Lapho nje izinto ezisekelwe kusimende ezifakwe nge-latex powder zihlangana namanzi, ukusabela komswakama kuqala, futhi isisombululo se-calcium hydroxide sifinyelela ngokushesha ekugcwaleni futhi amakristalu ayakhukhuleka, futhi ngasikhathi sinye, kwakheka amakristalu e-ettringite namajeli e-calcium silicate hydrate. Izinhlayiya eziqinile zifakwa kujeli kanye nezinhlayiya zesamente ezingamanzi. Njengoba ukusabela komswakama kuqhubeka, imikhiqizo yomswakama iyanda, futhi izinhlayiya ze-polymer ziqoqana kancane kancane kuma-capillary pores, zakha ungqimba olugcwele kakhulu ebusweni bejeli kanye nezinhlayiya zesamente ezingamanzi.
Izinhlayiya ze-polymer ezihlanganisiwe zigcwalisa kancane kancane izimbobo, kodwa hhayi ngokuphelele ebusweni bangaphakathi bezimbobo. Njengoba amanzi encishiswa kakhulu ukumuncwa noma ukomiswa, izinhlayiya ze-polymer ezinamathele kakhulu kujeli nasemaphoreni ziyahlangana zibe ifilimu eqhubekayo, zakha ingxube ehlanganayo ne-hydrated cement paste kanye nokuthuthukisa ukumuncwa Ukuhlanganiswa kwemikhiqizo nama-aggregates. Ngenxa yokuthi imikhiqizo yokumuncwa enama-polymers yakha ungqimba olumbozayo esixhumi, kungathinta ukukhula kwamakristalu e-ettringite nama-coarse calcium hydroxide; futhi ngenxa yokuthi ama-polymers ahlangana abe amafilimu ezimbobeni zendawo yokuguquka kwesixhumi, izinto ezisekelwe kusimende se-polymer Indawo yokuguquka iyinkimbinkimbi. Amaqembu asebenzayo kwamanye ama-molecule e-polymer azophinde akhiqize ukusabela okuxhumanisayo ne-Ca2+ kanye ne-A13+ emikhiqizweni yokumuncwa kwesimende ukuze kwakhiwe izibopho ezikhethekile zebhuloho, kuthuthukiswe isakhiwo somzimba sezinto ezisekelwe kusimende eziqinile, kuncishiswe ukucindezeleka kwangaphakathi, futhi kuncishiswe ukukhiqizwa kwemifantu emincane. Njengoba isakhiwo sejeli yesimende sikhula, amanzi ayadliwa futhi izinhlayiya ze-polymer zigcinwa kancane kancane ezimbobeni. Njengoba usimende uqhubeka nokuba namanzi, umswakama kuma-capillary pores uyancipha, futhi izinhlayiya ze-polymer zihlangana phezu komkhiqizo we-simende we-hydration gel/ingxube yezinhlayiya ze-simende ezingamanzi kanye ne-aggregate, ngaleyo ndlela zakha ungqimba oluhlala luqinile olunezinhlayiya ezinkulu Ezigcwele izinhlayiya ze-polymer ezinamathelayo noma ezinamathelayo.
Indima yempuphu ye-latex ephinde ihlakazeke ku-mortar ilawulwa yizinqubo ezimbili zokufuthwa kwe-samente kanye nokwakheka kwefilimu ye-polymer. Ukwakheka kohlelo oluhlanganisiwe lokufuthwa kwe-samente kanye nokwakheka kwefilimu ye-polymer kuqedwa ngezinyathelo ezine:
(1) Ngemva kokuba i-latex powder ephinde ihlakazeke ixutshwe nodaka lukasimende, ihlakazeka ngokulinganayo ohlelweni;
(2) Izinhlayiya ze-polymer zibekwe phezu kwejeli yomkhiqizo we-hydration yesimende/ingxube yezinhlayiya zesimende ezingenamanzi;
(3) Izinhlayiya ze-polymer zakha ungqimba oluqhubekayo noluncane oluhlanganisiwe;
(4) Ngesikhathi senqubo yokumunca usimende, izinhlayiya ze-polymer ezihlanganiswe eduze zihlangana zibe ifilimu eqhubekayo, zibopha imikhiqizo yokumunca ndawonye ukuze kwakheke isakhiwo senethiwekhi esiphelele.
I-emulsion ehlakazekile yempuphu ye-latex ephinde ihlakazwe ingakha ifilimu eqhubekayo engancibiliki emanzini (umzimba wenethiwekhi ye-polymer) ngemva kokomiswa, futhi lo mzimba wenethiwekhi ye-polymer ye-modulus ephansi enwebekayo ungathuthukisa ukusebenza kwe-samente; ngesikhathi esifanayo, ku-molecule ye-polymer. Amaqembu athile e-polar ku-samente asabela ngamakhemikhali nemikhiqizo ye-samente hydration ukuze akhe amabhuloho akhethekile, athuthukise isakhiwo somzimba semikhiqizo ye-samente hydration, futhi anciphise futhi anciphise ukuvela kwemifantu. Ngemva kokuthi i-latex powder ephinde ihlakazwe ingeziwe, izinga lokuqala le-hydration ye-samente liyehla, futhi ifilimu ye-polymer ingasonga kancane noma ngokuphelele izinhlayiya ze-samente, ukuze i-samente ikwazi ukumanziswa ngokugcwele futhi izakhiwo zayo ezahlukahlukene zithuthukiswe.
Impuphu ye-latex ephinde ihlakazeke idlala indima ebalulekile njengesithasiselo ku-mortar yokwakha. Ukufaka i-latex powder ephinde ihlakazeke ku-mortar kungalungisa imikhiqizo ehlukahlukene ye-mortar efana ne-tile adhesive, i-thermal insulation mortar, i-self-leveling mortar, i-putty, i-plastering mortar, i-decorative mortar, i-jointing agent, i-repair mortar kanye nezinto zokuvala ezingangeni manzi, njll. Ububanzi bokusetshenziswa kanye nokusebenza kwe-mortar yokwakha. Yiqiniso, kunezinkinga zokuzivumelanisa nezimo phakathi kwe-latex powder ephinde ihlakazeke kanye ne-cement, i-admixtures kanye ne-admixtures, okufanele zinikezwe ukunakwa okwanele ekusetshenzisweni okuthile.
Isikhathi sokuthunyelwe: Mashi-14-2023