Abstract
This research aims to make ultra high strength Reactive Powder Concrete (RPC) with marble powder as one of the components. The use of marble powder can increase Calcium Silicate Hydrate (CSH) and the strength of RPC. The research method used to achieve the objectives is experimental and divided into two steps. The first step is the characterization of a marble and micro silica powder mixture. Stoichiometry calculations are performed to determine the composition of the mixture. The test sample is made in the form of pellets consisting of a mixture of marble powder, micro silica, and water. The water content used is at 30% - 50%. Maintenance is carried out by immersion in water with the temperature of 20oC for 27 days and in steam at temperatures 200oC, 250oC, and 300oC with 2 atm pressure for 4 hours. Material characterization is carried out using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The second step in this research is the RPC compressive strength test. The test sample is made in the form of a cube measuring 50 x 50 x 50 mm. This cube is a mixture of water, cement, micro silica, marble powder, sand, and superplasticizer. Material composition is arranged based on the characterization of the sample pellet test, and maintenance of the sample cube test is carried out as in the sample pellet test.
Highlights
The marble is a rock that resulted from a metamorphosis or a process made from limestone which contains carbonate
This spectrum represents amorphous material, meaning that the silica fume of the atoms is not regularly arranged [4]. This amorphous material is very reactive to calcium hydroxide Ca(OH)2 at room temperature, so it is widely used in the concrete industry
The conclusion obtained from the experimental study is that the addition of marble powder to reactive powder concrete (RPC) can increase the amount of calcium silicate hydrated (CSH)
Summary
The marble is a rock that resulted from a metamorphosis or a process made from limestone which contains carbonate. As a result of recrystallization of the structure from which the rock originates, it forms a new texture and grain regularity. Indonesian marble is estimated to be around 30-60 million years old. In Indonesia, the usage of marble is quite widespread. The use of marble can be categorized into two motifs: namely ordinario and staturio. Ordinario marble is usually used for manufacturing baths, tables, and walls, while staturio is often used for sculpture
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