光和商事株式会社 List of Products and Services

The "BI Block" is a self-supporting large block used for soil retention and slope protection in road construction, riverbank protection, and other applications. It is a large block of the dry-stacked type that eliminates the need for core concrete, improving work efficiency and shortening construction periods. Additionally, because it is a large block, it can be installed by ordinary workers without the need for stonemasons. 【Features】 ■ Dry-stacked type large block (1.125m² per unit) ■ Excellent workability as there is no need to pour core concrete ■ Despite being a large block, it is completely self-supporting, allowing for shortened construction periods ■ Being a large block, it can be installed by ordinary workers without the need for stonemasons ■ Equipped with protrusions that have sufficient performance against soil pressure *For more details, please download the PDF or feel free to contact us. 【Service Area】Hiroshima Prefecture, Okayama Prefecture, Yamaguchi Prefecture, Shimane Prefecture, Tottori Prefecture

• Stacking blocks

The "Skeleton Disaster Prevention Coating" is a method that achieves a level of transparency allowing for visual confirmation of cracks and surface peeling of the structure by impregnating the base material, MBS Clear Guard, with a glass continuous fiber sheet that has excellent strength. After application, it becomes possible to visually inspect the surface of the structure, enabling pinpoint detection of areas where deformation has occurred, allowing for localized repairs. Additionally, the performance of the surface protection method has been verified through rigorous testing by third-party organizations in accordance with the necessary standards for anti-peeling performance. 【Features】 ■ The concrete surface is see-through ■ The fibers are soft ■ Simple work processes and materials used ■ Prolongs the lifespan of structures ■ Water vapor permeability ■ Repairability *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

The "IPH method" replaces the air present inside the concrete and the injected resin, allowing the resin to diffuse radially from the drilled holes, thereby filling even the finest cracks at the ends. This method not only enhances the adhesion strength between rebar and concrete but also provides a high anti-corrosion effect, leading to improved durability. It has received technical evaluation from the Japan Society of Civil Engineers. Moreover, structures constructed using this method can extend the intervals between subsequent repairs. Since the deteriorated areas are repaired and injected without being chipped away, the amount of demolition waste is reduced, resulting in cost savings. 【Features】 ■ High-density filling ■ Rebar anti-corrosion and neutralization suppression ■ Strength recovery and durability improvement ■ Enhanced economic efficiency and environmental measures *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

The "Danby Method" is a technique for rehabilitating damaged or aging pipes in sewers, agricultural water systems, and sluices without excavation. A rigid PVC strip is fed into the existing pipe from a manhole, and while being spirally wound along the inner surface of the pipe, adjacent strips are joined using fitting components to form a continuous pipe body. Subsequently, using spacers installed above the existing pipe for injecting filling material, the gaps between the strip pipe and the existing pipe are filled with the material, resulting in a composite pipe integrated with the existing pipe, exhibiting high strength and water tightness. 【Features】 ■ Can be constructed only within the work zone on the road without excavation ■ Forms a new pipeline on the inner surface of the existing pipe ■ Improved chemical resistance and abrasion resistance due to the formation of a rigid PVC pipeline ■ Enhanced load capacity, seismic resistance, and flow capacity as a composite pipe integrated with the existing pipe *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

This document introduces the "Circle Cutter Method." It provides detailed information using diagrams and images about the overview and features, non-shrink mortar reinforcement layers, high-strength adhesive internal screw anchors, and more. Additionally, it includes information on construction procedures and examples, so please take a moment to read it. [Contents (Excerpt)] ■ Overview of the Circle Cutter Method ■ Features of the Circle Cutter Method ■ Paving cutting machinery for the Circle Cutter Method ■ Road restoration structure of the Circle Cutter Method ■ Subbase materials *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

The "PA Joint" is a buried expansion device that does not require secondary water stopping and possesses seismic resistance due to its ability to expand and contract in all directions, 360 degrees. It exhibits better performance against temperature fluctuations and can accommodate a maximum expansion of up to 100mm. Additionally, the ground cover can be constructed with the same material, allowing for seamless water stopping. 【Features】 ■ Wheel tracking test: 52,500 rotations/mm ■ Durability performance several times greater than the heavy traffic standard value of 3,000 rotations/mm ■ No need for secondary water stopping; also achieves seismic resistance ■ Ground cover can also be constructed with the same material ■ Exhibits the same expansion and contraction performance in all 360 degrees *For more details, please refer to the PDF document or feel free to contact us.

• Slope protection material

The "Concrete Keeper Series" is an inorganic lithium-based mixed type concrete impregnation material. It features "Concrete Keeper," which primarily consists of lithium silicate combined with silane, and the topcoat material "Concrete Keeper neo." It is suitable for concrete repair and deterioration prevention. 【Features】 ■ Inorganic lithium-based mixed type ■ Concrete repair and deterioration prevention ■ Two main components that block concrete deterioration in a double action *For more details, please refer to the PDF document or feel free to contact us.

• Reinforcement and repair materials

"GeoBest" is a weakly alkaline soil pavement solidifying agent primarily composed of magnesium oxide that does not use cement. Japanese soil can be broadly classified into five types, and this product can solidify all types of soil. Additionally, acute toxicity tests on killifish and rats have been conducted regarding its components and pH value, confirming its safety. 【Features】 ■ Environmentally friendly ■ Weed prevention effect ■ Excellent solidification performance ■ High aesthetic quality that preserves the texture of the soil ■ Excellent walkability due to moderate elasticity *For more details, please refer to the PDF materials or feel free to contact us.

• Paving Materials

"Super Shield" is a high-performance concrete waterproofing and protective material in a colloidal solution type, primarily composed of sodium silicate and potassium silicate. It offers new technology for extending the lifespan of concrete while reducing maintenance costs, all while protecting the natural environment. Compared to water-soluble concrete protective materials and water-repellent concrete protective materials based on silicates, it has excellent durability and, through high-function self-repair, continues to protect concrete from various forms of deterioration for a long time, firmly and stably. 【Performance Characteristics】 ■ Suppression of carbonation ■ Suppression of salt damage ■ Suppression of freeze damage ■ Suppression of rebar corrosion ■ Suppression of alkali-aggregate reaction ■ NETIS Registration No. QS-150019-VE *For more details, please refer to the PDF document or feel free to contact us.

• Slope protection material

The "Hinodakutairu Joint α" features a bolt fastening structure that significantly reduces installation time during replacement, allowing for efficient replacement. The main body is made of Hinodakutairu cast iron, which possesses strength and ductility considering the loads and impacts from vehicle traffic. The semi-circular shape helps to distribute part of the vehicle load, thereby reducing the occurrence of asphalt pavement sinking and ruts. 【Features】 ■ Easy to replace bolt fastening structure ■ Product shape that reduces step differences during vehicle traffic ■ Main body made of Hinodakutairu cast iron with excellent material properties ■ Slip-resistant structure that allows for safe travel even in rainy conditions ■ Water-stopping rubber with excellent deformation followability *For more details, please refer to the PDF document or feel free to contact us.

• Bridge Materials

The "Metal Road Construction Method" is a three-dimensional frame prefabricated bridge where the piles, cross beams, and main beams are rigidly connected at the nodal points. Due to its multi-column three-dimensional frame structure, it has excellent seismic resistance and can be applied to existing roads. It is easy to transport and install components even in narrow road construction in mountainous areas, making it highly efficient in terms of construction. It is composed of short and lightweight prefabricated components, which shortens the on-site construction period. Additionally, it does not require large-scale excavation or backfilling, resulting in minimal generation of surplus soil and waste. [Features] ■ Strong against earthquakes ■ Easy to construct ■ Short construction period ■ Maintains existing roads ■ Abundant track record *For more details, please refer to the PDF materials or feel free to contact us.

• Bridge Construction

This catalog introduces the "soundproof products" manufactured by Shinko Kenzai Kogyo Co., Ltd., which are handled by Kowa Shoji. It features various products, including the sound-absorbing panel "Eco-Qon" made from fine porous aluminum foil, the "translucent panel" standardized based on specifications from NEXCO companies, and the "Silence Keeper" with a simple and sharp design. Please make use of this when selecting products. [Contents (excerpt)] ■ Eco-Qon ■ Unified Type ■ Translucent Panel ■ Silence Keeper ■ Related Products *For more details, please refer to the PDF materials or feel free to contact us.

• Soundproofing panels

The "GR Series" is a product that not only meets the drainage performance required of grating but also possesses long-term durability and high safety as a structure installed on the road. Furthermore, it takes into consideration the workability for maintenance tasks such as inspection and cleaning, and it excels in economic efficiency from a long-term perspective. We offer a lineup that includes "GR-L" for L-shaped rainwater catch basins, "GR-U" with a cast iron integrated structure, and "GR-V" for longitudinal ditches. 【Features】 ■ Drainage performance ■ Long-term durability ■ High safety ■ Consideration for workability in maintenance tasks such as inspection and cleaning ■ Excellent economic efficiency from a long-term perspective *For more details, please refer to the PDF document or feel free to contact us.

• Grating

"Re-Flex" is a concrete night reflective paint that enhances driver visibility and improves driving safety by being applied to concrete surfaces. It comes in a color that does not compromise the appearance of concrete and reflects light brightly in dark places and at night. It reflects light only in the direction of the light source, even when illuminated from various angles (retroreflective). After easily cleaning existing concrete, it can be painted without special surface preparation. Additionally, it does not require a primer or topcoat, and retains a strong film after air drying at room temperature. 【Features】 - A color that does not compromise the appearance of concrete - Brightly reflects light in dark places and at night - Does not require a primer or topcoat, retaining a strong film after air drying at room temperature - Coats the concrete surface with a special resin emulsion - Blocks deterioration factors *For more details, please refer to the PDF document or feel free to contact us.

• Luminous paint

The "Stamp Method" involves coloring the surface of concrete with a color hardener after pouring the ready-mixed concrete, and before the concrete hardens, pressing a "pattern mat" with natural stone, brick, or wood patterns to create designs. By embossing, a textured pattern is formed on the concrete surface, resulting in a natural finish. Additionally, because it is integrated with the concrete, it does not peel or become uneven, nor does it allow weeds to grow from the joints, making it highly durable. 【Features】 ■ Finishes with a natural texture ■ Highly durable due to integration with concrete ■ Natural shading and three-dimensional effect from the release powder ■ A lineup of 12 different pattern variations ■ Resistant to tire marks and has dirt-repellent properties *For more details, please refer to the PDF document or feel free to contact us.

• Concrete construction

This document introduces "anti-slip construction using the Astes method." To reduce the number of preventable slip and fall accidents, we propose anti-slip construction on road surfaces using the "sandblasting method" and "SREM method," aiming to create a community where everyone can live with peace of mind. 【Contents (excerpt)】 ■ Removal of slip causes with sandblasting ■ Long-lasting anti-slip effect from a single application ■ Safety measured in numbers ■ Equipment specifications ■ Collection of construction examples, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Special Construction Method

The "Strand Sheet Method" is a repair and reinforcement technique that processes FRP strands, which are impregnated and cured with resin, into sheet form and adheres them to the surface of concrete structures using a special adhesive. The special adhesive serves as both a primer and a leveling material, and since there is no need to impregnate the sheet with resin, the construction period is shortened and costs are reduced. This method achieves reinforcement effects that are equal to or greater than those of conventional continuous fiber sheet bonding methods. 【Features】 ■ Short construction period and low cost ■ Simple and high quality ■ Significant reinforcement effect ■ Good construction environment ■ Excellent workability without the need for resin impregnation or degassing *For more details, please refer to the PDF materials or feel free to contact us.

• Reinforcement and repair materials

The construction method involves reinforcing a green panel made of FRP in a lattice shape, which is fixed at the head with reinforcement materials, utilizing the tensile strength of the reinforcement to prevent slope failure. By spraying soil or similar materials onto this part, full greening, which was difficult with conventional slope works, becomes possible. 【Features】 ■ NETIS Registration No. CG-010007-V ■ Lightweight at 16.8 kg due to being made of FRP ■ Easy to install ■ Significantly reduces construction time ■ High opening ratio due to lattice shape, enabling full greening *For more details, please refer to the PDF materials or feel free to contact us.

• Reinforcement and repair materials

The "Galva Shield Method" is a special product that wraps zinc in a special mortar and utilizes the potential difference of metals to prevent rusting of rebar. It can be installed in both maintenance and repair of concrete structures (such as salt damage, carbonation, and macrocell corrosion) as well as new structures, offering a wide variety of options based on LCC and the presence of inherent salts. Additionally, the "Renderock Series" is used as a cross-section repair material. 【Features】 ■ NETIS Registration No. CB-020037-VE ■ Utilizes the potential difference of metals to prevent rusting of rebar ■ Can be installed in both maintenance and repair of concrete structures and new structures ■ A wide variety of options available based on LCC and the presence of inherent salts *For more details, please refer to the PDF materials or feel free to contact us.

• Sewerage facilities

This document contains information about the "components of the drop shaft." The drop shaft construction method is a groundbreaking technique developed in collaboration with the Japan Sewerage New Technology Promotion Organization, which allows for efficient treatment of high drop heights. The main features include the reduction of manhole cross-sectional area, improved durability, enhanced maintenance environment, reduced air entrainment in main lines and storage pipes, decreased total costs, shortened construction periods, and improved workability, demonstrating advantages over conventional methods. [Contents] ■ Components of the drop shaft *For more details, please refer to the PDF document or feel free to contact us.*

• Sewerage facilities

The "Borkurei Mat (Bentonite Waterproof Sheet)" is an environmentally friendly waterproof sheet made from natural sodium-type bentonite sourced from Wyoming, USA. It is widely used as a waterproofing material for biotopes, ponds, and waste final disposal sites. Due to its natural material (inorganic), it is expected to provide stable waterproofing performance over the long term, and pinholes are prevented from leaking due to expansion. It can be used as a waterproof layer in various applications such as ponds, final disposal sites, and rivers. 【Features】 ■ Excellent waterproofing properties ■ Semi-permanent durability ■ Damage-resistant self-repairing properties ■ Needle punching to prevent loss and uneven distribution ■ Environmentally friendly natural bentonite *For more details, please refer to the PDF document or feel free to contact us.

• Civil Engineering Sheet

"Aqua Tail 35" is a river structure that complies with the "Ministry of Land, Infrastructure, Transport and Tourism River and Erosion Control Technical Standards," featuring a wall thickness of 35 cm and a simple joint shape. It is designed with the simplification of wall shapes, components, and construction in mind for river and coastal structures. Compared to the previous underwater tail arm "Color Wall Method," it achieves labor and material savings. Additionally, the precasting of wall components eliminates the need for scaffolding, resulting in reduced construction time and overall cost savings. 【Features】 ■ NETIS Registration No. CG-10020-A ■ Increased wall thickness ensures stability against flowing water (suitable for salt damage areas) ■ Use of wide strips reduces the extension of reinforcement materials ■ Improvement in fill layer thickness reduces the total number of compaction cycles (layer thickness from 25 cm to 30 cm) ■ Exceptional stability reduces the need for fine adjustments during construction *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

This is a method ideal for replacing iron covers, characterized by speed, recyclability, and low cost. The weight of the cutter machine is 20 kg, and since it is dry, the asphalt dust generated after cutting the pavement is collected and recycled with a dust collector. By using jigs for square covers, the pavement cutting results in no leftover cutting marks, with the corners enclosed by arcs. Additionally, using recycled materials such as steel slag, traffic can be reopened at each location with cold rapid-hardening pavement materials.

• Special Construction Method

During the installation of sewer connection pipes and public manholes, it is necessary to dig horizontal and vertical holes. However, due to the complex site conditions, the current situation relies heavily on manual labor, making labor-saving measures at the site a pressing issue. The Multi-Mole method mechanizes horizontal pushing and vertical excavation using "TonTon-kun" and "BuruBuru-kun." In addition to being used independently, it also allows for the joining of horizontal and vertical work. The Multi-Mole method significantly improves not only labor-saving but also safety and construction quality.

• Dam construction

"Towards a Circular Society: Easy Eco Activities You Can Do at Home" This is our company's home-use worm composting container. Worm composting utilizes the power of earthworms and microorganisms to ferment and decompose kitchen waste (organic matter) without producing unpleasant odors, creating high-quality compost in the most natural way possible. Kitchen scraps such as peels, damaged parts, and leftovers, which may have an odor, are not "waste" but originally nutritious food and resources. The excrement of earthworms is rich in components such as amino acids, phosphoric acid, nitrogen, calcium, magnesium, minerals, and enzymes, making it ideal for soil improvement. When mixed into the soil, it contributes to the safe and delicious growth of vegetables. "From Waste to Organic Compost" Because they are living creatures, earthworms connect to emotional education and make it enjoyable to continue this practice. The actions of each individual can change the community and the future. For the important children who will carry on the future, why not start a nature-friendly cycle? We will continue to face environmental issues head-on and develop new businesses as a company that is kind to the Earth.

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