Yuav Ua Li Cas Txhim Kho Kev Ua Haujlwm ntawm Pob Zeb?

Los ntawm kev sim sib piv, qhov sib ntxiv ntawm cellulose ether tuaj yeem txhim kho kev ua haujlwm ntawm cov pob zeb zoo tib yam thiab txhim kho lub twj tso kua mis ntawm cov twj tso kua mis. Kev koom ua ke ntawm cellulose ether yuav txo lub zog ntawm pob zeb.

Cov lus tseem ceeb: cellulose ether; pob zeb ua haujlwm; Pumpability

1.Taw qhia

Nrog rau kev txhim kho txuas ntxiv ntawm zej zog, qhov kev thov rau kev lag luam pob zeb yog nce. Tom qab ntau tshaj kaum xyoo ntawm txoj kev loj hlob sai, kev lag luam pob zeb tau nkag mus rau theem pib paub tab. Ntau yam kev lag luam pob zeb ua tau raws li qhov yuav tsum tau ua ntawm ntau yam haujlwm. Txawm li cas los xij, hauv kev ua haujlwm tiag tiag, peb pom tias thaum siv cov twj tso kua mis, feem ntau yog vim li cas xws li kev ua haujlwm tsis zoo ntawm cov pob zeb thiab cov xuab zeb tsis ruaj khov, lub twj tso kua mis yuav raug thaiv, thiab ntau lub sijhawm thiab cov neeg ua haujlwm yuav raug nkim ntawm qhov chaw tsim kho. thiab chaw nres tsheb sib tov, uas yuav txawm cuam tshuam rau qhov project. qhov zoo ntawm. Tshwj xeeb tshaj yog rau cov pob zeb qis, nws qhov kev ua haujlwm tau zoo thiab cov twj tso kua mis tsis zoo, nws tsis ruaj khov dua, thiab qhov tshwm sim ntawm cov yeeb nkab ntsaws thiab tawg yog ntau dua. Feem ntau, nce cov xuab zeb thiab nce cov khoom siv cementitious tuaj yeem txhim kho cov xwm txheej saum toj no, tab sis nws kuj txhim kho cov pob zeb zoo. khoom siv. Nyob rau hauv cov kev tshawb fawb yav dhau los, nws tau pom tias qhov sib ntxiv ntawm cellulose ether rau cov pob zeb ua npuas yuav tsim ntau qhov kaw me me npuas hauv qhov sib tov, uas ua rau kom cov dej ntws ntawm cov pob zeb, txhim kho lub cev qhuav dej, thiab tib lub sijhawm ua si. lub luag haujlwm hauv kev khaws dej thiab kev tiv thaiv hauv cov cement mortar. Yog li ntawd, ntxiv cellulose ether rau cov pob zeb zoo tib yam yuav tsum muaj cov txiaj ntsig zoo sib xws. Tom ntej no, los ntawm cov kev sim, nyob rau hauv lub premise ntawm qhov sib tov sib piv, ib tug me me ntawm cellulose ether yog ntxiv los soj ntsuam cov kev ua tau zoo ntawm cov sib tov, ntsuas qhov ntub bulk ntom, thiab sim lub compressive zog ntawm pob zeb 28d. Cov hauv qab no yog cov txheej txheem thiab cov txiaj ntsig ntawm kev sim.

2. Kev sim

2.1 Test raw khoom

(1) Cov cement yog Yufeng hom Po42.5 ua.

(2) Cov khoom siv ntxhia ntxhia siv tau yog Laibin Power Plant Class II ya tshauv thiab Yufeng S75 chav kawm ntxhia hmoov.

(3) Cov nplua aggregate yog limestone tshuab ua xuab zeb ua los ntawm Guangxi Yufeng Qhob Co., Ltd., nrog ib tug fineness modulus ntawm 2.9.

(4) Coarse aggregate yog 5-25 mm nruam graded limestone tsim los ntawm Yufeng Blasting Company.

(5) Cov dej reducer yog polycarboxylate high-efficiency dej reducer AF-CB tsim los ntawm Nanning Nengbo Company.

(6) Lub cellulose ether yog HPMC tsim los ntawm Kima Chemical Co., Ltd, nrog viscosity ntawm 200,000.

2.2 Test method thiab test process

(1) Raws li lub hauv paus ntsiab lus tias qhov sib piv ntawm cov dej-binder thiab cov xuab zeb sib npaug, ua cov kev ntsuam xyuas nrog cov sib xyaw sib txawv, ntsuas qhov poob qis, lub sij hawm-lapse, thiab nthuav dav ntawm cov sib tov tshiab, ntsuas qhov ntom ntom ntawm txhua tus qauv, thiab saib qhov sib tov sib xyaw. Kev ua haujlwm ntawm cov khoom siv thiab ua cov ntaub ntawv.

(2) Tom qab qhov kev ntsuas poob qis rau 1 teev, qhov sib xyaw ntawm txhua tus qauv tau rov sib xyaw ua ke thiab thauj mus rau hauv 2 pawg raws li, thiab kho rau 7 hnub thiab 28 hnub raws li cov qauv txheej txheem.

(3) Thaum pab pawg 7d mus txog lub hnub nyoog, ua qhov kev sim tawg kom tau txais kev sib raug zoo ntawm qhov ntau npaum li cas thiab 7d lub zog, thiab nrhiav kom paub qhov nqi npaum li cas x nrog kev ua haujlwm zoo thiab lub zog siab.

(4) Siv qhov ntau npaum li cas x los ua cov kev sim ua vaj tse nrog cov ntawv sib txawv, thiab sib piv lub zog ntawm cov qauv khoob khoob. Tshawb xyuas seb lub zog ntawm cov qib sib txawv cuam tshuam los ntawm cellulose ether ntau npaum li cas.

2.3 Cov qhabnias thiab kev soj ntsuam

(1) Thaum lub sij hawm sim, soj ntsuam lub xeev thiab kev ua tau zoo ntawm kev sib xyaw tshiab ntawm cov qauv nrog ntau npaum li cas, thiab thaij duab rau cov ntaub ntawv. Tsis tas li ntawd, lub xeev thiab kev ua haujlwm kev ua haujlwm piav qhia ntawm txhua tus qauv ntawm qhov sib tov tshiab kuj tau sau tseg.

Kev sib xyaw ua ke ntawm lub xeev thiab kev ua haujlwm ntawm kev sib xyaw tshiab ntawm cov qauv nrog ntau npaum li cas thiab cov lus piav qhia ntawm lub xeev thiab cov khoom ntawm cov khoom sib xyaw tshiab, nws tuaj yeem pom tias cov pab pawg tsis muaj cellulose ether muaj kev ua haujlwm dav dav, los ntshav thiab tsis zoo encapsulation. Thaum ntxiv cellulose ether, tag nrho cov qauv tsis muaj qhov tshwm sim los ntshav, thiab kev ua haujlwm tau zoo dua qub. Tsuas yog rau cov qauv E, lwm pab pawg muaj cov dej ntws zoo, nthuav dav loj, thiab yooj yim rau twj thiab tsim. Thaum cov koob tshuaj nce mus txog 1‰, qhov sib tov ua viscous, degree ntawm expansion txo, thiab fluidity yog nruab nrab. Yog li, qhov ntau npaum li cas yog 0.2‰～0.6‰, uas tuaj yeem txhim kho kev ua haujlwm thiab kev ua haujlwm zoo.

(2) Thaum lub sij hawm kev sim, qhov ntau ntom ntawm qhov sib tov tau ntsuas, thiab nws tawg tom qab 28 hnub, thiab qee qhov kev cai tau txais.

Nws tuaj yeem pom los ntawm kev sib raug zoo ntawm ntau qhov ntom ntom / lub zog thiab qhov ntom ntom / lub zog ntawm qhov sib xyaw tshiab thiab qhov ntau npaum li cas uas qhov ntom ntom ntawm cov khoom sib xyaw tshiab txo qis raws li qhov ntau npaum ntawm cellulose ether nce. Lub zog compressive kuj txo nrog qhov nce ntawm cellulose ether cov ntsiab lus. Nws zoo ib yam nrog cov pob zeb ua npuas ncauj kawm los ntawm Yuan Wei.

(3) Los ntawm kev sim, nws pom tias qhov ntau npaum li cas tuaj yeem raug xaiv raws li 0.2‰, uas tuaj yeem tsis tsuas yog tau txais kev ua haujlwm zoo, tab sis kuj tseem muaj zog me me poob. Tom qab ntawd, tsim kev sim C15, C25, C30, C35 4 pawg ntawm cov dawb paug thiab 4 pawg sib xyaw nrog 0.2‰cellulose ether.

Saib xyuas kev ua haujlwm ntawm kev sib xyaw tshiab thiab sib piv nrog cov qauv dawb. Tom qab ntawd nruab cov pwm rau cov txheej txheem kho, thiab tawg cov pwm rau 28 hnub kom tau txais lub zog.

Thaum lub sijhawm sim, nws tau pom tias kev ua haujlwm ntawm cov qauv sib xyaw tshiab sib xyaw nrog cellulose ether tau txhim kho zoo heev, thiab yuav tsis muaj kev sib cais lossis los ntshav txhua. Txawm li cas los xij, qhov sib xyaw qis qis ntawm C15, C20, thiab C25 hauv cov qauv dawb paug yog yooj yim cais thiab los ntshav vim yog cov hmoov tshauv me me. C30 thiab qib siab dua kuj tau txhim kho. Nws tuaj yeem pom los ntawm cov ntaub ntawv hauv kev sib piv ntawm lub zog ntawm cov ntawv sib txawv sib xyaw nrog 2‰cellulose ether thiab cov qauv dawb paug uas lub zog ntawm cov pob zeb yog txo mus rau ib qho twg thaum cov cellulose ether ntxiv, thiab qhov loj ntawm lub zog poob nce nrog qhov nce ntawm daim ntawv lo.

3. Kev sim xaus

(1) Ntxiv cellulose ether tuaj yeem txhim kho kev ua haujlwm ntawm cov pob zeb qis thiab txhim kho cov twj tso kua mis.

(2) Nrog rau qhov sib ntxiv ntawm cellulose ether, qhov ntom ntom ntawm pob zeb txo qis, thiab qhov loj dua, qhov me me ntawm qhov ntom ntom.

(3) Kev sib xyaw ua ke ntawm cellulose ether yuav txo lub zog ntawm cov pob zeb, thiab nrog rau cov ntsiab lus nce, qhov kev txo qis yuav nce ntxiv.

(4) Ntxiv cellulose ether yuav txo tau lub zog ntawm cov pob zeb, thiab nrog rau kev nce qib, qhov loj ntawm qhov txo qis yuav nce, yog li nws tsis haum rau kev siv hauv cov pob zeb qib siab dua.

(5) Ntxiv cellulose ether tuaj yeem siv los txhim kho kev ua haujlwm ntawm C15, C20, thiab C25, thiab cov nyhuv zoo tagnrho, thaum lub zog poob tsis loj. Cov txheej txheem twj tso kua mis tuaj yeem txo qhov kev pheej hmoo ntawm cov yeeb nkab thaiv thiab txhim kho kev ua haujlwm zoo.