Utilization of abaca fiber as a component material in concrete hollow blocks

The objectives of the study was to determine the quality attributes of the aggregates such as sand and pea gravel as to sieve analysis, moisture content, unit weight/mass determination, specific gravity, and absorption; to determine the compressive strength of the concrete hollow blocks using two different treatments- 1:2:4+0% (without abaca fiber) and 1:1.88:3.76+6% (with abaca fiber) after 14 days curing period; to determine the significant mean difference between the two treatments; and to determine the cost and return analysis. Tests showed that on the 14th day of curing, the CHB samples with abaca fibers attained a compressive strength of 500 psi, the minimum value stipulated in ASTM C129 for hollow non-load bearing concrete masonry unit. It’s not only about the addition of abaca fiber that improved the CHB, but equally significant is the potential of recycling materials for a better environment and the economic impact in communities where abaca industry is active.The difference between the two treatment means is significant material at 5% level. Hence, the CHB with abaca fiber has higher compressive strength than the CHB without abaca fiber. CHB A with a design mix of 1:2:4+0% abaca fiber can produce 55 pcs. Per bag of cement at Php10.00 per block while CHB B with a design mix of 1:1.88:3.76+6% abaca fiber can also produce 55 pcs at Php9.90 per block with a return of investment of 19% for one year.