EPS particle Insulation Mortar ndi zinthu zopepuka zotchinjiriza zomwe zimapangidwa ndi kusakaniza zomangira organic, zomangira organic, zophatikizira, zowonjezera ndi zophatikizira zopepuka mugawo linalake. Pakati pa matope otsekemera a EPS omwe amaphunziridwa ndikugwiritsidwa ntchito panopa, ufa wa latex wopangidwanso umakhudza kwambiri momwe matope amagwirira ntchito, amawerengera kuchuluka kwa mtengo wake, ndipo nthawi zonse wakhala akuyang'anitsitsa. Kulumikizana kwa EPS particle insulation matope kunja kwa khoma kutchinjiriza dongosolo makamaka amachokera polima binder, amene makamaka amapangidwa vinyl acetate/ethylene copolymers. Utsi kuyanika mtundu uwu wa polima emulsion akhoza kutulutsa redispersible latex ufa. Redispersible latex powder yakhala njira yachitukuko pomanga chifukwa chokonzekera bwino, mayendedwe osavuta komanso kusungirako kosavuta. Kuchita kwa matope a EPS particle insulation kumadalira kwambiri mtundu ndi kuchuluka kwa polima wogwiritsidwa ntchito. Ethylene-vinyl acetate powder (EVA) yokhala ndi ethylene yapamwamba komanso otsika Tg (kutentha kwa kutentha kwagalasi) imakhala ndi magwiridwe antchito abwino kwambiri pakulimbitsa mphamvu, mphamvu yomangirira komanso kukana madzi.
Redispersible polima ufa ndi woyera, ali fluidity wabwino, ali yunifolomu tinthu kukula pambuyo dispersibility, ndipo ali dispersibility wabwino. Pambuyo kusanganikirana ndi madzi, ndi latex ufa particles akhoza kubwerera ku chikhalidwe chawo choyambirira emulsion ndi kukhalabe makhalidwe ndi ntchito monga organic binder. Udindo wa ufa wa polima wopangidwanso mumatope otsekemera amayendetsedwa ndi njira ziwiri: simenti ya hydration ndi mapangidwe a filimu ya polima. Njira yophatikizira yopangira simenti ya simenti ndi kupanga filimu ya ufa wa polima imamalizidwa ndi njira zinayi izi:
(1) Pamene ufa wa latex umasakanizidwa ndi matope a simenti, tinthu tating'onoting'ono ta polima timene timabalalitsidwa mofanana mu slurry.
(2) simenti gel osakaniza pang'onopang'ono aumbike mu polima / simenti phala mwa hydration simenti, ndi madzi gawo ali zimalimbikitsa kashiamu hydroxide anapanga pa hydration ndondomeko, ndi polima particles waikamo pa gawo la pamwamba pa simenti gel osakaniza / unhydrated. simenti tinthu osakaniza.
(3) Pamene mawonekedwe a gel osimenti akukula, madzi amadyedwa ndipo tinthu tating'onoting'ono timatsekeredwa m'ma capillaries. Pamene simenti kumawonjezera hydrates, madzi capillaries amachepetsa ndi polima particles kusonkhana padziko simenti gel osakaniza / unhydrated simenti tinthu osakaniza ndi kuwala aggregates, kupanga mosalekeza ndi mwamphamvu ankanyamula wosanjikiza. Panthawiyi, ma pores akuluakulu amadzazidwa ndi tinthu tating'onoting'ono ta polima.
(4) Pansi pa zochita za simenti hydration, m'munsi mayamwidwe ndi pamwamba evaporation, okhutira chinyezi ndi zina yafupika, ndi polima particles mwamphamvu zakhala zikuzunza m'miyoyo pa simenti hydrate akaphatikiza mu filimu mosalekeza, bonding mankhwala hydration pamodzi kupanga wathunthu maukonde dongosolo. , ndipo gawo la polima limalowetsedwa mu simenti ya hydration slurry.
Cement hydration ndi latex powder film-forming composition amapanga kachipangizo katsopano kaphatikizidwe, ndipo kuphatikizika kwawo kumawongolera ndikuwonjezera magwiridwe antchito a matope otsekemera otenthetsera.
Zotsatira za polima ufa kuwonjezera pa matenthedwe kutchinjiriza matope mphamvu
Kusinthasintha kwambiri komanso zotanuka kwambiri polima ma mesh membrane wopangidwa ndi latex ufa amathandizira kwambiri magwiridwe antchito a matope otsekemera, makamaka mphamvu zamakomedwe zimakhala bwino kwambiri. Mphamvu yakunja ikagwiritsidwa ntchito, kuchitika kwa ming'alu yaying'ono kumachepetsedwa kapena kuchepetsedwa chifukwa cha kuwongolera kwa mgwirizano wonse wamatope komanso kukhazikika kwa polima.
Kulimba kwamphamvu kwa matope otsekemera otenthetsera kumawonjezeka ndi kuchuluka kwa ufa wa polima; mphamvu ya flexural ndi mphamvu yopondereza imachepa pang'onopang'ono ndi kuwonjezeka kwa ufa wa latex, koma imatha kukwaniritsa zofunikira za kunja kwa khoma. Kupindika kwa compression ndikocheperako, komwe kumawonetsa kuti matope otsekemera amatenthetsa amakhala ndi kusinthasintha kwabwino komanso magwiridwe antchito.
Zifukwa zazikulu zomwe polima ufa bwino kumakokedwa mphamvu ndi: pa coagulation ndi kuumitsa ndondomeko matope, polima adzakhala gel osakaniza ndi kupanga filimu mu zone kusintha pakati pa EPS particles ndi simenti phala, kupanga mawonekedwe pakati awiri owuma ndi amphamvu; gawo lina la polima limamwazikana mu phala la simenti ndi kusinthidwa kukhala filimu pamwamba pa simenti ya hydrate gel osakaniza kupanga polima maukonde. Izi otsika zotanuka modulus polima maukonde bwino kulimba kwa oumitsa simenti; magulu ena a polar mu ma polima mamolekyu amathanso kuchitapo kanthu ndi mankhwala ndi simenti ya hydration kuti apange zotsatira zapadera zomangirira, potero kuwongolera kapangidwe ka zinthu za simenti ya hydration ndikuchepetsa kupsinjika kwamkati, potero kuchepetsa kubadwa kwa ma microcracks mu phala la simenti.
Zotsatira za mulingo wa ufa wa polima wopangidwanso pakugwira ntchito kwa EPS matope otsekemera amafuta
Ndi kuwonjezeka kwa mlingo wa latex ufa, kugwirizana ndi kusunga madzi kumakhala bwino kwambiri, ndipo ntchito yogwira ntchito imakongoletsedwa. Mlingo ukafika 2.5%, ukhoza kukwaniritsa zofunikira zomanga. Ngati mlingowo ndi wochuluka kwambiri, kukhuthala kwa EPS matope otsekemera ndi okwera kwambiri ndipo madzi amadzimadzi ndi otsika, omwe sali oyenerera kumanga, ndipo mtengo wamatope umawonjezeka.
Chifukwa chomwe ufa wa polima umakhathamiritsa kugwira ntchito kwa matope ndikuti ufa wa polima ndi ma polima apamwamba okhala ndi magulu a polar. Pamene ufa wa polima umasakanizidwa ndi tinthu tating'ono ta EPS, magawo omwe si a polar mu unyolo waukulu wa ufa wa polima adzalumikizana ndi tinthu tating'onoting'ono ta EPS. Kutsatsa kwakuthupi kumachitika pamtunda wopanda polar wa EPS. The magulu polar mu polima ndi zochokera kunja pamwamba pa EPS particles, kupanga EPS particles kusintha kuchokera hydrophobic kuti hydrophilic. Chifukwa cha kusintha kwa ufa wa latex pamwamba pa EPS particles, vuto lomwe ma EPS amawonekera mosavuta m'madzi amathetsedwa. Vuto lakuyandama komanso kusanjika kwamatope akulu. Pamene simenti anawonjezera ndi kusakaniza pa nthawi ino, magulu polar adsorbed pamwamba pa EPS particles kucheza ndi simenti ndi kwambiri pamodzi, potero kwambiri kuwongolera workability wa EPS kutchinjiriza matope matope. Izi zikuwonekera mu mfundo yakuti ma EPS particles amanyowetsedwa mosavuta ndi slurry ya simenti, ndipo mphamvu yogwirizanitsa pakati pa ziwirizi imakhala bwino kwambiri.
Redispersible polima ufa ndi gawo lofunika kwambiri la magwiridwe antchito apamwamba a EPS particle insulation slurry. Limagwirira ake zochita makamaka kuti polima particles mu dongosolo aggregate mu mosalekeza filimu, kugwirizana ndi mankhwala simenti hydration pamodzi kupanga wathunthu maukonde dongosolo ndi mwamphamvu kaphatikizidwe ndi EPS particles. Dongosolo lophatikizika la ufa wopangidwanso wa polima ndi zomangira zina zimakhala ndi zofewa zofewa, zomwe zimathandizira kwambiri kulimba kwamakokedwe komanso ntchito yomanga ya EPS particle kutchinjiriza matope.
Nthawi yotumiza: Dec-30-2024