One of the considerations in selecting Glass Fiber Reinforced Polymer (GFRP) as a substitute for conventional reinforcement is its ability against corrosion makes it suitable for structures directly related to land, water, and corrosive areas. Regarding strength, GFRP which has high yield strength is very suitable as a reinforcement to hold the shear force. Similarly, as with steel bar, GFRP reinforcement is used as a composite material of reinforced concrete; therefore, it is worth to know the grade of the bond strength. The bond strength is one of the crucial factors to have a good interaction between GFRP and concrete in holding workloads on structures so that the study is conducted to get the grade of the bond strength of GFRP reinforcement with monolith concrete cast. The experiment is using the pullout test with a cube specimens, sized 250 mm × 250 mm × 250 mm and GFRP bar sized 25 mm diameters. Bond strength of GFRP reinforcement will then be close compared to the bond strength of BJTS40 deform rebar sized 25 mm diameters. The concrete used in this study has about f'c 100 MPa. The test results indicate the grade of bond strength of GFRP reinforcement with concrete reaches 6.54 MPa and the bond strength of steel bar with concrete reaches 8.22 MPa. The degree of bond strength of GFRP reinforcement is smaller 79.56% than the bond strength of the steel reinforcement. What the failure happened on all test objects is the mode of splitting failure.

In precast concrete, a connection is needed to unite the components so that they become a whole unified structure. This study aims to determine the reinforcement strength and length of reinforcement in precast concrete connections. To paste reinforcement into precast concrete, giving additional material in the form of grouting which is called sika grout 215 and functions as an adhesive is necessary. Pullout testing is carried out in the laboratory, and its simulation by modeling uses the finite element method based software. This research is divided into 2 phases. The first phase is making specimen to examine the bond strength between the concrete and reinforcement that has been given sika grout 215. So monolithic specimen is made as a comparison. The result of the bond strength of the monolithic test specimen is 6.24 MPa, and the sika grout 215 category is 6.52 MPa. From the experimental results in the laboratory with modeling, it is obtained the bond strength ratio of 0.94. The length of development (ld) based on the results of the testing phase I of 200 mm. The second phase is examining the damage pattern due to the stress that occurred. Specimens are made into 4 categories, namely modeling developments with the length of 120 mm (<40% ld), with the length of 160 mm (<20% ld), with length of 200 mm (= ld), and with the length of 260 mm(> 30% ld) both for monoliths and sika grout 215. The damage pattern, which is in the form of yielding and breaking reinforcement as the result of the pullout experiment in the laboratory shows not much different from the result of simulation using the software.

Along with the Jakarta Governor rules no. 38/2012 about green building, The Contractors in the capital has been practicing to implement green construction in building construction. This is done by a contractor state-owned or private contractor. The purpose of this research is analyzing the application of green construction by state owned contractors who is not a member of green building council Indonesia. Collecting data which used in this research was questionnaire, observation, and documentation. The reference of indicators are from regulations, rating tools GBCI and models assessment green construction developed by Wulfram Ervianto. The Indicators are health program and occupational safety, environmental health work, air quality construction phase, election and operational construction phase, planning and scheduling construction equipment, documentation construction project, building & enviroment management, training for subcontractor, waste management, the source and cycle construction, material storage and protection, appropriate site development, reduction ecological footprint the project, protection plan, water conservation, and efficiency & energy conservation. The method of analysis data questionnare are descriptive analysis. The result of research is average value of the implementation of green construction by 85,08 % which means that green construction points of the indicators as a whole has taken and implemented by contractor.Keywords: green construction; construction phase; GBCIABSTRAKSeiring dengan diberlakukannya Peraturan Gubernur DKI Jakarta No. 38 Tahun 2012 mengenai Bangunan Gedung Hijau, kontraktor-kontraktor di Ibukota mulai menerapkan konstruksi hijau dalam proses pembangunan gedung. Hal itu dilakukan oleh kontraktor milik negara ataupun kontraktor milik swasta. Tujuan penelitian ini adalah menganalisis penerapan konstruksi hijau oleh kontraktor milik Negara yang bukan anggota Green Building Council Indonesia. Pengumpulan data yang digunakan dalam penelitian ini adalah kuisioner, observasi dan dokumentasi. Acuan indikator konstruksi hijau dari peraturan perundangan- undangan, rating tools GBCI dan model assessment green construction yang dikembangkan oleh Ervianto. Indikator tersebut antara lain program kesehatan dan keselamatan kerja, kesehatan lingkungan kerja tahap konstruksi, kualitas udara tahap konstruksi ,pemilihan dan operasional peralatan konstruksi, perencanaan dan penjadwalan, dokumentasi, ,manajemen lingkungan proyek konstruksi, pelatihan bagi subkontraktor, manajemen limbah konstruksi, sumber dan siklus material, penyimpanan dan perlindungan material, tepat guna lahan, pengurangan jejak ekologis, rencana perlindungan lokasi pekerjaan, konservasi air, dan efisiensi dan konservasi energi. Metode analisis data kuisioner ialah dengan analisa deskriptif. Hasil dari penelitian didapatkan nilai rata-rata penerapan green construction sebesar 85,08% yang artinya bahwa poin poin dari indikator konstruksi hijau secara keseluruhan telah diperhatikan dan diimplementasikan oleh kontraktor.Kata Kunci: konstruksi hijau; fase konstruksi; GBCI

The problem in the The Conexio Cikunir 1 Apartment project which has the concept of Transit Oriented Development (TOD) was had delayed, which should have been 100% contractually completed, but only 46.231% have been realized. Based on these percentages, required an analysis of the dominant factors that causes of delayed in this project. This study has purpose to determine the dominant factor influencing the variables causing project delayed. Questionnaires were distributed to the respondents consisting of the contractors, owners and supervisory consultants involved in the apartment construction project. The results of the questionnaires were processed using SPSS 25 software. The data analysis method used is multiple linear regression method. The results of the research shows that factors which fulfilled on the partial test (t test) and has a significant influence is document of works variable (5.792 ) . This value has the highest rank of significance value for project delayed. Futhermore is planning & scheduling variable (2,805), equipments variable (2,482), managerial variable (2.324), materials variable (2,248), and external factors variable (2.094). The result of Adjusted R Square of 62.70% shows that the Factors that Causes of Delayed can affect the Project Delay variable by 62.70%, while the remaining 37.30% is affected by other variables not examined in this study.

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