ABSTRACT

Bandola, Sheena Mae B. etal. (April 2016) “CLAY WITH RICE HULL AS MASONRY MATERIAL” College of Engineering, Architecture and Fine Arts, Rawis, Legazpi City, SY 2015-2016)

These days, due to the growing cost of construction materials and its demand, some researchers consider industrial or agricultural wastes to be part of the possible solution not only the the economic but also to the environmental problems. For this idea, it will help improve, advance and meet the qualities that are significant in making a new standardization process of improving the quality of clay with Rice Hull as Masonry Material. The primordial goal and its purpose tries to give new breed processing how to apply the idle clay soil mixed with different percentages of RH as one of the main components.
The researchers went to Tiwi, Albay where abundant clay soil could be found. It is known to be the main source of ceramic products and potteries in the Bicol Region and also in the Philippines. The types of clay were sourced out from the sae place, Putsa, Tiwi, labay. Two types of clay soil were used, the red clay and white clay. The other materials needed like RH was taken in a rice mill which is of good quality. The water which was used was from Aquinas University water supply.
To produce the masonry material, two types of clay soil were used in which 2:1 mixture remained constant. He RH was mixed into the two clay with 75%, 50% and 25% respectively. The three mixtures had three samples for each. The water had different volume in mixtures due to absorption and change in RH content. The instrument used in making the CRH was a (4 in. Width x 16 in. Length x 8 in. Height) concrete hollow block molder. After molding the CRH, the samples undergone the curing process air drying, sun drying and oven drying. Then, the following tests were conducted compressive strength, specific gravity and water absorption capacity test.
With the help of Compression Testing machine and specific Gravity Apparatus the test was finely conducted. The test results showed that the strength of the CRH sample is maximum at 25% with compressive strength of 14.484 N/mm. Also, the lowest waster absorption value is obtained with a value of 20.27%. At this point, adding more to the percentage of rice hull will result to porous and weaker bricks.
The researchers concluded that the CRH could be used as a load bearing material based on the comprehensive strength obtained. In relation with the CHB, which is made a mixture of cement, fine and course aggregates and water, its comprehensive strength is 5.518N/mm only.
Clay with rice hull masonry material and CHB are two different mixtures of material. Each has distinct qualities but will try to substitute each other. Its basic aim to achieve a quality masonry material which is achieved in maximum cost without losing the perspective of safety. The researchers came up with the comparison in different aspects.
The recommendation presented for further studies, that is, test thermal and sound insulation of CRH, the appropriate and exact curing process of the CRH, the proper material to be used for plastering and mortar, and the study on how the reinforcement will be added.