Ukugcinwa kwamanzi kwe-HPMC odakeni lwamatshe

Njengoba sonke sazi, inkolelo-mbono ye-hydration ephelele kasimende idinga u-26% wesisindo sikasimende, futhi ukusetshenziswa kwamanzi kwangempela kodaka kudlula kakhulu amanzi adingekayo ukuze kufakwe usimende odakeni, okuyinhloko ukuhlangabezana nezidingo zokwakha. Amandla etshe likasimende ahlobene kakhulu nesilinganiso samanzi nosimende. Uma isilinganiso samanzi nosimende siba sikhulu, i-porosity yetshe likasimende iba nkulu, amandla etshe likasimende ayancipha, futhi amandla odaka ayancipha. Ngakho-ke, inqobo nje uma ukusebenza kokugcinwa kwamanzi kwe-masonry mortar kuqinisekisa ukusebenza kwe-mortar kanye nomswakama odingekayo ukuze kufakwe i-hydration ye-cement ku-mortar.

Uma ukugcinwa kwamanzi kodaka lwamatshe kuhle kakhulu, amanzi angempela agcinwe odakeni azoba makhulu, isilinganiso sangempela sikasimende samanzi sodaka sizoba sikhulu, amandla angempela odaka azoba phansi, futhi amandla esibopho. nayo izokwehla. wehlisiwe. Ukwengeza, ukugcinwa kwamanzi odaka kuhle kakhulu, futhi amanzi awamuncwa kalula yi-block material, okuzophinde kuthinte isibopho phakathi kwe-slurry kasimende kanye ne-block material, futhi andise isikhathi sokumisa udaka, ngaleyo ndlela. okuthinta isivinini sokwakha kanye nokwandisa ubunzima bokwakha. Ngakho-ke, inkomba yokugcina amanzi ye-masonry mortar kufanele ihambisane naleyo ye-block material.

Uma isakhiwo se-pore se-block material sivulekile, futhi impahla ye-block ingena kalula emanzini, njengezitini ezishisiwe, ukugcinwa kwamanzi odaka lwamatshe kungaba ngaphansi, futhi okungaphezu kuka-80% kungasetshenziswa, njengezitini ezivamile. kuxoshwe ngodaka lwendabuko lomsebenzi wokwakha ngempumelelo kakhulu.

Uma isakhiwo se-pore se-block material sivaliwe, i-porosity iphezulu, i-block material ayingenanga kalula ngamanzi, noma i-block material ayivunyelwe ukumanziswa ngamanzi ngesikhathi sokwakhiwa, khona-ke ukugcinwa kwamanzi kwe-masonry mortar kufanele. ukwandisa umswakama wodaka ukuze uhlangabezane nesimo Esidingekayo ukuze kufakwe usimende amanzi. Isibonelo, ekwakhiweni kwezitini ze-lime-sand ezi-autoclaved, uma udaka lwe-masonry olunezinga lokugcinwa kwamanzi lwe-80% lusetshenziselwa ukwakha izitini zesihlabathi se-lime, ukugcinwa kwamanzi kodaka kuphansi, futhi umswakama osimende kalula. amuncwa umcako. Izitini zesihlabathi, okuholela ekuntulekeni okukhulu kwamanzi adingekayo ukuze kuhlanganiswe usimende emajoyini odaka, ukuze ukufakwa kukasimende kungenzeki ngendlela evamile, kunciphisa amandla angempela odaka namandla okubopha odaka kanye nesitini se-lime-sand. . Lesi futhi ngesinye sezizathu ezenza kube lula ukuqhekeka kodaka lwendabuko. Ngakho-ke, ukugcinwa kwamanzi kodaka lwezitini zamatshe kufanele kulawulwe ngaphezu kwama-88%.

Kodwa-ke, uma sikhulisa izinga lokugcinwa kwamanzi odaka lwezitini zamatshe kuya ngaphezu kwama-95%, kuyoba nzima ukumunca umswakama emalungeni odaka, amandla angempela odaka azokwehla, futhi amandla esibopho. phakathi kwesitini nodonga nakho kuzokwehla. Udaka nezitini nazo zizoncishiswa. Ukugcinwa kwamanzi odaka kuhle kakhulu, izitini akulula ukunamathela odongeni ngesikhathi sobumba, futhi udaka luzinzile, futhi ukuphakama kwe-masonry kunqunyelwe.

Ngakho-ke, ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose ku-masonry mortar akuphakeme ngangokunokwenzeka, futhi izinto ezihlukene zokuvimba kufanele zibe nobubanzi obufanele bokugcina amanzi.