Masitashi eether anowirirana nemhando dzakasiyana dzesimende here?

A. Nhanganyaya

1.1 Background

Simende chinhu chakakosha chezvinhu zvekuvakisa, ichipa zvivakwa zvinosungirwa kuti zvigadzire kongiri nedhaka. Starch ethers inotorwa kubva kune yakasikwa starch masosi ari kuwana kutariswa sezviwedzere zvinoshandura zvimiro zvesimende-based zvinhu. Kunzwisisa kuenderana kwe starch ethers nemhando dzakasiyana dzesimende kwakakosha kuti uwedzere kuita kwavo uye kuve nechokwadi chekugara kwezvivakwa zvekuvaka.

1.2 Zvinangwa

Chinangwa chekuongorora uku ndecheku:

Ongorora mhando uye zvivakwa zve starch ethers inowanzoshandiswa muindasitiri yekuvaka.

Ongorora maitiro ekudyidzana pakati pe starch ethers nemhando dzakasiyana dzesimende.

Ongorora maitiro e starch ethers pane zvinhu zvesimende-based materials.

Zvinetso uye zvingave zvigadziriso zvine chekuita nekuenderana kwe starch ether nemhando dzakasiyana esimende zvinokurukurwa.

B. Mhando dzeStarch Ethers

Starch ethers ine akasiyana makomisheni anobva kune starch, polysaccharide yakawanda muzvisikwa. Mhando dzakajairika dzestarch ether dzinosanganisira:

2.1 Hydroxyethyl starch ether (HEC)

HEC inoshandiswa zvakanyanya pakuchengetedza mvura uye kukora zvivakwa, zvichiita kuti ive yakakodzera kuvandudza kushanda kwesemende misanganiswa.

2.2 Hydroxypropyl starch ether (HPC)

HPC yakawedzera kuramba kwemvura, iyo inovandudza kusimba uye kunamatira kwesimende-yakavakirwa zvinhu.

2.3 Carboxymethyl starch ether (CMS)

CMS inopa yakagadziridzwa rheological zvimiro kumusanganiswa wesimende, inokanganisa kuyerera kwayo uye kumisikidza maitiro.

C. Mhando dzesimende

Kune marudzi mazhinji esimende, imwe neimwe iine zvivakwa zvakafanira kune akasiyana maapplication. Mhando dzakajairika dzinosanganisira:

3.1 Ordinary Portland Cement (OPC)

OPC ndiyo inonyanya kushandiswa mhando yesimende uye inozivikanwa nekusiyana-siyana kwayo mumabasa ekuvaka.

3.2 Portland Pozzolana Cement (PPC)

PPC ine pozzolanic zvinhu zvinowedzera kusimba kwekongiri uye kuderedza kukanganiswa kwezvakatipoteredza.

3.3 Sulfate Resistant Cement (SRC)

SRC yakagadzirirwa kumira sulfate-rich nharaunda, nekudaro ichiwedzera kuramba kurwiswa kwemakemikari.

D. Kudyidzana nzira

Kuwirirana pakati pe starch ethers nemhando dzakasiyana dzesimende kunodzorwa nemaitiro akawanda, kusanganisira:

4.1 Adsorption pamusoro pezvimedu zvesimende

Starch ethers adsorb pazvimedu zvesimende, zvichikanganisa chaji yavo yepasi uye kushandura rheological zvimiro zvesimende slurry.

4.2 Mhedzisiro pane hydration

Starch ethers inogona kukanganisa hydration process nekukanganisa kuwanikwa kwemvura, zvichikonzeresa shanduko munguva yekumisikidza uye simba rekusimudzira simende zvinhu.

E. Mhedzisiro pane simende-yakavakirwa zvinhu

Kubatanidza starch ether musimende-based zvinhu zvinogona kuburitsa akati wandei akakosha mhedzisiro:

5.1 Kuvandudza kushanda

Starch ethers inovandudza kushanda kwemasanganiswa esimende nekuwedzera kuchengetwa kwemvura uye kuderedza kupatsanurwa.

5.2 Kuwedzera kusimba

Mamwe starch ether anovandudza kusimba nekuwedzera kuramba kutsemuka, abrasion uye kurwisa kwemakemikari.

5.3 Rheological kugadziriswa

Iyo rheological properties ye simenti slurries inogona kugadziriswa kuburikidza nekuchenjera kushandiswa kwe starch ethers, nokudaro inokanganisa viscosity uye kuyerera zvinhu.

F. Matambudziko neMagadzirirwo

Pasinei nemabhenefiti akawanda ekushandisa starch ethers, matambudziko anoramba ari mukuwana kunyatsoenderana nemhando dzakasiyana dzesimende. Aya matambudziko anosanganisira:

6.1 Kunonoka kuseta nguva

Mamwe ma<em>starch ether angawedzera nokusaziva nguva yokuisa simende, ichida kugadziridzwa kwokungwarira kuti irambe ichifambira mberi.

6.2 Mhedzisiro pakumanikidza simba

Kuenzanisa inodiwa rheological gadziriso pamwe nekukanganisa kusimba kwesimba rekumanikidza idambudziko rinoda kunyatsoyedzwa uye optimization.

6.3 Mari inotariswa

Iko mari-inoshanda ye incor perforation ye starch ethers inofanira kunyatsoongororwa, tichitarisa zvakanakira zvakanakira uye zvingangove zvisingabatsiri.

G. Mhedziso

Muchidimbu, starch ethers inoita basa rakakosha mukugadzirisa zvimiro zvesimende-based zvinhu. Iko kuwirirana kwe starch ethers nemhando dzakasiyana dzesimende chinhu chakawanda chinosanganisira kunzwisisa kupindirana pachiyero chemolecular, maitiro avo pa hydration uye mhedzisiro yekushanda kwezvinhu zvekuvaka. Zvisinei nezvipingamupinyi, kunyatso gadzira uye kuyedzwa kunogona kubatsira kuona kugona kwakazara kwestarch ethers, zvichibatsira kugadzira zvinhu zvinogara uye zvinoshanda semendi-based muindasitiri yekuvaka. Tsvagiridzo yeramangwana inofanira kutarisa pakugadzirisa matambudziko chaiwo uye nekuwedzera huwandu hwemashandisirwo estarch ether mumasisitimu esimende.