Hydroxypropyl methylcellulose wani fili ne mai narkewar ruwa, wanda kuma aka sani da guduro mai narkewa ko ruwa mai narkewa. Yana yin kauri ta hanyar ƙara dankowar ruwan haɗewar. Yana da wani hydrophilic polymer abu. Ana iya narkar da shi cikin ruwa don samar da mafita ko watsawa. Gwaje-gwaje sun nuna cewa lokacin da adadin superplasticizer na tushen naphthalene ya karu, haɗa superplasticizer zai rage juriyar tarwatsewar turmin siminti da aka haɗa sabo. Wannan shi ne saboda naphthalene superplasticizer ne surfactant. Lokacin da aka ƙara ma'aunin rage ruwa a cikin turmi, ana shirya ma'aunin rage ruwa a saman simintin simintin, ta yadda sassan simintin suna da caji iri ɗaya. Wannan tarwatsewar wutar lantarki yana wargaza tsarin ɗigon ruwa da ɓangarorin siminti suka yi, kuma ruwan da aka naɗe a cikin tsarin ya fito, wanda ya haifar da asarar ɓangaren simintin. A lokaci guda, an gano cewa tare da karuwar abun ciki na HPMC, juriya na tarwatsewar sabon turmi siminti ya zama mafi kyau kuma mafi kyau.
Ƙarfin siminti:
HPMC karkashin ruwa ba dispersible kankare admixture da ake amfani a babbar hanya gada kafuwar injiniya, da zane ƙarfi matakin ne C25. Dangane da gwajin asali, adadin siminti shine 400kg, adadin microsilica shine 25kg / m3, mafi kyawun adadin HPMC shine 0.6% na adadin siminti, rabon siminti na ruwa shine 0.42, yashi rabo shine 40%, kuma fitowar naphthyl superplasticizer shine kashi 8% na adadin siminti. , Samfuran siminti a cikin iska na tsawon kwanaki 28 suna da matsakaicin ƙarfi na 42.6MPa, kuma simintin da aka zubar a ƙarƙashin ruwa na kwanaki 28 tare da digon ruwa na 60mm yana da matsakaicin ƙarfi na 36.4 MPa.
1. Bugu da kari na HPMC yana da fili retarding sakamako a kan turmi cakuda. Tare da haɓaka abun ciki na HPMC, lokacin saita turmi a hankali yana tsawaita. A karkashin irin wannan abun ciki na HPMC, turmi da aka kafa a karkashin ruwa ya fi turmi da aka yi a cikin iska. Lokacin ƙarfafa gyare-gyaren ya fi tsayi. Wannan fasalin yana sauƙaƙe aikin famfo na ruwa a ƙarƙashin ruwa.
2. Fresh siminti turmi gauraye da hydroxypropyl methylcellulose yana da kyau bonding yi da wuya jini.
3. Abubuwan da ke cikin HPMC da buƙatun ruwa na turmi sun ragu da farko sannan suka ƙaru sosai.
4. Shigar da wakili mai rage ruwa yana inganta matsalar ƙara yawan buƙatun ruwa na turmi, amma dole ne a sarrafa shi da kyau, in ba haka ba wani lokaci zai rage juriyar watsawar ruwa na turmi siminti da aka haɗe.
5. Bambanci kadan ne a tsarin simintin man siminti da aka haxa da HPMC da kuma wanda babu komai a ciki, kuma akwai ɗan bambanci a tsari da yawa na samfurin man siminti wajen zuba ruwa da iska. Samfurin da aka kafa bayan kwanaki 28 a ƙarƙashin ruwa yana ɗan sako-sako. Babban dalili kuwa shi ne, karin sinadarin HPMC yana matukar rage asara da tarwatsewar siminti yayin zuba a cikin ruwa, amma kuma yana rage takurewar dutsen siminti. A cikin aikin, ya kamata a rage adadin HPMC kamar yadda zai yiwu yayin da ake tabbatar da tasirin rashin rarrabawa a ƙarƙashin ruwa.
6. Haɗin haɗin gwiwar ruwa na HPMC ba tare da rarrabuwa ba tare da rarrabuwa ba, sarrafa adadin yana da amfani ga haɓaka ƙarfi. Ayyukan matukin jirgi sun nuna cewa simintin da aka samar a cikin ruwa yana da ƙarfin ƙarfi na 84.8% na abin da aka samu a cikin iska, kuma tasirin ya fi mahimmanci.
Lokacin aikawa: Juni-16-2023