Txij ancient sij hawm cov neeg siv cov limestone rau kev tsim kho. Tsis tas li ntawd, qhov no yog ib tug sedimentary pob zeb yog heev txawv los ntawm lub softness ntawm granite thiab lwm yam pob zeb. Lub txiv qaub gravel daim ua los ntawm khoom natural khoom, uas muaj mas calcium carbonate (calcite).
General ntaub ntawv txog kev tsim kho cov ntaub ntawv
Limestone yog mined txhua txhia qhov chaw nyob rau hauv central Russia, vim hais tias nws yog haum lug faib, ib qho yooj yim rau cov txheej txheem thiab muaj zoo heev tshuaj thiab lub zog. Uas yog vim li cas nws yog siv li dav nyob rau hauv kev tsim kho, qab tsuas xuab zeb thiab gravel cov ntaub ntawv. Txiv qaub rubble yuav ua tau txawv ntxoov. Nws xim nyob rau hauv ib lub ntau yam ntawm inclusions thiab impurities. Feem ntau cov feem ntau, qhov no cov ntaub ntawv uas muaj ib tug whitish, xim av, los yog txho. Nyob rau hauv ib co thaj tsam nws yog hu ua dolomite rubble. Nws tej ceev yog 2.2-2.7. Txiv qaub gravel yog tau los ntawm crushing ib tug natural mineral. Tom qab ntawd, nws muaj ib tug tshwj xeeb tshuaj kho mob. Cov lwm hom gravel uas pheej yig tshaj.
Txiv qaub rubble: kev siv nyob rau hauv lub teb chaws kev khwv nyiaj txiag
Vim qhov no cov ntaub ntawv uas yog tsis ruaj tsis khov pob zeb, qhov kawg khoom tau therefrom kuj muaj ib tug uas tsis muaj lub dag lub zog. Heev feem ntau limestone gravel siv rau txoj kev ua hauj lwm. Peb yuav tsum tsis txhob hnov qab tias nws yog haum yooj yim qhov muag plooj, uas ho thiaj li cov kev pab cuam lub neej ntawm lub pavement. Uas yog vim li cas lawv tsuas sprinkle lub txoj kev nrog me ntsis tsheb load.
Tsis ntev los no, lub tuam tsev no cov ntaub ntawv uas yog nce siv rau zus tau tej cov ntau yam blocks ntawm vaj tse thiab pob zeb ua khoom. Feem ntau nws yog siv rau kev tsim kho av. Vim hais tias limestone rubble muaj ib tug uas tsis muaj keeb kwm yav dhau tawg, muaj coob tus neeg xav kom muab nws nrog lwm hom ntawm crushed pob zeb thiab pob zeb ua. Qhov no sib tov ntawm cov ntaub ntawv yog zoo meej rau decorating courtyards thiab driveways. Cov feem nrov nws muaj tus tswv ntawm me me thaj av. Vim nws txhua yam khoom thiab tus nqi qis, nws muaj peev xwm txo tau tus nqi ntawm tag ua hauj lwm.
Qhov no gravel yuav siv tau rau raug tsev txiv qaub, dej qab zib, calcium carbide, chiv, fluxes rau steel ntau lawm. Nws yog siv raws li ib tug tub lim nyob rau hauv ntau yam coj mus muag mixtures nyob rau hauv lub printing thiab iav industries. Los ntawm nws tsim ib tug flux rau zus tau tej cov Portland MAAs.
Tus nqi ntawm cov tsev ntaub ntawv
Qhov zoo tshaj ntawm lub tuam tsev no cov ntaub ntawv uas normalizes GOST. Crushed limestone fractions 40h70 cim 400 yog 401 rubles. / T. Yog hais tias peb tham txog lwm txoj kev 20x40, nws nqi - 436 rubles / t. thiab 5x20 -. 531 rubles / t (xws li VAT). Feem ntau ntawm cov tuam txhab uas muag uas ua lub tsev ntaub, ua limestone rubble hom 600. Khw muag khoom nqi mus rau txawv fractions txawv me ntsis xwb. Yog li, nyob rau hauv Moscow (Moscow) rubble 40h70, 20x40 muaj nqis 850 rubles / cubic Meter, thiab tus me 5x20 - .. 870 rubles / cubic Meter .. (Nrog VAT). Qhov zoo tshaj ntawm lub tsev cov ntaub ntawv uas yuav tsum ua raws li cov uas yuav tsum tau ntawm GOST8267-93.