Rice hullash and water hyacinth (eichhornia crassipes) bricks Marites A. Barcebal... [et. al]

Thesis (Bachelor of Science in Civil Engineering) -- University of Rizal System-Morong.

EXECUTIVE SUMMARY: This study aimed to make economical bricks from disposed materials such as Rice Hull Ash and Water Hyacinth. Specifically, it aimed to determine the most effective proportioning of RHA, cement and Sand and to determine the effectiveness of RHA and Water Hyacinth in bricks in terms of dimension and tolerance test, water absorption test, efflorescent test and compressive strength test. The researchers used the experimental and developmental research method as the most appropriate method in studying the effectiveness of the product. The researchers utilized a data record sheet checklist, as the main research instrument to determine the acceptability of the bricks in terms of usefulness, functionality, user-friendly and safety and maintenance which was administered to the respondents. The researchers accomplished the process of making bricks based on the standards of manufactures and analyzed by different type of test. The bricks sample underwent ASTM C67-09, ASTM C67-09 is the standard test methods for sampling and testing bricks and structural clay tile involving Classification and Tolerance Test, Water Absoprtion Test, Effloresent Test and Compressive Strength Test. The following were the findings from the analysis and interpretation of test result obtained: in terms of dimension tolerance test more than half of the sample have the same dimension; in terms of water absorption testm the bricks with 25% RHA was the best mixture; in terms of efflorescent test, the two RHA brick samples have the same value of alkalinity; in terms of compressive strength, the computed highest compressive strength was 1,824 psi which is brick with 25% RHA; and in terms of economic value, the RHA bricks entails lower production compared to the conventional bricks. As to the level of acceptability, the RHA bricks were evaluated by the expert respondents as acceptable. Based on the findings the researchers concluded that Adding RHA to the bricks component decreases the volume of cement and bricks with RHA and Water Hyacinth have higher ultimate compressive strength as the conventional bricks. Bricks with RHA are much economical than conventional bricks. Furthermore, the researchers recommended that it would be better to improve the surface for better safety and maintenance and use sieve number 50 to produce more rice hull ash. Future researchers may conduct a study about using Rice hull charcoal.