LITERATURE REVIEW OF THE EFFECTS OF WATER AND CEMENT (W/C) RATIOS AND ADDITION OF NANOSILICA AND SILICA FUME ON THE COMPRESSIVE STRENGTH OF MORTAR

• Main Author: Firmansyah Sadono, Daffa
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/70534
• Institution: Institut Teknologi Bandung

A building strong foundation is influenced by the quality of the concrete. However, concrete have so many variables that have to be investigated. In addition, many high strength concrete researchers from ITB bachelor of materials engineering have failed to produce concrete samples qualified as high-strength concrete. Therefore, the mortar samples was first investigated to assess the potential of strength improvement by adding mineral admixture, namely nanosilica and silica fume. Through literature review from several journals discussed the compressive strength of mortars with the addition of its two mineral admixtures, a correlation between journals is made through graphic images. In this study, data obtained that the water and cement (w/c) ratio of 0,25 in mortar sample without mineral admixture provided the highest compressive strength. Then, the addition of 3, 5, and 10% nanosilica and silica fume respectively to the mortars provided higher compressive strength than mortars without the two mineral admixtures at 28 days of mortars age. Between nanosilica and silica fume, mortar with nanosilica provided a higher compressive strength improvement than silica fume in all percent of mineral admixture addition. This was happened because of the higher silica content of nanosilica, and also smaller and denser nanosilica grain. In addition, from XRD analysis and SEM morphology, it can be seen that the porosity of mortar samples with nanosilica addition was less than mortar samples with silica fume addition.