Kuti uvandudze brittleness uye yakakwira elastic modulus yechinyakare simende dhaka mudhaka, zvinowanzodikanwa kuwedzera redispersible latex poda sekuwedzera, iyo inogona kupa simende dhaka kushanduka kwakanaka uye kusimba simba.Kuramba uye kunonoka chizvarwa chesimende dhaka rakatsemuka, nekuti iyo polymer uye dhaka zvinoumba interpenetrating network chimiro, inoenderera polymer firimu inoumbwa mumapores, iyo inosimbisa chisungo pakati peaggregates uye inovhara zvikamu mumatope Pores, saka iyo yakagadziridzwa. dhaka mushure mekuomeswa kwakagadzirisa zvakanyanya kuita kupfuura simende dhaka.
Iyo latex poda inoumbwa nekupisa kwakanyanya, kudzvanywa, kupfapfaidza kuomesa uye homopolymerization neakasiyana anoshanda anosimbisa micropowder, ayo anogona zvakanyanya kuvandudza kugona kwekubatanidza uye kusimba kwesimba redhaka, uye ine yakanaka kuvaka kwekuita kweanti-kudonha, kuchengetedza mvura uye kukora. , kupikisa kwemvura uye kutonhora-kunyunguduka kusagadzikana , Yakanakisa kupisa kuchembera kuramba, zvigadzirwa zviri nyore, zviri nyore kushandisa.Xindadi latex poda ine yakanakisa kuenderana nesimende, inogona kunyungudika zvachose mu simende-yakavakirwa yakaoma-yakasanganiswa dhaka paste, haideredze simba resimende mushure mekurapa, kwete chete inochengetedza yakanakisa adhesion, firimu-inogadzira zvinhu uye kuchinjika, asiwo ine yakanaka. Kuramba kwemamiriro ekunze, kugadzikana, kushanda kwekubatana uye kuramba kwekuputika.Mushure mekuomeswa, inogona kudzivirira kunyura kwemhepo ine acidic pamadziro, uye hazvisi nyore kupuruzira uye deliquesce mushure mekunyorova.Inogona kuwedzera kusimba kwechigadzirwa.Kuwedzera redispersible latex poda kune putty poda uye dhaka inogona kuwedzera simba rayo, uye inobatsira zvikuru kuvandudza kuoma.Iine basa rakatanhamara rekusapinda kwemvura, simba rekubatanidza rakanaka, rinogonawo kuwedzera kunyungudika kwedhaka uye kuva nenguva yakavhurika yakareba, uye rinopa dhaka neakanakisa alkali kuramba, uye rinogona kuvandudza kunamatira / kunamatira uye kuchinjika kuramba kwedhaka.Pamusoro pesimba, kupfeka kuramba uye kugadzirwa, ine simba rinochinjika mune inochinjika anti-kuparuka dhaka.
Tichitaura, latex poda ine tembiricha yegirazi iri pasi pe5 ° C inonyanya kuchinjika uye inonyanya kushandiswa mumadziro ekunze ekudzivirira dhaka, uye latex poda ine tembiricha yegirazi inodarika 10 ° C inonyanya kushandiswa mukunamira uye kuzvimisa. matope .
Zvichienderana nekuumbwa kwedhaka, kushandiswa kwechigadzirwa chedhaka kuchakanganiswawo nekushandurwa kwehuwandu hwakawedzerwa hwe latex powder inodzokororwa: iyo yakawedzerwa yakawanda ye redispersible latex powder iri pasi pe1%, iyo ine imwe simba. pakuvaka nekunamatira kwedhaka;Kuwedzerwa kwe redispersible latex powder ndeye 1, 2.0%, iyo inovandudza simba, kudzivirira mvura uye kushanduka kwevhu;iyo yekuwedzera redispersible latex poda ndeye 2.0, 5%, ichigadzira network polymer firimu mudhaka.Pasi pemamiriro ekunze akasiyana-siyana uye kupindirana, kusimba uye kuchinjika kwedhaka zviri pachena kunovandudzwa.
Kana iri yakakwira latex poda yemukati, chikamu chepolymer mudhaka yakarapwa zvishoma nezvishoma chinodarika chikamu cheiyo inorganic hydration chigadzirwa, uye dhaka rinoita shanduko yemhando uye rinoita muviri wakanyungudika, ukuwo hydration chigadzirwa chesimende ichiva ” filler. ”.Iyo firimu yakaumbwa neiyo redispersible latex poda yakagoverwa pachiratidziro inoita rimwe basa rakakosha, ndiko kuti, kusimudzira kunamatira kune zvakabatika zvinhu, izvo zvakakodzera kune dzimwe nzvimbo dzakaoma-kunamira, dzakadai seyakanyanya kuderera kunyura kwemvura kana Kusiri- zvinonwisa mvura (zvakadai sekongiri yakatsetseka uye simende zvinhu, mahwendefa esimbi, zvidhinha zvine homogeneous, vitrified brick surfaces, nezvimwewo) uye organic material surfaces (zvakadai seEPS boards, plastiki, nezvimwewo) zvinonyanya kukosha.Nekuti kusungirirwa kwezvinhu nemeta-mechanical adhesive kunowanikwa kuburikidza nemusimboti wekumisikidza kwemuchina, kureva kuti, iyo hydraulic slurry inopinda mumakapu ezvimwe zvinhu, inoomesa zvishoma nezvishoma, uye pakupedzisira inobata dhaka sekiyi yakaiswa mukiyi. .Pamusoro pechinhu, chepamusoro-soro-ku-chisungo chepamusoro, nekuda kwekusakwanisa kunyatsopinda mukati mezvinyorwa kuti zvigadzire zvakanaka mechanical embedding, dhaka rine chete inorganic adhesives haina kunyatsobatanidzwa kwairi, uye erekitironi. microscope kuona zvakare yakanaka kwazvo.Zvinozvisimbisa.Iyo yekubatanidza nzira yemapolymers akasiyana.Mapolymers anobatana nepamusoro pezvimwe zvinhu ne intermolecular forces, akasununguka kubva kune porosity yepasi (zvechokwadi, nzvimbo yakaoma uye yakawedzera yekubatana kwepamusoro ichavandudza simba rekubatanidza) , iyo inonyanya kujeka munyaya ye organic substrates, uye kucherechedzwa kwemaikorosikopu erekitironi kunoratidzawo hukuru hwesimba rayo rokunamira.
Iyo latex poda inoshandura kuenderana uye kutsvedza kweiyo sisitimu mukunyorova kusanganisa mamiriro, uye kubatana kunovandudzwa nekuwedzera latex poda.Mushure mekuomeswa, inopa yakatsetseka uye yakaomeswa pamusoro pedhiri nechisimba chakabatana, uye inovandudza iyo interface maitiro ejecha, matombo uye pores., yakagadziridzwa mufirimu pane interface, iyo inoita kuti tile inonamira iwedzere kushanduka, inoderedza elastic modulus, inotora iyo thermal deformation stress kusvika pamwero mukuru, uye ine kudzivirira kwemvura munguva inotevera, uye tembiricha yebuffer uye deformation yezvinhu hazvienderane. .Iko kuchinjika uye kusimba kwelatex poda inogona kutongwa zvinoenderana negirazi tembiricha yekuchinja.Kana tembiricha yegirazi yekuchinja iri pazasi 0 madhigirii, inonyanya kuchinjika.Ndeupi rudzi rwelatex poda inodiwa mudhaka inowanzogadziriswa maererano nekuita maitiro echigadzirwa.Tile inonamira inoda kushandisa latex poda nekunamira kuri nani.
Nguva yekutumira: Mar-14-2023