Imwe misiyano mikuru pakati pedhaka rakaoma uye dhaka rechinyakare nderokuti dhaka rakaoma rinogadziridzwa nekashoma kemikari additives.Kuwedzera imwe mhando yekuwedzera kune yakaoma dhaka kunonzi kugadziridza kwekutanga, kuwedzera maviri kana anopfuura ekuwedzera ndiyo yechipiri shanduko.Unhu hwehutu hwakaoma hunoenderana nekusarudzwa kwakarurama kwezvikamu uye kuwirirana uye kuenzaniswa kwezvikamu zvakasiyana-siyana.Iwo makemikari ekuwedzera anodhura uye ane simba guru pazvinhu zvedhaka rakaoma.Nokudaro, pakusarudzwa kwezvinowedzera, huwandu hwekuwedzera hunofanira kunge huri panzvimbo yekutanga.Izvi zvinotevera sumo pfupi yekusarudzwa kwemakemikari ekuwedzera cellulose ether.
Cellulose ether inozivikanwawo se rheological modifier rudzi rwemusanganiswa unoshandiswa kugadzirisa rheological zvimiro zvedhaka idzva rakasanganiswa, rinoda kushandiswa mumhando dzese dzedhaka.Izvo zvinotevera zvivakwa zvinofanirwa kuverengerwa pakusarudza iyo siyana uye huwandu hwakawedzerwa:
(1) Kuchengeta mvura patembiricha dzakasiyana;
(2) kukora, viscosity;
(3) Hukama huri pakati pekusachinja-chinja uye tembiricha, uye pesvedzero pakusimba mukuvapo kwe electrolyte;
(4) chimiro uye dhigirii etherification;
(5) kuvandudzwa kweiyo thixotropy uye yekumisikidza kugona kwedhaka (iyo inodiwa kune dhaka rakaputirwa pamusoro vertical surface);
(6) Kuparara kwehuwandu, mamiriro uye kupera kwekupera.
Pamusoro pekuwedzera cellulose ether mudhaka rakaoma (senge methyl cellulose ether), inogonawo kuwedzera vinyl polyvinyl acid ester, ndiko kuti, yechipiri shanduko.Iyo inorganic binder mudhaka (simende, gypsum) inogona kuvimbisa yakakwira yekumanikidza simba, asi ine zvishoma mhedzisiro pakusimba kwekusimba uye kubhenda simba.Vinyl polyvinyl ester inovaka elastic firimu mune simende gomba rematombo, ita dhaka rinogona kutakura yakakwira deformation mutoro, kunatsiridza kupfeka kuramba.Zvakaratidzwa nekuita kuti nekuwedzera huwandu hwakasiyana hwemethyl cellulose ether uye vinyl polyvinyl ester mudhaka rakaoma, dhaka rakatetepa rekuisa ndiro inosunga dhaka, dhaka rekupurasita, dhaka rekushongedza, dhaka rekongiri rinoputika uye dhaka rinozvimisa rekudira pasi. inogona kugadzirira.Kusanganisa izvo zviviri hazvigone kungovandudza hutano hwedhaka, asiwo kuvandudza zvakanyanya kushanda kwekuvaka.
Mukushanda kunoshanda, kuitira kuti uvandudze kushanda kwakazara, zvinodikanwa kushandisa akawanda admixtures.Mutambo wakanakisa pakati peyekuwedzera chikamu, iyo chaiyo dosage renji, chiyero, inogona kubva kune akasiyana mativi ane zvimwe mhedzisiro yekuvandudza mashandiro edhaka, asi kugadziridza kwayo mhedzisiro yedhaka kana ichishandiswa chete ishoma, dzimwe nguva inotova nemhedzisiro yakaipa, yakadai. se single doped fiber, mukuwedzera kunamatira kwedhaka, kuderedza dhigirii ye stratification panguva imwe chete, Zvisinei, kushandiswa kwemvura kwedhaka kunowedzera zvakanyanya uye kuchengetwa mu slurry, izvo zvinotungamirira mukuderera kwesimba rekumanikidza.Kana iyo air intraining agent yawedzerwa, iyo mortar delamination degree uye kushandiswa kwemvura kunogona kuderedzwa zvakanyanya, asi iyo yekumanikidza simba redhaka inoderera nekuda kwemamwe mabhuru.Kuvandudza masonry dhaka kuitira kuita kwakanyanya, uku uchidzivirira kukuvadza kune imwe pfuma, simba remasonry dhaka kuwirirana, dhigirii restratification uye kusangana nezvinodiwa zveinjiniya uye mirairo yehunyanzvi hwekuita, panguva imwe chete, usashandise lime putty, kuchengetedza simende. , kuchengetedzwa kwezvakatipoteredza, nezvimwewo, kubva pakuderedzwa kwemvura, viscosity, kukora kwemvura uye air-entraining plasticizing maonero, zvinodikanwa kutora matanho akazara ekugadzira uye kushandisa komputa admixtures.
Nguva yekutumira: Kubvumbi-29-2022