Effective Utilization of Ceramic Powders for Concrete Pavement

Abstract

The effective utilization of industrial wastes has been becoming the urgent problem for the establishment of the recycling society. Especially, there are many kinds of the powders-formed industrial wastes, and studies on the utilization of them have been conducted individually and widely. The powders which do not have activity are often used as a filler of asphalt pavement, but its supply has been already saturated in Japan. Therefore, the methods to use them as the aggregate of concrete pavement is also studied. When the approach method is established, it will help the reduction of the environmental load in the infrastructure development of the field of agriculture. In this study, authors focused on the powder exhausted in the manufacturing process of the ceramic product. This ceramic powder (CP for short) is one of the powders-formed industrial wastes which don't have activity. A process of the abrasion is necessary in the production of the ceramic product. On this occasion, ceramic fines are produced as sludge-formed drainage. Under the present condition, the drainage is dried by the sun and solidified by the addition of cement. It is disposed as the industrial waste in the state, and effective utilization has been expected. In this paper, CP was investigated to be used effectively as the substitute of fine aggregate. A part of JIS standard sand was replaced to CP by volume, being based on the mix proportion in the strength test of cements. The maximum replacing ratio was established experimentally from the viewpoint of fresh properties such as mortar flow test and setting time test and strength properties. The shrinkage properties was also obtained by the test of length change of mortar with dial gauge.