The Effects of the Trace Elements in Cement on the Environment
By T. Ugajin
Concrete Journal, Vol.39, No.4, Apr. 2001
- Synopsis
- This paper discisses the effects of trace elements in cement, especialy water-soluble hexavalent chromium on environment through investigation and experimentation. In the cases of bleeding water from fresh concrete and the water that washed some tools in construction site, the concentrations of hexavalent chromium occasionally exceed the regulations for waste water. However, popular guards taken to protect construction workers against strong alkalinity originally, are also available to protect them against hexavalent chromium. Concerning the leachability of hexavalent chromium from hardened concrete, there is no result exceeding environmental quality standards for soil pollution. From the experimental results assumed green cut, cocreting under water and pile concreting in site, we found that there is no serious problem that some water contained hexavalent chromium leached from concrete affect environment.
- Keywords:
- trace element, hexavalent chromium, leachability, concrete, environment
