Qhob yog ib qho ntawm cov khoom siv hauv tsev qub tshaj plaws. Kev khawb ntawm qhov chaw qub ntawm tib neeg nyob hauv ntiaj teb tau pom tias nws siv tau pib ntau dua 6 txhiab xyoo dhau los. Thiab tam sim no, nws tseem nyob, kab tias, feem ntau ntawm cov khoom siv hauv tsev. Cia peb xav txog qhov nthuav dav ib ntawm nws ntau yam - B25-concrete.
pob zeb zoo
Qhov taw qhia zoo ntawm pob zeb yog compressive zog. Cov yam ntxwv no uas txiav txim siab hauv chav kawm ntawm pob zeb yog qhia los ntawm tsab ntawv "B" (Latin) thiab cov lej sib raug (hauv kg ib square cm) rau qhov tso cai thauj khoom ntawm nws. Yog li, chav kawm B25 pob zeb tuaj yeem tiv taus qhov hnyav ntawm 25 kg / sq. pom cov qauv ntawm cov chav kawm no, suav nrog cov coefficients, muaj peev xwm tiv taus qhov hnyav ntawm 327 kg / sq. cm, uas sib haum mus rau qib M350.
Kev Ua Haujlwm
tus yam ntxwv no txiav txim siab qhov ua tau zoo ntawm pob zeb thaum nws siv. Raws li GOST 7473-94, tus yam ntxwv no raug txheeb xyuas los ntawm tsab ntawv "P" thiab tus lej ntawm 1 txog 5, sib raug raumovable pob zeb nrog ib tug nruj ntawm tsawg tshaj li 4 vib nas this thiab subdivided raws li cov qauv ntawm lub khob hliav qab. Hauv qhov no, cov qauv ntawm lub khob hliav qab yog (hauv centimeters) 1-4, 5-9, 10-15, 16-20 thiab tshaj 21 rau qib ntawm P1 txog P5, raws li.
Scope of application
Concrete B25 (qib M350) tau nrov heev tsis ntev los no, vim yog qhov xav tau ntawm txoj haujlwm nyuaj thiab nce kev tswj hwm lawv txoj kev ua raws cai. Qhov no yog vim li cas vim li cas lub hom phiaj no tau pib ua haujlwm siab tshaj plaws hauv kev muag khoom ntawm cov khoom vaj khoom tsev.
Cov yam ntxwv muaj zog siab yog muab los ntawm ntau cov cement zoo hauv cov ntsiab lus ntawm B25 (pob zeb). Yog li ntawd, cov khoom siv no feem ntau siv tau rau hauv kev tsim kho ntawm ntau-storey tsev, rau kev tsim cov pob zeb hnyav hnyav (kab, qab nthab, kab), suav nrog cov tsim los rau kev ua haujlwm hnyav.
Nyob rau hauv nws cov muaj pes tsawg leeg, B25-pob zeb feem ntau muaj, ntxiv rau cov cement, crushed granite los yog gravel thiab ntxuav dej xuab zeb. Hauv kev lag luam khoom siv hauv tsev, nws tuaj yeem xaj nrog kev xa khoom hauv cov pob zeb sib xyaw ua ke hauv daim ntawv hu ua npaj sib xyaw ua ke nrog kev txav mus los P2-P4.
Concrete B25 (qib M350) yog tus cwj pwm los ntawm cov txiaj ntsig siab ntawm Frost tsis kam thiab dej tsis kam. Yog li ntawd, nws yog dav siv rau kev npaj monolithic foundations (slab, columnar, pawg-grillage thiab daim kab xev), nrog rau cov pob zeb ntaiv. Los ntawm nws hauv tsev neeg ntiag tug (thiab hauv kev lag luam sector) lub tais ntawm pas dej, monolithic pem teb slabs thiabphab ntsa. B25 pob zeb muaj zog heev thiab tiv taus kev puas tsuaj. Hom no yog siv, tshwj xeeb tshaj yog rau kev tsim cov airfield txoj kev slabs, uas yog siv nyob rau hauv tshwj xeeb tshaj yog hnyav huab cua. Hauv kev tsim kho kev lag luam, nws kuj tau siv dav los kho dua tshiab thiab ua kom muaj kev ntseeg siab ntawm cov tsev thiab lwm qhov chaw.
Concrete B25: nqe
Tus nqi ntawm hom pob zeb no hauv cov xwm txheej niaj hnub no txawv ntawm cov neeg tsim khoom hauv ntau qhov sib txawv. Nws nyob ntawm cov yam ntxwv xws li kev sib thooj rau cov chaw txua txiag zeb-cov khoom siv raw khoom thiab cov neeg siv khoom ntawm cov khoom, qhov muaj ntawm nws lub tsev rau khoom, kev thauj mus los thiab kev muag khoom, thiab thaum kawg, ntawm lub koob npe nrov ntawm cov chaw tsim khoom hauv cov khoom siv hauv tsev. Tus nqi kuj nyob ntawm seb qhov kev txav mus los ntawm cov pob zeb: qhov siab dua, cov khoom kim dua. Tus nqi kuj txawv nyob ntawm qhov muab tub lim. Gravel-based pob zeb feem ntau pheej yig dua li cov khoom siv pob zeb. Txawm tias pheej yig dua yog cov khoom siv los ntawm cov pob zeb thib ob uas tau los ntawm crushing pob zeb. Qhov nruab nrab, B25 pob zeb tuaj yeem yuav tau (tsis suav nrog kev xa khoom) ntawm tus nqi ntawm 3,000 txog 3,800 rubles. rau m3.
Ua koj tus kheej
Thaum qhov yuav tsum tau ntim me me, B25 pob zeb tuaj yeem tsim los ntawm nws tus kheej. Txhawm rau ua qhov no, sib tov cov cement, xuab zeb thiab muab tso rau hauv cov khoom ntim hauv qab no: rau cov cement M500 - 1: 1, 9: 3, 6; rau cement M400 - 1: 1, 5: 3, 1. Cov dej yog ntxiv rau hauv ib qho nyiaj uas ua kom lub siab xav tau. Qhov twgQee cov cai yuav tsum ua raws li:
- siv cov cuab yeej huv thiab dej;
- nws yog qhov zoo dua los siv cov xuab zeb ntxuav, pob zeb lossis pob zeb crushed (av nplaum impurities txo lub zog ntawm cov khoom);
- koj tsis tuaj yeem ntxiv dej tom qab sib tov cov tshuaj (thaum nws ntxiv, lub zog ntawm cov khoom poob);
- Cov tshuaj yuav tsum tau siv nyob rau hauv ib teev ntawm kev npaj.
Raws li kev muab tub lim, koj tuaj yeem siv gravel, crushed pob zeb ntawm granite pob zeb, limestone lossis theem nrab. Txhawm rau kom tau txais cov pob zeb qib M350, cov khoom ntim xws li cov av nplaum nthuav dav, slag thiab lwm cov pob zeb ntxeem tau tsis siv, uas tsis muab lub zog ntawm cov khoom siv.
Yog li, hauv kab lus no peb tau tshuaj xyuas cov ntaub ntawv hais txog ib hom kev ua vaj tse, feem ntau siv tau rau cov khoom tsim thiab cov tsev muaj zog. Peb cia siab tias cov lus qhia hauv kab lus yuav muaj txiaj ntsig rau koj.
