Детальная информация

The demand for lightweight concrete has increased because of its low density, fire resistance and good thermal insulation. Autoclaved aerated concrete (AAC) is the combination of cement, fine-grained sand, lime and water with aluminium powder. This study aims to investigate the influence of adding silica fume (SF) on improving the properties of AAC. The response was studied in terms of testing the mechanical and physical properties including compressive, splitting tensile, flexural strength, density, porosity and coefficient of water absorption. Different mixes have been proposed by incorporating the SF with contents of 10 %, 20 % and 30 % by cement weight, which is compared with the AAC sample that is used in practical applications. The results indicated that there was a significant improvement in the compressive and flexural strength of AAC, which increased by six and three times, respectively, when 30 % of SF was used with an acceptable dry density. Furthermore, the microstructural analysis revealed that SF had a positive effect on the development of calcium silicate hydrate and it can be used in AAC masonry block productions.

• Influence of silica fume addition on enhancing the autoclaved aerated concrete properties
  • 1. Introduction
  • 2. Methods and Materials
    • 2.1. Material Properties for the AAC Mix Design
    • 2.2. Preparation of Samples
    • 2.3. Mechanical and Physical Tests
    • 2.4. Mix design
    • 2.5. Optical microscope observations
  • 3. Results and Discussion
    • 3.1. Compressive Strength
    • 3.2. Tensile Strength
    • 3.3. Flexural Strength
    • 3.4. Bulk Density
    • 3.5. Porosity Measurement
    • 3.6. Coefficient of Water Absorption
    • 3.7. Microstructural analysis
  • 4. Conclusion

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. — Периодичность: 8 раз в год. — Выходит с 2020 г. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — Текст: электронный

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. Т. 17, № 4, 2024. — 1 файл (11,6 Мб). — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — <URL:http://elib.spbstu.ru/dl/2/j25-221.pdf>.