Asphalt quality improvement efforts starts from the construction of buildings, infrastructure and roads continue to be developed. This development will increase the need for material used. This study aims to (1) determine the effect of bagasse ash filler with concrete waste as a coarse aggregate on Marshall characteristics on asphalt concrete mixture, in terms of density, VIM (void in the mix), VMA (voids in mineral aggregates), VFA (void filled with asphalt), stability, flow (melting), and MQ (Marshall quotient). (2) As well as knowing the suitability of the Marshall test results with the requirements of Bina Marga 2010. This study uses an experimental testing method implemented by making test specimens following existing standards and conditions, as well as the use of bagasse ash as filler material and concrete waste as a substitute for coarse aggregate in asphalt mixture, with a variation of the percentage using bagasse ash filler with 0%, 5%, 10%, and 15% content. For each treatment, three samples were made. The results of testing the concrete asphalt mixture are: (1) density 2.16 gr/cc, VIM 11.56%, VMA 17.39%, VFA 33.91%, stability 3263.92 kg, flow (melting) 2.03 mm, MQ 2353.70 kg / mm. (2) Test results for all specimens, with the addition of bagasse ash filler as asphalt mixture filler, have met the 2010 Bina Marga requirements, as a minimum requirement for the highway, with stability values of more than 800 kg and flow values between 2 mm to 4 mm.

A concrete structure reinforced with reinforcing bars formed an important part on current infrastructures. The high compressive strength of concrete combined with a high tensile strength of steel give an ideal composite material which offer a wide range of application within civil engineering structures. The aim of this research is to observe the corrosion process on reinforcing bars of reinforced concrete structure which is made by local aggregates which have the compressive strength ranged from 25 to 30 MPa, with different quarry in the area of Special Region of Yogyakarta. The ASTM G-109 and Florida Test of Method FM 5-522 are chosen to conduct this research. The test was conducted 45 to 60 days with following data to be taken: water salinity (pH), voltage reading relative difference, reinforcing bar’s mass loss. The data processed to obtain corrosion current density (CCD) and corrosion rate (CR). The results as follow : (1) the voltage difference’s reading on each specimens attempt to be similar, (2) the CCD on each specimens behave differently with relative differences of 1,68%, (3) the CR on each specimens behave differently with relative differences of 0,66%, (3) the specimens behave similarly regardless the differences between two of them.

The main purpose of this research is to get design parameters that can be used as a basis for consideration for the design of the final construction. This is a development research where the product that will be produced is a software. The developed software using Borland Delphi XE 3. The data will be analysed in the form of data nodal displacement, reactions, and styles in, in the form of different relative to the reference software. The data obtained during testing processed and presented in the form of tables and graphs. As comparison to verify the data issued, used MS Excel and commercial program. Based on the results of the research can be deduced that: (1) Program designed still has relative error 0%. This indicates that the program is designed to have the level of thoroughness is good enough, (2) The program can be started with a simple input and can run well without any obstacles, (3) Program is still limited to the delivery of the result is numeric, not display the results in the form of graphics, (4) Input data entered is also still in the form of numbers, not be graphics.

Concrete structures reinforced with steel formed an important part of recent infrastructures. Today, the rate of use of cement is higher than 40 years ago. An approximation amount of 11 billion metric ton of cement per year has been consumed in the whole world. The aims of this research are: (1) to obtain the durability value of concrete with PPC Premium Cement and PPC Non-Premium Cement, (2) to obtain the degree of comparison of concrete durability, (3) to obtain the durability parameters. This research based on ASTM International standards, conducts in 224 days non-stop, to obtain following data: (1) compressive strength, (2) rebound number, (3) pulse velocity number, (4) modulus of rupture, and (5) corrosion rate. The test result: (1) PPC Premium cement give a relatively good performance rather than PPC Non-Premium cement. This is based on both destructive and non-destructive test, (2) the modulus of rupture’s value also giving the PPC Premium cement act relatively good than PPC Non-Premium cement, (3) test on severe environment, concrete treatment by mean of waterproofing proved to be effective to reduce the rate of steel destruction., (4) on a practical use, cement with high fineness modulus can give a better performance.

Peat soil can be found in several place in Indonesia, one of them in Kalimantan. Peat soils with its characteristic have highest compressibility among than other soil types. The experimental modeling of foot plate foundations in peat areas was too difficult to be performed. Numerical modeling can be one of the efforts to determine the optimum results with a relatively more economical cost. This study modeled the foot plate foundation structure where located on peatland with different elevation of peat soil into the elevation of the foundation. Peat soil elevation had been determined successively below the foundation elevation, the same level of the foundation elevation and above the foundation elevation. All geometric and material data had been obtained from field data. The analysis performed in static analysis with in 2D shell idealization by utilizing Abaqus software version 6.14-2. Numerical results had been also compared with analytic results. The result of the research showed that there is a match between numerical result and analytic result. The stress occurred at the base of the foundation for each peat soil elevation difference correspondently 16,53 MPa, 9.34 MPa and 3.59 MPa. The lowest stresses occurred when the peat soil elevation located above the foundation elevation (78.28%).