Txhaum tsis kamntawm pob zeb ntsej muag slab yog ib qho tseem ceeb heev rau lub neej kev pab cuam ntawm pob zeb faced rockfill dam (CFRD).ya tshauv , MgO expansive agent, thiab shrinkage-txo admixture (SRA) ntawm cov khoom siv kho tshuab, kom qhuav shrinkage thiab tawg tsis kam ntawm lub ntsej muag slab pob zeb tau kawm thiab muab piv nrog cov ntaub ntawv siv pob zeb.Cov txiaj ntsig tau pom tias qhov sib ntxiv ntawm 20% ya tshauv (los ntawm qhov hnyav. ntawm binder) txhim khu lub zog ntawm pob zeb thaum lub hnub nyoog lig. Nyob rau hauv sib piv, qhov sib ntxiv ntawm 6% MgO expansive tus neeg saib xyuas los yog 1% SRA txo lub compressive zog, splitting tensile lub zog thiab qhov kawg tensile mus rau ib co degrees ntawm ntau lub hnub nyoog.The incorporation ntawm 20% ya tshauv, 6% MgO expansive agent, thiab 1 % SRA tuaj yeem txo qis qis qis ntawm ntau lub hnub nyoog thiab txhim kho qhov tawg thaum ntxov ntawm cov pob zeb, thaum kev sib koom ua ke ntawm 6% MgO expansive tus neeg sawv cev yog qhov tsim nyog rau inhibiting lub shrinkage txoj kev loj hlob thiab txhim kho qhov tawg tsis kam ntawm pob zeb ntau tshaj qhov sib ntxiv ntawm 20% ya tshauv los yog 1% SRA.
Pob zeb lub ntsej muag rockfill dam (CFRD) yog lub pob zeb pob zeb nrog pob zeb ua lub zog tseem ceeb thiab lub ntsej muag sab saud ua lub ntsej muag tiv thaiv lub cev. Vim nws cov yam ntxwv ntawm kev nyab xeeb zoo, muaj zog yoog raws, siv sijhawm luv luv thiab tus nqi qis, cov pob zeb pob zeb pob zeb ua pob zeb tau dhau los ua ib qho kev siv ntau tshaj plaws hauv kev tsim cov dams. Cov pob zeb ua pob zeb yog cov qauv sib luag thiab cov qauv zoo li cov kab nrib pleb uas ua rau tawg vim qhov kub hloov pauv, ntim deformation thiab lub hauv paus kev daws teeb meem. Rau lub pas dej da dej, yog tias muaj qhov tawg ntawm lub ntsej muag pob zeb, nws yuav rhuav tshem kev ncaj ncees thiab ua haujlwm ntawm lub pas dej ua ke, thiab qhov sib txawv uas tshwm sim los ntawm kev tawg ntawm lub ntsej muag phaj tuaj yeem ua rau cov dej sab nraud nkag mus rau hauv cov pob zeb, uas ncaj qha ua rau cov dej xau ntawm lub pas dej ua ke. Yog li ntawd, kev txhim kho qhov tawg tsis kam ntawm pob zeb ntsej muag slabs yog qhov teeb meem tseem ceeb uas cuam tshuam rau kev ua haujlwm nyab xeeb ntawm pob zeb ntawm lub ntsej muag rockfill dams. Kev xyaum ua haujlwm tam sim no thiab kev tshawb fawb qhia tau tias cov kev ntsuas tseem ceeb los txhim kho qhov tawg tsis kam ntawm lub ntsej muag pob zeb suav nrog kev tswj xyuas cov khoom ua vaj tsev zoo, kev ua kom zoo ntawm cov pob zeb sib xyaw, ntxiv cov tshauv ya thiab ntxiv cov nqi tsim nyog ntawm cov pob zeb. shrinkage reducer yog ib hom polyalcohol lossis polyether organic compounds thiab lawv cov derivatives. Cov kev tshawb fawb tau pom tias qhov sib ntxiv ntawm shrinkage txo tus neeg sawv cev tuaj yeem txo qhov nro ntawm cov pob zeb pore dej, yog li txo qhov kev ntxhov siab ntawm lub ntsws thaum lub capillary pores poob dej, thiab txhim kho qhov tawg tsis kam ntawm pob zeb rau qee yam. Qhov sib ntxiv ntawm MgO nthuav tawm tus neeg sawv cev thaum lub sijhawm npaj ua vaj tse yog ib txoj hauv kev los tswj cov kab nrib pleb. Txij li thaum MgO expansion tus neeg sawv cev yuav tsim ib qho kev nthuav dav thaum lub sij hawm ua vaj tse thiab cov txheej txheem hardening, nws tuaj yeem them nyiaj rau cov pob zeb ua pob zeb, nrog rau qhov kub thiab txias shrinkage, ziab shrinkage thiab nws tus kheej shrinkage, yog li txo qhov tshwm sim ntawm pob zeb tawg. Tam sim no, MgO nthuav dav tus neeg sawv cev tau ua tiav rau cov pob zeb loj ntawm chaw nres tsheb hydropower thiab ua tiav cov txiaj ntsig zoo los tiv thaiv kev tawg. Txawm li cas los xij, muaj qee qhov kev tshawb fawb txog cov nyhuv ntawm shrinkage reducer thiab MgO nthuav tawm tus neeg sawv cev ntawm qhov tawg tsis kam ntawm lub ntsej muag pob zeb.
Post lub sij hawm: Mar-09-2022