Hnub Kawg: 26 Lub Yim Hli, 2024
1. Mineral muaj pes tsawg leeg
Cov ntsiab lus tseem ceeb yog cov ntsiab lus ntawm C3A thiab C4AF. Yog tias cov ntsiab lus ntawm cov khoom no tsis tshua muaj, qhov sib xyaw ntawm cov cement thiab dej reducer yuav zoo, cov C3A muaj qhov cuam tshuam zoo rau kev hloov pauv. Qhov no feem ntau yog vim cov dej reducer thawj adsorbs C3A thiab C4AF. Tsis tas li ntawd, tus nqi dej ntawm C3A muaj zog dua li ntawm C4AF, thiab nws nce ntxiv nrog kev nce ntawm cov cement fineness. Yog tias ntau C3A cov khoom muaj nyob rau hauv cov cement, nws yuav ncaj qha ua rau cov dej me me hauv sulfate, uas ua rau txo qis ntawm sulfate ions tsim.
2. Kev zoo
Yog tias cov cement zoo dua, nws qhov chaw tshwj xeeb yuav loj dua, thiab cov nyhuv flocculation yuav pom tseeb dua. Txhawm rau kom tsis txhob muaj cov qauv flocculation no, yuav tsum tau ntxiv qee cov dej reducer rau nws. Txhawm rau kom tau txais cov txiaj ntsig txaus txaus, nws yog ib qho tsim nyog yuav tsum tau nce kev siv cov dej reducer rau qee yam. Nyob rau hauv ib txwm muaj xwm txheej, yog tias cov cement zoo dua, qhov tshwj xeeb ntawm qhov chaw ntawm cov cement yog qhov siab, thiab qhov cuam tshuam ntawm cov dej reducer ntawm cov cement saturated yuav nce, ua rau nws nyuaj los xyuas kom meej qhov fluidity ntawm cement paste. Yog li ntawd, nyob rau hauv cov txheej txheem tiag tiag ntawm configuration pob zeb nrog ib tug high water-cement ratio, cov dej-rau-thaj tsam ratio yuav tsum tau ua tib zoo tswj xyuas kom meej tias cov cement thiab dej reducers muaj zog adaptability.
3. Kev muab qhab nia ntawm cov cement
Kev cuam tshuam ntawm cov cement particle grading ntawm cov cement adaptability yog feem ntau pom nyob rau hauv qhov sib txawv ntawm cov ntsiab lus ntawm cov hmoov zoo hauv cov cement hais, tshwj xeeb tshaj yog cov ntsiab lus ntawm cov khoom tsawg dua 3 microns, uas muaj qhov cuam tshuam ncaj qha rau cov adsorption ntawm cov dej reducers. Cov ntsiab lus ntawm cov ntsiab lus tsawg dua 3 microns hauv cov cement sib txawv nrog cov tuam txhab cement sib txawv, thiab feem ntau yog faib nruab nrab ntawm 8-18%. Tom qab siv lub kaw lus qhib-kawg zeb, qhov tshwj xeeb ntawm qhov chaw ntawm cov cement tau zoo heev, uas muaj feem cuam tshuam ncaj qha rau kev hloov pauv ntawm cov cement thiab dej reducers.
4. Roundness ntawm cov cement hais
Muaj ntau txoj hauv kev los txhim kho qhov sib npaug ntawm cov cement. Yav dhau los, cov cement hais feem ntau yog hauv av kom tsis txhob sib tsoo cov npoo thiab cov ces kaum. Txawm li cas los xij, nyob rau hauv cov txheej txheem ua haujlwm tiag tiag, ntau cov hmoov zoo hmoov zoo tuaj yeem tshwm sim, uas muaj kev cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov cement. Yuav kom daws tau qhov teeb meem no tau zoo, round steel pob sib tsoo tshuab tuaj yeem siv ncaj qha, uas tuaj yeem txhim kho cov spheroidization ntawm cov cement hais, txo kev ua haujlwm poob, thiab txo lub sijhawm sib tsoo cov cement. Tom qab lub roundness ntawm cov cement hais tau zoo tuaj, txawm hais tias cov nyhuv ntawm cov khoom noj saturated ntawm cov dej reducer tsis loj heev, nws tuaj yeem txhim kho qhov pib fluidity ntawm cement paste mus rau qhov zoo. Qhov tshwm sim no yuav pom tseeb dua thaum tus nqi ntawm cov dej reducer siv me me. Tsis tas li ntawd, tom qab kev txhim kho lub roundness ntawm cov cement hais, fluidity ntawm cement paste kuj tuaj yeem txhim kho rau qee yam.
5. Cov khoom sib xyaw
Hauv kev siv cov cement tam sim no hauv kuv lub teb chaws, lwm cov ntaub ntawv feem ntau sib xyaw ua ke. Cov ntaub ntawv sib xyaw no feem ntau suav nrog cov tshuab hluav taws xob slag, ya tshauv, thee gangue, zeolite hmoov, limestone, thiab lwm yam. Tom qab kev xyaum ntau, nws tau raug lees paub tias yog dej reducer thiab ya tshauv yog siv los ua cov khoom sib xyaw, cov cement zoo kuj tuaj yeem hloov tau. tau txais. Yog tias volcanic tshauv thiab thee gangue siv los ua cov khoom sib xyaw, nws yog qhov nyuaj kom tau txais kev sib xyaw kom haum zoo. Txhawm rau kom tau txais cov txiaj ntsig txo cov dej zoo dua, xav tau ntau cov dej reducer. Yog tias ya tshauv lossis zeolite suav nrog hauv cov khoom sib xyaw, qhov poob ntawm qhov hluav taws xob feem ntau cuam tshuam ncaj qha rau qhov zoo ntawm volcanic tshauv. Qhov tsawg dua qhov poob ntawm qhov hluav taws kub, qhov dej ntau yuav tsum tau, thiab qhov siab dua cov volcanic tshauv. Tom qab ntau qhov kev xyaum, nws tau raug pov thawj tias kev hloov pauv ntawm cov khoom sib xyaw rau cov cement thiab dej txo tus neeg sawv cev yog qhov tseem ceeb hauv cov hauv qab no: ① Yog tias cov slag siv los hloov cov cement paste, fluidity ntawm cov tshuaj yuav muaj zog dua li cov khoom siv cement. hloov tus nqi nce. ② Yog tias cov tshauv ya ncaj qha siv los hloov cov cement paste, nws qhov dej pib tuaj yeem txo qis heev tom qab cov khoom hloov pauv ntau dua 30%. ③ Yog tias zeolite siv ncaj qha los hloov cov cement, nws yog ib qho yooj yim uas yuav ua rau cov dej tsis txaus ntawm cov tshuaj muab tshuaj. Nyob rau hauv ib txwm muaj xwm txheej, nrog rau kev nce ntawm slag hloov tus nqi, qhov ntws tuav ntawm cement paste yuav txhim kho. Thaum ya tshauv nce, qhov ntws poob tus nqi ntawm cov muab tshuaj txhuam yuav nce mus rau ib qho twg. Thaum lub zeolite hloov tus nqi siab tshaj 15%, qhov poob ntawm cov muab tshuaj txhuam yuav pom tseeb heev.
6. Cov nyhuv ntawm admixture hom ntawm fluidity ntawm cement paste
Los ntawm kev ntxiv ib qho kev faib ua feem ntawm admixtures rau pob zeb, cov pawg hydrophobic ntawm cov khoom sib xyaw yuav raug coj mus rau adsorbed ntawm cov cement hais, thiab cov pab pawg hydrophilic yuav taw tes rau kev daws teeb meem, yog li tsim cov yeeb yaj kiab adsorption zoo. Vim yog cov kev taw qhia adsorption nyhuv ntawm cov khoom sib xyaw, qhov saum npoo ntawm cov cement hais yuav raug nqi ntawm tib lub cim. Raws li cov txiaj ntsig zoo li kev tiv thaiv ib leeg, cov cement yuav tsim ib qho kev tawg ntawm cov qauv flocculent ntawm thawj theem ntawm cov dej ntxiv, kom cov qauv flocculent tuaj yeem tso tawm los ntawm cov dej, yog li txhim kho fluidity ntawm lub cev dej mus rau ib qho. qhov twg. Piv nrog rau lwm cov khoom sib xyaw, ib qho tseem ceeb ntawm polyhydroxy acid admixtures yog tias lawv tuaj yeem tsim cov pab pawg nrog cov teebmeem sib txawv ntawm cov saw tseem ceeb. Feem ntau, hydroxy acid admixtures muaj kev cuam tshuam ntau dua rau cov kua dej ntawm cov cement. Hauv cov txheej txheem kev npaj ntawm cov pob zeb muaj zog, ntxiv qee qhov kev faib ua feem ntawm polyhydroxy acid admixtures tuaj yeem ua tiav cov txiaj ntsig zoo dua. Txawm li cas los xij, nyob rau hauv tus txheej txheem ntawm kev siv polyhydroxy acid admixtures, nws muaj cov kev xav tau siab ntawm kev ua haujlwm ntawm cov khoom siv cement. Hauv kev siv tiag tiag, qhov sib tov yog nquag viscosity thiab lo rau hauv qab. Hauv kev siv lub tsev tom qab, nws kuj yog qhov ua rau dej seepage thiab stratification. Tom qab demolding, nws kuj yog roughness, xuab zeb kab, thiab cua qhov. Qhov no yog ncaj qha ntsig txog kev tsis sib haum xeeb ntawm polyhydroxy acid admixtures nrog cement thiab ntxhia admixtures. Polyhydroxy acid admixtures yog cov admixtures nrog qhov phem tshaj adaptability rau cement ntawm txhua hom admixtures.
Post lub sij hawm: Aug-26-2024
