Analysis of The Mechanical Properties of Concrete Based on Fly Ash and Palm Oil Clinkers

Abstract

Concrete is the result of a mixture of cement, aggregate and water. Under certain conditions, the concrete mixture can be added with additives and admixture to get the concrete as needed. Cement is the most important material in the manufacture of conventional concrete. When cement is produced, the same amount of CO2 will also be generated as a side effect and pollute the atmosphere. Fly ash as an alternative to cement will be introduced as an alternative concrete material to reduce the use of cement in the concrete mix. In addition to the use of charcoal fly ash as a partial substitute for cement, this study also uses palm oil clinkers as a substitute for fine aggregate as much as 20%. This replacement material is an industrial waste which has the main content of silica and alumina which is similar to the main material for forming concrete. In addition, the use of these two materials also aims to reduce the exploration of the use of natural materials. This research introduces 3 kinds of concrete composition. The grouping is based on the ratio of fly ash and cement used, namely (60%:40%), (70%:30%) and (80%:20%). The test object used is a concrete cylinder with a diameter of 150 mm and a height of 300 mm. Tests were carried out at the age of 28 days of concrete. The compressive strength test showed that the best concrete was produced from the combination of the addition of 60% fly ash of coal aged 28 days, which was 4.21 MPa.

Mechanical Characteristic and Water Absorption Property of Bio Composite from Sago Starch and Jute Fiber (Boehmeria Nivea) as the filler

“…The development of research bio composite has been very diverse, not only includes products for the needs of building materials, such as particle board, plywood or cement board and other, but has also grown by leaps and bounds in science and bio-plastic or plastic reinforced with cellulose materials, either in the form of products of wood plastic composite (wpc) or injection molded natural fiber polymer. Plastic products plays an important role in the development of the automotive industry that are environmentally friendly [16]. Bio-based composites can be generated by preparing a matrix of carbohydrates or proteins, which are extracted either from plant or animal sources.…”

Investigation of normal concrete properties with the addition of micro reinforcement

“…The crack patterns that occurred in this study were shear and columnar crack patterns. All in all, it can be seen that the compressive strength of concrete has increased, although it is still below the normal concrete compressive strength, it is getting bigger and bigger than f'c 25Mpa, and can be used as structural concrete (21). This shows that the more Micro Reinforced rattan is added, the less work ability of the concrete mixture.…”

“…The tensile strength of split concrete has increased by 22.17% from normal concrete. For the bending strength of concrete blocks experienced an increase of 9.69% from normal concrete (21). Rattan was chosen to be developed because in general rattan has good natural strength, is flexible and lightweight in dry conditions.…”