Obtaining High-strength Concrete Using Local Microdispersed Additives

ანოტაცია

The article discusses modern approaches to producing high-strength concrete using local microdispersed additives. It examines the principles of modifying the composite structure of concrete and the influence of microsilica, microclay, and metakaolin on the rheological and physical properties of the mixture. The research subject is the effectiveness of silicomanganese dust from the Zestafoni Ferroalloy Plant as a micro-additive on concrete strength. Results of chemical and physical-technical analysis confirm that this residue contains a low amount of active SiO2​ and does not provide the required concrete strength. Comparative analysis shows that foreign microsilica with high silicon content significantly increases concrete density, strength, and corrosion resistance. Additionally, the study explores the possibility of using cement kiln dust which, in combination with superplasticizers, contributes to raising the concrete class and alleviating ecological problems.

 Keywords: Microsilica; silicomanganese dust; micro-additives; concrete modification; local raw materials.

Introduction.

One of the most decisive and influential factors in the ongoing development of modern concrete technology is the meticulous processing and application of the scientific foundations regarding concrete modification. Currently, one of the most prevalent and effective methods for modifying the internal structure of composite building materials involves the strategic introduction of highly active additives into their basic composition to enhance performance. These mineral additives can be derived from either natural or artificial origins and typically contain various silicate minerals. Depending on their source and processing, these minerals may exist in several physical states, including crystalline, fine-crystalline, colloidal, or amorphous states. Within this category of transformative materials, microsilica, microclay, and metakaolin stand out as the primary and most significant types of additives used to achieve these structural improvements.

The inclusion of these specific mineral additives in a concrete composition significantly helps to maintain the flowability of the mixture for a critical period during the construction process. This retention of flow is exceptionally important in contemporary concrete technology, particularly for the analysis shows that foreign microsilica with high silicon content significantly increases concrete density, strength, and corrosion resistance. Additionally, the study explores the possibility of using cement kiln dust which, in combination with superplasticizers, contributes to raising the concrete class and alleviating ecological problems.