Iko kusanganiswa kwehuwandu hwemvura inoderedza mumiririri inodarika iyo yakajairwa kusanganiswa kuwanda kakati wandei, uye simba rayo pakuita kwekongiri rinofanira kutariswa zvinoenderana nemamiriro chaiwo.
Muchiitiko chekutanga, mu-ultra-high-simba rekrete, nokuti mvura-binder ratio ndeye ≤0.3 kana kunyange yakaderera se 0.2, inowanzoratidza kuti mamiriro ekrete haanzwisisi kuwanda kwemvura inoderedza mumiririri. Kuti uwane hutano hwakanaka hwemvura, mvura inoderedzwa. Chiyero chemumiririri chinowanzo 5-8 nguva yakajairika dosage, kureva, dosi ye.polycarboxylic acidinoda kusvika 5% -8%. Kune kongiri pazasi C50, yakakwira yemukati inoshamisa. Zvisinei, mhinduro dzebvunzo dzinoratidza kuti simba rekongiri pazera rega rega rinokura zvakanaka pasi pehuwandu uhu, uye simba re28d rekongiri rinogadzirirwa nesimba iri rakakura kupfuura 100MPa.
Chikonzero ndechekuti: kupararira kwemvura inoderedza mumiririripasimende inongova yemuviri adsorption.Mvura inoderedza mumiriririmamorekuru adsorbed pamusoro pezvimedu zvesimende. Kuburikidza ne steric chipingamupinyi uye electrostatic repulsion, iyo flocculation chimiro chemasimende masimende inoparara uye yemahara mvura inoburitswa. , Nekudaro kuwedzera kuyerera kwekongiri, uye nekuda kwechimiro chayo chakakosha muzinga, iyopolycarboxylic acidbasedmvura inoderedza mumiriririinogona kudzivirira masimende kuti asaunganidzwe zvakare mukati meimwe nguva yenguva, saka ine yakanaka slump retention performance. Kamwe imwe nguva yenguva yapfuura, simende hydration chigadzirwa chinoputira zvachosemvura inoderedza mumiriririmamorekuru adsorbed pamusoro pezvimedu zvesimende. Mushure memvura inoderedza mumiriririmamorekuru anodzivirirwa, kupararira kunonyangarika zvachose, uyezve hakusisina kana mhedzisiro kana pesvedzero pane kongiri. Iyo simende inowanzova mvura Simba rekongiri rinokura zvakanaka.
Zvechokwadi, nekuda kwehuwandu hwehuwandu hwemvura inoderedza mumiririri, kuwanda kwemvura inoderedza mumiriririmamorekuru mukongiri yakakura. Mushure mekunge mamwe mamorekuru akafukidzwa nesement hydration zvigadzirwa, mamorekuru matsva anoshambadzirwa pamusoro pesimende hydration zvigadzirwa, kudzivirira masimende kuti asakurumidza kuwanda. Network inoumbwa, iyo inowedzera nguva yekuisa kune imwe nhanho, asi iyo general simende yekumisikidza haipfuure 24h.
Muchiitiko chechipiri, themvura inoderedza mumiririripachayo ine mamwe mhepo-inopinza uye inodzoreredza zvivakwa, uye nguva dzinoverengeka dzepamusoro-admixture inogona kuve nemhedzisiro yakaipa pakuita kwekongiri. Kazhinji kutaura, huwandu hwechikamu chekudzoreredza hunotarwa zvichienderana nenzvimbo yekushisa, zvinodiwa zveinjiniya uye yakajairika dosage ye.mvura inoderedza mumiririri. Adsorption inokanganisa yakajairika hydration ye simentitious zvinhu. Muchiitiko chakareruka, nguva yekugadzika yakawedzera zvakanyanya, uye mune yakaipisisa, kongiri haizogadzike kwemazuva akati wandei kana zvachose. Kazhinji, kune kongiri yakagadzika kwemazuva maviri kana kupfuura, nekuda kwekunyanya kunonoka kweiyo hydration process, mhando uye huwandu hwezvigadzirwa zve hydration zvichachinja, zvichikonzera kuderera kwekusingaperi kwesimba rekongiri. Ehe, kune subway inovharira mirwi (kazhinji 72-90h yekutanga kugadzika) uye misa kongiri kuvaka senge nheyo dzemirwi, zvivharo, madhamu, nezvimwewo, nguva yakareba yekuisa inodiwa. Kazhinji, chiyero chesimba chinofanira kukwidziridzwa zvakakodzera panguva yekugadzirwa kweiyo musanganiswa ratio. Ita shuwa kuti iyo 28d simba inosangana nezvinodiwa zvekugadzira.
The air-entrainingmvura inoderedza mumiriririyakanyanya kusanganiswa kakawanda. Kana iyo mhepo yekongiri yakakodzera pane yakajairwa kusanganisa mwero, iyo mhepo yemukati inozowedzerwa zvakanyanya mushure mekunyanya kusanganiswa kakawanda. Iko slurry yekrete yakapfuma zvisina kujairika, uye kongiri yakareruka uye inoyangarara kana yakafoshorwa, iyo yakakomba Kana kongiri yakasununguka uye ine porous sechingwa, kusimba kwekongiri kunoderedzwa zvakanyanya.
Muchiitiko chechitatu, kunyange kanamvura inoderedza mumiririripachayo haina air-entraining uye retading type, mushure mekunge yakapetwa kaviri, kana kushandiswa kwemvura kusina kugadziriswa munguva, kushanda kwekongiri itsva kunogona kunge kwakanyanyisa kuderera, zvichiita kuti kuve nekuvhara kwakakomba. Mvura, kupatsanurwa, kubata pasi, kuomesa, nezvimwewo, uye kusafanana kwakashata uye kugadzikana mushure mekudururwa, uye delamination yemukati, iyo inotungamirira kuwedzera kwehuwandu hwemvura-ku-binder yekongiri yakakomberedza simbi yesimbi, uye kuderera kwesimba. , izvo zvinoita kuti kusimba kwesimbi yesimbi kudonha zvakanyanya. Huwandu hwekubuda ropa hunokonzerwa neyakakomba-kusanganiswa-kusanganiswa kuchaonekwawo pamusoro pekongiri uye zvikamu zvinosangana neformwork, zvichikonzera kuderera kwesimba rezvikamu izvi, uye huwandu hukuru hwekuremara senge makatsemuka, huchi, uye pockmarked surfaces dzinowanzoonekwa kana mold yabviswa, izvo zvinoita kuti kongiri ikwanise kuramba kukukurwa kwekunze Kuderedza zvakanyanya, kunokanganisa zvakanyanya kusimba kwekongiri.
Nguva yekutumira: Zvita-02-2021
