Tasirin Hydroxyethyl Methyl Cellulose (HEMC) akan Saita Lokaci a cikin Abubuwan Haɗin Kankare

Lokacin saita kankare shine muhimmin ma'auni wanda ke shafar ingancin gini da ci gaba. Idan lokacin saitin ya yi tsayi da yawa, zai iya haifar da jinkirin ci gaban ginin kuma ya lalata ingancin siminti; idan lokacin da aka saita ya yi gajere, zai iya haifar da matsaloli a cikin gine-gine kuma ya shafi tasirin ginin. Domin daidaita lokacin saitin siminti, yin amfani da kayan haɗin gwiwa ya zama hanyar gama gari a cikin samar da siminti na zamani.Hydroxyethyl Methyl Cellulose (HEMC), Kamar yadda na kowa modified cellulose wanda aka samu, ana amfani da ko'ina a cikin kankare admixtures kuma zai iya rinjayar rheology, riƙewar ruwa, saitin lokaci da sauran kaddarorin kankare.1. Abubuwan asali na HEMC

HEMC shine cellulose da aka gyara, yawanci ana yin shi daga cellulose na halitta ta hanyar ethylation da halayen methylation. Yana da kyau ruwa solubility, thickening, ruwa riƙewa da gelling Properties, don haka shi ne yadu amfani a yi, coatings, yau da kullum sunadarai da sauran filayen. A cikin kankare, ana amfani da HEMC sau da yawa azaman mai kauri, mai kula da ruwa da wakili mai kula da rheology, wanda zai iya inganta aikin siminti, ƙara mannewa da tsawaita lokacin saiti.

2. Tasirin HEMC akan lokacin saiti na kankare
Jinkirta lokacin saitin
A matsayin abin da aka samo asali na cellulose, HEMC yana ƙunshe da adadi mai yawa na ƙungiyoyin hydrophilic a cikin tsarinsa na kwayoyin halitta, wanda zai iya hulɗa tare da kwayoyin ruwa don samar da tsayayyen hydrates, don haka jinkirta tsarin hydration na siminti zuwa wani matsayi. Halin hydration na ciminti shine babban tsarin ƙaddamar da kankare, kuma ƙari na HEMC na iya shafar lokacin saiti ta hanyoyi masu zuwa:

Ingantattun riƙon ruwa: HEMC na iya inganta haɓakar ruwa na siminti sosai, rage fitar da ruwa, da tsawaita lokacin amsawar siminti hydration. Ta hanyar riƙe ruwa, HEMC na iya guje wa asarar ruwa mai yawa, don haka jinkirta faruwar saitin farko da na ƙarshe.

Rage hydration zafi: HEMC na iya hana karo da hydration dauki na siminti barbashi ta ƙara danko na kankare da rage motsi na siminti barbashi. Ƙananan hydration kudi yana taimakawa wajen jinkirta lokacin saiti na kankare.

Daidaitawar Rheological: HEMC na iya daidaita kaddarorin rheological na siminti, ƙara dankon sa, da kuma ci gaba da manna simintin a cikin ruwa mai kyau a farkon matakin, guje wa matsalolin gini da ke haifar da matsanancin coagulation.

Abubuwa masu tasiri
TasirinHEMCakan saita lokaci ba wai kawai yana da alaƙa da adadin sa ba, har ma da wasu abubuwan waje suna shafar su:

Nauyin kwayoyin halitta da digiri na maye gurbin HEMC: Matsayin kwayoyin halitta da digiri na maye gurbin (matakin maye gurbin ethyl da methyl) na HEMC yana da tasiri mai girma akan aikinsa. HEMC tare da nauyin kwayoyin mafi girma da matsayi mafi girma na maye gurbin yawanci zai iya samar da tsarin cibiyar sadarwa mai ƙarfi, yana nuna mafi kyawun riƙewar ruwa da kaddarorin kauri, don haka tasirin jinkirta akan saita lokaci ya fi mahimmanci.

Nau'in siminti: Nau'in siminti daban-daban suna da nau'ikan hydration daban-daban, don haka tasirin HEMC akan tsarin siminti daban-daban shima ya bambanta. Siminti na Portland na yau da kullun yana da saurin samar da ruwa, yayin da wasu siminti mai ƙarancin zafi ko siminti na musamman yana da ƙarancin ƙarancin ruwa, kuma rawar HEMC a cikin waɗannan tsarin na iya zama mafi shahara.

Yanayin muhalli: Yanayin muhalli kamar zafin jiki da zafi suna da tasiri mai mahimmanci akan saita lokacin siminti. Yanayin zafi mafi girma zai hanzarta amsawar hydration na siminti, yana haifar da taƙaitaccen lokacin saiti, kuma tasirin HEMC a cikin yanayin zafi mai zafi na iya raunana. Akasin haka, a cikin ƙananan yanayin zafi, sakamakon jinkiri na HEMC na iya zama mafi bayyane.

Ƙaddamar da HEMC: Ƙaddamar da HEMC kai tsaye yana ƙayyade matakin tasirinsa akan kankare. Mafi yawan adadin HEMC na iya ƙara yawan riƙe ruwa da rheology na kankare, ta yadda zai iya jinkirta lokacin saitawa yadda ya kamata, amma wuce kima HEMC na iya haifar da ƙarancin ruwan siminti kuma yana shafar aikin gini.

Tasirin haɗin gwiwa na HEMC tare da sauran abubuwan haɓakawa
Yawancin lokaci ana amfani da HEMC tare da wasu abubuwan haɗaka (kamar masu rage ruwa, masu ragewa, da sauransu) don daidaita aikin siminti gaba ɗaya. Tare da haɗin gwiwar masu jinkirtawa, za a iya ƙara haɓaka tasirin jinkirin saiti na HEMC. Misali, tasirin haɗin gwiwa na wasu retarders kamar phosphates da sukari admixtures tare da HEMC na iya ƙara haɓaka lokacin saitin siminti, wanda ya dace da ayyuka na musamman a cikin yanayin zafi ko buƙatar lokaci mai tsawo.

3. Sauran tasirin HEMC akan kaddarorin kankare

Baya ga jinkirta lokacin saiti, HEMC kuma yana da tasiri mai mahimmanci akan sauran kaddarorin siminti. Misali, HEMC na iya inganta haɓakar ruwa, hana rarrabuwa, aikin famfo da dorewa na kankare. Yayin da ake daidaita lokacin saiti, tasirin kauri da riƙe ruwa na HEMC shima zai iya hana warewa ko zubar jini na kankare yadda ya kamata, da haɓaka inganci da kwanciyar hankali na siminti.

Hydroxyethyl methylcellulose (HEMC) na iya jinkirta lokacin saitin kankare daidai ta hanyar riƙewar ruwa mai kyau, kauri da tasirin rheological. Matsayin tasiri na HEMC yana shafar abubuwa kamar nauyin kwayoyinsa, matakin maye gurbinsa, nau'in ciminti, haɗin haɗin gwiwa da yanayin muhalli. Ta hanyar sarrafa daidaitaccen sashi da rabo na HEMC, za a iya tsawaita lokacin saita yadda ya kamata yayin tabbatar da aikin ginin siminti, kuma ana iya inganta aiki da dorewar siminti. Duk da haka, yawan amfani da HEMC na iya haifar da mummunan tasiri, kamar rashin ruwa mara kyau ko rashin cika ruwa, don haka yana buƙatar amfani da shi tare da taka tsantsan daidai da ainihin bukatun injiniya.