Post Date: 27 Jun, 2022
4. Retarder
Maretarders akakamurwa kuita organic retarders uye inorganic retarders. Mazhinji ezve organic retarders ane mvura yekudzikisa mhedzisiro, saka ivo vanonzi zvakare vanodzosa uye vanoderedza mvura. Parizvino, isu tinowanzo shandisa organic retarders. Organic retarders inonyanya kudzikisa hydration yeC3A, uye lignosulfonates inogonawo kunonoka kuyerera kweC4AF. Kuumbwa kwakasiyana kwe lignosulfonates kunogona kuratidza zvimiro zvakasiyana uye dzimwe nguva kukonzeresa kuseta simende.
Matambudziko anotevera anofanirwa kutariswa kana uchishandisa retarder mune yekutengesa kongiri:
A. Chenjerera kuenderana necementitious material system uye mamwe makemikari admixtures.
B. Teerera kune kuchinja kwemamiriro ekushisa
C. Chenjerera kufambira mberi kwekuvaka uye chinhambwe chekufambisa
D. Chenjerera kune zvinodiwa zvepurojekiti
E. Kuchenjerera kunofanira kubhadharwa pakusimbisa kuchengetedza apo
Matambudziko anotevera anofanirwa kutariswa kana uchishandisa retarder mune yekutengesa kongiri:
A. Chenjerera kuenderana necementitious material system uye mamwe makemikari admixtures.
B. Teerera kune kuchinja kwemamiriro ekushisa
C. Chenjerera kufambira mberi kwekuvaka uye chinhambwe chekufambisa
D. Chenjerera kune zvinodiwa zvepurojekiti
E. Kuchenjerera kunofanira kubhadharwa pakusimbisa kuchengetedza apo
Sodium sulfate ipfu chena, uye muyero wakakodzera ndeye 0.5% kusvika 2.0%; iyo yekutanga simba mhedzisiro haina kunaka seyeCaCl2. Iyo yekutanga simba mhedzisiro ye slag simende kongiri inonyanya kukosha, asi iyo yekupedzisira simba inodzikira zvishoma. Muyero we sodium sulfate yekutanga-simba mumiriri mune prestressed kongiri zvimiro haifaniri kudarika 1%; muyero wezvakasimbiswa kongiri zvimiro munzvimbo dzine hunyoro hazvipfuuri 1.5%; iyo yakawanda dosage ichave yakanyatso kudzorwa.
Deterioration; "hoarfrost" pamusoro pekongiri, inokanganisa chitarisiko uye kupera. Uye zvakare, sodium sulfate yekutanga simba mumiriri haizoshandiswe mumapurojekiti anotevera:
a. Zvivako zvinosangana nesimbi yakakoshwa kana simbi yealuminium uye zvimiro zvine simbi yakavhurwa yakamisikidzwa zvikamu pasina matanho ekudzivirira.
b. Yakasimbiswa kongiri zvimiro zvemafekitori uye magetsi ekufambisa zvivakwa achishandisa DC simba.
c. Concrete zvimiro zvine reactive aggregates.
Nguva yekutumira: Jun-27-2022
