2 results about "Aggregate structure" patented technology

This invention relates to a composite mineral-modified polyethylene agricultural mulch film and its preparation method. The agricultural mulch film comprises a polyethylene matrix resin and a composite mineral filler dispersed therein. The composite mineral filler is composed of 27%~33% wollastonite, 18%~22% attapulgite, 27%~33% tourmaline, and 18%~22% hexagonalite, and undergoes electromagnetic oscillation physical activation treatment to achieve a specific surface area ≥250m² / g, a particle size ≤2μm, and the formation of hydroxyl active sites on the surface. This invention also discloses the preparation method and its dual functions of degradation and soil improvement. The agricultural mulch film has a tensile strength ≥18MPa, an elongation at break ≥400%, a biodegradation rate ≥70% after 6 months, a far-infrared emissivity ≥0.90, and a negative ion release ≥1200 ions / cm³. After 6~9 months of field use, it disintegrates, and the residual minerals continuously regulate soil pH, release trace elements, and improve the aggregate structure, achieving a virtuous cycle of mulch film degradation and soil improvement.

This invention provides a method and experimental apparatus for inverting and constructing the structure of concrete aggregates, belonging to the field of concrete testing technology. This method and apparatus can obtain the true spatial position and orientation of target aggregates within concrete, achieving three-dimensional reconstruction of key aggregates. Based on the reconstruction results, a concrete-aggregate three-dimensional structural model consistent with the specimen is simultaneously established in the numerical model. Without damaging the specimen structure, the large aggregates within the concrete specimen are precisely located, and their spatial information is used for three-dimensional structural inversion and numerical modeling. This technical solution achieves a high degree of consistency between experimental results and theoretical analysis and numerical simulation, meeting the engineering needs of concrete fracture mechanism research and complex structural performance evaluation.