LIGHTWEIGHT CONCRETE MAKING ANALYSIS USING MIXED CELLULOSE

Development era of globalization has resulted in increasing number of second-hand goods / waste that its existence can be a problem for life in the future. Many things are done in order to recycle paper cement in order to overcome this problem the existence of waste. One way is to use waste paper to be a part of the building. The purpose of this study, to determine the compressive strength and optimum density. Laboratory experimental method uses a variation of 10%, 20%, 30% and testing conducted in the form of compressive strength and density. From the test results obtained by the result of decrease in the compressive strength and density. In addition cellulose concrete mix design with variations determined that 10%, 20%, 30% resulted in a decrease in the compressive strength of concrete,


INTRODUCTION
Utilization of cellulose paper as the raw material of concrete is one alternative that can be applied to overcome the natural pollution caused by waste paper. One of the manufacture of lightweight concrete is to mensubtitusikan normal aggregate into lightweight aggregates. In this study the normal coarse aggregate is substituted with an aggregate made from waste paper cellulose. In the science of building materials there are several types of materials that are categorized as filler in concrete, such as gravel, cement, cellulose and other filler materials (Moerdwiyono 1997in Andoyo, 2006. The addition of cellulose paper material to produce optimum power in normal concrete of compressive strength, tensile strength, and the ability to reduce noise (Eniarti, M., 2010). In addition to the extra material of paper, material foaming agent is expected to create a cavity in the normal concrete when the concrete is mixed so that volume can expand and lighten its weight. This research if it can be developed continuously, it can be mass produced and readily available. Foaming agent was chosen as the added material are easily available and easy to be processed en masse later.

Headings tables and figures
Paper processing cement (Cellulose) as aggregates, namely, first soak the cement paper approximately 3 months until into pulp. The materials used include the following, which is already in the cement paper process into pulp, which is derived from Lumajang sand, gravel with a size of 10 mm, the added material Foam Aggent and concrete drug brand "ADDITON" type 5 m.
Planning a concrete mixture with a proportion of Trial and Error experimental method with the results as a reference for normal concrete is developed into concrete innovation Preparation of test specimens made as many as 24 pieces in the form of cylinders, each made with four variations of the test specimen and six specimen at each variation. The test object in the form of a cylinder having a diameter of 15 cm and 30 cm high.
In the mixing stage, coarse aggregate, fine aggregate evenly mixed, prepare the appropriate water mix design and split half the dose to be mixed with Aggent Foam, Foam Aggent stir until foamy and ready for use. Mix the dough mixture of aggregate with the additon of 5 M stir after it was input Aggent Foam mix, stirring until smooth and ready digunakan.Setelah concrete slump testing was done. In the treatment phase of the test object.
Compressive strength testing performed on the test specimen aged 7, 14 and 28 days, after the drying process of care test object. Tests conducted in the laboratory compressive strength of concrete Mektan and Civil Engineering University Narotama.

Equations, formulas and code
Testing of fine and coarse aggregates include moisture, density, volume weight, hygiene, sieving, as the following table; In testing the compressive strength, compressive strength is obtained as follows;

Kuat Tekan 1 Column1
The results of the testing of compressive strength and unit weight of the concrete can be seen in the following table: Graph 2. the relationship between the compressive strength and density Based on the chart 2 shows that the composition of the material that was done the appropriate mix design, namely cement, Lumajang sand, gravel, foarm agent, water, and adding 5M Cellulose Addition on MixDesign quality Concrete K.200, with the same quality mix design, there are two variations, namely normal concrete and concrete using cellulose in addition cellulose concrete mix design with variations determined that 10%, 20%, 30% can be concluded that the mix design KC.1 (concrete with a mixture of cellulose 10%) who have a compressive strength with density the ideal is cellulose 10% with a value of 0095, while the low value that is concrete mix design with cellulose KC.3 30% by 0059 and by 0085 concrete K200 nomal.

Footnotes and acknowledgements
On the results of research and discussion that has been done can be some conclusions as follows: 1. Effect of waste paper as a fine aggregate cement concrete is made to be mild but when its use becomes excessive eating compressive strength drop or lower.
2. Cylinder compressive strength testing results have shown that the material composition mix design is done in accordance cellulose, additon 5M, foam agent makes the compressive strength and density of concrete to be mild. The more the composition of the cellulose material mixing light concrete influence on the strength of concrete in the concrete age of 28 days in lightweight concrete (KC3) compressive strength of 115kg / cm2 decreased 10% compressive strength of normal concrete compressive strength of 212kg / cm2 3. Compressive Strength average of the highest concrete with a concrete mixture sellulose achieved by the composition of the additon of 5M 2.5% of cement, foam Agent 1% of cement, sellulose 10% of sand of 213 kg / cm2. 4. On Early Stage to aggregate and material preparation plan should be ensured to be clean from mud and placed in a safe place until the aggregate and the material is ready for use 5. For Paper Material Fine Aggregate Cement lieu though preferably should be in advance and note the water level because the paper must be wet cement should not contain a lot of water For Lightweight Concrete Curing Treatment cellulose composition should not be put into a water / soaked due to the drying process takes a long time. 6. Based on the above conclusions after conducting research and to test the concrete compressive test, there was a decrease in the average compressive strength of the concrete with the addition of 5M 2.5% foam agent 4% to 30% of cement sellulose this happens is because if the addition of 2.5% foam agent addition 4% sellulose 30% too many numbers are not good also for the quality of concrete in achieving the targets. 7. And also there should be studies further research on the concrete with a mixture of addition of 5M, foam agent, sellulose with a different composition and calculation mix disegn another although in this study can already be known to the compressive strength of concrete the most optimum of some mix disegn in order to determine the composition a mixture of 5M addition, foam agent, sellulose more precise in the manufacture of high quality concrete. In order to obtain maximum results and time can also be accepted in a concrete industry according to SNI (Indonesian National Standard)