POSSIBLE USES OF BAGASSE ASH AS AN ALTERNATIVE CEMENT
POSSIBLE USES OF BAGASSE ASH AS AN ALTERNATIVE CEMENT
| dc.contributor.author | DANIEL, OGBONYOMI TADE | |
| dc.date.accessioned | 2015-01-16T09:38:39Z | |
| dc.date.available | 2015-01-16T09:38:39Z | |
| dc.date.issued | 1998-10 | |
| dc.description | A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL, AHMADU BELLO UNIVERSITY, ZARIA, IN "PARTIAL" FULFILLMENT OF THE AWARD OF MASTER OF SCIENCE DEGREE IN STRUCTURAL ENGINEERING. DEPARTMENT OF CIVIL ENGINEERING AHMADU BELLO UNIVERSITY ZARIA. OCTOBER, 1998 | en_US |
| dc.description.abstract | This study is an i n v e s t i g a t i o n i n t o the p o s s i b l e use of bagasse ash, SCBA, as an a l t e r n a t i v e cementing m a t e r i a l . The SCBA was used in c o n j u n c t i o n with lime ( i . e . as a pozzolana) to produce lime-pozzolana cement, and with o r d i n a r y p o r t l a nd cement, OPC (as a p a r t i a l replacement) to produce blended p o z z o l a n i c cement. Bagasse is the fibrous r e s i d u e of sugar cane a f t er c r u s h i n g and e x t r a c t i o n of j u i c e . SCBA is the r e s u l t i n g waste product o b t a i n e d from the combustion of b a g a s s e . The SCBA was o b t a i n e d by burning bagasse in a furnace at a temperature of 400°c. p r e l i m i n a r y i n v e s t i g a t i o n was i n i t i a t e d to a s c e r t a i n the composition and p r o p e r t i e s of the SCBA. A desk, top chemical i n v e s t i g a t i o n c a r r i e d out on the SCBA, revealed the presence of s i l i c a (SiO2 ) in a l a r g e amount (about 58.65%). The combined r a t i o of s i l i c a , alumina and f e r r o u s oxide was determined as 70.86%, i n d i c a t i v e of a good pozzolana. The r e a c t i v i t y of the SCBA was measured through i t s pozzolanic a c t i v i t y index (PAI). The PAI with cement and with lime were found to be 91% and 4.88Mpa r e s p e c t i v e l y , and these t o g e t h e r suggest a r e a c t i ve pozzolana. T r i a l compressive s t r e n g t h t e s t s were c a r r i e d out on v a r i o us mixes of the 5CBA with lime and OPC to produce masonry u n i ts of c o n s t a n t cement - sand r a t i o of 113. The r e s u l t s of the i n i t i a l t e s t s , revealed the b e s t performances of lime - SCBA as 25 175, and OPC-SCBA as 75:25 m i x t u r e s . These r e s u l t s were f u r t h e r s u b s t a n t i a t e d with compressive s t r e n g t h t e s t s c a r r i ed vi out on a population of 86 test specimens. The lime - SCBA (25:75) mixture was found to have a strength property of 6.27MPa and 7.48MPa at ages of 7 and 28 days respectively. These values clearly meets the requirements of ASTM for non-load bearing masonry u n i t s . For the OPC-SCBA mixes, an optimum evaluation of strength v i s - a - v i s replacement of OPC made, showed that a maximum of 25% replacement can be made without adverse loss in compressive strength value. The compressive strength value was measured as 20.3MPa at 28 days which is 85.98% of result obtained with control test specimens. Generally, increases in the substitution of OPC with SCBA gave progressively lower compressive strength values, in all a t o t a l of 171 test specimens were prepared and tested. A cost evaluation of the prepared units revealed that pozzolanic cements are cheaper than pure OPC. A savings of 13.25% and 15.74% were recorded for the 75:25 (OPC + SCBA) and 25:75 (LIME + SCBA) cement mixtures respectively. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/5838 | |
| dc.language.iso | en | en_US |
| dc.subject | POSSIBLE, | en_US |
| dc.subject | BAGASSE, | en_US |
| dc.subject | ASH, | en_US |
| dc.subject | ALTERNATIVE, | en_US |
| dc.subject | CEMENT. | en_US |
| dc.title | POSSIBLE USES OF BAGASSE ASH AS AN ALTERNATIVE CEMENT | en_US |
| dc.type | Thesis | en_US |