Cellulose Ether da Sitaci Ether akan Kaddarorin Rumbun Haɗe-haɗe

An haɗa nau'o'i daban-daban na ether cellulose da sitaci ether a cikin busassun busassun turmi, kuma an yi nazarin daidaito, da yawa na fili, ƙarfin matsawa da ƙarfin haɗin kai na turmi da gwaji. Sakamakon ya nuna cewa ether cellulose da sitaci ether na iya inganta aikin dangi na turmi sosai, kuma lokacin da aka yi amfani da su a cikin adadin da ya dace, cikakken aikin turmi zai fi kyau.

Mabuɗin kalmomi: ether cellulose; sitaci ether; busassun gauraye turmi

Turmi na gargajiya yana da lahani na sauƙin zubar jini, fashewa, da ƙarancin ƙarfi. Ba abu mai sauƙi ba ne don saduwa da buƙatun ingancin gine-gine masu kyau, kuma yana da sauƙi don haifar da hayaniya da gurɓataccen muhalli yayin aikin samarwa. Tare da haɓaka buƙatun mutane don haɓaka inganci da muhallin muhalli, turmi-busasshen gauraye tare da ingantaccen aiki an fi amfani da shi sosai. Turmi-busashe, wanda kuma aka sani da busassun turmi, samfuri ne na ƙayyadaddun ƙayyadaddun da aka haɗe da kayan siminti, daɗaɗɗen ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan ƙayatarwa. Ana jigilar shi zuwa wurin ginin a cikin jaka ko a cikin yawa don haɗuwa da ruwa.

Cellulose ether da sitaci ether sune abubuwan haɗin ginin turmi na yau da kullun. Cellulose ether shine ainihin tsarin naúrar anhydroglucose wanda aka samo daga cellulose na halitta ta hanyar amsawar etherification. Abu ne mai narkewa da ruwa kuma yawanci yana aiki azaman mai mai a turmi. Bugu da ƙari, zai iya rage ƙimar daidaito na turmi, inganta aikin turmi, ƙara yawan adadin ruwa na turmi, da kuma rage yiwuwar fashewar murfin turmi. Sitaci ether shine ether mai maye gurbin sitaci wanda aka samar ta hanyar halayen ƙungiyoyin hydroxyl a cikin ƙwayoyin sitaci tare da abubuwa masu aiki. Yana da ikon yin kauri mai kyau sosai, kuma ƙarancin ƙima na iya samun sakamako mai kyau. Yawancin lokaci ana haɗe shi da cellulose a cikin ginin turmi Yi amfani da ether.

1. Gwaji

1.1 Kayan danye

Cement: Ishi P·O42.5R siminti, daidaitaccen amfani da ruwa 26.6%.

Yashi: matsakaiciyar yashi, ingancin ingancin 2.7.

Cellulose ether: hydroxypropyl methylcellulose ether (HPMC), danko 90000MPa·s (Maganin ruwa na 2%, 20°C), wanda Shandong Yiteng New Material Co., Ltd ya bayar.

Starch ether: hydroxypropyl sitaci ether (HPS), wanda Guangzhou Moke Building Materials Technology Co., Ltd ya samar.

Ruwa: ruwan famfo.

1.2 Hanyar gwaji

Dangane da hanyoyin da aka yiwa "ka'idoji don hanyoyin gwajin aikin turmi" JGJ / T20, ana aiwatar da shirye-shiryen samfurori da kuma abubuwan da aka yiwa sigogi suna gudana.

A cikin wannan gwajin, an ƙayyade amfani da ruwa na turmi mai mahimmanci DP-M15 tare da daidaito na 98mm, kuma adadin turmi shine siminti: yashi: ruwa = 1: 4: 0.8. Matsakaicin ether cellulose a cikin turmi shine 0-0.6%, kuma adadin sitaci ether shine 0-0.07%. Ta hanyar canza adadin cellulose ether da sitaci ether, an gano cewa canjin sashi na admixture yana da tasiri a kan turmi. tasiri akan aikin da ke da alaƙa. An ƙididdige abun ciki na ether cellulose da sitaci ether a matsayin adadin yawan siminti.

2. Sakamakon gwaji da bincike

2.1 Sakamakon gwaji da bincike na admixture-doped guda ɗaya

Dangane da rabon shirin gwajin da aka ambata a sama, an gudanar da gwajin, kuma an sami tasirin haɗakarwa guda ɗaya akan daidaito, ƙarancin gani, ƙarfin matsawa da ƙarfin haɗin gwiwa na busassun busassun turmi.

Yin nazarin sakamakon gwaji na abubuwan da aka haɗa guda ɗaya, ana iya ganin cewa lokacin da aka haɗa sitaci ether shi kaɗai, daidaiton turmi yana raguwa ci gaba idan aka kwatanta da turmi mai ma'ana tare da haɓakar adadin sitaci ether, da kuma bayyanar da yawa na turmi. turmi zai karu tare da karuwar adadin. Ragewa, amma ko da yaushe girma fiye da ma'auni turmi bayyananne yawa, turmi 3D da 28d ƙarfi matsawa zai ci gaba da raguwa, kuma ko da yaushe kasa da benchmark turmi compressive ƙarfi, kuma ga index of bonding ƙarfi, tare da Bugu da kari na sitaci ether ƙara, da Ƙarfin haɗin gwiwa yana ƙaruwa da farko sannan yana raguwa, kuma koyaushe yana girma fiye da ƙimar turmi mai tushe. Lokacin da ether cellulose aka haxa shi da cellulose ether kadai, kamar yadda adadin cellulose ether ya karu daga 0 zuwa 0.6%, daidaito na turmi yana raguwa da ci gaba idan aka kwatanta da turmi mai mahimmanci, amma ba kasa da 90mm ba, wanda ke tabbatar da kyakkyawan ginin ginin. turmi, kuma girman da ke bayyana yana da A lokaci guda, ƙarfin matsawa na 3d da 28d yana ƙasa da na turmi na tunani, kuma yana raguwa ci gaba tare da karuwar adadin, yayin da ƙarfin haɗin gwiwa ya inganta sosai. Lokacin da adadin ether cellulose ya kasance 0.4%, ƙarfin haɗin turmi shine mafi girma, kusan sau biyu ƙarfin haɗin turmi.

2.2 Sakamakon gwajin gauraye admixture

Dangane da tsarin haɗaɗɗen ƙira a cikin rabon admixture, an shirya samfurin turmi mai gauraya da kuma gwada shi, kuma an sami sakamakon daidaiton turmi, ƙarancin gani, ƙarfin matsawa da ƙarfin haɗin gwiwa.

2.2.1 Tasirin haɗin gwal akan daidaiton turmi

Ana samun madaidaicin madaidaicin daidai gwargwado bisa ga sakamakon gwajin haɗaɗɗun abubuwan haɗin gwiwa. Ana iya gani daga wannan cewa lokacin da adadin cellulose ether ya kasance 0.2% zuwa 0.6%, kuma adadin sitaci na sitaci shine 0.03% zuwa 0.07%, an haɗa su biyu a cikin turmi A ƙarshe, yayin da suke riƙe da adadin daya. na admixtures, ƙara yawan adadin sauran haɗin zai haifar da raguwa a cikin daidaituwa na turmi. Tun da cellulose ether da sitaci ether Tsarin sun ƙunshi ƙungiyoyin hydroxyl da ether bonds, da hydrogen atoms a kan wadannan kungiyoyin da free ruwa kwayoyin da ke cikin cakude iya samar da hydrogen bonds, sabõda haka, ƙarin daure ruwa bayyana a cikin turmi da kuma rage gudu daga cikin turmi. , yana haifar da daidaiton darajar turmi don raguwa a hankali.

2.2.2 Tasirin haɗaɗɗen haɗakarwa akan ƙarancin turmi

Lokacin da ether cellulose da sitaci ether suka haɗu a cikin turmi a wani nau'i na nau'i, yawan adadin turmi zai canza. Ana iya gani daga sakamakon cewa haɗuwa da ether cellulose da sitaci ether a tsarin da aka tsara Bayan turmi, yawan adadin turmi ya kasance a kusan 1750kg / m.³, yayin da bayyanannun yawa na magana turmi ne 2110kg / m³, da kuma haɗuwa da su biyu a cikin turmi yana sa yawan adadin da aka bayyana ya ragu da kusan 17%. Ana iya ganin cewa haɗawa da ether cellulose da sitaci ether na iya rage yawan adadin turmi yadda ya kamata kuma ya sa turmi ya yi haske. Wannan shi ne saboda cellulose ether da sitaci ether, kamar yadda etherification kayayyakin, su ne admixtures da karfi da iska-entraining sakamako. Haɗa waɗannan abubuwan haɗawa biyu zuwa turmi na iya rage yawan yuwuwar turmi sosai.

2.2.3 Sakamakon gauraye admixture akan ƙarfin turmi

Ana samun magudanar ƙarfi na 3d da 28d na turmi daga sakamakon gwajin turmi. Ƙarfin matsi na turmi 3d da 28d sune 15.4MPa da 22.0MPa, bi da bi, kuma bayan ether cellulose ether da sitaci ether an haɗa su cikin turmi, ƙarfin matsawa na turmi 3d da 28d sune 12.8MPa da 19.3MPa, bi da bi, sun yi ƙasa da waɗanda ba tare da biyu ba. Turmi mai ma'ana tare da admixture. Daga tasirin abubuwan haɗin gwal akan ƙarfin matsawa, ana iya ganin cewa komai ko lokacin warkewa shine 3d ko 28d, ƙarfin ƙarfin turmi yana raguwa tare da haɓaka adadin adadin ether cellulose da sitaci ether. Wannan shi ne saboda bayan da ether cellulose ether da sitaci ether aka hade, latex barbashi za su samar da wani siririn Layer na polymer hana ruwa tare da siminti, wanda ya hana hydration na siminti da kuma rage matsa lamba na turmi.

2.2.4 Tasirin gaurayawan admixture akan ƙarfin haɗin turmi

Ana iya gani daga tasirin ether cellulose da sitaci ether akan ƙarfin mannewa na turmi bayan da aka tsara tsarin da aka tsara kuma an haɗa shi cikin turmi. Lokacin da adadin cellulose ether shine 0.2% ~ 0.6%, adadin sitaci ether shine 0.03% ~ 0.07% %, bayan an haɗa su biyu a cikin turmi, tare da karuwar adadin biyu, ƙarfin haɗin gwiwa na haɗin gwiwa. turmi zai fara karuwa a hankali a hankali, kuma bayan ya kai wani ƙima, tare da karuwar adadin adadin, ƙarfin mannewa na turmi zai karu a hankali. Ƙarfin haɗin kai zai ragu a hankali, amma har yanzu yana da girma fiye da ƙimar ƙarfin haɗakar turmi. Lokacin haɗawa tare da 0.4% cellulose ether da 0.05% sitaci ether, ƙarfin haɗin gwiwa na turmi ya kai matsakaicin, wanda shine kusan sau 1.5 mafi girma fiye da na turmi. Duk da haka, lokacin da rabo ya wuce, ba kawai danko na turmi ya yi girma ba, ginin yana da wuyar gaske, amma kuma an rage ƙarfin haɗin gwiwa na turmi.

3. Kammalawa

(1) Dukansu ether cellulose da sitaci ether na iya rage yawan daidaituwar turmi, kuma tasirin zai fi kyau idan aka yi amfani da su tare a wani adadi.

⑵Saboda samfurin etherification yana da ƙarfin haɓakar iska, bayan ƙara ether cellulose da sitaci ether, za a sami ƙarin iskar gas a cikin turmi, ta yadda bayan ƙara ether cellulose da sitaci ether, rigar surface na turmi zai bayyana yawa. raguwa sosai, wanda zai haifar da raguwa daidai a cikin ƙarfin matsa lamba na turmi.

(3) Wani adadin adadin ether cellulose da sitaci ether na iya inganta ƙarfin haɗin gwiwa na turmi, kuma lokacin da aka yi amfani da su biyu a hade, tasirin inganta ƙarfin haɗin gwiwar turmi ya fi muhimmanci. Lokacin haɓaka ether cellulose da sitaci ether, wajibi ne don tabbatar da cewa adadin adadin ya dace. Babban adadin ba wai kawai yana lalata kayan ba, amma kuma yana rage ƙarfin haɗin gwiwa na turmi.

(4) Cellulose ether da sitaci ether, kamar yadda aka saba amfani da turmi admixtures, iya muhimmanci canza dacewa Properties na turmi, musamman a inganta turmi daidaito da kuma bonding ƙarfi, da kuma samar da tunani ga proportioning samar da bushe-mixed plastering turmi admixtures.