Browsing by Author "Kurniawandy Alex"
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Item ANALISA FAKTOR UMUR PAVING BLOCK(2013-04-22) Herman; Kurniawandy Alex; ErmiyatiPaving block widely used in constructions, such as pavement, residential street, parking lot and many others. Easiness of installation, low cost maintenance, and beautiful aspect of it leads to more people prefer to use it, there are no set of standards to predict approximate age of paving block making it difficult for developer, contractor and owner to determine the compressive strength if it is not tested at age 28 days (more or less 28 days). Therefore, author conducted a study to test the compressive strength of paving block at age, 3,7,14,21,28,56, and 91 days, from this study we could know age factors value of amplify strength of paving block based on the increasing of paving block age. The study was conducted at “PT. Multi Guna Jaya Murah” with mixed composition obtained from proctor tests which conducted at “Laboratorium Teknologi Bahan Universitas Riau” the result of age factors value for paving blocks at age 3,7,14,21,28,56, and 91in sequences are 0 ,757; 0,837; 0,949; 0,986; 1.000; ,1,013; and 1,065 different with age factors value of a concrete are 0,400; 0,650; 0,880; 0,950; 1,000; 1,20; and 1,30.Item ANALISIS PERBANDINGAN KINERJA STRUKTUR GEDUNG TAK BERATURAN AKIBAT BEBAN GEMPA SNI 03-1726-2002 DAN RSNI3 03-1726-201X (Studi Kasus Menara Dang Merdu Bank Riau Kepri)(2013-04-10) Asneindra, Mario; Djauhari Zulfikar; Kurniawandy AlexIn an effort to reduce the loss of life and damages caused by the earthquake, the Ministry of Public Works has released the latest Indonesia Earthquake Hazard Maps in 2010. This map illustrates the peak acceleration and response spectra at bedrock probabilistic analysis for the various periods of the earthquake. With the issuance of the 2010 Indonesian Earthquake Map has a different concept to the Indonesia Earthquake Maps contained in SNI 03-1726-2002, it is currently being drafted RSNI3 03-1726-201X refers to ASCE 7 in 2010. Dang Merdu Tower of Bank Riau Kepri is one of the new irregular buildings built in the city of Pekanbaru that calculations still refer to SNI 03-1726-2002. For that conducted research on the differences in the performance of the structure when earthquake loads imposed SNI 03-1726-2002 and RSNI3 03-1726-201X.The results showed that the seismic force-resisting system that may be used by SNI 03-1726-2002 is dual system Intermediate Moment Resisting Frame with reinforced concrete shear wall. While the structure of the system that may be used by RSNI3 03-1726-201X is a dual system Special Momen Resisting Frame with special reinforced concrete shear wall. Under each of these systems base shear force result of earthquake loads of RSNI3 03-1726-201X increased by 27.85% compared to SNI 03-1726-2002. Total drift by the earthquake load of RSNI3 03-1726-201X increased by 34.94% in the X direction and 32.85% in the Y direction of the total drift of SNI 03-1726-2002. Overall structure can resist load combination of SNI 03-1726-2002 however, the structure could not resist load combination of RSNI3 03-1726-201X it looks a structural component experiencing overstress.Item PEMANFAATAN ABU DASAR (BOTTOM ASH) SEBAGAI BAHAN SUBSTITUSI PASIR PADA BETON MUTU NORMAL(2013-07-23) Pradita, Surya; Kurniawandy Alex; Djauhari ZulfikarThis research determines the optimal composition of bottom ash waste replacement of sand that can be used in normal quality concrete (K-100, K-175 and K-250) and assess the influence of bottom ash waste to the compressive strength, absorption, porosity, and shrinkage of concrete. Percentage of waste bottom ash is used by 0%, 10%, 20%, and 30% of the weight of the sand.The results showed that the use of bottom ash to the compressive strength testing of concrete quality on all three types of plans tend to be lower when the compressive strength of concrete. Decline increases with the addition of bottom ash in concrete mixtures. However, the resulting compressive strength on all variations of the use of bottom ash still meet the standards of the planned concrete strength. Based on test results obtained composition compressive strength concrete mix with the optimum use of bottom ash is 30% on each of the quality of concrete plans. The use of bottom ash in concrete mixtures tend to increase the absorption and porosity of the concrete, but the concrete shrinkage decreases.Item PEMANFAATAN ABU SAWIT SEBAGAI BINDER PADA SELF- COMPACTING CONCRETE (SCC)(2013-07-04) Harahap, Mei Eftarika; Olivia Monita; Kurniawandy AlexThis study analyse the workability and compressive strength of Self-Compacting Concrete (SCC) by using palm oil ash as mineral admixture for binder. Workability examined was flowability, fillingability, and passingability using a Slump Cone, V-Funnel and L-Box. Palm oil ash added in the mixture was 5%, 10%, 15%, and 20% from weight of the binder. Research showed the flowability and fillingability of SCC decreased with addition of palm oil ash in the mixture. Passingability increased with percentage of ash addition in the mixture. The optimum of flowability using T50 and slump flow was obtained at mixture with using 10% addition of palm oil ash. While the optimum flowability was determined for mixture with 5% ash using V-Funnel. Passing ratio of all mixtures was in the range from EFNARC, 2002. The maximum compressive strength of SCC was 34.82 MPa at 28 days concrete age for mixture using palm oil ash of 10%.Item PENGARUH PENAMBAHAN SILICA FUME PADA CAMPURAN PAVING BLOCK TERHADAP KARAKTERISTIK PAVING BLOCK(2013-04-22) Endika, Eko; Kurniawandy Alex; ErmiyatiThe purposes of this research are how to plan of paving block mixture optimum with the addition silica fume and to study the effect addition silica fume against paving block characteristics. That characteristics are compressive strength and water absorption. Mix design of paving block used proctor methods. The percentage of silica fume used 0%, 5%, 10%, 15%, and 20% by weight of cement. Specimens cube of 8 × 8 × 8 cm for compressive strength testing and specimens beam of 21 × 10,5 × 8 cm for water absorption testing with a total 75 samples. The compressive strength and water absorption were tested at 28 days. The results showed that the effect addition silica fume on paving block can increased the compressive strength and minimized the water absorption compared paving block without this additive. Compressive strength obtained with the addition 0%, 5%, 10%, 15%, and 20% silica fume were 36,5 MPa, 40 MPa; 39,5 MPa; 37,6 MPa, and 36,9 MPa. Water absorption obtained with the addition 0%, 5%, 10%, 15%, and 20% silica fume were 1,93%, 1,77%, 1,80%, 1,89%, and 1,91%. The highest compressive strength and the smallest water absorption were paving block with the addition 5% silica fume at 40 MPa and 1,77%.Item PENGARUH PENGHILANGAN KULIT CANAI TERHADAP SIFAT MEKANIS BAJA TULANGAN BETON(2013-07-27) Idris, Mahendra; Kurniawandy Alex; Fatra WarmanAccording to SNI 07-2052-2002 in tensile test on concrete reinforcing steel rolled skin should not be removed, so it is not profitable for institutions that provide services because does not have the tensile test machine with a large capacity. This study was conducted to find out the effect if the diameter of the specimen is reduced in tensile testing. This test compares the applicable standard SNI 07-2052-2002 with the following diameter rebars SNI 07-2529-1991 and ASTM E8 M, to find a comparison the value of the yield and tensile specimens. SNI 07-2052-2002 mention that yield value for U 40 can not be less than 390 N/mm2 and tensile values for U 40 is not less than 500 N/mm2. Based on research, the use of standard SNI 07-2529-1991 and ASTM E8 M if viewed from the value Yield (390-480 N/mm2) and Tensile (600-688 N/mm2) still resides in the Standard SNI 07-2052-2002 range.Item PENGARUH VARIASI BENTUK PAVING BLOCK TERHADAP KUAT TEKAN(2013-07-01) Putra, Arie; Kurniawandy Alex; AzhariThe purpose of this research is to know the effect of paving block original shape variations and test shape of paving block with SNI standard 03-0691-1996 against compressive strength. Mix design of paving block in this research used proctor methods with cement ratio and fine aggregate allowed 1 : 2,857. Beam specimen with dimension 20×10×8 cm and cube with dimension 8×8×8 cm and hexagon specimens with lateral side dimension 10 cm and heavy 8 cm and then cube with dimension 8×8×8 cm for testing of compressive strength, while the specimen of beam with dimension 20×10×8 cm and specimen of hexagon with lateral dimension 10 cm and heavy 8 cm for testing of water absorption with total specimen 46 sample. The testing of compressive strength and water absorption conducted at 28 days. The result of compressive strength value was produced by testing of compressive strength with compression machine and the test of ultrasonic pulse velocity (UPV) towards specimen of original shape and specimen of cube shape with SNI standard. The result of the research showed that testing result of compression strength with compression machine between original shape of paving block and cube shape with SNI standard there were significant differences. Compressive strength of specimen beam with dimension 20×10×8 cm with cube with dimension 8×8×8 cm and specimen of hexagon with lateral dimension 10 cm and heavy 8 cm and cube with dimension 8×8×8 cm were obtained for each of it 39,58 MPa ; 34,22 MPa ; 53,50 MPa dan 32,89 MPa. The Average of water absorption that was obtained for the beam specimen and hexagon were respectively 2,66 dan 2,62%.Item PERBANDINGAN ANTARA SISTEM RANGKA BATANG BIDANG (PLANE TRUSS) DENGAN SISTEM RANGKA RUANG(SPACE TRUSS) PADA PERENCANAAN STRUKTUR ATAP STADION UTAMA RIAU(2013-04-22) Nofrianto, Ikhsan; Kurniawandy Alex; S Romey IskandarThe roof structure of Riau Main stadium was a long span roof structure that designed as an arch structure. The main frame of this structure is using plane truss system with the length of span up to 45 metres. But in fact, it was rarely used as a stadium roof structure right now. Space truss is one of many kind of stadium roof structure widely used especially in long span design and also with it’s advantages,it could be considered. The purpose of this research was to compare of the stiffness, the strength and the economical aspect of the roof structure framework beetwen the Space truss system towards the Plane truss system. In this final project was presented the results of structure design that in case, the Using of space truss system as the roof structure designed has more higher stiffness values than a plane truss, the space truss-pipe system has the lightes weight with efficiency value up to 23.19 % against the plane truss weight, and the space truss-combination system has efficiency 19,91% against the plane truss weight. From the the strength ratio aspect, space truss structure could match the strength of the plane truss structure, in erection of segmen 3, the space truss-pipe structure has the highest stiffness towards the earthquake and the wind force as well as It’s strength . in Conclusion the using of the space truss structure was more economic especially space truss-pipe structure.