Advanced technological knowledge, highly influences the achievement of the strong, sturdy and good quality of construction targets. Nanotechnology becomes a massive concern to the scientists around the world in conducting various research and engineering the adjustment of material, size, managing the chemical composition and controlling the interactions between particles. One of them is a nano scale research which is widely applied to nanocomposite materials. The nano-sized particles have a very high interaction surface. The more particles interact, the stronger bond of the material. It makes the bonds between the particles get stronger and the mechanical properties of the material increase. However, the addition of nanoparticles does not always improve its mechanical properties. *Author for correspondenceThere are certain limitations when adding the nano material, the strength actually decreases. Epoxy resin is defined as a low molecular pre-polymer containing more than one epoxide group. Epoxy resin is an epoxy oligomer, which can form a three-dimensional network of thermosetting materials when it reacts to hardeners [1]. Epoxy is resistant to heat, it has higher mechanical strength and has good corrosion resistance [2]. Epoxy can be used as a material for repairing and connecting the rifts of concrete structures, the plaster layers in brittle concrete structures, and the water proof [3]. Epoxy reacts very easily with hardener when it is mixed, there is a change from initially liquid to solid. With the addition of nanocalcium, epoxy resin and hardener can increase the thermal stability of the material [4]. Epoxy resin is often used as a mixture for glass fiber, carbon, hybrid, and boron graphite. Epoxy resin has several advantages than the polyester resin, such as lower density, higher modulus of elasticity,
As a city develops, the demand for buildings increases. The implementation of construction increasinglyrequires very high costs due to rising prices and reduced raw materials. Utilization of Bottom Ash as amixture for making concrete has properties and shapes such as fine aggregate. Lightweight concrete is aspecial type of concrete designed for specific purposes. It generally has a density of less than 1900 kg/m3with a compressive strength of around 20 N/mm2. The purpose of using this Bottom Ash mixture isexpected to reduce the weight of concrete without reducing the compressive strength of the concrete. Thepercentage Bottom Ash mixture used was 10%, 20%, 30%, 40% and 50%. The results of the analysisshow that by using a mixture of 50% Bottom Ash, the specific gravity obtained reaches 1,738 kg/m3 with acompressive strength of 18.73 MPa while the maximum compressive strength is found in a 30% BottomAsh mixture with a specific gravity of 1,994 kg/m3 with a compressive strength of 39.12 MPa. From theabove analysis, it can be concluded that the more Bottom Ash used can reduce the specific gravity andstrength of the concrete. Meanwhile, the use of 30% Bottom Ash can increase the compressive strengthcompared to without using Bottom Ash by 29.53 MPa with a specific gravity of 2162 kg/m3.
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