Fine particulate by-products from mineral and metallurgical industries as filler in cement-based materials

The mineral and metallurgical industries produces large amounts of by- products, these materials may be used as filler in concrete. However, before they can be used as filler in concrete their effect on concrete properties, such as strength, cement hydration and rheology has to be evaluated. A test procedure consisting of easy and reliable experimental methods has been developed. Fine particulate by-products have been collected and tested in order to evaluate their effect on concrete properties. Since these materials may contain metal oxides, some experiments have been conducted to estimate the effect of some common metal oxides on cement hydration. When evaluating by-products suitability it is important to obtain more knowledge of the effect of certain physical properties. Limestone fillers with different particle size distribution and origin were characterised and their effect on rheology investigated. To facilitate the use of by-products as filler materials a quality controll method, PaRMAC, was investigated. The developed test method's validity concerning strength, rate of reaction and heat development for one material was first examined in laboratory scale and thenereafter in a full scale experiment. The conclusion of this study is that it is possible to use by-products as filler material in concrete.Godkänd; 2003; 20061106 (haneit

Fine particulate by-products from mineral and metallurgical industries as filler in cement-based materials

The mineral and metallurgical industries produces large amounts of by- products, these materials may be used as filler in concrete. However, before they can be used as filler in concrete their effect on concrete properties, such as strength, cement hydration and rheology has to be evaluated. A test procedure consisting of easy and reliable experimental methods has been developed. Fine particulate by-products have been collected and tested in order to evaluate their effect on concrete properties. Since these materials may contain metal oxides, some experiments have been conducted to estimate the effect of some common metal oxides on cement hydration. When evaluating by-products suitability it is important to obtain more knowledge of the effect of certain physical properties. Limestone fillers with different particle size distribution and origin were characterised and their effect on rheology investigated. To facilitate the use of by-products as filler materials a quality controll method, PaRMAC, was investigated. The developed test method's validity concerning strength, rate of reaction and heat development for one material was first examined in laboratory scale and thenereafter in a full scale experiment. The conclusion of this study is that it is possible to use by-products as filler material in concrete.Godkänd; 2003; 20061106 (haneit

The use of by-products from metallurgical and mineral industries as filler in cement-based materials

This investigation has been made in order to make it possible to increase the use of by-products in cement-based materials. Use of by-products requires a screening procedure that will reliably determine their impact on concrete. A test procedure was developed. The most important properties were considered to be strength development, shrinkage, expansion and workability. The methods used were calorimetry, flow table tests, F-shape measurements, measurements of compressive and flexural strength and shrinkage/expansion measurements. Scanning electron microscopy was used to verify some results. Twelve byproducts were collected from Swedish metallurgical and mineral industries and classified according to the test procedure. The investigation showed that the test procedure clearly screened out the materials that can be used in the production of concrete from the unsuitable ones.Validerad; 2003; 20070112 (pafi