Crushed animal bone as supplementary fine aggregates in concrete hollow blocks / by Miguel C. Balbar, Xhyrylle C. Masiado and Kaye M. Sy.

Research Study (Science High School) Cavite State University.

Includes bibliographical references.

College of Education (CED)

BALBAR, MIGUIEL C., MASIADO, XHYRYLLE C., SY, KAYE M. Crushed Animal
Bone as Supplementary Fine Aggregates in Concrete Hollow Blocks. Research Study
(General Science Curriculum), Laboratory Science High School, College of Education,
Cavite State University, lndang, Cavite. May 2019. Adviser: Engr. Cene M. Bago.
The study entitled "Crushed Animal Bone as Supplementary Fine Aggregates in Concrete
Hollow Blocks" was conducted from August 2018 to February 2019. It aimed to produce
concrete hollow blocks with crushed animal bones used as supplementary fine aggregates in
different proportions. Specifically, the study aimed to: (1) determine the weight of each sample
of hardened concrete hollow blocks after seventh (7) day and twenty-eighth (28) day of curing;
(2) determine the compressive strength of the concrete hollow blocks after the seventh (7) day
and twenty-eighth (28) day of curing; (3) determine the texture of each sample of hardened
concrete hollow blocks after twenty-eighth (28) day of curing; and (4) determine the estimated
cost of producing concrete hollow blocks. The concrete hollow blocks were produced at Kim Lee
Hardware CHB Production Site and were tested at ASTEC Materials Testing Corporation.
The study used four treatments having four replications each with the following
proportions: (1) 100 percent sand- 0 percent crushed cow bones, (2) 80 percent sand- 20
percent crushed cow bones, (3) 60 percent sand- 40 percent crushed cow bones, and (4) 40
percent sand- 60 percent crushed cow bones. The cow bones were gathered from different
restaurants in Tagaytay City. After gathering, they had undergone the process of cleaning,
grilling and crushing. The researchers conducted sieve analysis to check if the particle size of
the crushed bones can already be used for the production of CHB. When the desired amount of
crushed cow bones and other materials were completed, the researchers proceeded to the
production of CHB.
The results of the study showed that that the amount of crushed cow bones did not give a
considerable change in the weight of the samples. It also showed that as the amount of crushed
cow bones increases, the compressive strength of the produced concrete hollow blocks
decreases and as the curing period gets longer, the compressive strength increases. Treatment
2, among all the other treatments with crushed cow bones has the highest compressive strength
of 385 psi which passed the standard strength for non-load-bearing concrete hollow blocks. In
terms of texture, there was no significant change when the amount of crushed cow bones
increased. For the estimated cost, Treatment I got the lowest at Php 56.71 and Treatment 4 got
the highest at Php 280.99. The researchers recommend using another proportion with lesser
amount of crushed cow bones. Future researchers may also devise a way, specifically, a
machine for more efficient process of crushing the bones.

Submitted to the University Library 01/28/2020 RS-859