Kodi mitundu yosiyanasiyana ya matope owuma ndi iti? Kugwiritsa ntchito redispersible latex ufa

Dothi la ufa wowuma limatanthawuza chinthu chopangidwa ndi granular kapena ufa wopangidwa ndi kusanganikirana kwamagulu, zida za simenti, ndi zowonjezera zomwe zawumitsidwa ndikuwunikiridwa mu gawo linalake. Kodi zowonjezera zomwe zimagwiritsidwa ntchito kwambiri pamatope owuma ndi ati? Dothi la ufa wouma nthawi zambiri limagwiritsa ntchito simenti ya Portland ngati simenti, ndipo kuchuluka kwa simenti nthawi zambiri kumakhala 20% mpaka 40% yamatope owuma; Zophatikiza zabwino zambiri ndi mchenga wa quartz ndipo zimafunikira chithandizo chochuluka chisanadze monga kuyanika ndi kuunika kuti zitsimikizidwe kuti kukula kwake kwa tinthu tating'ono ndi khalidwe zimakwaniritsa zofunikira za chilinganizo; Nthawi zina phulusa la ntchentche, ufa wa slag, ndi zina zambiri zimawonjezeredwa ngati zosakaniza; Zosakaniza zimagwiritsidwa ntchito pang'onopang'ono, kuyambira 1% mpaka 3%, koma zimakhala ndi zotsatira zazikulu. Nthawi zambiri amasankhidwa molingana ndi zofunikira za mankhwalawo kuti apititse patsogolo kugwira ntchito, kusanjika, mphamvu, kuchepa, komanso kukana chisanu kwa matope.

Ndi mitundu iti yomwe imagwiritsidwa ntchito kwambiri ya ufa wowuma matope owonjezera?

Redispersible latex ufa

Redispersible latex ufa amatha kusintha zinthu zotsatirazi mumatope a ufa wowuma:

① Kusungidwa kwamadzi ndikugwira ntchito kwamatope osakanikirana;

② Kuchita kolumikizana kwa magawo osiyanasiyana oyambira;

③ The kusinthasintha ndi mapindikidwe ntchito matope;

④ Mphamvu yopindika ndi mgwirizano;

⑤ Kukana kuvala;

⑥ Kupirira;

⑦ Kukhazikika (kusakwanira).

Kugwiritsa ntchito kwaredispersible latex ufamumatope opaka utoto wopyapyala, zomangira matailosi a ceramic, makina otchinjiriza pakhoma lakunja, ndi zida zodzipangira okha zawonetsa zotsatira zabwino.

Madzi posungira ndi thickening wothandizira

Madzi kusunga thickeners makamaka mongama cellulose ethers, starch ethers, etc. Etha ya cellulose yomwe imagwiritsidwa ntchito mumatope a ufa wowuma ndi makamaka methyl hydroxyethyl cellulose ether (MHECndi hydroxypropyl methyl cellulose ether (Mtengo wa HPMC).

Madzi ochepetsera

Ntchito yayikulu yochepetsera madzi ndikuchepetsa kuchuluka kwamadzi mumatope, potero kumapangitsa mphamvu yake yopondereza. Zida zazikulu zochepetsera madzi zomwe zimagwiritsidwa ntchito mumatope owuma a ufa ndi monga casein, naphthalene yochepetsera madzi, melamine formaldehyde condensate, ndi polycarboxylic acid. Casein ndi superplasticizer yabwino kwambiri, makamaka yamatope osanjikiza, koma chifukwa cha chilengedwe chake, mtundu wake komanso mtengo wake umasinthasintha. Naphthalene mndandanda wochepetsera madzi omwe amagwiritsidwa ntchito kwambiri β-Naphthalenesulfonic acid formaldehyde condensate.

Coagulant

Pali mitundu iwiri ya coagulants: accelerator ndi retarder. Ma Accelerating agents amagwiritsidwa ntchito kufulumizitsa kukhazikitsa ndi kuumitsa matope, ndipo calcium formate ndi lithiamu carbonate amagwiritsidwa ntchito kwambiri. Aluminate ndi sodium silicate angagwiritsidwenso ntchito ngati mathamangitsidwe wothandizira. Retarder imagwiritsidwa ntchito kuchepetsa kuyika ndi kuuma kwa matope, ndipo tartaric acid, citric acid ndi mchere wake, komanso gluconate zakhala zikugwiritsidwa ntchito bwino.

Wothandizira madzi

Zinthu zoletsa madzi zimaphatikizirapo mankhwala a polima monga iron chloride, organic silane compounds, fatty acid salts, polypropylene fibers, ndi rabara ya styrene butadiene. Iron chloride imateteza madzi kuzinthu zabwino zoletsa madzi, koma sachedwa dzimbiri zitsulo ndi zitsulo ophatikizidwa mbali. The insoluble kashiamu mchere kwaiye ndi zimene mafuta asidi salt ndi ayoni kashiamu mu gawo simenti gawo pa makoma capillaries, amatenga mbali kutsekereza pores ndi kupanga capillary chubu makoma kukhala hydrophobic pamwamba, potero akugwira ntchito madzi. Mtengo wa zinthuzi ndi wotsika, koma zimatenga nthawi yayitali kusakaniza matope ndi madzi.

fiber

Ulusi womwe umagwiritsidwa ntchito popanga matope owuma ndi monga ulusi wagalasi wosamva alkali, ulusi wa polyethylene (ulusi wa polypropylene), ulusi wamphamvu kwambiri komanso wapamwamba kwambiri wa polyvinyl alcohol fiber (polyvinyl alcohol).matabwa ulusi, etc. Zomwe zimagwiritsidwa ntchito nthawi zambiri zimakhala zolimba kwambiri komanso zapamwamba za modulus polyvinyl alcohol fibers ndi polypropylene fibers. Mphamvu zapamwamba komanso ulusi wambiri wa modulus wa polyvinyl mowa umagwira ntchito bwino komanso mtengo wotsika kuposa ulusi wa polypropylene wochokera kunja. Ulusi amagawidwa mosagwirizana komanso mofanana mu matrix a simenti, ndipo amalumikizana kwambiri ndi simenti kuti ateteze mapangidwe ndi kukula kwa ma microcracks, kupangitsa kuti matrix amatope akhale ochuluka, motero amakhala ndi ntchito yosalowa madzi komanso mphamvu yabwino komanso kukana kusweka. Kutalika ndi 3-19 mm.

Defoamer

Pakalipano, ma defoamers a ufa omwe amagwiritsidwa ntchito mumatope owuma ndi ma polyols ndi ma polysiloxanes. Kugwiritsa ntchito ma defoamers sikungangosintha kuwira, komanso kuchepetsa kuchepa. M'malo ogwiritsira ntchito, kuti muwonjezere magwiridwe antchito, zowonjezera zambiri ziyenera kugwiritsidwa ntchito nthawi imodzi. Panthawiyi, m'pofunika kumvetsera kukhudzidwa kwapakati pakati pa zowonjezera zosiyanasiyana. Kuonjezera apo, m'pofunikanso kumvetsera kuchuluka kwa zowonjezera zowonjezera. Ochepa kwambiri kuti awonetse zotsatira za zowonjezera; Mochulukira, pangakhale zotsatira zoyipa.