Chidule:Zotsatira za kuchuluka kosiyanasiyana kwa hydroxypropyl methylcellulose ether pa makhalidwe a matope wamba osakaniza ndi pulasitala zinaphunziridwa. Zotsatira zake zinasonyeza kuti: ndi kuwonjezeka kwa kuchuluka kwa matope a cellulose ether, kusinthasintha ndi kuchulukana kunachepa, ndipo nthawi yoyika inachepa. Kutambasula, mphamvu yokakamiza ya 7d ndi 28d inachepa, koma magwiridwe antchito onse a matope osakaniza ndi dry-mixed awonjezeka.
0. Mawu Oyamba
Mu 2007, maunduna asanu ndi limodzi ndi ma komishoni a dzikolo adapereka "Chidziwitso Choletsa Kusakaniza Mtondo Pamalo Ena M'mizinda Ina Mkati mwa Nthawi Yochepa". Pakadali pano, mizinda 127 mdziko lonselo yachita ntchito yoletsa "kusakaniza matope omwe alipo", zomwe zabweretsa chitukuko chosayerekezeka pakupanga matope osakanikirana ndi owuma. Ndi chitukuko champhamvu cha matope osakanikirana ndi owuma m'misika yomanga yamkati ndi yakunja, zosakaniza zosiyanasiyana za matope osakanikirana ndi owuma nazonso zalowa mumakampani atsopanowa, koma makampani ena opanga ndi kugulitsa matope osakaniza ndi owuma amakokomeza dala mphamvu ya zinthu zawo, ndikusokeretsa chitukuko chathanzi komanso cholongosoka cha makampani opanga matope owuma. Pakadali pano, monga zosakaniza za konkriti, zosakaniza za matope owuma zimagwiritsidwa ntchito kwambiri pamodzi, ndipo zochepa zimagwiritsidwa ntchito zokha. Makamaka, pali mitundu yambirimbiri ya zosakaniza mu matope ena osakaniza ouma, koma mu matope wamba osakaniza ouma, palibe chifukwa chofufuza kuchuluka kwa zosakaniza, koma chisamaliro chachikulu chiyenera kuperekedwa pa momwe zimagwirira ntchito komanso momwe zimagwirira ntchito, kuti tipewe kugwiritsa ntchito mopitirira muyeso zosakaniza za matope, zomwe zimayambitsa zinyalala zosafunikira, komanso kukhudza mtundu wa polojekitiyi. Mu matope wamba osakaniza ouma, cellulose ether imagwira ntchito yosunga madzi, kukhuthala, komanso kukonza magwiridwe antchito omanga. Kugwira ntchito bwino kwa madzi kumatsimikizira kuti matope osakaniza ouma sangachititse kuchepetsedwa kwa mchenga, ufa ndi mphamvu chifukwa cha kusowa kwa madzi komanso kusungunuka kwa simenti kosakwanira; kukhuthala kwa madzi kumawonjezera kwambiri mphamvu ya kapangidwe ka matope onyowa. Pepalali likuchita kafukufuku wokhazikika pakugwiritsa ntchito cellulose ether mu matope wamba osakaniza ouma, zomwe zili ndi tanthauzo lotsogolera momwe mungagwiritsire ntchito zosakaniza moyenera mu matope wamba osakaniza ouma.
1. Zipangizo zopangira ndi njira zomwe zagwiritsidwa ntchito poyesa
1.1 Zipangizo zopangira mayeso
Simentiyo inali simenti ya P. 042.5, phulusa la ntchentche ndi phulusa la Class II lochokera ku fakitale yamagetsi ku Taiyuan, chosakaniza chabwino ndi mchenga wouma wa mtsinje wokhala ndi kukula kwa 5 mm kapena kuposerapo wosefedwa, fineness modulus ndi 2.6, ndipo cellulose ether ndi hydroxypropyl methyl cellulose ether (viscosity 12000 MPa·s).
1.2 Njira yoyesera
Kukonzekera zitsanzo ndi kuyesa magwiridwe antchito kunachitika motsatira njira yoyesera magwiridwe antchito ya JCJ/T 70-2009 yopangira matope.
2. Ndondomeko yoyesera
2.1 Fomula ya mayeso
Mu mayeso awa, kuchuluka kwa zinthu zopangira tani imodzi ya matope opaka pulasitala ouma ndi komwe kumagwiritsidwa ntchito ngati njira yoyambira yoyesera, ndipo madzi ndi omwe amagwiritsidwa ntchito ndi tani imodzi ya matope ouma ndi madzi.
2.2 Ndondomeko yeniyeni
Pogwiritsa ntchito njira iyi, kuchuluka kwa hydroxypropyl methylcellulose ether komwe kwawonjezeredwa pa tani iliyonse ya matope opaka utoto wouma ndi: 0.0 kg/t, 0.1 kg/t, 0.2 kg/t, 0.3 kg/t, 0.4 kg/tt, 0.6 kg/t, kuti tiphunzire zotsatira za kuchuluka kosiyanasiyana kwa hydroxypropyl methylcellulose ether pa kusunga madzi, kusinthasintha, kuchulukana koonekera, nthawi yokhazikika, ndi mphamvu yokakamiza ya matope opaka utoto wamba wouma, kuti atsogolere matope ouma. Kugwiritsa ntchito bwino matope osakanikirana kumatha kuzindikira zabwino za njira yosavuta yopangira matope ouma, kumanga kosavuta, kuteteza chilengedwe komanso kusunga mphamvu.
3. Zotsatira za mayeso ndi kusanthula
3.1 Zotsatira za mayeso
Zotsatira za kuchuluka kosiyanasiyana kwa hydroxypropyl methylcellulose ether pa kusunga madzi, kusinthasintha, kuchuluka koonekera, nthawi yoikika, ndi mphamvu yokakamiza ya matope opaka pulasitala wamba wouma.
3.2 Kusanthula zotsatira
Zitha kuwoneka kuchokera ku zotsatira za kuchuluka kosiyanasiyana kwa hydroxypropyl methylcellulose ether pa kusunga madzi, kusinthasintha, kuchulukira kwa madzi, nthawi yokhazikika, ndi mphamvu yokakamiza ya matope wamba osakanikirana ndi pulasitiki. Ndi kuwonjezeka kwa kuchuluka kwa cellulose ether, kuchuluka kwa madzi osungira matope onyowa kukuwonjezeka pang'onopang'ono, kuchokera pa 86.2% pamene hydroxypropyl methyl cellulose sikuphatikizidwa, mpaka 0.6% pamene hydroxypropyl methyl cellulose ikuphatikizidwa. Kuchuluka kwa madzi osungira madzi kumafika pa 96.3%, zomwe zimatsimikizira kuti mphamvu yosungira madzi ya propyl methyl cellulose ether ndi yabwino kwambiri; kusinthasintha kumachepa pang'onopang'ono chifukwa cha mphamvu yosungira madzi ya propyl methyl cellulose ether (kugwiritsa ntchito madzi pa tani imodzi ya matope sikunasinthe panthawi yoyesera); Kuchulukira kwa madzi komwe kumawonekera kukuwonetsa kutsika, kusonyeza kuti mphamvu yosungira madzi ya propyl methyl cellulose ether imawonjezera kuchuluka kwa matope onyowa ndikuchepetsa kuchulukira; Nthawi yokhazikitsa imawonjezeka pang'onopang'ono ndi kuwonjezeka kwa kuchuluka kwa hydroxypropyl methyl cellulose ether, ndi kuchuluka kwa 0.4%, imapitirira mtengo wodziwika wa maola 8 wofunikira ndi muyezo, zomwe zikusonyeza kuti kugwiritsa ntchito koyenera kwa hydroxypropyl methylcellulose ether kuli ndi zotsatira zabwino zowongolera nthawi yogwirira ntchito ya matope onyowa; mphamvu yokakamiza ya 7d ndi 28d yachepa (Muyeso waukulu, kuchepa kwake kumaonekera kwambiri). Izi zikugwirizana ndi kuwonjezeka kwa voliyumu ya matope ndi kuchepa kwa kachulukidwe koonekera. Kuwonjezera kwa hydroxypropyl methyl cellulose ether kumatha kupanga dzenje lotsekedwa mkati mwa matope olimba panthawi yokhazikitsa ndi kulimbitsa matope. Ma micropores amathandizira kulimba kwa matope.
4. Malangizo ogwiritsira ntchito efa wa cellulose mu matope wamba osakanikirana ndi youma
1) Kusankha zinthu za cellulose ether. Kawirikawiri, kukhuthala kwa cellulose ether kumakhala kwakukulu, kumakhala bwino kusunga madzi, koma kukhuthala kwake kumakhala kwakukulu, kusungunuka kwake kumakhala kochepa, zomwe zimawononga mphamvu ndi magwiridwe antchito a matope; kukhuthala kwa cellulose ether kumakhala kochepa mu matope osakanikirana ndi madzi. Amati kukhuthala kwake kumakhala kosavuta kusungunuka. Pa mlingo womwewo, kukhuthala kwake kumakhala kochepa, kumakhala bwino kusunga madzi.
2) Kusankha mlingo wa ether wa cellulose. Kuchokera ku zotsatira za mayeso ndi kusanthula kwa momwe kuchuluka kwa ether ya cellulose kumakhudzira magwiridwe antchito a matope opaka utoto wouma, zitha kuwoneka kuti kuchuluka kwa ether ya cellulose kumakhala kwakukulu, ndikofunikira kuganizira mtengo wopangira, mtundu wa chinthu, magwiridwe antchito omanga ndi mbali zinayi za malo omanga kuti musankhe bwino mlingo woyenera. Mlingo wa ether ya hydroxypropyl methyl cellulose mu matope opaka utoto wamba ndi bwino kukhala 0.1 kg/t-0.3 kg/t, ndipo mphamvu yosungira madzi singakwaniritse zofunikira ngati kuchuluka kwa ether ya hydroxypropyl methyl cellulose yowonjezeredwa pang'ono. Ngozi yaubwino; mlingo wa ether ya hydroxypropyl methyl cellulose mu matope apadera opaka utoto ndi pafupifupi 3 kg/t.
3) Kugwiritsa ntchito etha ya cellulose mu matope wamba osakanikirana ndi madzi. Pokonzekera matope wamba osakanikirana ndi madzi, kuchuluka koyenera kwa kusakaniza kumatha kuwonjezeredwa, makamaka ndi mphamvu yosungira madzi ndi kukhuthala, kuti ipange mphamvu yophatikizana ndi etha ya cellulose, kuchepetsa ndalama zopangira, ndikusunga ndalama; ngati igwiritsidwa ntchito yokha. Pa etha ya cellulose, mphamvu yolumikizirana siyingakwaniritse zofunikira, ndipo kuchuluka koyenera kwa ufa wa latex wosungunukanso kumatha kuwonjezeredwa; chifukwa cha kuchuluka kochepa kwa kusakaniza kwa matope, cholakwika choyezera chimakhala chachikulu chikagwiritsidwa ntchito chokha. Ubwino wa zinthu za matope osakanikirana ndi madzi.
5. Mapeto ndi malingaliro
1) Mu matope opaka pulasitala wamba, pamene kuchuluka kwa hydroxypropyl methylcellulose ether kukuwonjezeka, kuchuluka kwa madzi omwe amasungidwa kumatha kufika pa 96.3%, kusinthasintha ndi kuchuluka kwa madzi kumachepa, ndipo nthawi yoyika imakulitsidwa. Mphamvu yokakamiza ya 28d inachepa, koma magwiridwe antchito onse a matope opaka utoto adakula pamene kuchuluka kwa hydroxypropyl methyl cellulose ether kunali kocheperako.
2) Pokonzekera matope osakaniza owuma, etha ya cellulose yokhala ndi kukhuthala koyenera komanso kusalala iyenera kusankhidwa, ndipo mlingo wake uyenera kutsimikiziridwa mosamala kudzera mu zoyeserera. Chifukwa cha kuchuluka kochepa kwa matope osakaniza, cholakwika choyezera chimakhala chachikulu chikagwiritsidwa ntchito chokha. Ndikofunikira kusakaniza kaye ndi chonyamulira, kenako ndikuwonjezera kuchuluka kwa kuwonjezera kuti muwonetsetse kuti zinthu za matope osakaniza owuma ndi zabwino.
3) Sitima yosakaniza youma ndi makampani omwe akutukuka kumene ku China. Pakugwiritsa ntchito sitima yosakaniza, sitiyenera kufunafuna kuchuluka kwa zinthu mosasamala, koma tiyenera kuyang'ana kwambiri ubwino ndi kuchepetsa ndalama zopangira, kulimbikitsa kugwiritsa ntchito zinyalala zamafakitale, ndikukwaniritsadi kusunga mphamvu ndi kuchepetsa kugwiritsa ntchito.
Nthawi yotumizira: Feb-22-2023