pob zeb yog cov khoom siv hauv tsev nrov. Nws yog ib lub pob zeb tau los ntawm hardening ib tug sib tov ntawm binder, fillers thiab dej, raws li zoo raws li additives. Ntau hom kev siv pob zeb yog txuam nrog ntau yam ntawm nws hom, muaj peev xwm ua haujlwm nyob rau hauv cov xwm txheej sib txawv thiab rau ntau lub hom phiaj.
1m3 pob zeb hnyav npaum li cas?
Tus nqi no yuav txawv nyob ntawm qhov muab tub lim. Qhov hnyav ntawm pob zeb hauv 1m3 yog, qhov tseeb, nws qhov ntom. Cov pawg hauv qab no ntawm cov pob zeb sib txawv:
- Lub Teeb - nrog qhov ntom ntawm 500-2000 kg / m 3. Nws yog ua tiav ob qho tib si ntawm ntxeem tau thiab ntom aggregates ntawm ntau qhov ntau thiab tsawg. Siv nyob rau hauv cov khoom ntim thiab cov kabmob thauj khoom, tseem nrov li thermal rwb thaiv tsev.
- Hav - nruab nrab ntom 2000-2500 kg/m3. Cov muaj pes tsawg leeg twb muaj denser fillers - limestone, granite thiab zoo sib xws pob zeb, ntau yam ntawm Portland cement feem ntau ua raws li ib tug astringent. Feem ntau, cov pob zeb no yog siv hauv kev tsim vaj tsev, rau cov qauv hydraulic thiab ua ib feem ntawm txoj kev thiab dav hlau pavements.
- Cov pob zeb hnyav hnyav muaj qhov ntom ntom tshaj 2500kg/m3. Scope ntawm daim ntawv thov - tshwj xeeb tsim, piv txwv li, nuclear fais fab nroj tsuag. Cov fillers yog cov hlau hnyav uas tuaj yeem tiv thaiv hluav taws xob.
Nws kuj tseem yuav tsum tau coj mus rau hauv tus account tias qhov hnyav ntawm pob zeb hauv 1m3 ntawm kev sib xyaw qhuav thiab tom qab sib xyaw nrog dej yuav txawv. Qhov no yog vim lub compaction ntawm cov khoom. Txawm tias qhov hnyav ntawm 1 m3 ntawm M200 pob zeb, piv txwv li, tuaj yeem sib txawv. Cov khoom siv qee zaum muaj qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv.
pob zeb tsis muaj pob zeb
Cov yam ntxwv tseem ceeb ntawm pob zeb yog chav kawm, Frost tsis kam, lub zog, noo noo tsis kam. Qhov taw qhia rau cov yam ntxwv no tau qhia nyob rau hauv lub cim ntawm pob zeb.
- Dej permeability yog cim nrog Latin tsab ntawv W nrog tus lej coefficient uas txiav txim siab lub siab ntawm lub dav hlau dej uas cov qauv ntawm cov pob zeb ntawm cov hom no nyob rau hauv daim ntawv ntawm lub tog raj kheej tuaj yeem tiv taus.
- Frost resistance, denoted los ntawm F, qhia tau hais tias muaj pes tsawg lub voj voog ntawm defrosting thiab tom qab khov (hauv lwm yam lus, lub caij ntuj no-lub caij ntuj sov hloov) pob zeb tuaj yeem tiv taus yam tsis muaj kev poob peev thiab lwm yam tseem ceeb. Qhov ntsuas no ua lub luag haujlwm tsuas yog rau huab cua txias xwb, thiab nyob rau hauv cov xwm txheej ntawm subtropics thiab tropics, qhov kub tsis poob qis heev uas cov pob zeb khov, thiab tsis yog txias xwb.
- Cov chav kawm thiab qib ntawm pob zeb txiav txim siab lub zog ntawm lub pob zeb.
Yuav tsum muaj rau cov khoom
Siv rau pob zebcov ntaub ntawv yuav tsum yog dawb ntawm txawv teb chaws. Koj yuav tsum xyuas kom meej tias cov xuab zeb muaj pes tsawg leeg muaj qhov tsawg kawg nkaus ntawm cov organic impurities, vim tias lawv txo qis lub zog ntawm pob zeb pob zeb. Cov kev cai tseem ceeb rau cov pob zeb crushed yog cov cim zoo ntawm lub zog thiab tsis kam mus rau qhov kub thiab txias. Raws li rau cov cement, nws cov hom yog 2-3 zaug siab dua li cov hom pob zeb ntawm qhov tawm. Dej yuav tsum huv si, tsis muaj tshuaj lom neeg thiab lom.
khoom noj khoom haus
Lawv tuaj yeem cuam tshuam nws cov khoom hauv ntau txoj hauv kev:
- nce kev txav ntawm qhov sib tov;
- tiv thaiv stratification thaum thauj;
- txo cov kua evaporation;
- kho qhov nrawm nrawm ntawm qhov sib tov;
- hloov qhov ntom, thiab li no qhov hnyav ntawm pob zeb hauv 1m3, qib ntawm porosity (vim qhov nkag ntawm huab cua, tsim ua npuas ncauj, gases, compaction);
- tiv thaiv ntau hom kev xeb;
- kom muab cov khoom tshwj xeeb (piv txwv li, tswj hluav taws xob conductivity).
Cov khoom siv ntxiv yog siv, uas yog, lawv muaj kev cuam tshuam rau ntau qhov chaw.
Muas lossis ua koj tus kheej?
Qhov zoo ntawm cov qauv tsim los ntawm nws, lawv cov kav ntev thiab kev nyab xeeb thaum lub sijhawm ua haujlwm yog nyob ntawm kev xaiv muaj peev xwm ntawm cov khoom sib xyaw ua ke. Yog li ntawd, koj yuav tsum tsis txhob txuag ntawm cov khoom. Txawm hais tias, yog tias xav tau, koj tuaj yeem sib xyaw ua vaj tse nrog koj tus kheej txhais tes, kev siv cov khoom lag luam zoo dua. Mortar qhob units tsis tu ncua saib xyuas qhov zoo ntawm cov khoomthiab sib tov nws tus kheej, ua kev hloov kho, uas txhais tau hais tias qhov hnyav ntawm pob zeb hauv 1m3 thiab lwm yam tsim nyog yuav raug soj ntsuam.
Yog tias koj tseem xav tau cov pob zeb ntawm koj tus kheej, tom qab ntawd cov ntaub ntawv tswj hwm muaj cov txheej txheem kom nkag siab meej thiab nkag siab. Txhawm rau xam qhov hnyav ntawm pob zeb hauv 1m3 thiab xaiv qhov sib npaug ntawm cov khoom, kuj tseem muaj cov khoos phis tawj thiab ntau lub tshuab xam zauv online uas ua haujlwm tib yam.
Rau feem ntau, lawv suav nrog tsuas yog qib xav tau ntawm cov pob zeb, qib ntawm cov cement siv thiab cov feem ntawm cov fillers, txawm li cas los xij, ntxiv rau cov yam ntxwv no, qhov tseeb proportions kuj tseem cuam tshuam los ntawm cov dej noo. cov ntsiab lus ntawm cov xuab zeb thiab pob zeb crushed.
