SOME ASPECTS OF CEMENT CHEMISTRY REGARDING SELF-COMPACTING CONCRETE(SCC)
The Theological behaviour of SCC during the very first hours of hydration is influenced by the formation of syngenite and ettringite and consequently depends on the alkali- and sulfate content of the liquid phase.The probability of phase formations was determined by thermodynamic calculations.Powdered limestone and fly ash as well acting as nucleation sites for C-S-H.Hence,the early stage of hydration is accelerated and the retarding effect of several superplasticisers is partially compensated.Due to the slow hydration of fly ash of merely 10 ％ after 3 month,for SCC with high fly ash content durability testing procedures should be carried out at later ages than intended for normal concretes.
Jochen Stark Marco Friebert
F.A.Finger-Institute for Building Materials Science(FIB),Germany
国际会议
长沙
英文
237-244
2005-05-26（万方平台首次上网日期，不代表论文的发表时间）