Qee zaum cov kab nrib pleb yuav tsum tau kho, tab sis muaj ntau txoj kev xaiv, peb yuav tsim thiab xaiv qhov kev kho zoo tshaj plaws li cas? Qhov no tsis nyuaj li koj xav.
Tom qab tshawb xyuas cov kab nrib pleb thiab txiav txim siab cov hom phiaj kho, tsim lossis xaiv cov khoom kho kom zoo tshaj plaws thiab cov txheej txheem yog qhov yooj yim heev. Cov ntsiab lus ntawm kev kho cov kab nrib pleb no suav nrog cov txheej txheem hauv qab no: ntxuav thiab sau, nchuav thiab ntim / ntim, epoxy thiab polyurethane txhaj tshuaj, kho tus kheej, thiab "tsis kho".
Raws li tau piav nyob rau hauv "Part 1: Yuav ua li cas ntsuas thiab teeb meem cov pob zeb tawg", kev tshawb xyuas cov kab nrib pleb thiab txiav txim siab lub hauv paus ua rau cov kab nrib pleb yog tus yuam sij rau xaiv txoj kev kho qhov tawg zoo tshaj plaws. Nyob rau hauv luv luv, cov khoom tseem ceeb uas yuav tsum tau tsim kho kom zoo tawg yog qhov nruab nrab tawg dav (nrog rau qhov tsawg kawg nkaus thiab siab tshaj qhov dav) thiab kev txiav txim siab seb qhov tawg puas ua haujlwm lossis dormant. Tau kawg, lub hom phiaj ntawm kev kho qhov tawg yog qhov tseem ceeb xws li ntsuas qhov dav ntawm qhov tawg thiab txiav txim siab qhov muaj peev xwm ntawm kev tawg mus rau yav tom ntej.
Cov kab nrib pleb yog txav thiab loj tuaj. Piv txwv xws li cov kab nrib pleb uas tshwm sim los ntawm cov av tsis tu ncua los yog cov kab nrib pleb uas yog shrinkage / expansion pob qij txha ntawm cov tswv cuab pob zeb lossis cov qauv. Cov kab nrib pleb dormant ruaj khov thiab tsis xav tias yuav hloov pauv yav tom ntej. Feem ntau, qhov tawg tshwm sim los ntawm qhov shrinkage ntawm pob zeb yuav ua haujlwm heev thaum pib, tab sis raws li cov ntsiab lus ntawm cov pob zeb stabilizes, nws yuav nws thiaj li stabilize thiab nkag mus rau hauv lub xeev dormant. Tsis tas li ntawd, yog tias cov hlau tuav txaus (rebars, steel fibers, lossis macroscopic hluavtaws fibers) dhau los ntawm cov kab nrib pleb, kev txav mus tom ntej yuav raug tswj thiab cov kab nrib pleb yuav raug suav tias yog nyob rau hauv lub xeev dormant.
Rau cov kab nrib pleb dormant, siv cov khoom siv kho kom nruj lossis hloov tau yooj yim. Cov kab nrib pleb yuav tsum tau hloov kho cov ntaub ntawv thiab cov kev tsim tshwj xeeb kom tso cai rau kev txav mus tom ntej. Kev siv cov khoom siv kho kom nruj rau cov kab nrib pleb feem ntau ua rau tawg ntawm cov khoom kho thiab / lossis cov pob zeb uas nyob ib sab.
Yees duab 1. Siv rab koob tip mixers (No. 14, 15 thiab 18), low-viscosity fix material can be easy injection into hairline cracks without wiring Kelton Glewwe, Roadware, Inc.
Ntawm chav kawm, nws yog ib qho tseem ceeb los txiav txim siab qhov ua rau ntawm qhov tawg thiab txiav txim siab seb qhov tawg puas yog qhov tseem ceeb. Cov kab nrib pleb uas qhia tau tias tsim tau, nthuav dav, lossis kev tsim kho tsis raug tuaj yeem ua rau tib neeg txhawj xeeb txog lub peev xwm thauj khoom thiab kev nyab xeeb ntawm cov qauv. Cov kab nrib pleb no tuaj yeem ua qhov tseem ceeb. Kev tawg tuaj yeem tshwm sim los ntawm kev thauj khoom, lossis nws yuav muaj feem cuam tshuam nrog qhov hloov pauv ntawm cov pob zeb hauv av, xws li qhuav shrinkage, thermal expansion thiab shrinkage, thiab tej zaum yuav los yog tsis tseem ceeb. Ua ntej xaiv qhov kev xaiv kho, txiav txim siab qhov laj thawj thiab xav txog qhov tseem ceeb ntawm kev tawg.
Kev kho cov kab nrib pleb uas tshwm sim los ntawm kev tsim, nthuav dav tsim, thiab kev tsim ua yuam kev yog dhau ntawm cov kab lus yooj yim. Qhov teeb meem no feem ntau yuav tsum tau muaj kev ntsuam xyuas cov qauv thiab tej zaum yuav xav tau kev kho tshwj xeeb.
Txhim kho cov txheej txheem kev ruaj ntseg lossis kev ncaj ncees ntawm cov khoom ua vaj tse, tiv thaiv cov dej los yog sealing thiab lwm yam teeb meem (xws li deicing chemicals), muab kev txhawb nqa ntawm ntug kev tawg, thiab kev txhim kho cov tsos ntawm cov kab nrib pleb yog cov hom phiaj kho. Xav txog cov hom phiaj no, kev saib xyuas tuaj yeem muab faib ua peb pawg:
Nrog rau qhov muaj koob meej ntawm cov pob zeb thiab kev tsim vaj tse, qhov kev thov rau kev kho kom zoo nkauj tawg yog nce. Qee lub sij hawm kho kev ncaj ncees thiab tawg sealing / sau kuj yuav tsum tau kho kom zoo. Ua ntej xaiv kho tshuab, peb yuav tsum qhia meej lub hom phiaj ntawm kev kho qhov tawg.
Ua ntej tsim kho qhov tawg lossis xaiv txoj kev kho, plaub nqe lus nug tseem ceeb yuav tsum tau teb. Thaum koj teb cov lus nug no, koj tuaj yeem yooj yim xaiv qhov kev xaiv kho.
Yees duab 2. Siv daim kab xev nplaum, qhov drilling qhov, thiab cov roj hmab-lub taub hau sib xyaw raj txuas nrog rab phom ob rab phom, cov khoom kho tuaj yeem raug txhaj rau hauv cov kab nrib pleb hauv qab qis. Kelton Glewwe, Roadware, Inc.
Cov txheej txheem yooj yim no tau dhau los ua neeg nyiam, tshwj xeeb tshaj yog rau kev kho vaj tsev, vim tias kho cov ntaub ntawv uas muaj viscosity tsawg heev tam sim no muaj. Txij li cov ntaub ntawv kho no tuaj yeem yooj yim ntws mus rau hauv cov kab nrib pleb los ntawm lub ntiajteb txawj nqus, tsis tas yuav tsum tau xaim (xws li nruab ib lub square lossis V-shaped sealant reservoir). Txij li cov xov hlau tsis tas yuav tsum tau, qhov kawg kho qhov dav yog tib yam li cov kab nrib pleb, uas tsis tshua pom tseeb dua cov kab nrib pleb. Tsis tas li ntawd, kev siv cov hlau txhuam hniav thiab lub tshuab nqus tsev vacuum yog nrawm dua thiab kev lag luam ntau dua li kev xaim.
Ua ntej, ntxuav cov kab nrib pleb kom tshem tawm cov av thiab cov khib nyiab, thiab tom qab ntawd sau nrog cov khoom siv kho cov viscosity tsawg. Cov chaw tsim tshuaj paus tau tsim ib txoj kab uas hla me me sib tov nozzle uas txuas nrog ib rab phom rab phom ob rab phom los txhim kho cov khoom siv (duab 1). Yog hais tias lub taub hau ntawm lub taub hau loj dua li qhov dav ntawm qhov tawg, qee qhov kev sib tsoo yuav tsum tau tsim kom muaj qhov funnel kom haum raws li qhov loj ntawm lub taub hau. Tshawb xyuas cov viscosity hauv cov ntaub ntawv tsim khoom; qee cov tuam ntxhab qhia qhov tsawg kawg nkaus tawg dav rau cov khoom siv. Ntsuas nyob rau hauv centipoise, raws li tus nqi viscosity txo, cov khoom yuav thinner los yog yooj yim dua ntws mus rau hauv cov kab nrib pleb. Ib txoj kev txhaj tshuaj qis qis kuj tseem siv tau los txhim kho cov khoom kho (saib daim duab 2).
Yees duab 3. Kev sib txuas thiab kev sib khi yog thawj zaug txiav lub thawv ntim nrog lub voj voog lossis V-zoo li tus hniav, thiab tom qab ntawd sau nws nrog cov sealant tsim nyog lossis muab tub lim. Raws li pom nyob rau hauv daim duab, lub routing tawg yog ntim nrog polyurethane, thiab tom qab kho, nws yog khawb thiab ntws los ntawm qhov chaw. Kim Basham
Qhov no yog cov txheej txheem ntau tshaj plaws rau kev kho qhov sib cais, nplua thiab tawg loj (duab 3). Nws yog ib qho kev kho uas tsis yog kev tsim kho uas suav nrog kev nthuav tawm cov kab nrib pleb (txhim kho) thiab sau lawv nrog cov sealants tsim nyog lossis cov khoom ntim. Nyob ntawm qhov loj thiab cov duab ntawm lub sealant reservoir thiab hom sealant los yog muab tub lim siv, thaiv thiab sealing tuaj yeem kho cov kab nrib pleb thiab dormant tawg. Txoj kev no yog qhov tsim nyog rau qhov chaw kab rov tav, tab sis kuj tuaj yeem siv rau qhov chaw ntsug nrog cov ntaub ntawv kho tsis-sagging.
Cov khoom siv kho kom zoo muaj xws li epoxy, polyurethane, silicone, polyurea, thiab polymer mortar. Rau hauv pem teb slab, tus tsim qauv yuav tsum xaiv cov khoom siv uas tsim nyog thiab hardness los yog nruj cov yam ntxwv kom haum raws li cov kev xav tau hauv pem teb thiab kev txav mus tom ntej. Raws li qhov yooj yim ntawm cov sealant nce, qhov kam rau ua kom tawg thiab txav mus los, tab sis cov khoom siv lub peev xwm thauj khoom thiab kev sib tsoo ntug yuav txo qis. Raws li lub hardness nce, lub peev xwm load-bearing thiab tawg ntug kev txhawb nqa nce, tab sis qhov tawg txav kam rau siab txo.
Daim duab 1. Raws li Shore hardness tus nqi ntawm cov khoom nce, lub hardness los yog nruj ntawm cov khoom nce thiab qhov yooj yim txo. Txhawm rau tiv thaiv cov npoo ntawm cov kab nrib pleb uas raug rau cov log tsheb nyuaj los ntawm tev tawm, Lub Hiav Txwv hardness tsawg kawg yog li 80 yuav tsum tau. Kim Basham nyiam cov khoom siv kho dua tshiab (fillers) rau cov kab nrib pleb nyob rau hauv cov log tsheb nyuaj, vim tias cov npoo tawg tau zoo dua li pom hauv daim duab 1. Rau cov kab nrib pleb, cov sealants hloov tau zoo dua, tab sis lub peev xwm thauj khoom ntawm lub sealant thiab tawg ntug kev them nyiaj yug yog tsawg. Tus nqi ntawm Shore hardness muaj feem xyuam rau qhov hardness (los yog yooj) ntawm cov khoom kho. Raws li Shore hardness tus nqi nce, qhov hardness (stiffness) ntawm cov khoom kho tau nce thiab qhov yooj yim txo.
Rau cov pob txha nquag, qhov loj thiab cov yam ntxwv ntawm lub sealant reservoir yog ib qho tseem ceeb raws li kev xaiv cov sealant haum uas tuaj yeem hloov mus rau qhov kev xav tau ntawm lub pob tawg yav tom ntej. Daim ntawv zoo yog qhov sib piv ntawm cov sealant reservoir. Feem ntau hais lus, rau cov sealants hloov tau, cov ntawv pom zoo yog 1: 2 (0.5) thiab 1: 1 (1.0) (saib daim duab 2). Kev txo qis hauv daim ntawv (los ntawm kev nce qhov dav txheeb ze rau qhov tob) yuav txo cov sealant strain tshwm sim los ntawm kev tawg qhov dav. Yog tias qhov siab tshaj plaws sealant strain txo qis, qhov kev loj hlob ntawm qhov tawg uas lub sealant tuaj yeem tiv taus nce ntxiv. Kev siv daim ntawv pom zoo los ntawm cov chaw tsim khoom yuav ua kom lub siab tshaj plaws elongation ntawm sealant yam tsis ua haujlwm. Yog tias xav tau, teeb tsa cov pas nrig txhawb nqa kom txwv qhov tob ntawm lub sealant thiab pab tsim cov "hourglass" elongated zoo.
Qhov tso cai elongation ntawm lub sealant txo nrog qhov nce ntawm qhov zoo tshaj plaws. Rau 6 nti. Cov phaj tuab nrog tag nrho qhov tob ntawm 0.020 ntiv tes. Qhov zoo tshaj plaws ntawm lub pob txha pob txha tsis muaj qhov sib khi yog 300 (6.0 nti / 0.020 nti = 300). Qhov no piav qhia vim li cas cov kab nrib pleb ntim nrog lub sealant hloov tau yam tsis muaj lub tank sealant feem ntau ua tsis tiav. Yog tias tsis muaj cov dej ntim dej, yog tias muaj kev tawg tawg tshwm sim, cov kab mob yuav nrawm dua lub peev xwm tensile ntawm lub sealant. Rau cov kab nrib pleb nquag, ib txwm siv lub sealant reservoir nrog daim ntawv pom zoo los ntawm cov chaw tsim khoom sealant.
Daim duab 2. Kev nce qhov dav mus rau qhov tob yuav ua rau lub sealant muaj peev xwm tiv taus lub sijhawm tawg tom ntej. Siv ib daim ntawv ntawm 1: 2 (0.5) mus rau 1: 1 (1.0) los yog raws li kev pom zoo los ntawm cov chaw tsim khoom sealant rau cov kab nrib pleb kom ntseeg tau tias cov khoom tuaj yeem ncab kom zoo raws li qhov tawg dav loj hlob yav tom ntej. Kim Basham
Epoxy resin txhaj tshuaj bonds los yog welds tawg raws li nqaim li 0.002 ntiv tes ua ke thiab rov ua kom muaj kev ncaj ncees ntawm cov pob zeb, nrog rau lub zog thiab rigidity. Txoj kev no suav nrog kev siv lub hau npog ntawm cov khoom tsis-sagging epoxy resin txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau nws nws
Lub zog tensile ntawm epoxy resin tshaj 5,000 psi. Vim li no, epoxy resin txhaj tshuaj yog suav tias yog kev kho cov qauv. Txawm li cas los xij, epoxy resin txhaj tshuaj yuav tsis rov tsim kho lub zog tsim, thiab nws yuav tsis ntxiv dag zog rau cov pob zeb uas tau tawg vim kev tsim lossis kev tsim kho yuam kev. Epoxy resin tsis tshua muaj siv los txhaj cov kab nrib pleb los daws cov teeb meem cuam tshuam txog kev muaj peev xwm thauj khoom thiab cov teeb meem kev nyab xeeb ntawm cov qauv.
Yees duab 4. Ua ntej txhaj tshuaj epoxy resin, qhov tawg yuav tsum tau them nrog cov tsis-sagging epoxy resin kom txwv cov epoxy resin pressurized. Tom qab txhaj tshuaj, lub hau epoxy raug tshem tawm los ntawm kev sib tsoo. Feem ntau, tshem tawm lub hau yuav ua rau muaj kev puas tsuaj ntawm cov pob zeb. Kim Basham
Epoxy resin txhaj tshuaj yog ib qho nyuaj, kho qhov tob, thiab cov kab nrib pleb yog muaj zog dua li cov pob zeb uas nyob ib sab. Yog hais tias cov kab nrib pleb los yog cov kab nrib pleb ua raws li qhov shrinkage lossis expansion pob qij txha raug txhaj, lwm cov kab nrib pleb yuav tsum tau tsim ib sab los yog deb ntawm cov kab nrib pleb. Tsuas yog txhaj cov kab nrib pleb lossis cov kab nrib pleb uas muaj cov kab nrib pleb txaus kom dhau los ntawm cov kab nrib pleb kom txwv tsis pub txav mus tom ntej. Cov lus hauv qab no qhia txog cov kev xaiv tseem ceeb ntawm kev kho qhov kev xaiv no thiab lwm yam kev xaiv kho.
Polyurethane resin tuaj yeem siv los kaw cov ntub dej thiab cov kab nrib pleb kom nqaim li 0.002 ntiv tes. Qhov kev kho kho no yog siv los tiv thaiv cov dej ntws tawm, suav nrog kev txhaj tshuaj reactive rau hauv qhov tawg, uas ua ke nrog dej los tsim cov gel o, ntsaws cov xau thiab kaw qhov tawg (duab 5). Cov resins no yuav caum dej thiab nkag mus rau hauv cov micro-cracks nruj thiab qhov hws ntawm cov pob zeb ua kom muaj kev sib raug zoo nrog cov pob zeb ntub dej. Tsis tas li ntawd, cov polyurethane kho tau yooj yim thiab tuaj yeem tiv taus lub zog tawg yav tom ntej. Qhov kev xaiv kho no yog kho kom ruaj khov, haum rau cov kab nrib pleb lossis cov kab nrib pleb dormant.
Yees duab 5. Kev txhaj tshuaj polyurethane suav nrog kev drilling, kev teeb tsa ntawm cov chaw nres nkoj thiab kev txhaj tshuaj siab ntawm cov resin. Cov resin reacts nrog cov dej noo nyob rau hauv cov pob zeb ua kom ruaj khov thiab hloov tau yooj yim ua npuas ncauj, sealing tawg, thiab txawm tawg tawg. Kim Basham
Rau cov kab nrib pleb nrog qhov siab tshaj plaws ntawm 0.004 nti thiab 0.008 nti, qhov no yog txheej txheem ntawm kev kho qhov tawg ntawm qhov muaj dej noo. Cov txheej txheem kho yog vim tias cov cement uas tsis muaj dej tsis muaj dej tau raug rau cov dej noo thiab tsim cov calcium hydroxide uas tsis muaj kuab lom los ntawm cov cement slurry rau saum npoo thiab ua rau cov pa roj carbon dioxide nyob rau hauv ib puag ncig huab cua los tsim calcium carbonate ntawm qhov tawg. 0.004 hli. Tom qab ob peb hnub, qhov tawg dav tuaj yeem kho tau, 0.008 ntiv tes. Cov kab nrib pleb tuaj yeem kho tsis pub dhau ob peb lub lis piam. Yog tias qhov tawg tau cuam tshuam los ntawm cov dej ntws nrawm thiab txav mus los, kev kho yuav tsis tshwm sim.
Qee zaum "tsis muaj kev kho" yog qhov kev kho zoo tshaj plaws. Tsis yog txhua qhov tawg yuav tsum tau kho, thiab kev saib xyuas cov kab nrib pleb yuav yog qhov kev xaiv zoo tshaj plaws. Yog tias tsim nyog, cov kab nrib pleb tuaj yeem kho tom qab.
Post lub sij hawm: Sep-03-2021