P: 1. Tn gi: - Xi mng PC40 l xi mng Portland (Portland Cement), c tn gi khc l OPC (Ordinary. Portland Cement) - Xi mng PCB40 l xi mng Portland hn hp (Portland Cement Blended). 2. Thnh phn: S khc nhau cn bn v thnh phn gia hai lai xi mng ni trn l xi mng. PCB40 c mt lng kh cao ph gia hot tnh thy lc nh puzzoland, vi, xngoi 2.
Nn xi mng, tng gch 20cm, mi fir xi mng, ca st. - Hin trng Ti thi im thm nh, nn b ln cc b, tng b nt, thm nc nhiu v tr, cng trnh b xung cp.: Mng b ln cc b, nn vnh, tng nghing v rn nt cc b.: C nhiu vt nt ln, chy di v su mt na b dy tng. Va trt, sn nc c du hiu xung cp, bay mu
Nhm xi mng Silc. Nhm xi mng Alumin. Nhm xi mng khc. TNG QUAN V XIMNG. Xi mng Portland : Xi mng Portland thuc nhm xi mng Silic l loi vt liu c s dng ph bin nht trn ton th gii, n. l thnh phn c bn ca b tng, va, h. C thnh phn ch yu l clinker Portland chim t l 95 - 97% v thch cao chim t l 3-5%. Ngoi ra ngi ta c th thm cc. cht ph khc vo thnh phn ca xi ...