Hydroxypropyl methylcellulose wani sinadari ne na polymer mai narkewa cikin ruwa, wanda kuma aka sani da resin mai narkewa cikin ruwa ko polymer mai narkewa cikin ruwa. Yana kauri hadin ta hanyar kara danko na ruwan hadewa. Kayan polymer ne mai hydrophilic. Ana iya narkar da shi a cikin ruwa don samar da mafita ko warwatsewa. Gwaje-gwaje sun nuna cewa lokacin da adadin superplasticizer na tushen naphthalene ya karu, hada superplasticizer zai rage juriyar warwatsewar turmi na siminti da aka hade sabo. Wannan saboda naphthalene superplasticizer wani sinadari ne mai surfactant. Lokacin da aka kara sinadarin rage ruwa a turmi, ana shirya sinadarin rage ruwa a saman barbashin siminti, ta yadda saman barbashin siminti yana da irin wannan caji. Wannan tururin wutar lantarki yana wargaza tsarin flocculation da barbashin siminti suka samar, kuma ruwan da aka nade a cikin tsarin yana sakinsa, wanda ke haifar da asarar wani bangare na siminti. A lokaci guda, an gano cewa tare da karuwar abun ciki na HPMC, juriyar warwatsewar turmi na siminti sabo ya zama mafi kyau.
Ƙarfin siminti:
Ana amfani da cakuda siminti na HPMC a ƙarƙashin ruwa wanda ba ya warwatsewa a fannin injiniyan tushe na gadar babbar hanya, kuma matakin ƙarfin ƙira shine C25. A cewar gwajin asali, adadin siminti shine 400kg, adadin microsilica shine 25kg/m3, mafi kyawun adadin HPMC shine 0.6% na adadin siminti, rabon ruwa da siminti shine 0.42, rabon yashi shine 40%, kuma fitarwa na naphthyl superplasticizer shine 8% na adadin siminti. Samfuran siminti a cikin iska na tsawon kwanaki 28 suna da matsakaicin ƙarfi na 42.6MPa, kuma simintin da aka zuba a ƙarƙashin ruwa na tsawon kwanaki 28 tare da digo na ruwa na 60mm yana da matsakaicin ƙarfi na 36.4 MPa.
1. Ƙara HPMC yana da tasiri mai kyau ga cakuda turmi. Tare da ƙaruwar abun ciki na HPMC, lokacin saita turmi yana tsawaita a hankali. A ƙarƙashin irin wannan abun ciki na HPMC, turmi da aka yi a ƙarƙashin ruwa ya fi turmi da aka yi a cikin iska kyau. Lokacin ƙarfafawa na ƙera ya fi tsayi. Wannan fasalin yana sauƙaƙa famfo na siminti a ƙarƙashin ruwa.
2. Turmin siminti sabo da aka haɗa da hydroxypropyl methylcellulose yana da kyakkyawan aiki na haɗawa kuma ba ya zubar da jini sosai.
3. Yawan sinadarin HPMC da buƙatar ruwa na turmi sun ragu da farko sannan suka ƙaru sosai.
4. Haɗa sinadarin rage ruwa yana inganta matsalar ƙaruwar buƙatar ruwa ga turmi, amma dole ne a sarrafa shi yadda ya kamata, in ba haka ba wani lokacin zai rage juriyar wargajewar turmi na siminti da aka haɗa a ƙarƙashin ruwa.
5. Babu bambanci sosai a tsarin samfurin manna siminti da aka haɗa da HPMC da samfurin da babu komai a ciki, kuma babu bambanci sosai a cikin tsari da yawan samfurin manna siminti a cikin ruwa da iska mai zuba. Samfurin da aka samar bayan kwana 28 a ƙarƙashin ruwa yana da ɗan sassauƙa. Babban dalilin shine ƙara HPMC yana rage asarar siminti da yaɗuwa yayin zuba ruwa, amma kuma yana rage ƙanƙantar dutsen siminti. A cikin aikin, ya kamata a rage adadin HPMC gwargwadon iko yayin da ake tabbatar da tasirin rashin wargajewa a ƙarƙashin ruwa.
6. Haɗakar simintin HPMC da ba ya warwatsewa a ƙarƙashin ruwa, sarrafa adadin yana taimakawa wajen inganta ƙarfi. Ayyukan gwaji sun nuna cewa simintin da aka yi a cikin ruwa yana da rabon ƙarfi na kashi 84.8% na wanda aka yi a cikin iska, kuma tasirin ya fi mahimmanci.
Lokacin Saƙo: Yuni-16-2023