#TITLE_ALTERNATIVE#

• Main Author: MUHAMAD ISNAN KURNIA (NIM : 13013051) - GHEADY WHELAND FAIZ MUHAMMAD (NIM : 13013065), NUR
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23582
• Institution: Institut Teknologi Bandung

Conventional building construction has many drawbacks such as a lot material are used and need long time for construction also weakness in the building. The weaknesses can be overcome by replacing the main building material by lightweight concrete. This concrete can be produced from silica sand which is abundant in Indonesia. The purpose of this study is to produce lightweight concrete from silica sand as raw materials to be applied in building construction. Specific objective of this study are <br /> <br /> developing of formulations and processes of lightweight concrete production for construction materials and study the physical properties of the resulting lightweight <br /> <br /> concrete. The main materials used in this study are cement, silica sand, and with fly ash. <br /> <br /> Materials composition and foam agent were varied in this study. Foaming agents types were also varied between aluminum paste and preformed foam. Silica sand particle size was varied between 30-70 mesh and 70-120 mesh. Characterization of density, compressive strength, and porosity was done in order to examine the effects of the <br /> <br /> variations. <br /> <br /> Based on the results of the study, the higher the content of cement, lightweight concrete mass would decrease and compressive strength would increase. Increasing fly ash content leads to a decrease in lightweight brick mass. The difference in sand particle size did not affect the density and lightweight brick porosity significantly. However, the sand with smaller particle size can slightly increase the compression strength of lightweight concrete. Between the couple of foaming methods performed, the foaming process with preformed foam produces a much higher compressive strength than foaming with aluminum paste. And for the effect of curing time, the longer the curing time, the smaller the lightweight brick mass and the higher the test results of the compressive strength of the lightweight bricks. The best formulation resulted from this research is lightweight concrete which composed by 40% w / w cement, 50% w / w fly ash and 10% w / w silica <br /> <br /> sand with G.Foam 1420 foaming agent. This lightweight concrete density is 0.776 g / cm3 and its compressive strength is 17.78 kg / cm2.