Kubwezeretsedwanso ndi ufa wa latx ndi zinthu zomwe zimagwiritsidwa ntchito kawirikawiri. Ndi ufa womwe umapezeka ndi utsi wowumitsa elilsion ndi mowa wa polyvinyl ngati colloid colloid. Ufa uwu umatha kuphatikizidwanso m'madzi ngakhale kukumana ndi madzi. , kupanga emulsion. Kuphatikiza kwa kufalitsa ufa wa polima kumatha kukonza matope osungirako madzi a simenti atsopano a simenti yatsopano, komanso kugwiriridwa, kusinthasintha ndi kuwonongeka kwa matope a simenti. Otsatirawa amayambitsa makina obwezeretsera ufa mu matope a simenti komanso chisonkhezero pa matope a simenti.
Zotsatira za simenti hydration njira ndi kapangidwe kake
Malingana ngati gawo la simentale lomwe limawonjezeredwa ndi ufa wa latedx Madzi, ma cecraum hydroxide amayamba, ndipo nthawi yomweyo, polyrolizations pa emulsion tinthu tating'onoting'ono tosiyanasiyana. Popita patsogolo kwa mankhwala othandizana ndi kuchitira mankhwala ochulukirachulukira, ndipo zinthu zothandizirana zimakula pang'onopang'ono m'mapazi a capillary ndikupanga chovala chapafupi kwambiri pamtunda wa gel osavuta. Tinthu tating'onoting'ono tambiri tadzaza ma pores, koma sanathe kudzaza kwathunthu pa pores. Monga hydration kapena kuyanika kumachepetsa chinyezi chowonjezereka chodzaza ndi gel osakaniza kukhala filimu yopitilira, ndikusintha njira hydration kugwirizanitsa. Chifukwa chakuti mankhwala osokoneza bongo ndi polymer amapangira chophimba pamawonekedwe, zitha kukhudza kukula kwa ettingrite ndi coarch calkroxide makhistali; Komanso chifukwa amalumikizana ndi polima mu filimuyo mu ma pores oyambira malo osinthira, zomwe zimapangitsa kuti malo ogulitsira a Polymer Spentition Malo ogulitsa ndi olemera. Magulu ogwira ntchito mamolekyu ena a polymer amakhalanso ndi can +, A13 +, ndi zina mwa zinthu zolimba, zomwe zimapangitsa kupsinjika kwamkati, kuchepetsedwa kupsinjika kwa microcracks. Monga mawonekedwe a simenti a simenti amayamba, madziwo amadzaza ndipo mapepala a polymer amangokhala m'manerapo a capillary. Popitilira ma simenti, madzi omwe ali m'maso a capillary amachepetsa, ndipo ma polymer tinthu tating'onoting'ono tomwe timasakaniza ndi ma poreya akuluakulu osakanikirana ndi ma pores omata kapena odzipereka a polymer.
Udindo wobalalitsa ufa wa matope mu matope amawongoleredwa ndi njira ziwiri za simenti hydration ndi poizoni wa pollymer. Kupanga kwa dongosolo lophatikizira kwa simenti hydration ndi polymer finect amakwaniritsidwa m'masitepe 4:
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Kubalalitsa emulsion obwezeretsedwa polima amatha kupanga filimu yokhazikika ya madzi (netchmer network) mutatha kuyanika, ndipo izi solustic soduzus polymes network imatha kukonza simenti yamayendedwe; Magulu ena a polar a simenti amatenga mankhwala ndi simentart hydraction chopangira cholumikizira, chomwe chimathandiza kapangidwe kake ka simenti hydrate zopangidwa ndi ming'alu. Pambuyo pokwezedwa polima polder amawonjezeredwa, kuchuluka koyambirira kwa simenti kumachedwetsedwa, ndipo filimuyo imatha pang'ono kapena kukulunga tating'onoting'ono, kuti simenti itha kukhala hydration kwathunthu ndipo malo ake osiyanasiyana amatha kusintha.
Mphamvu yamphamvu ya zolimba za zinthu za simenti
Emulsion ndikumwaza ufa wa polima amatha kupanga mphamvu zapamwamba kwambiri ndikulimbana ndi zida zosiyanasiyana pambuyo popanga filimu. Amaphatikizidwa ndi simenti ya zonunkhira ngati bande yachiwiri ku matope. Simenti ndi polymer amaperekanso nthawi yolingana ndi zofananira, kuti mapangidwe a matope atha kusintha. Mwa kuona micrestruction wa simenti yopanga simenti yopanga, imakhulupirira kuti kuwonjezera kwa ufa wobwezeredwa kungapangitse filimuyo ndikukhala gawo la khoma la pore. Mphamvu yowonjezera, potero ikuwonjezera kulephera kwa matope ndikuwonjezera zovuta zonse. Kugwirira ntchito nthawi yayitali kwa polima polima mu matope adaphunzitsidwa. Zinawonedwa ndi Semu kuti patatha zaka 10, micrestrucy ya polymer yomwe ili mu matopewo sanasinthe, kubisala modekha, kukana kwathunthu. Mphamvu ndi zabwino hydrobicity. Wang zimining et al. [11] adaphunzira mapangidwe opangidwa ndi ufa wamphamvu wa zomata za mataile, ndipo adapeza kuti polymer adapanga chitoliro pakati pa matope ndikusokoneza mapangidwe, ndipo pambuyo pake. Kukhazikitsa, polymer amathandiziranso ku hydratic njira ndi shrinkage ya simenti mu binder. Zotsatira zabwino kwambiri, zonse zomwe zingathandize bwino kukonza mphamvu yolimba.
Kuwonjezera ufa wokwezeka wa latx ku matope kungathandize kwambiri kuti mukhale ndi mphamvu ndi zinthu zina, chifukwa gawo la hydrophilic limalowa mu ma pores pamodzi, ndipo ma capillaries amalowa mu ma pores ndi capillaries. Kanema wamkati amapangidwa ndikuwasokoneza pansi pa gawo lapansi, potero kuwonetsetsa kulimba mtima pakati pa zinthu za Cemement ndi gawo lapansi.
Kutha kwa matope a matope mwa ufa wa latx ufa ndikuti ufa wa latedx ndi polar polar. Pamene ufa wa latx ukasakanikirana ndi ma eps, zigawo zosakhala pormer mu polymer zikuluzikulu za matex ufa wa latex ndi zotsatsa zakuthupi zidzachitika ndi polar ya eps. Magulu a Polar mu polymer amadzimangirira kunja kwa ma eps tinthu tambiri, kotero kuti ma eps tinthu a epsphobicity to hydrophicity. Kuyandama, vuto la matope ambiri. Pakadali pano, kuwonjezera simenti ndikusakaniza, mapangidwe a polarbed pamwamba pa eps tinthu tating'onoting'ono timacheza ndi simenti komanso kugwirizira matope othandiza kwambiri. Izi zimawonekera kuti tinthu ta eps zimanyowa mosavuta ndi simenti slorry, ndipo mphamvu yomanga pakati pa ziwirizi zasintha kwambiri.
Kutengera kusinthika kwa zinthu za simenti
Ufa wokwezeka wa latx umatha kusintha mphamvu zothekera, mphamvu zotsatsa ndi zida zina za matope chifukwa imatha kupanga filimu ya polymer pamwamba pa matope. Pali pores pamtunda wa filimuyi, ndipo pamwamba pa ma pores zimadzaza ndi matope, kuti kupsinjika kudalira kumachepetsedwa. Ndipo mothandizidwa ndi mphamvu yakunja idzatulutsa mpumulo popanda kuwonongeka. Kuphatikiza apo, matope amapanga mafupa okhazikika simenti itatha, ndipo polymer mu skeleton ali ndi ntchito yolumikizana, yofananira ndi minofu ya munthu. Kanema wopangidwa ndi polymer angafanane ndi mafupa ndi zingwe, ndikuonetsetsa kuti zotanuka komanso unyinji.
Mu matope osinthika a Polymer, filimu yopitilira muyeso imagwirizana ndi tinthu tating'onoting'ono, ndikupanga zolemetsa zonse, ndipo nthawi yomweyo kudzaza ma capillaries ndi zikwangwani kuti zipangitse bwino. Chifukwa chake, kanema wa polymer amatha kupatsira mavuto komanso mavuto ambiri. Kanema wa polymer amatha kugwedezeka kwa ma shrinmer pa mawonekedwe a polymer, kupanga matonthoza, ndikusintha panyanjapo komanso kuchuluka kwa matope. Kukhalapo kwa maulamuliro osinthika kwambiri komanso owoneka bwino kwambiri kumathandiza kusintha matope ndi kutukwana kwa matope, kupereka chilengedwe komanso chochititsa chidwi ku mafupa olimba. Mphamvu yakunja ikagwiritsidwa ntchito, njira zofalitsira microcrocky zimachedwa chifukwa cha kusinthaku ndikusintha mpaka kupsinjika kwakukulu kumafikiridwa. Maofesi a polymer omwe adaphatikizidwanso amatenganso gawo loletsa kuphatikiza ma microcracks omwe akudutsa. Chifukwa chake, kufalikira kwa polima polima kumawonjezera nkhawa komanso kulephera kwa zinthuzo.
Kukopa kukhazikika kwa zinthu za simenti
Kupanga kwa polymer opitilira mafilimu ndikofunikira kwambiri ku katundu wa maphero a simenti osasinthika. Panthawi ya makonzedwe ndi kuuma kwa simenti, mizere yambiri idzapangidwa mkati, yomwe imakhala mbali zofooka za simenti. Pambuyo pa ufa wokwezedwa polima umawonjezeredwa, ufa wa polymer nthawi yomweyo umabalalitsa polumikizana ndi madzi, ndikudziunjikira m'madzi olemera (mwachitsanzo, mumphika). Monga phala la simenti ndikulimba, kusuntha kwa tinthu tating'onoting'ono kumachepa komanso kungokhala pakati pa madzi ndi mpweya kumawapangitsa kuti azitsatira pang'onopang'ono. Tikakhala tinthu tating'onoting'ono timene timayamba kulumikizana, madzi omwe ali paukonde amatuluka kudzera m'mapiloni, ndipo polima amapanga mafilimu mosalekeza mozungulira, kumalimbikitsa mawanga ofooka. Pakadali pano, kanema wa polymer sangangosewera ntchito ya hydrophobic, komanso sangatsekeretse capillary, kuti zinthuzo zikhale ndi hydrophobicity ndi mpweya wabwino.
Matope a simenti osawonjezera polymer ndiolumikizidwa kwambiri. M'malo mwake, matope a polymer osinthika amapangitsa kuti matope athunthu azilumikizana kwambiri chifukwa cha kupezeka kwa filimu ya polymer, motero kupeza mphamvu zabwino komanso kukana kwanyengo. Kugonana. Mu matope a matope osinthika a chaterx, ufa wa mated Pambuyo pa ufa wa latex utapangidwa mu filimu, matope mu matope amatha kutsekedwa bwino, kuti mawonekedwe a malo osinthira a simenti osinthika, ndikutha kukana kukokoloka kwa media kumatha. Zimakhala ndi zotsatira zabwino pakusintha kwa kukhazikika kwa kukhazikika kwa matope.
Pakadali pano, osamwa polima polima amatenga gawo lofunikira monga zowonjezera pamatope omanga. Kuwonjezera ufa wokwezeka wa matope amatha kukonza matope osiyanasiyana monga matayala omata, matope odzilimbitsa, ndikupanga matope ophatikizika, kukonza matonge matope komanso zinthu zopindika. Ntchito ndi ntchito yopanga matope. Zachidziwikire, pali zovuta za kusintha pakati pa osasinthika polima ufa ndi simenti, admentictures ndi ma admictichetures, omwe amayenera kupatsidwa chisamaliro chokwanira pamapulogalamu enaake.
Post Nthawi: Feb-20-2025