Browse

Metakaoline is a relatively new pozzolanic additive, obtained by calcination of kaolin clay at relatively low temperatures. Themselves pozzolanic additives are known for a very long time. Currently, there is interest to pozzolanic materials again, because their usage allows reducing the total environmental impact and cost of cement. The influence of metakaoline on hydration and hardening of cement was studied. The usage of metakaoline as the additive to cement composition increases the strength of cement stone. Be...

Concrete structures exposed to water pressure, such as underground basements, water retaining structures and tunnels, have to be designed as watertight in order to prevent damage due to moisture or water ingress. The design and execution of watertight concrete structures is regulated by guidelines, nevertheless, after execution they may suffer from various failures. The most frequent failure is leakage of ground water through cracks. Major steps in the design process of watertight concrete structures are summarize...