Self-compacting concrete (SCC) is undoubtedly a promising ecological cement matrix composite of new generation. However, it is not easy to achieve the required combination of properties in fresh SCC mixes. SCC is also particularly sensitive to any changes in the laboratory and at the job site. Choice of constituents for SCC, especially cement and superplasticiser which are able to collaborate in the correct way, has a significant effect on SCC performance. In this investigation considered in qualitative way, four cements, varying in physical and chemical properties and phase composition were used to check their compatibility with a new generation superplasticiser, taking into account the properties of fresh and hardened self-compacting concretes. Results revealed some differences although it is impossible to answer definitely which cement performs with the superplasticiser in the best way.
The ISO 22000 standard is a relatively new approach to the EU markets. Nowadays popularity of that system is rising among food sector companies. It unifies the requirements concerning food production. Its subject of interest and structure are very similar to the ISO 9001 standard. This article discusses if the above standards are complementing each other or if they are simply interchangeable.
The compatibility of the species forming the fluke-snail complex is biochemical in nature. Trematode larvae are capable of modulating the immunologlcal response of the host, while snails are capable of secreting substances affecting the mobility of the parasite's invasive stages.