Udindo wa ufa wa latex wosungunukanso mu matope
Pakadali pano, pamene zinthu zosiyanasiyana zapadera za matope owuma zikulandiridwa pang'onopang'ono ndikugwiritsidwa ntchito kwambiri, anthu omwe ali mumakampaniwa amasamala za ufa wa latex wosungunukanso ngati chimodzi mwa zowonjezera zazikulu za matope apadera owuma, kotero zinthu zosiyanasiyana zawonekera pang'onopang'ono: ufa wa latex, ufa wa latex wambiri, ufa wa latex wa resin, ufa wa latex wopangidwa ndi madzi ndi zina zotero.
Kapangidwe ka microscopic ndi magwiridwe antchito a macroscopicufa wa latex wosungunukansoMu matope amaphatikizidwa, ndipo zotsatira zina zamaganizo zimasanthulidwa. Njira yogwirira ntchito ya ufa wa latex wothiranso Ufa wa latex wothiranso ndi kukonzekera emulsion ya polymer kukhala chisakanizo chomwe chingagwiritsidwe ntchito poumitsira popopera powonjezera zowonjezera zosiyanasiyana, kenako ndikuwonjezera colloid yoteteza komanso yoletsa kuyika kuti apange mawonekedwe a polymer pambuyo poumitsira popopera. Ufa woyenda momasuka ukhoza kusungunukanso m'madzi. Ufa wa latex wothiranso umagawidwa mu matope ouma osakanikirana mofanana. Pambuyo poti matopewo asakanikizidwe ndi madzi, ufa wa polymer umasungunukanso mu slurry yosakanikirana yatsopano ndikusungunukanso; chifukwa cha madzi a simenti, kutuluka kwa madzi pamwamba ndi kuyamwa kwa gawo loyambira, ma pores mkati mwa matopewo ndi aulere. Kugwiritsa ntchito madzi mosalekeza komanso malo amphamvu amchere omwe amaperekedwa ndi simenti kumapangitsa tinthu ta latex kuumitsa kuti tipange filimu yopitilira yosasungunuka m'madzi. Filimu yopitilira iyi imapangidwa ndi kusakanikirana kwa tinthu tating'onoting'ono tomwe timafalikira mu emulsion kukhala thupi lofanana. Ndi kukhalapo kwa mafilimu a latex omwe amagawidwa mu matope osinthidwa a polymer omwe amalola matope osinthidwa a polymer kupeza makhalidwe omwe matope olimba a simenti sangakhale nawo: chifukwa cha njira yodzitambasulira yokha ya filimu ya latex, imatha kumangiriridwa ku maziko kapena matope Pamalo olumikizira matope osinthidwa a polymer ndi maziko, izi zitha kusintha magwiridwe antchito a matope ndi maziko osiyanasiyana, monga kumatira kwa maziko apadera monga matailosi a ceramic okwera kwambiri ndi ma board a polystyrene; Zotsatirazi mkati mwa matope zimatha kusunga zonse, mwa kuyankhula kwina, mphamvu yogwirizana ya matope imawonjezeka, ndipo pamene kuchuluka kwa ufa wa latex wosungunukanso kumawonjezeka, mphamvu yolumikizana pakati pa matope ndi maziko a konkriti imawonjezeka kwambiri; Kukwera Kupezeka kwa madera a polymer osinthasintha komanso otanuka kwambiri kunasintha kwambiri magwiridwe antchito ogwirizana ndi kusinthasintha kwa matope, pomwe modulus yotanuka ya matope yokha idachepa kwambiri, kusonyeza kuti kusinthasintha kwake kunawonjezeka. Filimu ya latex yomwe idawonedwa mkati mwa matope mu matope osinthidwa a polymer pazaka zosiyanasiyana. Filimu yopangidwa ndi latex imagawidwa m'malo osiyanasiyana mu matope, kuphatikizapo malo olumikizirana a base-mortar, pakati pa ma pores, kuzungulira khoma la pores, pakati pa zinthu zosungunulira simenti, kuzungulira tinthu ta simenti, kuzungulira aggregate, ndi malo olumikizirana a aggregate-mortar. Mafilimu ena a latex omwe amagawidwa mu matope osinthidwa ndi ufa wa polymer wosungunukanso amachititsa kuti zikhale zotheka kupeza zinthu zomwe matope olimba a simenti sangakhale nazo: filimu ya latex imatha kulumikiza ming'alu yocheperako pa malo olumikizirana a base-mortar ndikulola ming'alu yocheperako kuchira. Kulimbitsa kutseka kwa matope. Kuwongolera mphamvu yogwirizana ya matope: Kukhalapo kwa madera a polymer osinthasintha kwambiri komanso otanuka kwambiri kumawongolera kusinthasintha ndi kulimba kwa matope, kupereka mgwirizano ndi machitidwe amphamvu ku mafupa olimba. Mphamvu ikagwiritsidwa ntchito, mapangidwe a microcrack amachedwa mpaka kupsinjika kwakukulu kufikika chifukwa cha kusinthasintha komanso kulimba. Ma madera a polymer olumikizidwa amalepheretsanso kuphatikizika kwa microcracks mu ming'alu yolowera. Chifukwa chake, ufa wa latex wosungunukanso umawonjezera kupsinjika kwa kulephera ndi kupsinjika kwa zinthuzo. Kusintha kwa polima kukhala matope a simenti kumapangitsa kuti awiriwa akhale ndi zotsatira zofanana, kotero kuti matope osinthidwa a polima angagwiritsidwe ntchito nthawi zambiri zapadera. Kuphatikiza apo, chifukwa cha ubwino wa matope osakaniza ndi madzi powongolera khalidwe, ntchito yomanga, kusungirako ndi kuteteza chilengedwe, ufa wa latex wosungunukanso umapereka njira yothandiza kwambiri yopangira zinthu zapadera za matope ouma.
Kutengera ndi momwe ufa wa polima wosungunukanso mu matope, tinachita mayeso ena ofanana kuti titsimikizire momwe chinthu china chomwe chili pamsika, chomwe chimadziwikanso kuti ufa wa latex, chimagwirira ntchito mu matope. 1. Zipangizo zopangira ndi zotsatira za mayeso 1.1 Simenti ya zinthu zopangira: Conch Brand 42.5 Mchenga wa Simenti wa Portland: Mchenga wa Mtsinje, Silicon Content 86%, Fineness 50-100 Mesh Cellulose Ether: Kukhuthala kwa Pakhomo 30000-35000mpas (Brookfield Viscometer, Spindle 6, Speed 20) Ufa wolemera wa calcium: ufa wolemera wa calcium carbonate, fineness ndi 325 mesh Ufa wa Latex: Ufa wa latex wosungunuka wochokera ku VAE, Tg value ndi -7°C, apa amatchedwa: ufa wa latex wosungunuka Ulusi wamatabwa: ZZC500 wa kampani ya JS Ufa wa latex wogulitsidwa m'masitolo: ufa wa latex wogulitsidwa m'masitolo, wotchedwa pano: ufa wa latex wogulitsidwa m'masitolo 97. Fomula yoyesera yamakina ndi iyi: Mikhalidwe yoyesera yokhazikika ya labotale: kutentha (23±2)°C, chinyezi (50±5)%, mayeso Liwiro la mphepo yozungulira m'derali ndi lochepera 0.2m/s. Bolodi la polystyrene lopangidwa ndi utomoni, kuchuluka kwake ndi 18kg/m3, lodulidwa mu 400×400×5mm. 2． Zotsatira za mayeso: 2.1 Mphamvu yolimba pansi pa nthawi yosiyana yolimba: Zitsanzozo zinapangidwa motsatira njira yoyesera ya mphamvu yolimba yolimba ya matope mu JG149-2003. Dongosolo lolimba apa ndi ili: chitsanzocho chikapangidwa, chimachiritsidwa kwa tsiku limodzi pansi pa mikhalidwe yokhazikika ya labotale, kenako nkuyikidwa mu uvuni wa madigiri 50. Sabata yoyamba yoyesa ndi iyi: chiyikeni mu uvuni wa madigiri 50 mpaka tsiku lachisanu ndi chimodzi, chitulutseni, chiyikeni mutu woyesera wotulutsa, Pa tsiku lachisanu ndi chiwiri, gulu la mphamvu yotulutsa linayesedwa. Mayeso mu sabata yachiwiri ndi awa: chiyikeni mu uvuni wa madigiri 50 mpaka tsiku la 13, chitulutseni, chiyikeni mutu woyesera wotulutsa, ndikuyesa gulu la mphamvu yotulutsa pa tsiku la 14. Sabata lachitatu, sabata lachinayi. . . ndi zina zotero.
Kuchokera ku zotsatira zake, titha kuwona kuti mphamvu yaufa wa latex wosungunukansoMu matope, nthawi yosungiramo zinthu imawonjezeka ndipo imasungidwa pamene kutentha kumawonjezeka, zomwe ndi zofanana ndi filimu ya latex yomwe ufa wa latex wosungunukanso umapangidwa mu matope. Chiphunzitsochi ndi chogwirizana, nthawi yosungira ikachuluka, filimu ya latex ya ufa wa latex imafika pamlingo winawake, motero kuonetsetsa kuti matopewo amamatira pamwamba pa bolodi la EPS. M'malo mwake, ufa wa latex 97 womwe umapezeka m'masitolo uli ndi mphamvu zochepa chifukwa umasungidwa pamalo otentha kwambiri kwa nthawi yayitali. Mphamvu yowononga ya ufa wa latex wosungunuka ku bolodi la EPS imakhalabe yomweyo, koma mphamvu yowononga ya ufa wa latex 97 womwe umapezeka m'masitolo ku bolodi la EPS ikuipiraipira.
Kawirikawiri, ufa wa latex womwe umapezeka m'masitolo ndi ufa wa latex womwe umatha kusungunuka uli ndi njira zosiyanasiyana zogwirira ntchito, ndipo ufa wa latex womwe umatha kusungunuka, womwe umapanga filimu m'magawo osiyanasiyana a matope, umagwira ntchito ngati chinthu chachiwiri chopangira gelling kuti chiwongolere mawonekedwe a matope. Kagwiridwe ka ntchito ka matopewo sikofanana.
Nthawi yotumizira: Epulo-25-2024