Study of performance properties of modified concrete based on polydispersed binding agent for water reclamation construction

To effectively utilize reclaimed land and maintain its fertility, it is necessary to ensure the construction and operation of a comprehensive irrigation system (troughs) with a high degree of durability and reliability throughout the entire service life. This research examines issues related to improving the performance of modified heavy-duty concrete operating under harsh conditions. The objective of this study is to establish the feasibility of controlling the grain size distribution of a cement binder modified with a complex modifier (superplasticizer + polymer + microsilica) by forming a spatially reinforced, fine-crystalline structure of the cement matrix with the highest possible packing density, which is maintained over time. The presence of a microsilica component in the complex modifier promotes a pozzolanic reaction with the formation of chemically stable, low-basic calcium hydrosilicates, which positively impacts the corrosion resistance of concrete. Object of study: heavy-duty concrete based on a polydisperse binder with a complex modifier (superplasticizer + polymer + microsilica), reinforced with basalt fiber for irrigation and drainage construction, specifically irrigation system trays. The following research methods were used in the study: laser granulometry, X-ray phase analysis, electron microscopy, and chemical analysis. Mathematical processing of the obtained experimental data was used to form dense packings of finely dispersed fractions of the clinker component. Research results: new data were obtained that complement theoretical understanding of the structure formation process of heavyduty concrete based on a polydisperse binder with a controlled grain size distribution, combined with a complex modifier and reinforced with basalt fiber. A composition and technological solutions have been developed for producing effective heavy concrete for irrigation and drainage construction with improved performance characteristics: compressive strength – 77.3 MPa; tensile strength in bending – 8.62 MPa; water absorption – 1.9%; water resistance grade – W14; frost resistance F1=600, increased resistance to aggressive environments. 

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