Pa nrho cov tshuab txhaj tshuaj tawg tawg tuaj yeem tiv thaiv tus choj lawj kab nrib pleb. Ua ntej waterproofing tus choj lawj, cov qhob nto yuav tsum tau ua ntej-} kho. Cov txheej txheem no feem ntau ua tau siv txoj kev pua tuag tua blasting tshuab. Tom qab ua tiav, yog tias tawg loj tsim ntawm tus choj lawj vim cov khoom siv tsim kho tsis zoo, siv cov khoom siv tawg ua kom tau siv los pab kho. Tus txheej txheem no yog maj mam muab rau cov pob zeb ua thiab, muab piv rau cov kab nrib pleb, tuaj yeem tiv thaiv cov kab nrib pleb thiab tiv thaiv tus choj lawj los ntawm kev cuam tshuam mecharical tshuab. Peb saib ntawm hom ntawm choj lawj tawg puas.
1. Microcack Akis (daim ntawv pib)
Cov yam ntxwv: spot - zoo li lossis luv tawg, feem ntau tsawg dua 0.2mm dav.
Kev Tsim Kho Hluav Taws Xob:
Tsis txaus -} kub cuv tsis taus ntawm asphalt sib tov (kev pheej hmoo nce zuj zus lossis sib npaug nrog 50%)
Rov ua dua kev ntxhov siab tshwm sim los ntawm cov choj choj tsis sib xws (feem ntau yuav tshwm sim ntawm kev co zaus ntawm 5-15Hz)
DEJ SUPACE LASTIVE QUA khov -}}}}}}} Kev puas tsuaj yog qhov tseem ceeb thaum kev nqus dej> 0.5%)
2. Tawm cov kab nrib pleb (daim ntawv txhim kho)
Spatial faib:
Longitudinal tawg: feem ntau tshwm sim nyob rau hauv nruab nrab -} span cheeb tsam ntawm txuas ntxiv nqaj hlau (Deflections> L / 500)
Transverse Cracks: Ntau yam ze ntawm cov kev txhawb nqa ntawm tsuas yog txhawb cov choj nqaj (shear nyuaj siab concentration cheeb tsam)
Deterioration mechanism:
Qhov kev ntxhov siab convor ntawm cov taub qab tawg tuaj yeem ncav cuag 2.5-3.0.
Kev Loj Hlob Xyoo: kwv yees li 1-3 hli / xyoo (hauv cov tsheb khiav hnyav)
3. Network Cov Khaub Ncaws (Daim Ntawv Compound)
Cov Qauv Txheej Txheem:
Cov kab nrib pleb spaced 20-50 cm sib nrug, ua daim phiaj.
Kev hle khaub ncaws yuav tshwm sim ntawm kev sib tshuam (tev lub zog poob qis dua 0.3 MPa).
Cov qib kev puas tsuaj:
Dej permeability nce los ntawm ntau dua 300%.
Rhuav kom deb zuj zus los ntawm 15-20% (thaum sib txhuam coefficient yog<0.45).
4. Cracking (Daim Ntawv Tshwj Xeeb)
Qhia meej Maas Qhob tsis xws luag:
Ntaj shrinkage: 3-5 hli sib sib zog nqus, tawg plhuav 5-10 cm (tshwm sim los ntawm kev kho tsis raug).
Alkali-Aggregate Reaction: Cracks are distributed radially (occur when ASR expansion ratio is >0.1%).
Warping: Qhov ntau kawg Arching tuaj yeem ncav cuag 10-15 hli / m.
