ANALYSIS OF THE EFFECT USING RECYCLE AGGREGATE COARSE AND SILICA FUME OF COMPRESSIVE STRENGTH ON CONCRETE* Andika Sari Putri

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1 ANALYSIS OF THE EFFECT USING RECYCLE AGGREGATE COARSE AND SILICA FUME OF COMPRESSIVE STRENGTH ON CONCRETE* Andika Sari Putri Binus University, Jl. KH. Syahdan No. 9 Kemanggisan Jakarta Barat, , putri.salsa55@gmail.com Andika Sari Putri, Irpan Hidayat ABSTRACT The use of substitute materials as ingredients in the manufacture of concrete is growing. The material used is also more varied, depending on the expected results. This study aimed to compare the compressive strength of the concrete using recycled waste concrete samples with a percentage of 50%, 5%, and 100% as coarse aggregate replacement material and the addition of silica fume as an additive to the strength of the recycled concrete. The research method is to design a concrete mixture composition for each sample of concrete waste content and then produce a cylindrical concrete samples will then be tested and comparing the respective strengths of concrete compositions produced. Based on the test results obtained by the data of compressive strength of concrete cylinder that shows the quality of the entire sample of concrete in terms of the ability to withstand the compressive force, concluded that the use of substitutes waste concrete sample and the addition of silica fume at a certain percentage has not been able to increase the compressive strength of concrete well. Keywords: Substitute Materials, Waste Samples Concrete, Concrete Recycling, Strong Press. PREFACE Concrete is a major component in a structure that serves as an advocate for the load, because there are still a lot of building infrastructure are still using concrete as the main structure for example roads, buildings, and bridges. Concrete can withstand high compressive force, but not good enough to withstand the force of attraction. Because the main function, then any planning in designing a structure need to know or define the quality of the concrete to be used. Concrete recycling (recycled concrete) is a mixture obtained from reprocessing of material previously. Some differences in quality, physical properties and chemical recycled aggregate, causing differences in the properties (properties) generated concrete material, such as decreasing compressive strength, tensile strength, and modulus of elasticity. When this has been much research done on the use of other materials, especially solid waste material that can be used as a substitute for concrete forming. One of them is the use of concrete waste as a substitute for natural aggregate from the rest of the demolition of the building, the rest of the building burned, the rest of the buildings affected by the earthquake and the rest of ready-mix concrete (readymix) called waste concrete samples. Waste concrete sample has a unique nature that required fairly extensive knowledge of the basic material properties, especially the basic material properties of waste concrete samples. Waste concrete sample has a different nature with natural aggregate so that these differences lead to differences in the nature of the resulting concrete. In this study, researchers tried to apply the normal concrete into recycled concrete aggregate substitute namely by providing samples of waste concrete and silica fume. Waste concrete is concrete samples that are not used anymore are solved with size adjusted so that the waste can replace the concrete sample coarse aggregate. Silica fume is an additive which can help the concrete strength is high and long-lasting. Thus the need for research on the effects of using waste as a substitute for coarse aggregate concrete and silica fume as additional additives. RESEARCH METHOD Here is a chart of the flow of the research plan is divided into multiple resistant, can be seen in the following figure : *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

2 The research method is a sequence of steps that will be implemented in accordance with research on Analysis of Effect of Using Recycled Coarse Aggregates and Silica Fume Against Concrete Compressive Strength. In the first stage will be the study of literature in order to learn the basics of the theory relating to research to be carried out and considering the kind of research that has been done as a reference in conducting research. Furthermore, the determination of the method in designing the concrete mix adapted to the constraints that have been discussed in previous chapters. Next to the completion of this study, conducted experiments in the laboratory so that later obtained the data needed to be processed and analyzed. And at the final stage made the conclusion of the study presented in the final report. Picture 1 Diagram Alir Penelitian RESULTS AND DISCUSSIONS Concrete Compressive Strength Testing Results Analysis Value Compressive Strength Concrete with Waste Concrete In the last stage of research is testing the strength of concrete at the age of and days. Results of testing compressive strength of concrete in this study are as follows : Table 1 Results of Concrete Compressive Strength Testing *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

3 0% 50% 5% 100% (hari) (kg) (kg) 12, , ,13 12, , , , , , ,29 12, , , , , , ,65 11, , , , , , ,60 11, , , , , , ,0 11, , , , , , ,61 11, , , , , , ,0 12, , , , , , ,68 12, , , ,20453 Cource : Results of Laboratory Tests 21,326 3,19 15,50 19,62 14,343 19,250 13,399 1,14 *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

4 Figure 1 Graph Analysis of Concrete Compressive Strength Without Silica Fume ( Cylindrical Shaped Test Objects ) Based on Figure 1, it is known that normal concrete with a mixture of 0% waste concrete has a compressive strength higher at 3.19 MPa at days compared with recycled concrete with a mixture of waste concrete 50% who have a compressive strength MPa at days. While on the other variations of the mixture of waste concrete is known that the mixing of waste concrete from the 50% it will reduce the ability of concrete to carry the compressive force. Based on research Wihardi Tjaronge, Abd. Madjid Akkas, and Andi Sri Ulvah in 2012, the waste mix concrete with a variation of 50% has a compressive strength of 1.4 MPa and with a variety of 100% has a compressive strength of 1.14 MPa. In this study, the compressive strength of the resulting value is greater than previous studies, because this study used agregar finer size than previous studies that use a more coarse aggregate, it will generate a different parameter values of each size. This can affect the compressive strength is generated. Analysis Value Compressive Strength Concrete with Waste Concrete 50% and Silica Fume In this study is testing the compressive strength of concrete with concrete waste 50% instead of coarse aggregate with the use of silica fume composition 6%, 9%, and 12% at the age of and days. Results of testing compressive strength of concrete in this study are as follows: Table 2 Value Compressive Strength Concrete (Waste 50% and Silica Fume) 50% Silica Fume 6% 9% 12% (hari) (kg) (kg) 12, ,323 12,60 12, ,985 12, ,852 12, ,11 12,50 12, ,9 12, ,249 11, ,11 11,50 11, ,852 11, ,985 11, ,11 11,25 11, ,948 11, ,9 11, ,985 11,50 11, ,6 11, ,11 12, ,551 11,0 11, ,985 11, ,985 14,20 19,22 16,985 20,8 16,96 1,14 *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

5 Figure 2 Graph Compressive Strength Using Waste 50 % and Silica Fume ( Cylindrical Shaped Test Objects ) Based on Figure 2, it was concluded that the use of silica fume with a composition of 9 % can improve the compressive strength higher at 20.8 Mpa at days compared to the use of silica fume with other compositions. Analysis Value Compressive Strength Concrete with Waste Concrete 5 % and Silica Fume In this study is testing the compressive strength of concrete with concrete waste 5 % instead of coarse aggregate with the use of silica fume composition 6 %, 9 %, and 12 % at the age of and days. Results of testing compressive strength of concrete in this study are as follows : Table 3 Value Compressive Strength Concrete ( Waste 5 % and Silica Fume ) 5% Silica Fume 6% 9% (hari) (kg) (kg) 12% 12, ,6 11,5 12, ,43 11, ,852 12, ,514 12,00 12, ,985 12, ,6 11, ,815 11,0 11, ,11 11, ,154 11, ,815 11,60 11, ,948 11, ,532 11, ,646 11,00 11, ,551 15,192 1,929 1,363 20,099 1,14 *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

6 11, ,323 11,50 11, ,815 19,439 11, ,683 11, ,815 Figure 3 Graph Compressive Strength Using Waste 5 % and Silica Fume ( Cylindrical Shaped Test Objects ) Based on Figure 3, it was concluded that the use of silica fume with a composition of 9 % can improve the compressive strength higher at Mpa at days compared to the use of silica fume with other compositions. Analysis Value Compressive Strength Concrete with Waste Concrete 100 % and Silica Fume In this study is testing the compressive strength of concrete with concrete waste 100 % instead of the coarse aggregate with the use of silica fume composition 6 %, 9 %, and 12 % at the age of and days. Results of testing compressive strength of concrete in this study are as follows : Table 4 Value Compressive Strength Concrete ( Waste 100 % and Silica Fume ) 100% Silica Fume 6% 9% (hari) (kg) (kg) 11, ,816 11,80 11, , , ,816 11, ,816 11,10 11, , , ,115 11, , ,30 11, , , , , ,4 11,333 11, , ,82 19,533 19,155 20,60 *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

7 12% 11, ,816 12, ,816 12,92 12, , , , ,11 12, , ,30 12, , , , ,005 Figure 4 Graph Compressive Strength Using Waste 100 % and Silica Fume ( Cylindrical Shaped Test Objects ) Based on Figure 4, it was concluded that the use of silica fume with a composition of 9 % can improve the compressive strength higher at Mpa at days compared to the use of silica fume with other compositions. Figure 5 Comparison Chart Compressive Strength In Concrete Normal, Recycle, Recycle + Silica Fume (Cylindrical Shaped Test Objects) *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

8 So the conclusion from the test results of compressive strength of all compositions is normal concrete has a compressive strength supreme with the compressive strength average of 3.19 MPa followed by the composition of the mixture of waste utilization 50% have a compressive strength average of 20.8 MPa, followed by the composition of the mixture of waste utilization 50% and silica fume 9% have a compressive strength average of 20.8 MPa, followed by the composition of the mixture of waste utilization of 0% and silica fume 9% have a compressive strength average of MPa, followed by the composition of the mixture of waste utilization 100% and silica fume 9% have the average compressive strength of MPa. CONCLUSIONS AND RECOMMENDATIONS Based on the research that has been done, it could be concluded as follows: a. Concrete with recycled materials by 50%, 5%, and 100% indicates that the compressive strength is happening does not reach the compressive strength of 35 MPa plan. The resulting value on recycled concrete amounted to MPa, 19,250 MPa, and 1.14 MPa at days. This is because the concrete material that has a value of recycled sludge levels were quite high at 4.26%. Where figures for the maximum requirements in NFPA sludge concentration value is equal to 2%. Concrete using concrete waste materials in this study can not raise the compressive strength, it is because the content of aggregate characteristics do not meet the requirements. b. The results showed that the recycled concrete using concrete waste amounted to 100% of the weight of coarse aggregate and silica fume equal to 9% of the total cement weight will produce a value of MPa compressive strength. This shows a decline of 40.68% of the compressive strength of 35 MPa plan. c. Of the conclusions of a and b above shows that the use of silica fume of 9% will slightly increase the compressive strength of the concrete. This is because the silica fume may reduce the permeability of concrete. Advice can be given for further research are: Please note the use of recycled aggregate are better in terms of variety testing, because the content of the mud on the coarse aggregate is produced under ISO standards. This is probably because the concrete material recycling and treatment needs laundering more optimal. Do further research on the variety and effect of silica fume on recycled concrete for the purposes of the banking parameters of the compressive strength of concrete is expected. Do further research on the use of waste concrete samples of the recycled concrete, with more variety in order to be able to produce concrete material test parameter values in accordance with ISO standards REFERENCE ASTM C.150.Portland Cement ASTM C.260.Standard Specification for Air-Entraining Admixture for Concrete. Bobiandikaputra. Definisi Semen Secara Umum. Jakarta, Duma, Heidi.Studi Perilaku Lentur dan Susut pada Agregat Daur Ulang.Depok.Fakultas Teknik Sipil.2008 Febriyanto, Hendy. Pemanfaatan Bahan Padat Sebagai Agregat Kasar Pada Pembuatan Normal.Depok: Jurusan Sipil Mulyati & A, Arman.Pengaruh Penggunaan Sebagai Agregat Kasar Dan Agregat Halus Terdapat Normal.Padang: Institut Teknologi MulyonoTri,Ir. MT, Teknologi,Andi,Yogyakarta,2004 Rahmadiyanto, Candra; Samekto, Wuryati., Teknologi, Penerbit Kanisius, Jakarta, SII No Mutu dan Cara Uji Agregat.Jakarta:1980. SNI Sfesifikasi Bahan Tambahan Pembentuk Gelembung Udara untuk. SNI Tata Cara Pembuatan Rencana Normal. SNI Tata Cara Perhitungan Struktur untuk Bangunan Gedung (Beta Version). SNI Spesifikasi Agregat Halus untuk Pekerjaan Adukan dan Plesteran dengan Bahan Dasar Semen. SNI Sfesifikasi Agregat Ringan untuk Batu Cetak Pasangan Dinding. SNI No Semen Portland. *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap

9 Taufik, Rahmat.Pengaruh Penggunaan Agregat Daur Ulang Kedalam K 15.Medan:Jurusan Teknik Sipil Tjaronge,Wihardi. Akkas, Abd Madjid. Ulvah, Andi Sri.Kajian Eksperimental Yang Menggunakan Pecah Ringan Sebagai Pengganti Agregat Kasar.Makassar: Jurusan Sipil BIOGRAPHY Andika Sari Putri born IN Jakarta on July 31, Author graduated in Bina Nusantara University in Civil Engineering Major in *Analisa Pengaruh Penggunaan Agregat Kasar Daur Ulang Dan Silica Fume Terhadap