Article Sidebar
Article Details
Issue
Section
Articles
Copyright of the journal's content belongs to Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
The copyright of a submitted article is only transferred to the publishers if and when the article is accepted for publication. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, mechanical, photocopying, recording or otherwise without the prior written permission of the publishers.
The copyright of a submitted article is only transferred to the publishers if and when the article is accepted for publication. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, mechanical, photocopying, recording or otherwise without the prior written permission of the publishers.
Main Article Content
Effect Of Bulk Density Variation On The Compression Strength Of Clay-Sodium Silicate-Bonded Moulding Sand
Abstract
This paper reports a study conducted to assess the influence of variation of bulk density on compression strength of clay-bonded sand. Five sand mixes containing silica sand, sodium silicate gel (1 wt. % to 5 wt. %), potters' clay (2 wt. %), and about 5 wt. % water were produced. Each mix was divided into three portions to which wood flour (2 wt. %) or charcoal (2 wt. %) or their mixture (1 wt % each). was added to first, second and third portion respectively. Each portion was thoroughly mixed and AFS cylindrical
specimens prepared. Thereafter, bulk densities and compression strength of the prepared samples were measured. It was noted that when wood flour, charcoal or their mixture is added, the characteristics of compression strength of clay-bonded sand assume a parabolic form as the bulk density increases. It was inferred that two factors, namely, the number of sand-grain-to-sand-grain contact and the number of pores in the clay-silica gel formed round the surface of sand grains, produce two opposing influences on the compression strength. The compression strength value attains a maximum when these influences are
equalized.
Journal of Science & Technology (Ghana) Vol. 27 (3) 2007: pp. 141-148
