Riƙewar ruwa na HPMC a cikin turmi masonry

Kamar yadda muka sani, ka'idar cikakken hydration na siminti yana buƙatar kashi 26% na yawan siminti, kuma ainihin amfani da ruwa na turmi ya zarce ruwan da ake buƙata don hydration na siminti a cikin turmi, wanda ya fi dacewa don biyan bukatun gini. Ƙarfin dutsen siminti yana da alaƙa da alaƙar ruwa-ciminti. Mafi girman rabon siminti na ruwa, mafi girman porosity na dutsen siminti, ƙananan ƙarfin dutsen siminti, da ƙananan ƙarfin turmi. Sabili da haka, idan dai aikin riƙewar ruwa na turmi na masonry yana tabbatar da aiki na turmi da danshin da ake bukata don hydration na siminti a cikin turmi.

Idan ajiyar ruwa na turmi na masonry yana da kyau sosai, ainihin ruwan da aka ajiye a cikin turmi zai fi girma, ainihin adadin simintin ruwa na turmi zai fi girma, ainihin ƙarfin turmi zai zama ƙasa, kuma ƙarfin haɗin gwiwa zai kasance mafi girma. kuma zai ragu. saukar da. Bugu da kari, ajiyar ruwa na turmi yana da kyau sosai, kuma ba a sauƙaƙe ruwan da kayan toshewar ba, wanda kuma zai yi tasiri ga haɗin gwiwa tsakanin slurry na siminti da kayan toshe, da tsawaita lokacin saita turmi, ta haka ne. yana shafar saurin masonry da ƙara wahalar gini. Saboda haka, ma'aunin riƙe ruwa na turmi masonry ya kamata ya dace da na kayan toshe.

Idan tsarin pore na kayan toshe yana buɗe, kuma kayan toshe yana da sauƙin shiga ta ruwa, kamar tubalin da aka kora, riƙewar ruwa na turmi na masonry na iya zama ƙasa, kuma ana iya amfani da fiye da 80%, kamar bulo na yau da kullun. harba da turmi na gargajiya don masonry mai tasiri sosai.

Idan tsarin pore na kayan toshe ya rufe, porosity yana da girma, kayan toshewar ruwa ba sa shiga cikin sauƙi, ko kuma ba a yarda a jika kayan toshewar da ruwa yayin gini ba, to ya kamata riƙon ruwa na turmi na masonry ya kamata. ƙara damshin turmi don saduwa da matsakaicin da ake buƙata don ruwan siminti. Alal misali, a cikin ginin tubalin lemun tsami-yashi mai sarrafa kansa, idan aka yi amfani da turmi na katako tare da adadin ruwa na 80% don gina tubalin lemun tsami-yashi, ajiyar ruwa na turmi ya ragu, kuma danshi a cikin turmi yana da sauƙi. sha da lemun tsami. Tushen yashi, wanda ke haifar da ƙarancin ƙarancin ruwa da ake buƙata don hydration na siminti a cikin mahaɗin turmi, ta yadda ba za a iya aiwatar da ruwan siminti akai-akai ba, yana rage ƙarfin gaske na turmi da ƙarfin haɗin turmi da bulo-yashi na lemun tsami. . Wannan kuma yana daya daga cikin dalilan da ke sa ginin turmi na gargajiya yana da sauƙin fashewa. Sabili da haka, riƙewar ruwa na turmi don tubalin masonry ya kamata a sarrafa sama da 88%.

Duk da haka, idan muka ƙara yawan ajiyar ruwa na turmi na tubalin masonry zuwa fiye da 95%, zai yi wuya a sha danshi a haɗin gwiwar turmi, ainihin ƙarfin turmi zai ragu, kuma ƙarfin haɗin gwiwa zai ragu. tsakanin tubali da bango kuma zai ragu. Hakanan za a rage turmi da tubali. Ruwan ruwa na turmi yana da kyau sosai, tubalin ba su da sauƙi don manne da turmi a lokacin masonry, kuma turmi yana da ƙarfi, kuma tsayin ginin yana da iyaka.

Sabili da haka, riƙewar ruwa na hydroxypropyl methylcellulose a cikin turmi na masonry ba shi da yawa kamar yadda zai yiwu, kuma daban-daban kayan toshe ya kamata su sami kewayon ajiyar ruwa mai dacewa.