山内工業 List of Products and Services

We handle the concrete modifier 'CS-21 Series' from Aston Corporation. CS-21 penetrates the voids in concrete and reacts with cement components to create a dense structure. It was born out of the ingenuity of sites that wish to completely stop water seeping out of concrete. Since then, it has undergone continuous improvements aimed at enhancing durability and has been developed to meet various needs, always delivering results on-site alongside its technical capabilities. 【Features】 ■ Penetrates and fills the solid content necessary for the voids in concrete ■ Continuously reacts with newly generated voids after application, filling them with quality and technology ■ Reacts and fills even deteriorated concrete ■ Enables water stoppage in fine cracks that are leaking *For more details, please download the PDF or feel free to contact us.

• Concrete admixture

"CS-21" is a concrete modification agent that penetrates hardened concrete through application, generating stable reaction products (CSH-type crystals) with calcium components in the concrete to fill voids. Additionally, the unreacted main components dissolve upon moisture supply even after drying and solidification, producing reaction products that fill newly occurring fine cracks and other voids after construction. Through these reactions, the voids in the surface layer, including deep cracks, are densified, suppressing the intrusion of water and various deterioration factors over the long term. [Features] ■ Improved durability of the structure as a waterproof body ■ Freedom in design with minimal constraints ■ Significant reduction in construction time ■ Easy management of minimal aging deterioration ■ Excellent environmental performance and high safety, etc. *For more details, please download the PDF or feel free to contact us.

• Concrete admixture

"CS-21 Builder" is a two-component reactive silicate-based surface impregnation material that is used by mixing a main agent with an additive primarily composed of calcium hydroxide, which is often lacking in existing concrete. It maintains a liquid state for a certain period after mixing, gelifying and remaining within the penetrated voids. The generation of reaction products continues, filling newly formed fine cracks and other voids, suppressing the intrusion of deterioration factors, and contributing to increased longevity. 【Features】 ■ Forced reaction promotion ■ Shortened construction period ■ Particularly effective for carbonated concrete ■ Cost reduction *For more details, please download the PDF or feel free to contact us.

• Concrete admixture