School Year 2011-2012 A REQUIREMENT FOR SCIENCE IV: PHYSICS “Oyster Shells for Sealants” 1. Introduction Leak are one of houses major problem. It won’t let you sleep when rain is pouring so hard and your roof has holes. Your water bills will be high because your water pipe has a leak. These are just some of the problems we encounter in our houses,Primary cure to this problems are sealants. Oyster isn’t just any seafood its shells has avery useful usage.
Oyster shells has a calcium carbonate and silicate;the shells also contains many other ingredients including Aspartic acid,Glycine,Serine and a whole lot more.
Sealants can also be made out of oyster shells,sealants are viscous material that has little or no flow charecteristics and stay where they are applied or thin and runny so as to allow it to penetrate the substrate by means of capillary reaction. 1. 2 Statement of the Problems and Objectives 1. 2. 1Problems: * How can oyster shells be of help to the home owners who suffer from leakage of pipes and damaged roof? * What characteristics of oyster shells attributes to its capability to transform to a sealant? What is the difference of using commercialized sealants and oyster shell-sealants? * What are the advantages and disadvantages of oyster shell-sealants? 1.
2. 2Objectives: 1. 2. 2. 1 General Objective: The objective of our investigation is to provide a cheaper way to solve leakage at homes or even in the commercial establishments through the use of oyster shell-sealants. 1. 2. 2. 2 Specific Objectives: * Compare the time will it take for the sealants made from oyster shells and commercial ones to dry.
Compare the time it takes for the sealants to dry under the sun and at the room temperature. * Test the effectiveness of oyster shells as an additive in preparing sealants in terms of corrosion, resistance, insolubility and strength. 1. 3 Significance of the Study The importance of the study is to improve shell-made sealants. Its a cheaper solution to home owners for them to know that they can create their own sealants at their very own houses with cheap materials that they can easily buy at the market or what they have at home. . 4 Scope and Limitation The investigation studies about the shells of oyster, on how it can be one of the main ingredient in creating a easy to made sealant. This study provides knowledge to test if oyster made sealants is stronger than commercialized sealants. The investigation will also help home owners on how they can create cheap and affordable sealants that has high quality instead of buying the expensive ones. 1. 5 Review of Related Literature In ancient times, shells were used to build churches.
Shells contain lime that enables to bond together. Calcium Carbonate is responsible for the binding ability. Crassostrea gigas,which is locally known as talaba (oyster) is a bivalve—a molluse that has a shell containing two hinges valves. Oysters are an excellent source of zinc, iron, calcium, selenium as well as Vitamin A and Vitamin B12. Oysters are low in food energy; one dozen raw oysters contain approximately 110 kilocalories (460 kJ). Oysters are considered the healthiest when eaten raw on the half shell.
A sealant may be viscous material that has little or no flow characteristics and stay where they are applied or thin and runny so as to allow it to penetrate the substrate by means of capillary reaction. Since the main objective of a sealant is to seal assemblies and joints, sealants need to have sufficient adhesion to the substrates and resistance to environmental conditions to remain bonded over the required life of the assembly. When sealants are used between substrates having different thermal coefficients of expansion or differing elongation under stress, they need to have adequate flexibility and elongation.
Sealants generally contain inert filler material and are usually formulated with an elastomer to give the required flexibility and elongation. They usually have a paste consistency to allow filling of gaps between substrates. Low shrinkage after application is often required. Many adhesive technologies can be formulated into sealants. 2. Methodology 3. 1 Materials and Equipment * Pulverized oyster shells * Gasoline * Styrofoam * Water * 250 ml. Beaker * Mortar and pestle * Stirring rod * Platform balance * Basin 2. 2 Experimental Procedure . 2. 1 Performing the Experiment 2. 2. 1. 1 The flesh were separated from the shells. 2. 2. 1. 2. 1The shells were then washed and dried under the sun. 2. 2. 1. 2 The shells were pulverized with mortar and pestle. 2. 2. 1. 3 To prepare the Gasoline-Styrofoam mixture; 2. 2. 1. 3. 1 Gasoline was poured in a beaker and Styrofoam was added to make the mixture sticky. 2. 2. 1. 3. 2 The pulverized shells were added to the Gasoline-styrofoam mixture. 2. 2. 1. 4 The sealants was left to dry under the heat of the sun and then at room temperature. . 2. 1. 5 Record the time it took to dry in a table. 2. 2. 2 Testing 2. 2. 2. 1 The sealant made from oyster shells was applied to a metal with hole and then it was used to connect plastic pipes. 2. 2. 2. 2 The commercial sealant was also used in the metal and plastic pipes. 2. 2. 2. 3 To test the sealants’ insolubility,the metal pipes were soaked in a basin filled with water for an hour. 2. 2. 2. 4 To test the sealants’ corrosion resistance, the metal and plastic pipes were subjected to a running water as well.
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