Concrete structures exposed to moisture and aggressive environmental conditions often experience durability deterioration and reduction in mechanical performance due to water ingress and pore connectivity. This study experimentally investigated the influence of waterproofing admixtures on the flexural performance of concrete. Three waterproofing additives, one with a brand name CMC waterproof additive containing mainly Sodium Carboxymethyl Cellulose, another with a brand name Waterseal containing mainly Calcium Stearate and Sodium Stearate and the next with a brand name JK waterproof.....

Keywords: Flexural strength, waterproof additives, waterproof concrete, flexural performance, water-resistant concrete.

Soil is the basis of human survival. Scientific classification of soil system and rational use of soil are of great significance to the development of agriculture. Miyi County is a large agricultural county with agriculture, forestry, animal husbandry and fishery as its primary industry. The total planting area of crops is 25 657 hectares. There is no study on Soil Taxonomy in Panxi National Strategic Resources Innovation and Development Pilot Area. Therefore, the study of Soil Taxonomy in Miyi County of Panzhihua City will make up for this gap. Based on the school-level scientific research project, this paper studies the soil taxonomy of Panlian Town, Miyi County, Panzhihua City.......

Keywords: Systematic Classification， Soil Composition Water Content， Miyi County.

The paper presents an innovative double-sided LED signage panel designed to provide uniform illumination with low energy consumption and a compact structure. The proposed solution uses a sandwich-type optical assembly with a single COB LED strip positioned on the edge of a central Plexiglas light guide, ensuring efficient light distribution on both sides. Compared with conventional systems, it offers improved reliability, reduced thickness, and simplified maintenance. The study also evaluates LED lifespan, demonstrating that operating time and temperature have a much greater impact on degradation than daily start-stop cycles. Finally, it highlights the benefits of digitalized certification processes through automation and artificial intelligence, improving efficiency and reducing administrative burden.

Keywords: Signage Panel certification, LED lifespan, Reliability, Uniform illumination.