The utilization of carbide lime for the production of cinder bricks and unfired insulation materials

• Main Authors: Ayson, Chona Corazon, Rivera, Carl Arvin, Santos, Stanley
• Format: text
• Language: English
• Published: Animo Repository 1995
• Subjects: Carbides; Lime; Cinder blocks; Bricks; Building materials; Insulation (Heat); Cement > Additives; Chemical Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/5724
• Institution: De La Salle University

The utilization of carbide lime for cinder bricks and insulation had been the main focus of this study. Evaluation of the insulating capabilities of dried carbide lime and its mix with different materials were conducted by determining their respective thermal conductivities. Two sets of tests were performed - fired and unfired. Fired bricks, using simulated cinder bricks, comprised of carbide lime, volcanic ash and clay as the components. The tests were done in different weight ratios at a temperature of 100 centigrade. For the unfired samples, pure carbide lime and its mixture with rice hulls, saw dust, and volcanic ash (in equal weight ratio, 1:1) were also tested at the same temperature of the fired bricks. Tests showed that the mixture with more amount of clay present (ratio # 2, clay: volc.ash:lime, 2:1) and the carbide lime-rice hulls mixture possess the highest insulating capability. Both mixtures have thermal conductivity coefficients (kl) of 2.41 W centigrade and 3.41 W centigrade, respectively. These results imply that: (a) The above mentioned brick ratio and ratio numbers 1 (1:1:1) and 3 (1:2:1) with kl values of 5.31 W/ centigrade and 5.76 W/ centigrade, respectively, are possible substitutes for the commercially available fireclay. (b) Among the 4 unfired samples (pure carbide lime, carbide lime-saw dust, 1:1 by weight carbide lime-rice hulls, 1:1 carbide lime-volcanic ash, 1:1) none of them would be possible good substitutes for industrially used insulators such as asbestos and poly-urethane foam.