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All Journal Media Teknik Sipil MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik ITS IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science EMARA : Indonesian Journal of Architecture Journal of Civil Engineering JTT (Jurnal Teknologi Terpadu) Civil Engineering Dimension Civil Engineering Journal Jurnal Aplikasi Teknik Sipil E-Jurnal SPIRIT PRO PATRIA

Tavio, Tavio

Institut Teknologi Sepuluh Nopember

Author-ID : 209522

Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering

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The Effect of Styrofoam Artificial Lightweight Aggregate (ALWA) on Compressive Strength of Self Compacting Concrete (SCC) Darayani, Dhiafah Hera; Tavio, Tavio; Raka, I G. P.; Puryanto, Puryanto
Civil Engineering Journal Vol 4, No 9 (2018): September
Publisher : Salehan Institute of Higher Education

Self-compacting concrete (SCC) is a fresh concrete that is able to flow and fill up the formwork by itself without the need of a vibrator to compact it. One of the reasons that causes the damage of a building structure during an earthquake is the heavy weight of its structural members which are from the high density of the material used such concrete material. Lightweight aggregate is one of the solutions to reduce the weight of the structure. Therefore, the SCC using the artificial lightweight aggregate (ALWA) is one of the solutions to reduce the self-weight (dead load) of a structure. This research was conducted to investigate the impact of the use of ALWA in conventional concrete and SCC in terms of its compressive strength and modulus of elasticity. To study the impact of the use of ALWA in SCC, several variation of percentage of ALWA as a substitution to the natural coarse aggregate was examined. The proportions of ALWA as a replacement to the coarse aggregate were 0%, 15%, 50%, and 100%. The test specimens were the cylindrical concrete of 200 mm in height and 100 mm in diameter for both compressive strength and modulus of elasticity tests. The results of the compressive strength test indicated that the higher the percentage of ALWA used in SCC, the lower the compressive strength of the concrete. The addition of ALWA as a substitution to the natural coarse aggregate to conventional concrete and SCC was found optimum at 15% replacement with the compressive strength of conventional concrete and SCC of 21.13 and 28.33 MPa, respectively. Whereas, the modulus of elasticity of the conventional concrete and SCC were found to be 20,843.99 and 23,717.77 MPa, respectively.

Comparison of Compressive and Tensile Strengths of Dry-Cast Concrete with Ordinary Portland and Portland Pozzolana Cements Rasyiid Lathiif Amhudo; Tavio Tavio; I Gusti Putu Raka
Civil Engineering Journal Vol 4, No 8 (2018): August
Publisher : Salehan Institute of Higher Education

Concrete is the most widely used construction material in the world. Along with the increasing economic needs in the development of construction, precast technology has become a primary solution that leads to the industrialization. The use of precast concrete system offers several advantages, such as rapid erection, higher product quality, lower project cost, better sustainability, and improved occupational health and safety. In general, there are two casting methods used in concrete placement, namely wet- and dry-castings. The dry-cast concrete has also been used for its advantages particularly in precast concrete industries, e.g. its rapid hardening time for fast mold removal (it significantly increases the plant productivity). The use of Portland Pozzolana Cement (PPC) as a replacement to Ordinary Portland Cement (OPC) has become increasingly popular for the past decade. Hence, its application in dry-cast method needs to be further investigated for its mechanical properties such as its compressive and splitting tensile strengths. An experimental work was carried out to examine the properties of dry-cast concrete using both types of cements (PPC and OPC). The development of its compressive strength was also monitored at 1, 7, 14, 21, 28, and 56 days of age. The splitting test was conducted to describe the tensile strength of dry-cast concrete. The observation of crack and failure behaviour of all concrete specimens were also carried out.

Compressive Strength of Steel-Fiber Concrete with Artificial Lightweight Aggregate (ALWA) Meity Wulandari; Tavio Tavio; I G. P. Raka; Puryanto Puryanto
Civil Engineering Journal Vol 4, No 9 (2018): September
Publisher : Salehan Institute of Higher Education

In the last decade, there have been many innovations developed to replace the aggregate as material for concrete, particularly the coarse aggregate using the artificial lightweight aggregates a.k.a. ALWA. In the study, the main ingredient used to develop the artificial lightweight aggregates is the styrofoam. Styrofoam has a lightweight characteristic so that it can reduce the density of the concrete. If the density of the concrete can be lighter than the normal-weight concrete then the overall weight of the structure of a building will also be lighter. Thus, the shear force due to the earthquake will also be smaller so that the safety of the building becomes better. The styrofoam used was dissolved with the acetone solution and formed into granules in which the size resembled the coarse aggregate size of about 10 to 20 mm. The styrofoam which has been formed then dried up so that the texture becomes hard. In addition, steel fiber was also used as an added ingredient in concrete mixtures so that the concrete was highly resistant against cracking and was expected to increase the compressive strength of the concrete. ALWA compositions used to replace coarse aggregates were 0%, 15%, 50%, and 100%. While the composition of steel fiber used was 0%, 0.75%, and 1.5% of the total volume of the cylinder. The type of steel fiber used was hooked-end steel fiber with the diameter and the length of 0.8 mm and 60 mm, respectively. The results showed that the concrete with 15% styrofoam ALWA and 1.5% of steel fiber were able to produce optimum compressive strength by 28.5 MPa and the modulus of elasticity by 23,495 MPa. In addition, the use of Styrofoam ALWA as a substitution to the coarse aggregate can reduce the density of concrete as much as 5 to 35%.

FE Model of Low Grade Rubber for Modeling Housing’s Low-Cost Rubber Base Isolators Hidajat Sugihardjo; Tavio Tavio; Yudha Lesmana
Civil Engineering Journal Vol 4, No 1 (2018): January
Publisher : Salehan Institute of Higher Education

An accurate selection of strain energy function (SEF) plays a very important role for predicting the actual behavior of rubber material in the finite element analysis (FEA). The common method for selecting the SEF is by using the curve fitting procedure. However, the behavior of some typical rubbers, such as low grade rubbers (average hardness value of 47.2), cannot be predicted well by only using the curve fitting procedure. To accurately predict the actual behavior of such specifically nearly incompressible material, a series of FEA were carried out to simulate the actual behavior of four physical testing materials, namely the uniaxial, the planar shear, the equibiaxial, and the volumetric tests. This FEA is intended to examine the most suitable constitutive model in representing the rubber characteristics and behavior. From the comparisons, it can be concluded that the Ogden model provides a reasonably accurate prediction compared to the remaining investigated constitutive material models. Finally, the appropriate SEF, i.e. the Ogden model, was adopted for modeling a low-cost rubber base isolator (LCRBI) in the finite element analysis (FEA). The simple uniaxial compression test of the LCRBI is required for validating that the selected SEF works for predicting the actual behavior of LCRBI.

Co-Authors . Faimun A. B. Habieb A. Tata Agoes SMD Agoes SMD Agus Sulistiawan Agustiar, Agustiar Ahmad Fatihuddin Afif Alfred Edvant Liemawan Aman Subakti Angga Bayu Christianto Arbain Tata Ardiansyah Kusuma Negara Atik Wahyuni Bambang Piscesa Benny Kusuma Dhiafah Hera Darayani Dwiputro Raharjo F. Milani Fachrul Fachrul Rizal Fajar Aribisma Fauzan Kurnianto Firdauziah Ramadhani Firly Ayu Agus Dian G. Milani Halimatus Sa’diyah Harsono, Budwi Harun Al Rasyid Hemas Mutia Anggraini Heppy Kristijanto Hidajat Sugihardjo I G. P. Raka I Gusti Putu Raka I Nyoman Budiantara Iman Wimbadi Indra Degree K. Iranata, Data Irawan, Candra Karmila Achmad Karmila Achmad Karmila Achmad Killian Casey Wisman Kurdian Suprapto Meity Wulandari Mohammad Akbar Alrasyidi Muhammad Farhan Firmansyah Nathanael Christopher Sutopo Parmo Parmo Parmo Parmo Parmo Parmo Priyo Suprobo Pudjisuryadi, P. Purwadi Agus Darwito Puryanto Puryanto Puryanto Puryanto Puspa Ramadhani Raditya, Murry Raka, I G. P. Rasyiid Lathiif Amhudo Recky Tirtajaya Suzzan, Amelynda Oktaviyana Vincentius Felix Susanto Wildan Pramadistya Rifliansah Yanisfa Septiarsilia Yanuar Siscaria Rahmawati Yudha Lesmana

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