Dry powder mortar yakashandiswa zvakanyanya pari zvino. Pane bond simba indekisi mune yakaoma upfu dhaka. Kubva pakuona kwezviitiko zvemuviri, kana chinhu chichida kunamatira kune chimwe chinhu, chinoda viscosity yacho. Zvimwe chetezvo kune dhaka, simende + Jecha rakasanganiswa nemvura kuti riwane simba rekutanga rechisungo, wobva waporeswa nezvinowedzerwa uye simende kuti pakupedzisira uwane simba rechisungo rinodiwa nedhaka. Saka ndezvipi zvinhu zvinokanganisa kusimba kwechisungo?
Mhedzisiro yezvinowedzera
Cellulose ether nehupfu yerabha zvinhu zvinowedzerwa mudhaka yakaoma yehupfu. Iyo rabha poda mudhaka inowanzonyungudika mumvura-inonyungudika inodzokororwa latex poda, inogona kupatsanurwa kuita yakaoma uye inochinjika. Shandisa inoenderana nerabha poda zvinoenderana nezvinodiwa zvechigadzirwa; mabasa makuru Inopa kunamatira kwakanakisa uye inobatsira kuvandudza kudzivirira kwemvura, kupisa kupisa, plastiki uye kuchinjika kwedhaka.
Basa re cellulose ether rinonyanya kushandiswa kuchengetedza mvura mudhaka kuvandudza kuvakwa kwechigadzirwa; semuenzaniso, pakuvaka imba kare, nyanzvi dzakawanda dzemhizha dzakasanganisa simende nejecha pasi. Mushure mekuwedzera mvura uye kubvongodza, vanowanzoona mvura ichiyerera. Pakupura madziro nemhando iyi yedhaka, kwete chete kuti ive gobvu, asiwo shoma shoma inofanira kuiswa zvishoma nezvishoma. Imwe mamiriro ndeyekupukuta paunenge uchikwesha. Kuvandudza mumamiriro ezvinhu aya kwakakurumidza. Mvura yakavharirwa mudhaka uye inoramba kubuda. Paunenge uchipura madziro, unogona kugadzirwa nyore nyore se putty, uye ukobvu hunogonawo kudzorwa nekuderedzwa; iyo inobatsira zvikuru ndeyokuti kukurumidza kuoma kwedhaka kunogona kudzorwa zvakanaka, uye simenti inogona kunge yakazara hydrated, iyo inobatsira pakuvandudzika kwese kwesimba revhu.
kupera
Iyo shrinkage yedhaka inogona kunzi inopindirana kune simba rekubatanidza, iyo inogona kukanganisa chaiyo yekubatanidza nzvimbo, zvichiita kuti iite kuputika kwegomba uye kurasikirwa zvakananga kwesimba rekubatanidza; saka, tinofanira kuva nezvinodiwa zvakasimba pakugadzika kwe simenti uye jecha mumatope , iyo isingadzoreri chete shrinkage, asiwo inobatsira pakusimba kwechisungo chedhaka. Mukuwedzera, kuderedza shrinkage kunogonawo kusanganiswa nezvinhu zvinoshanda. Zvishandiso zvekushandisa zvinowanzo reva huwandu hukuru hweyakagadziriswa silica uye yakagadziriswa alumina. Haisi kuoma kana kuomesa zvishoma nezvishoma kana mvura yawedzerwa. Hukuru hwayo hudiki hwakatsetseka, hunogona kutsiva chikamu chesimende inozadza dhaka, nekudaro ichidzikisa kuderera kwedhaka.
Mhedzisiro yekudzivirira mvura uye hydrophobic
Mune imwe pfungwa, kudzivirira mvura uye hydrophobicity zvinopesana nesimba rechisungo. Semuenzaniso, munguva yakapfuura, vanhu vakawanda vaitarisira kuva nehupfumi hwemvura mumatairi ekunamatira, izvo zvinogona kuderedza nzira yekuvaka yekicheni uye masvingo ekugezera, asi kukwanisa hakusi kukwirira; chekutanga, kana dhaka redu richida kuwana kusapinda kwemvura kana hydrophobic mhedzisiro, tinofanira kuwedzera hydrophobic mumiririri. Mushure mekunge iyo hydrophobic agent yakasanganiswa nedhaka, firimu risingapindiki richaita zvishoma nezvishoma pamusoro. Nenzira iyi, kana matiles akaiswa, mvura haigone kupinda mukati mematairi, kugona kunyorova kunoderedzwa, uye simba rekubatanidza rechisikigo harigone kuvandudzwa panguva inotevera yekuchengeta dhaka.
Kusimba kwechisungo kunoreva simba guru rekubatanidza redhaka rinoshanda pachikamu chepasi;
Kusimba (tensile strength) zvinoreva kugona kwepasi pevhu kupikisa simba rekusimba rinotenderera pamusoro;
Kuveura simba zvinoreva simba rinotsanangurwa nekushandisa simba rinoenderana;
Simba rekumanikidzira rinoreva kukosha kwepamusoro apo iyo dhaka inokundikana, inopimwa nekuisa simba.
Nguva yekutumira: Mar-06-2023