2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-18 12:13
Kev tsim kho pob zeb tawg yog ib yam tseem ceeb ntawm kev sib sau ua ke, asphalt, txoj kev thiab txoj kev tsheb nqaj hlau. Cov pob zeb tsoo, uas muaj qhov zoo nkauj zoo nkauj, tau siv los ua cov khoom zoo nkauj ntawm cov toj roob hauv pes. Tso tawm hauv tons thiab hauv hnab.
Yam ntxwv
Kev tsim kho pob zeb tawg yog cov khoom siv thoob ntiaj teb rau kev tsim kho, kho thiab teeb tsa cov khoom thiab thaj chaw rau ntau lub hom phiaj. Nws cov yam ntxwv tseem ceeb yog tiv taus te thiab lub zog. Frost tsis kam yog tus nqi sib npaug rau tus naj npawb ntawm cov khov thiab mus sij hawm ntev mus los.
Nws tau paub tias thaum microcracks tsim ntawm ib lub pob zeb, tsis hais nws loj npaum li cas, dej nkag rau hauv lawv . Khov, nws kis mus rau txhua qhov chaw; dej khov siv ib feem kaum ntau dua li cov kua ua kua hauv nws lub xeev qub. Lub pob zeb muaj zog tshaj plaws yuav tawg hauv qab cov dej khov.
Tus naj npawb ntawm khov -thaw mus yuav ib hnub mus txog qhov tseem ceeb - lub pob zeb yuav riddled nrog cov kab nrib pleb uas nws yuav tig mus ua pob zeb tawg.
Hais txog kev tiv taus te, pob zeb tawg sib txawv hauv ntau hom khoom lag luam
- Kev faib ua feem feem ntau suav nrog cov khoom ntawm pob zeb tawg F-200/300/400 . Cov pob zeb tawg no yog qhov tsim nyog rau kev tsim kho cov tsev siab, choj, sab nrauv pov tseg, piers hauv hiav txwv thiab dej chaw nres nkoj, nrog rau sab qaum teb latitudes.
- Hom F-50/100/150 tau siv nyob hauv txoj kab nruab nrab thiab sab qab teb ntawm Russia .
- Cov pab pawg sib txawv - F15 / 25 /40 . Rubble no yuav tsum tsis txhob thauj khoom. Nws tsuas yog nchuav mus rau txoj kev thiab txoj kev taug kev, tso rau hauv cov dej hauv qab GWL. Nws yog siv feem ntau rau kev ua haujlwm sab hauv: rau cov cua sov ntawm cov tsev, nrog rau cov chaw kho mob.
Kev ntsuas ntawm qhov ntsuas tsis kam tiv thaiv te yog nqa tawm ntawm qhov qhib ib feem. Nkag mus rau hauv cov pob zeb, cov pob zeb tawg tau txais qhov khov ntxiv ntxiv - ntawm txhua sab pebbles tau puag ncig los ntawm cov cement -sand mortar, thiab cov yam ntxwv no txhim kho txog 40%. Lub zog ntawm cov pob zeb tawg yog tsis muaj qhov tseem ceeb tsawg dua qhov tiv taus kom khov, qhov taw qhia. Hauv cov chaw soj nstuam, lub pob zeb raug tsoo, ua kom nrawm dua.
Cov txiaj ntsig sib xws rau qee qib ntawm cov pob zeb tawg - hais txog lub zog - tau qhia hauv cov lus
| Npav | Pawg neeg muaj zog |
| M-1600 … M-1400 | Ntxiv ruaj |
| M-1400 … M-1200 | Siab zog |
| M-1200 … M-800 | Lub zog qub |
| M-800 … M-600 | Txo lub zog |
| M-600 … M-300 | Tsis muaj zog |
| M-200 thiab phem dua | Tshwj xeeb tsis muaj zog |
Kev kos lub zog yog txiav txim siab los ntawm cov ntsiab lus ntawm impurities tsis heev ntom nyob rau hauv ua raws li tag nrho qhov hnyav ntawm cov pob zeb tawg. Ib feem ntawm qhov kev xeem raug sim nrog lub nra sib npaug kwv yees li 200 lub ntiaj teb huab cua. Cov tsiaj tsis muaj zog tau sib xyaw hauv feem pua sib txawv:
- M -1600 - tsawg dua 1%;
- M-1400 … M-1000-nce txog 5%;
- M-800 … M-400-nce txog 10%;
- M-300 … M-200-nce txog 15%.
Pob zeb tsoo nrog ntau dua 1/5 ntawm qhov tsis muaj zog los ntawm qhov hnyav hu ua pob zeb. Nws yog siv rau kev sau ib ntus thiab txoj kev theem thib ob, qhov twg asphalt thiab pob zeb tsis tas yuav siv. Nws lub hom phiaj thib ob yog cov plag tsev nyuaj hauv tsev, kev tsim vaj tsev nyob ib ntus, kev teeb tsa cov chaw siv hluav taws xob thiab lwm yam uas tsis tseem ceeb.
Hauv qee kis, pob zeb raug ntxuav kom huv los ntawm hmoov av, av nplaum, xuab zeb seem thiab lwm yam suav nrog uas txo qis, piv txwv li, lub zog ntawm lub hauv paus.
Saib
Cov pob zeb tawg yog tsim los ntawm txoj kev tshuaj xyuas tawm pob zeb txua zeb thaum lub sij hawm puas tsuaj ntawm cov pob zeb los ntawm kev tawg. Cov pob zeb tsis ruaj khov dua li granite, muaj cov xim txho. Qhov zoo ntawm cov khoom siv hauv tsev no yog raws li hauv qab no.
- nws tau khawb hauv ntau qhov chaw, cov tuam txhab tsim nws tau sib tw tas li nrog txhua lwm yam;
- tus nqi qis - pob zeb tsoo tau nthuav dav;
- cov txheej txheem tsim khoom yooj yim, tsis muaj hluav taws xob tsawg.
Hais txog kev faib ua feem, cov khoom yog npaj rau cov haujlwm hauv qab no:
- txog li 10 hli (tshuaj ntsuam xyuas) - siv rau sau cov kev thiab txoj kev taug kev;
- txog 20 hli - yog siv rau kev tsim cov paving slabs;
- mus txog 40 hli - ntxiv rau cov pob zeb ua vaj khoom;
- 20-40 mm - hauv kev ua vaj tsev rau nchuav lub hauv paus.
Limestone tsoo pob zeb - calcium carbonate - cov khoom sib xyaw ua ke kom zoo ib yam . Nws zoo li pob zeb. Cov xim dawb, zoo li ntxim nyiam. Granite crushed pob zeb yog mined los ntawm kev tawg ntawm cov pob zeb ntom ntom (pob zeb ntuj). Tsis tas li ntawd, lub pob zeb ua tau raug tsoo thiab sieved. Muaj xim liab. Cov npoo tawg ntawm txhua lub pob zeb ua kom zoo rau cov cement-sand filler. Qhov ci ntawm lub pob zeb tsis huv ntawm cov pob zeb tawg no ua rau pom qhov ntxim nyiam rau hauv pem teb jellied. Piv rau cov limestone thiab pob zeb, cov khoom siv tsis muaj zog, muaj pes tsawg leeg ntawm cov pob zeb tawg tau muaj pob zeb loj txog 12 cm. Qhov yuav tsum tau ua yog siab tshaj plaws.
Slag crushed pob zeb yog tsim los ntawm kev pov tseg ntawm cov hlau thiab cov hlau tsis yog hlau . Ua tsaug rau qhov no, cov khoom siv pob zeb yog qhov pheej yig dua li cov khoom uas muaj pob zeb tsoo. Secondary crushed pob zeb - cib, pob zeb, ua npuas ncauj thiab nkev -thaiv tawg (ua cov khoom siv pov tseg). Cov khoom siv ua vaj tsev tuaj yeem siv tau. Secondary crushed pob zeb yog ib nrab tus nqi ntawm granite.
Daim ntawv thov hauv kev tsim kho
Cov pob zeb tawg tau ua lub luag haujlwm tseem ceeb
- Mus txog 5 hli . Cov khoom xav tau los ua cov ntaub npog hauv vaj lossis hauv chaw ua kis las. Ntawm txoj kev, pob zeb tawg no yog siv rau cov dej nag los.
- 0.5-2 cm ntev . Mus rau hauv kev ua vaj tse nrog granite crushed. Lawv tau muab txoj hauv kev thib ob. Cov asphalt qub kuj tseem siv tsis yog pob zeb. Qhob nrog cov feem no yog siv hauv tshav dav hlau.
- 2-4 cm ntev . Lawv tau nchuav lub txaj zeb hauv qab txoj kev loj, txhawb lub hauv paus ntawm cov tsev tsim khoom, kev tsheb nqaj hlau.
- 2-7 cm ntev . Cov khoom siv yog thawj txheej rau lub tshav dav hlau, cov choj thiab cov tsev siab.
- 7 cm los yog ntau dua . Nws yog siv los ua kev dai kom zoo nkauj rau pas dej da dej, pas dej, toj roob hauv pes alpine thiab lwm yam khoom siv toj roob hauv pes.
Tsis tas li, los ntawm kev sib xyaw cov feem sib txawv ntawm cov pob zeb tawg, lawv ua tiav kev ua kom muaj zog ntxiv.
Pom zoo:
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Cov kws sau ntawv hauv tsev yog cov cuab yeej zoo tshaj plaws rau rov ua dua tsev neeg pov tseg. Yuav ua li cas cov khoom noj hauv chav ua noj khib nyiab ua haujlwm hauv chav tsev? Yuav xaiv lawv li cas?
