(2) kev vibration tsis raug
(1) Kev vibration tsis ntom, tsis sib xws, honeycomb, pockmarked, hollow, yog lub hauv paus ntawm steel corrosion los yog lwm yam load tawg.
(2) vibration lub sij hawm luv luv, kev co tsis ntom, qhov tsim ntawm pob zeb muaj zog tsis txaus los yog tsis sib xws; Lub sij hawm ntev heev, ua rau stratification, coarse aggregate mus rau hauv qab, nplua aggregate nyob rau hauv lub sab sauv txheej, tsis sib npaug zog, dua li cov pob zeb hauv qab muaj ib tug loj qhuav shrinkage, tom qab dej evaporation, yooj yim rau tsim yas shrinkage tawg.
(3) Kev hloov pauv tsis tau tso cai ntawm cov dej-cement piv rau hauv cov txheej txheem tsim kho
Pumping pob zeb kev tsim kho, kom yooj yim ntawm kev tsim kho, tsis tas yuav ntxiv dej los txhim kho qhov fluidity ntawm cov pob zeb, los yog vim muaj lwm cov laj thawj los ua kom qhov sib piv ntawm cov dej cement, ua rau cov pob zeb hardening shrinkage nce, cov qauv zoo li mesh lossis tsis sib xws ntawm qhov sib txawv ntev. .
