Ntchito ya redispersible latex ufa mumatope
Pakalipano, monga zinthu zosiyanasiyana zapadera za ufa wa ufa zimavomerezedwa pang'onopang'ono ndikugwiritsidwa ntchito kwambiri, anthu ogwira ntchito amamvetsera ku redispersible latex ufa monga chimodzi mwazowonjezera zamatope apadera a ufa wouma, kotero zizindikiro zosiyanasiyana zawonekera pang'onopang'ono. latex ufa, multipolymer latex powder, resin latex powder, water-based resin latex ufa ndi zina zotero.
The microscopic katundu ndi ntchito zazikulu zaredispersible latex ufamumatope amaphatikizidwa, ndipo zotsatira zina zamaganizo zimawunikidwa. The kanthu limagwirira wa redispersible latex ufa Redispersible latex ufa ndi kukonzekera polima emulsion mu osakaniza kuti angagwiritsidwe ntchito kutsitsi kuyanika powonjezera zina zina, ndiyeno kuwonjezera zoteteza colloid ndi odana-caking wothandizira kuti polima mawonekedwe pambuyo kutsitsi kuyanika. Ufa wopanda madzi wotulukanso m'madzi. The redispersible latex ufa amagawidwa mu matope wowuma wowuma wofanana. Mtondo ukagwedezeka ndi madzi, ufa wa polima umabalalitsidwanso mu slurry wosakaniza mwatsopano ndi emulsified kachiwiri; chifukwa cha hydration ya simenti, evaporation pamwamba ndi kuyamwa kwa maziko wosanjikiza, pores mkati matope ndi ufulu. Kumwa madzi mosalekeza ndi malo amphamvu amchere operekedwa ndi simenti kumapangitsa kuti tinthu ta latex tiwume kuti tipange filimu yosasungunuka yopanda madzi mumatope. Izi mosalekeza filimu aumbike ndi maphatikizidwe limodzi omwazika particles mu emulsion mu homogeneous thupi. Ndi kukhalapo kwa mafilimu a latex omwe amagawidwa mumatope osinthidwa a polima omwe amathandizira kuti matope osinthidwa a polima apeze makhalidwe omwe matope okhwima a simenti sangakhale nawo: chifukwa cha makina odzitambasula a filimu ya latex, akhoza kumangika kumunsi kapena matope Pa mawonekedwe a matope osinthidwa a polima ndi maziko, izi zimatha kupititsa patsogolo matope monga matope osakanikirana ndi maziko osiyana, monga maziko a matope. matailosi a ceramic okwera kwambiri ndi matabwa a polystyrene; Zotsatirazi mkati mwa matope zimatha kuzisunga zonse, mwa kuyankhula kwina, mphamvu yogwirizana ya matope imakhala bwino, ndipo kuchuluka kwa ufa wa latex wowonjezera kuwonjezereka, mphamvu ya mgwirizano pakati pa matope ndi maziko a konkire imakhala bwino kwambiri; Kukwera Kupezeka kwa madera osinthika komanso otanuka kwambiri a polima kunapangitsa kuti matopewo azigwira bwino ntchito komanso kusinthasintha kwa matope, pomwe zotanuka modulus matopewo adatsika kwambiri, zomwe zikuwonetsa kuti kusinthasintha kwake kudasinthidwa. Kanema wa latex amawonedwa mkati mwa matope mu matope osinthika a simenti a polima pazaka zosiyanasiyana. Filimu yopangidwa ndi latex imagawidwa m'malo osiyanasiyana mumatope, kuphatikizapo mawonekedwe apansi-matope, pakati pa pores, kuzungulira khoma la pore, pakati pa mankhwala a simenti a hydration, kuzungulira particles simenti, mozungulira, ndi mawonekedwe ophatikizika-matope. Makanema ena a latex omwe amagawidwa mumatope osinthidwa ndi ufa wa polima wopangidwanso amapangitsa kuti zitheke kupeza zinthu zomwe matope olimba a simenti sangakhale nawo: filimu ya latex imatha kutsekereza ming'alu ya matope pamalo opangira matope ndikulola kuti ming'alu ya shrinkage ichire. Sinthani kusindikizidwa kwa matope. Kupititsa patsogolo mphamvu yolumikizana ya matope: Kukhalapo kwa madera osinthika kwambiri komanso otanuka kwambiri a polima kumapangitsa kuti matopewo asasunthike komanso kuti asasunthike, kumapereka mgwirizano komanso machitidwe amphamvu ku mafupa olimba. Pamene mphamvu ikugwiritsidwa ntchito, mapangidwe a microcrack amachedwa mpaka kupanikizika kwakukulu kufikiridwa chifukwa cha kusinthasintha ndi kusinthasintha. Magawo opindika a polima amalepheretsanso kulumikizana kwa ma microcracks muming'alu yolowera. Choncho, redispersible latex ufa kumawonjezera kulephera kupsinjika ndi kulephera kwa zinthu. Kusintha kwa polima ku matope a simenti kumapangitsa awiriwa kukhala ndi zotsatira zowonjezera, kotero kuti matope osinthidwa a polima angagwiritsidwe ntchito nthawi zambiri zapadera. Komanso, chifukwa cha ubwino youma-kusakaniza matope mu ulamuliro khalidwe, ntchito yomanga, kusungirako ndi kuteteza chilengedwe, redispersible latex ufa amapereka ogwira luso njira kupanga mankhwala apadera youma matope.
Kutengera momwe amapangira ufa wa polima wopangidwanso mumatope, tidayesa mayeso ofananiza kuti titsimikizire momwe zinthu zina zomwe zili pamsika pano, zomwe zimadziwikanso kuti latex powder, mumatope. 1. Zopangira ndi zotsatira zoyesa 1.1 Simenti yazitsulo: Conch Brand 42.5 Ordinary Portland Cement Sand: River Sand, Silicon Content 86%, Fineness 50-100 Mesh Cellulose Ether: Domestic Viscosity 30000-35000mpas (Brookndle2 powder Viscometer), Kashiamu wolemera 6avy, calcium Viscometer carbonate ufa, fineness ndi 325 mesh Latex powder: VAE-based redispersible latex powder, Tg mtengo ndi -7 ° C, apa umatchedwa: redispersible latex ufa Wood fiber: ZZC500 wa JS kampani Ufa wogulitsidwa wa latex ufa: ufa wogulitsidwa wa latex wogulitsidwa, wotchedwa apa: ndondomeko yogulitsa malonda a latex powder test standard 97. (23±2)°C, chinyezi chachibale (50±5)%, kuyesa Kuthamanga kwa mphepo m'derali ndi kosakwana 0.2m/s. Kuumbidwa kukod polystyrene bolodi, kachulukidwe chochuluka ndi 18kg/m3, kudula mu 400×400×5mm. 2. Zotsatira za mayeso: 2.1 Mphamvu yolimba pansi pa nthawi yochiritsira yosiyana: Zitsanzozo zinapangidwa molingana ndi njira yoyesera ya mphamvu ya matope yolimba mu JG149-2003. Njira yochiritsira apa ndi: chitsanzocho chikapangidwa, chimachiritsidwa kwa tsiku limodzi pansi pa zomwe zili mu labotale, ndikuyika mu uvuni wa 50-degree. Sabata yoyamba yoyesera ndi: ikani mu uvuni wa digiri 50 mpaka tsiku lachisanu ndi chimodzi, itulutseni, gwirani mutu woyesera kukoka , Pa tsiku la 7, gulu la mphamvu zokoka linayesedwa. Mayeso mu sabata yachiwiri ndi: ikani mu uvuni wa digiri 50 mpaka tsiku la 13, tulutsani, tulutsani mutu woyesera, ndikuyesa mphamvu zokoka pa tsiku la 14. Mlungu wachitatu, sabata yachinayi. . . ndi zina zotero.
Kuchokera ku zotsatira, tikhoza kuona kuti mphamvu yaredispersible latex ufamumtondo ukuwonjezeka ndi kusunga monga nthawi mu malo kutentha kwambiri ukuwonjezeka, amene ali chimodzimodzi ndi filimu lalabala kuti redispersible latex ufa adzapanga mu matope Chiphunzitsocho n'chogwirizana, ndi nthawi yosungiramo, filimu ya latex ya ufa wa latex idzafika kachulukidwe kena kake, motero kuonetsetsa kuti matope amamatira kumalo apadera a bolodi la EPS. M'malo mwake, malonda a latex powder 97 ali ndi mphamvu zochepa pamene amasungidwa kumalo otentha kwambiri kwa nthawi yaitali. Mphamvu yowononga ya ufa wa latex dispersible ku bolodi la EPS imakhalabe yofanana, koma mphamvu yowononga ya latex powder yomwe ilipo malonda 97 ku bolodi la EPS ikuipiraipira.
Nthawi zambiri, ufa wa latex womwe umapezeka pamalonda ndi ufa wopangidwanso ndi latex uli ndi njira zosiyanasiyana zogwirira ntchito, ndipo ufa wopangidwanso ndi latex ufa, womwe umapanga filimu m'malo osiyanasiyana amatope, umakhala ngati chinthu chachiwiri chopangira matope kuti apititse patsogolo mawonekedwe amatope. Njira yogwirira ntchitoyo ndi yosagwirizana.
Nthawi yotumiza: Apr-25-2024