Zuva Rokutumira:11, Sep,2023

Kubva kuma1980s, mamixtures, kunyanya-akanyanya-kuita basa rekudzikisa mvura, akasimudzirwa zvishoma nezvishoma uye akaiswa mumusika wekongiri wepamba, kunyanya mune yakakwirira-simba kongiri uye pombi kongiri, uye zvave zvinhu zvakakosha. Sezvakataurwa naMalhotra pamusangano wekutanga weInternational Conference on Concrete Admixtures: "Kuvandudzwa uye kushandiswa kwevamiririri vanoderedza mvura vanonyanya kukosha chiitiko chakakosha mukufambira mberi kwekongiri tekinoroji muzana ramakore rechi20." Pakanga pane zvishoma zvishoma zvakakosha kubudirira mune teknolojia yekongiri mumakore, chimwe chazvo chaiva kuvandudzwa kwemhepo yakadzika muma1940, iyo yakashandura chiso chekongiri teknolojia muNorth America;Superplasticizerndiyo imwe budiriro huru ichave nemhedzisiro yakakura pakugadzirwa uye kushandiswa kwekongiri kwemakore mazhinji ari kuuya.

Superplasticizermune dzimwe nyika mamwe anonzisuperplasticizer, sezita rinoratidza, yakanyatsokodzera kugadzirira superplasticized kongiri musanganiswa. Ehe, inonyanya kukodzera kusanganisa misanganiswa nekuyerera kukuru, yakakura slurry vhoriyamu uye yakaderera mvura-binder ratio, ndiko kuti, kupomba yakakwirira-yakasimba kongiri.

Nekudaro, kune imwe kongiri, senge kongiri yakadirwa mukuvaka hydraulic dhamu, iyo yakakura particle size yeaggregate yakakura (kusvika 150mm), iyo slurry volume idiki uye kuyerera hakuna kukura, uye kongiri inoda kuumbwa. nekushandisa vibration yakasimba kana vibration rolling action, iyo yakanyanya kunaka yekudzikisa mvura inogona kunge isina kukodzera. Kuti uchengetedze chiyero chemvura-binder chisina kuchinjika, kuitira kuti isangane nemichina yezvivakwa paramita inodiwa nedhizaini yedhizaini, kuderedza kushandiswa kwemvura, uye kuderedza simende zvinhu sepfungwa, kuvakwa kwakawanda kwemadhamu emvura emumba kunosanganiswa nekugona kukuru. mvura reducer. Muchokwadi, kushandisa kwakadai kune dambudziko, nekuti yekutanga hydraulic kongiri inosanganiswa nemhepo inopinza ajenti kana lignin mhando yeyakajairwa mvura inoderedza, mwero wavo wekudzikisa mvura idiki, uye nekuda kwekuita kwemhepo intraining, wedzera huwandu hwe slurry, saka apo kushandiswa kwemvura uye kuwanda kwezvinhu zvesimende zvakaderedzwa panguva imwe chete, ndiko kuti, kana uwandu hwe slurry huchideredzwa, hunogona kuchengetedza hutsinye. Kuve nechokwadi chekuti pane nzvimbo yakakwana yekuzadza aggregate, kupeta iyo aggregate uye kupa inoshanda slurry inodiwa kuti musanganiswa ugadzikane mushure mekudira.

Uye zvakare, iyo yekumanikidza simba yemusanganiswa ine yakanyanya kunaka yekudzikisa mvura yekudzikisa muyero wemvura inosungirirwa inogona kuvandudzwa zvakanyanya mushure mekuomeswa, asi kukotama kwesimba rekukura kunowanzo kudiki, uye kutsemuka kwekunzwa kuchawedzera, saka kazhinji, kuvakwa kwekongiri pavement kana bhiriji panhizha kunofanirwa kuve nekuchenjerera nehupamhi hwekudzikisa mvura mumiririri. Kutaura zvazviri, mukugadzirira kwehuwandu hukuru hweC30 mukuvaka kwehurumende uye engineering yehurumende (inofanirwa kuverengera kupfuura 1/2 yehuwandu) kana mamwe magiredhi emasimba epasi ekongiri yakapombwa, kukwirira kwemvura kunoderedza hakuna kukodzera, kana hachisi chinhu chakakosha.