Dab tsi yog permeable pob zeb ua los ntawm?

Pervious pob zeb, tseem hu ua permeable qhob lossis porous pob zeb, yog tsim los ntawm kev sib xyaw ntawm cov cement, aggregate thiab dej, zoo ib yam li cov pob zeb niaj hnub. Txawm li cas los xij, txhawm rau ua tiav nws cov permeability, muaj qee qhov sib txawv tseem ceeb hauv nws cov muaj pes tsawg leeg. Qhov sib txawv tseem ceeb yog kev siv cov aggregates loj dua thiab txo qis ntawm cov khoom zoo hauv cov khoom sib tov. Qhov no tsim cov voids loj dua los yog qhov chaw nyob hauv cov pob zeb uas tso cai rau dej hla tau yooj yim. Cov khoom siv sib xyaw ua ke tuaj yeem ua tau ntau yam xws li cov pob zeb crushed, gravel los yog cov khoom hnyav hnyav. Txhawm rau ua kom lub zog thiab ua haujlwm ntev ntawm cov pob zeb permeable, cov cement thiab dej tseem yog cov khoom xyaw tseem ceeb. Cement ua raws li kev sib khi los tuav cov aggregate ua ke, thaum dej yog tsim nyog rau hydration thaum lub sij hawm kho. Ntxiv nrog rau cov khoom xyaw txheem, cov pob zeb pervious yuav muaj lwm yam additives lossis admixtures. Cov additives no txhim kho cov khoom ntawm pob zeb, xws li ua kom nws lub zog, txo cov kab nrib pleb, lossis ua kom nws cov permeability. Qee qhov piv txwv ntawm cov khoom siv feem ntau siv rau hauv cov pob zeb pervious muaj xws li silica fume, ya tshauv, lossis lwm yam khoom siv pozzolanic. Cov ntaub ntawv no pab ua kom muaj kev sib raug zoo nyob rau hauv lub pob zeb matrix, uas ua rau muaj zog thiab ruaj khov nto. Zuag qhia tag nrho, qhov tshwj xeeb proportions thiab cov ntaub ntawv siv yuav txawv nyob ntawm seb lub hom phiaj daim ntawv thov ntawm cov pob zeb thiab qhov yuav tsum tau permeability. Txawm li cas los xij, cov khoom xyaw tseem ceeb ntawm cov pob zeb permeable yog cov cement, aggregate thiab dej, nrog rau cov khoom tsim nyog ntxiv ntxiv kom ua tiav nws cov khoom permeable.

Yog tias koj muaj lus nug tshwj xeeb lossis xav tau tshwj xeeb ntxiv txog cov pob zeb permeable, koj tuaj yeem sab laj nrog tus kws tshaj lij cov chaw tsim khoom.

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