Integrale evaluatie van de deelonderzoeken van het Mammoetproject 738504008

Integrale evaluatie van de deelonderzoeken van het Mammoetproject

[ Interpretation and evaluation of the results of the Mammoet project ]

Versluijs CW, Anthonissen IH, Valentijn E

99 p in Dutch 1990

RIVM Rapport 738504008

Toon Nederlands

English Abstract
This report deals with the interpretation and evaluation of the results obtained from the following subprojects of the total research programme. Sampling and preparation of the primary and secondary raw materials (RIVM). Sampling and preparation of the products made from the primary and secondary raw materials (RIVM). Manufacturing of the products and determination of their physical properties (INTRON). Determination of the particle size and the surface area of the primary and secondary raw materials (RIVM). Chemical analysis of the primary and secondary raw materials (ECN). Characterization of the leaching behaviour of the primary and secondary raw materials (RIVM and TNO). Characterization of the leaching behaviour of the crushed products (TNO). Characterization of the leaching behaviour of the products (ECN). Verification of the practical reliability of the standard leaching test by means of a large scale column leaching test (RIVM). The leaching behaviour of some primary and secondary raw materials used in pilot- scale roadbases (TNO). Development and use of the leaching data base (ECN). The results of the characterization of the leaching properties of primary and secondary raw materials generally show a good reproducibility of the chemical composition as well as of the leaching parameters. The studies have also shown that it is technically feasible to replace primary raw materials partially by secondary materials. In most cases, the technical requirements of the products were met. From the results of the standard leaching tests of granular materials and products it was found that the availibility test can be used as a first screening method for the determination of the leaching behaviour of raw materials and products. The leaching of elements from raw materials and products (primary and secondary) depends strongly on the pH value present in the leaching system. Comparison of the results of the standard leaching test (small scale laboratory test) and the same test carried out in lysimeters (pilot-scale) shows the standard leaching test on laboratory scale to be a reliable test procedure in order to estimate the leaching behaviour in at least the first 100 years. The leaching database, which was developed as part of this project, has demonstrated its usefulness in evaluating and interpreting the results of this study. In addition, it will be a useful tool in the future for mutual comparison of materials as well as for certification of materials.

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