamende paste panguva yekuvaka. Kuti vagadzirise matambudziko aya, vaongorori vanga vachiedza kubatanidza zvinhu zvakasiyana-siyana zvepolymer mune simende-based zvinhu kuti vavandudze mashandiro avo.Hydroxypropyl methylcellulose (HPMC), sechinhu chinowanzo shandiswa mvura-soluble polymer material, yakashandiswa zvakanyanya kuvandudza zvinhu zvakasiyana-siyana zvesimende-based materials nekuda kwezvakanaka rheological properties, thickening effect, kuchengetedza mvura uye kudzivisa mvura.
1. Zvinhu zvakakosha zvehydroxypropyl methylcellulose
KimaCell®Hydroxypropyl methylcellulose musanganiswa wepolymer unowanikwa nekugadziriswa kwemakemikari echisikigo cellulose, nekunyungudika kwemvura kwakanaka, kukora, kuchengetedza mvura uye kugadzikana kwakanyanya. Inogona kugadzirisa viscosity, fluidity uye anti-segregation yesimende-yakavakirwa zvinhu, uye zvakare ine kumwe kupenya kwemhepo, anti-kusvibiswa uye anti-kuchembera zvivakwa. HPMC inowanzoshandiswa mukuvaka zvinhu zvakaita sedhaka, simende zvinhu, dhaka rakaoma, uye machira, uye inoita basa rakakosha mukugadzirisa rheological zvimiro zvesimende-based zvinhu.
2. Kuvandudza rheological properties ye simenti-based materials ne hydroxypropyl methylcellulose.
Iyo rheological zvimiro zvesimende-zvakavakirwa zvinhu zvakakosha pakuita kwekuvaka, kunyanya mukuita kwekupomba, kuvaka, uye kuvhara pamusoro. Yakanaka rheological zvivakwa zvinogona kuvandudza kushanda kwekuvaka uye kuve nechokwadi chekuvaka mhando. Kuwedzerwa kweHPMC kunogona kunyatso kuvandudza fluidity yesimende-yakavakirwa zvinhu. Kunyanya, HPMC inowedzera viscosity yesamende paste, zvichiita kuti musanganiswa ugadzikane uye kuderedza kuitika kwekuparadzanisa. Pasi pemvura yakadzika-simende reshiyo mamiriro, HPMC inogona zvinobudirira kuvandudza kushanda kwekongiri uye dhaka, ichiita kuti ive nani fluidity, uku ichidzikisawo evaporation rate yechinhu uye kurebesa nguva yekuvaka.
3. Kuvandudzwa kwekupikiswa kwekutsemuka kwesement-based materials neHPMC
Cement-based zvinhu zvinowanzoitika kutsemuka panguva yekuomeswa kwemaitiro, kunyanya nekuda kwezvinhu zvakaita sekuomesa shrinkage, shanduko yekushisa, uye mitoro yekunze. Kuwedzerwa kweHPMC kunogona kunyatso kuvandudza kutsemuka kwekupokana kwesimende-yakavakirwa zvinhu. Izvi zvinonyanya kukonzerwa nekuchengetwa kwemvura kwakanaka uye kukora kweHPMC. Kana HPMC yawedzerwa kune simende-yakavakirwa zvinhu, inogona kunyatso kudzikisa kubuda kwemvura uye kudzikamisa kuoma kwekumhanya kwesamende paste, nekudaro ichidzikisa shrinkage kutsemuka kunokonzerwa nekuwedzeredza kwemvura. Uye zvakare, HPMC inogona zvakare kuvandudza chimiro chemukati chesimende-yakavakirwa zvinhu, kuwedzera kuoma kwavo uye kutsemuka kuramba.
4. Kuvandudza kudzivirira kwemvura uye kusimba kwesement-based materials
Kuramba kwemvura uye kusimba kwesimende-yakavakirwa zvinhu chimwe chezviratidzo zvakakosha zvekushandisa kwavo muzvirongwa zvekuvaka. Seyakakwira molecular polymer, HPMC inogona kuvandudza kudzivirira kwemvura kwesimende-yakavakirwa zvinhu. HPMC mamorekuru ane hydrophilicity yakasimba uye anogona kugadzira yakagadzikana hydration layer mune simende paste kuderedza kupinda kwemvura. Panguva imwecheteyo, KimaCell®HPMC inogona zvakare kukwidziridza microstructure yesimende-yakavakirwa zvinhu, kuderedza porosity, uye nekudaro kunatsiridza anti-permeability uye kuramba mvura. Mune dzimwe nharaunda dzakakosha, senge nharaunda dzine hunyoro kana kusangana kwenguva refu nemvura, kushandiswa kweHPMC kunogona kuvandudza zvakanyanya kusimba kwesimende-yakavakirwa zvinhu.
5. HPMC thickening effect pane simenti-based materials
Iko kukora mhedzisiro yeHPMC pane simende-yakavakirwa zvinhu chimwe chezvinhu zvakakosha zvekushandisa kwayo kwakakura. Mune simende paste, HPMC inogona kuumba matatu-dimensional network dhizaini kuburikidza nekuchinja kweiyo molecular chimiro, nekudaro ichiwedzera zvakanyanya viscosity yenamira. Iyi yekukora mhedzisiro haigone kungoita kuti simende-yakavakirwa zvinhu zvigadzikane panguva yekuvaka uye kudzivirira kupatsanurwa kwesamende paste, asi zvakare kunatsiridza iyo coating maitiro epaste uye kutsetseka kwenzvimbo yekuvaka kusvika pamwero wakati. Kune dhaka uye zvimwe simende-zvakavakirwa zvinhu, iyo thickening mhedzisiro yeHPMC inogona kunyatso kuvandudza kushanda uye kuchinjika kwezvinhu.
6. HPMC inovandudza kushanda kwese kwesement-based materials
The comprehensive effect ofHPMCmune sement-based materials, kunyanya iyo synergistic effect mu fluidity, crack resistance, kuchengetedza mvura uye kudzivirira mvura, inogona kuvandudza zvakanyanya kushanda kwese kwesement-based materials. Semuyenzaniso, HPMC inogona kuve nechokwadi chekuyerera kwesimende-yakavakirwa zvinhu uku ichiwedzera kutsemuka kwayo uye kuramba kwemvura munhanho yekuomesa mushure mekuvaka. Kune mhando dzakasiyana dzesimende-yakavakirwa zvinhu, kuwedzera kweHPMC kunogona kugadzirisa mashandiro avo sezvinodiwa kuti vawedzere kushanda kwekushanda uye kusimba kwenguva refu kwesimende-yakavakirwa zvinhu.
Hydroxypropyl methylcellulose (HPMC), seyepamusoro-inoita mvura-inonyungudika yepolymer zvinhu, inogona kuvandudza zvakanyanya huwandu hwakawanda hwesimende-based zvinhu, kunyanya mu rheology, crack resistance, water resistance and thickening effect. Kuita kwayo kwakanaka kunoita kuti HPMC ishandiswe zvakanyanya mumunda wezvivakwa zvekuvaka, kunyanya simende-yakavakirwa zvinhu. Mune ramangwana, nekuvandudzwa kunoramba kuripo kwezvinodiwa zvekushanda kwesimende-based materials, kugona kushandisa kweKimaCell®HPMC nezvakabva pairi kuchiri kuda kuongororwa nekuvandudzwa.
Nguva yekutumira: Jan-27-2025