Cellulose ethers a kan bango putty

Cellulose ether (hydroxypropyl methylcellulose, HPMC a takaice) wani abu ne na yau da kullun don gina bangon bangon ciki kuma yana taka muhimmiyar rawa a cikin putty. HPMC tare da viscosities daban-daban yana da babban tasiri akan aikin putty. Wannan takarda a tsarin tana nazarin tasiri da dokokin nau'o'in viscosities daban-daban na HPMC da adadin sa akan aikin putty, kuma yana ƙayyade mafi kyawun ɗanko da sashi na HPMC a cikin putty.

Mabuɗin kalmomi: cellulose ether, danko, putty, yi

0.Gabatarwa

Tare da ci gaban al'umma, mutane suna daɗa sha'awar rayuwa a cikin yanayi mai kyau na cikin gida. A cikin aiwatar da kayan ado, manyan wuraren ganuwar suna buƙatar gogewa da daidaita su tare da putty don cika ramuka. Putty abu ne mai mahimmanci mai goyan bayan kayan ado. Magani mara kyau na tushe zai haifar da matsaloli kamar fatattaka da kwasfa na fenti. Yin amfani da sharar masana'antu da ma'adanai masu ƙura tare da kaddarorin tsaftace iska don nazarin sabon ginin kare muhalli putty ya zama batu mai zafi. Hydroxypropyl methyl cellulose (Hydroxypropyl methyl cellulose, Turanci raguwa ne HPMC) ne ruwa-soluble polymer abu p, kamar yadda aka fi amfani da admixture ga gina putty, shi yana da kyau ruwa rike yi, tsawaita aiki lokaci da kuma inganta gina yi , Inganta aikin yadda ya dace. . Dangane da bincike na gwaji na baya, wannan takarda ta shirya wani nau'in bangon bangon ciki na kare muhalli putty tare da diatomite a matsayin babban filler mai aiki, kuma yayi nazari akai-akai akan tasirin tasirin HPMC daban-daban da adadin sa akan juriya na ruwa na putty, ƙarfin haɗin gwiwa, na farko. bushewa tsaga juriya, niƙa Tasirin iya aiki, iya aiki da lokacin bushewar ƙasa.

1. Bangaren gwaji

1.1 Gwada albarkatun kasa da kayan aiki

1.1.1 Raw kayan

4 W-HPMC, 10 W-HPMC, da 20 W-HPMC cellulose ether da polyvinyl barasa roba foda da aka yi amfani da su a cikin gwajin Kima Chemical Co., Ltd; Kamfanin Jilin Diatomite ya ba da diatomite; nauyi alli da talcum foda Wanda Shenyang SF Industrial Group ke bayarwa; 32.5 R farar simintin Portland an samar da shi ta Kamfanin Yatai Cement.

1.1.2 Gwajin kayan aiki

Mai gwajin siminti NLD-3; farkon busasshiyar gwajin hana fasa busassun BGD 597; mai gwada ƙarfin haɗin kai na HC-6000 C; hadawa da sanding dispersing Multi-purpose machine BGD 750.

1.2 Hanyar gwaji

Ainihin dabara na gwajin, wato, abun ciki na ciminti, nauyi alli, diatomite, talcum foda da polyvinyl barasa shine 40%, 20%, 30%, 6% da 4% na jimlar adadin foda, bi da bi. . Matsakaicin adadin HPMC tare da viscosities daban-daban guda uku sune 1‰, 2‰, 3‰, 4‰kuma 5‰bi da bi. Don dacewa da kwatancen, ana sarrafa kauri na ginin fasfo ɗaya a cikin 2 mm, kuma ana sarrafa matakin haɓaka a 170 mm zuwa 180 mm. Alamun ganowa sune juriya na bushewa na farko, ƙarfin haɗin gwiwa, juriya na ruwa, kayan yashi, iya aiki da lokacin bushewar ƙasa.

2. Sakamakon gwaji da tattaunawa

2.1 Tasirin viscosities daban-daban na HPMC da adadin sa akan ƙarfin haɗin gwiwa na putty

Daga sakamakon gwajin da ƙarfin haɗin gwiwa na daban-daban viscosities na HPMC da abun ciki a kan putty's bond ƙarfi, ana iya gani cewa putty'Ƙarfin haɗin gwiwa yana ƙaruwa da farko sannan yana raguwa tare da karuwar abun ciki na HPMC. Ƙarfin haɗin gwiwa na putty yana da tasiri mafi girma, wanda ya karu daga 0.39 MPa lokacin da abun ciki ya kasance 1‰zuwa 0.48 MPa lokacin da abun ciki ya kasance 3‰. Wannan shi ne saboda lokacin da aka tarwatsa HPMC cikin ruwa, ether cellulose a cikin ruwa yana kumbura da sauri kuma ya haɗa da foda na roba, tare da juna, kuma samfurin hydration na siminti yana kewaye da wannan fim ɗin polymer don samar da wani lokaci na matrix, wanda ya sa. the putty bond Ƙarfin yana ƙaruwa, amma lokacin da adadin HPMC ya yi girma ko kuma danko ya yi yawa ko kuma ƙasa da ƙasa, fim din polymer da aka kafa tsakanin HPMC da simintin siminti yana da tasirin rufewa, wanda ke rage ƙarfin haɗin gwiwa na putty.

2.2 Tasirin viscosities daban-daban na HPMC da abun ciki akan bushewar lokacin sa

Ana iya gani daga sakamakon gwaji na daban-daban viscosities na HPMC da sashi a kan lokacin bushewa na putty da kuma lokacin bushewa. Mafi girman danko na HPMC kuma mafi girman sashi, mafi tsayin lokacin bushewa na putty. /T298-2010), lokacin bushewa na bangon bangon ciki ba zai wuce 120 min ba, kuma lokacin da abun ciki na 10 W-HPMC ya wuce 4‰, da abun ciki na 20 W-HPMC ya wuce 3‰, lokacin bushewar farfajiya na putty ya wuce ƙayyadaddun buƙatun. Wannan saboda HPMC yana da tasiri mai kyau na riƙe ruwa. Lokacin da aka gauraya HPMC a cikin abin da ake sakawa, ƙwayoyin ruwa da ƙungiyoyin hydrophilic akan tsarin kwayoyin halitta na HPMC na iya haɗawa da juna don gabatar da ƙananan kumfa. Wadannan kumfa suna da tasirin "nadi", wanda ke da amfani ga batching putty Bayan da aka taurara, wasu kumfa na iska har yanzu suna wanzu don samar da pores masu zaman kansu, wanda ke hana ruwa daga fitar da sauri da sauri kuma yana tsawaita lokacin bushewa na fili na putty. Kuma idan aka hada HPMC a cikin abin da ake sakawa, ana sanya kayan hydration irin su calcium hydroxide da CSH gel a cikin siminti tare da kwayoyin HPMC, wanda ke kara dankowar maganin pore, yana rage motsin ions a cikin maganin pore, kuma yana dagewa. da ciminti hydration tsari.

2.3 Tasirin viscosities daban-daban na HPMC da adadin sa akan sauran kaddarorin putty

Ana iya gani daga sakamakon gwajin tasirin tasirin daban-daban na HPMC da adadin sa a kan wasu kaddarorin sa. Bugu da kari na HPMC da daban-daban danko sa na farko bushewa crack juriya, ruwa juriya da kuma sanding yi na putty duk al'ada, amma tare da karuwa da adadin HPMC , matalauta yi yi. Saboda tasirin kauri na HPMC, abun ciki da yawa zai ƙara daidaiton abin da ake sakawa, wanda zai sa ya yi wahala a goge abin da ake sakawa da kuma lalata aikin ginin.

3. Kammalawa

(1) Ƙarfin haɗin gwiwa na putty yana ƙaruwa da farko sannan kuma yana raguwa tare da karuwar abun ciki na HPMC, kuma ƙarfin haɗin gwiwa na putty ya fi tasiri idan abun ciki na 10 W-HPMC shine 3.‰.

(2) Mafi girman danko na HPMC kuma mafi yawan abun ciki, tsayin lokacin bushewar farfajiyar sa. Lokacin da abun ciki na 10 W-HPMC ya wuce 4‰, kuma abun ciki na 20 W-HPMC ya wuce 3‰, lokacin bushewa-bushewa na putty yayi tsayi da yawa kuma bai dace da ma'auni ba. bukata

(3) Ƙara daban-daban viscosities na HPMC sa na farko bushewa crack juriya, ruwa juriya da sanding yi na putty al'ada, amma tare da karuwa da abun ciki, da yi yi zama mafi muni. Yin la'akari sosai, aikin putty ya haɗu da 3‰10 W-HPMC shine mafi kyau.