Tej teeb meem thiab kev daws teeb meem ntawm Limestone

Huab cua:

Limestone exposed outdoors can deteriorate due to weathering or the natural effects of wind, rain and thermal changes. Limestone is very durable. However, it does absorb water, and because it's a carbonate rock, it's highly reactive when exposed to acid or even mildly acidic rainwater, and can deteriorate badly. The most common effect of weathering and erosion is the loss of precise detail.

Qhov teeb meem nrog huab cua yog qhov rov qab me ntsis ntawm ntug nthuav dav tshwj tsis yog rau re-sculpting pob zeb uas feem ntau tsis ua tau.

Staining:

Discoloration ntawm limestone, txawm hais tias dav dav los yog hauv zos, yog staining. Staining, tej zaum yuav tshwm sim los ntawm ntau yam ntawm cov khoom sab nrauv los yog sab hauv occlusions nyob rau hauv lub pob zeb los yog cov yam ntxwv ntsiab.

Cov stains no feem ntau yog tshwm sim los ntawm kev ua phem los yog siv. Ntau yam ntawm cov organic lossis inorganic roj yuav nqus tau rau hauv pob zeb thaum sib cuag. Qhov tob ntawm kev nkag mus yuav nyob ntawm qhov viscosity ntawm cov roj / roj, kub, pob zeb porosity, tiav thiab qhuav.

Cov tsos ntawm cov roj / roj stains feem ntau yuav muaj qhov tsaus ntuj ntawm lub pob zeb ntawm thaj tsam ntawm kev sib cuag. Cov npoo ntawm cov staining feem ntau yuav diffused, tshwj xeeb tshaj yog tom qab ncua sij hawm.Muaj cov txheej txheem rau kev tshem cov roj thiab roj stains.

Kev yaig:

Kev yaig tuaj yeem yog qhov tshwm sim ntawm huab cua dav dav tau piav qhia saum toj no, lossis nws yuav yog qhov tshwm sim hauv zos ntau dua raws li kev kho lossis raug. Nyob ntawm qhov kev taw qhia ntawm cov cua uas muaj zog, cua-tsav cua abrasives tuaj yeem xaiv tshem tawm cov ntsiab lus ntawm qee qhov siab. Ib qho ntawm ob peb txoj kev daws teeb meem zoo rau qhov teeb meem no yog kev kho kom zoo nkauj qhov chaw cog thiab / lossis qhov chaw siab tshaj tuaj yeem cuam tshuam cua. Xws li kev tsim kho vaj tse thiab / lossis kev muab qhab nia tuaj yeem muaj los ntawm qhov yooj yim thiab pheej yig mus rau kev cuam tshuam loj thiab kim. Nws yuav tsum ua raws li cov cai tsim nyog rau kev tswj hwm toj roob hauv pes. Txawm li cas los xij, muab lub neej ntev ntawm lub pov haum, nws yuav raug nqi - zoo. Cov tsos mob ntawm kev yaig tuaj yeem ua tau yooj yim raws li qhov poob ntawm ntug sharpness tau piav saum toj no, los yog nws tuaj yeem ua tau zoo heev, tshwj xeeb hnav vim kev sib cuag nrog kev tsim kho vaj tse thiab cov khoom siv mowing. Kev puas tsuaj hauv zos vim yog kev sib cuag nrog mowing lossis lwm yam khoom siv tu yog tiv thaiv tau. Yog tias muaj pov thawj ntawm kev puas tsuaj rau lub cev tsis tu ncua, yuav tsum tau ua cov kauj ruam los tiv thaiv cov peev txheej.

Kaw:

Qhov xwm txheej no qhia tau hais tias lub pob zeb muaj qee yam brittleness los yog nyiam tawg los yog yaj. Qhov no tej zaum yuav yog vim qhov tsis muaj zog ntawm cov limestone los yog maj mam tawg ntawm cov binder, los yog nws yuav yog qhov tshwm sim ntawm lwm yam uas cuam tshuam rau lub zog thiab lub zog. Durability ntawm limestone.

This can be caused by the use of de-icing salts or any other source of salt migration, such as can occur when humidity is rising. Once this happens, there is currently little way to repair the damage, but early detection of potential problems and elimination of salt sources is critical to stopping the process. When the condition is severe and clearly caused by heavy duty or improper use of deicing salt, it is sometimes referred to as "salting". Regular save maintenance can eliminate the cause of the crash, however, once this happens, its correction or repair is beyond the level of maintenance procedures.

Kev tawg:

Qhov xwm txheej no tshwm sim raws li cov kab nrib pleb hauv pob zeb uas tsawg dua 1/16 txog 1/2 nti dav lossis loj dua. Nws tuaj yeem tshwm sim los ntawm ntau yam laj thawj, xws li cov txheej txheem overloading vim kev sib haum xeeb, kev siv cov tshuaj khib nyiab uas nyuaj dhau, lossis cov khoom siv tsis raug. Kev tawg me ntsis yuav tsis yog qhov teeb meem ntawm nws tus kheej, tab sis nws yuav qhia tau tias muaj teeb meem ntawm cov txheej txheem, thiab qhov tawg tuaj yeem yog qhov taw qhia ntawm cov dej nkag mus rau sab hauv ntawm lub pob zeb, txhawb cov ntsev tsiv teb tsaws. Kev tawg uas tso cai rau dej los yog ntsev nkag mus rau hauv pob zeb ua rau muaj qhov ua tsis tau raws li cov pob zeb limestone thiab tuaj yeem ua rau muaj qhov tshwm sim tom ntej. Kev kho muaj xws li patching thiab hloov.