Ukugcinwa kwamanzi kwe-HPMC kwi-masonry mortar

Njengoko sonke sisazi, ithiyori ye-hydration epheleleyo yesamente idinga i-26% yobunzima besamente, kwaye ukusetyenziswa kwamanzi okwenene kodaka kudlula kakhulu amanzi afunekayo ukuze kufakwe i-samente kumdaka, eyona nto ihlangabezana neemfuno zokwakha. Amandla elitye lesamente anxulumene ikakhulu nomlinganiselo wamanzi-samente enxulumene. Okukhona umlinganiselo omkhulu wesamente yamanzi, kokukhona ukuqina kwelitye lesamente, kokukhona kusiba sezantsi amandla elitye lesamente, kwaye kokukhona kuncipha amandla odaka. Ngoko ke, okoko nje ukusebenza kokugcinwa kwamanzi kwi-masonry mortar kuqinisekisa ukusebenza kodaka kunye nokufuma okufunekayo kwi-hydration ye-cement kwi-mortar.

Ukuba ukugcinwa kwamanzi kwi-masonry mortar kukuhle kakhulu, amanzi okwenene agcinwe kwi-mortar aya kuba mkhulu, umlinganiselo wokwenene wesamente wamanzi wodaka uya kuba mkhulu, amandla okwenene odaka aya kuba ngaphantsi, kwaye amandla ebhondi. nayo iya kuncipha. ithotyiwe. Ukongezelela, ukugcinwa kwamanzi omdaka kulunge kakhulu, kwaye amanzi awanakuthatyathwa lula yi-block material, eya kuchaphazela ukudibanisa phakathi kwe-cement slurry kunye ne-block material, kunye nokwandisa ixesha lokubeka udaka, ngaloo ndlela. echaphazela isantya sokwakha kunye nokwandisa ubunzima bokwakha. Ngoko ke, isalathisi sokugcinwa kwamanzi kwi-masonry mortar kufuneka sihambelane neso sixhobo sebhloko.

Ukuba isakhiwo se-pore se-block material sivulekile, kwaye i-block material ingena lula ngamanzi, njengezitena ezivuthayo, ukugcinwa kwamanzi kwi-masonry mortar kunokuba ngaphantsi, kwaye ngaphezu kwe-80% ingasetyenziswa, njengezitena eziqhelekileyo. ugxothwe ngodaka lwemveli kwimasonry ngempumelelo kakhulu.

Ukuba isakhiwo se-pore se-block block sivaliwe, i-porosity iphezulu, i-block material ayingenanga lula ngamanzi, okanye i-block material ayivumelekanga ukuba ifakwe emanzini ngexesha lokwakhiwa, ngoko ke ukugcinwa kwamanzi kwi-masonry mortar kufuneka. ukwandisa ukufuma kodaka ukuze kuhlangabezene neNdawo efunekayo xa kusenziwa isamente amanzi. Ngokomzekelo, ekwakhiweni kwezitena ze-lime-sand-autoclaved, ukuba i-masonry mortar enezinga lokugcinwa kwamanzi i-80% isetyenziselwa ukwakha izitena ze-lime-sand, ukugcinwa kwamanzi kwi-mortar kuphantsi, kwaye ukufuma kumdaka kulula. ifunxwe ngekalika. Izitena zesanti, ezibangela ukunqongophala okukhulu kwamanzi afunekayo kwi-cement hydration kumalungu odaka, ukwenzela ukuba i-cement hydration ayikwazi ukuqhutyelwa ngokuqhelekileyo, ukunciphisa amandla okwenene odaka kunye namandla okudibanisa udaka kunye nesitena se-lime-sand. . Esi sesinye sezizathu zokuba kulula ukukrazuka udaka lwemveli. Ngoko ke, ukugcinwa kwamanzi omdaka kwizitena zobumba kufuneka kulawulwe ngaphezu kwe-88%.

Nangona kunjalo, ukuba sonyusa izinga lokugcinwa kwamanzi odaka lwezitena zobumba ukuya ngaphezu kwe-95%, kuya kuba nzima ukufunxa ukufuma kwiindawo ezidibeneyo zodaka, amandla okwenene odaka aya kuncipha, kunye namandla obhondi. phakathi kwezitena kunye nodonga nazo ziya kuncipha. Udaka nezitena nazo ziya kuncitshiswa. Ukugcinwa kwamanzi omdaka kukuhle kakhulu, izitena azilula ukunamathela kumdaka ngexesha lokuhlamba, kwaye udaka luzinzile, kunye nokuphakama kwe-masonry kulinganiselwe.

Ngoko ke, ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose kwi-masonry mortar ayikho phezulu kangangoko kunokwenzeka, kwaye izinto ezahlukeneyo zebhloko kufuneka zibe noluhlu olufanelekileyo lokugcinwa kwamanzi.