What Is the Principle of Light-Transmitting UHPC Components? What Are the Application Scenarios?

Core Principles and Mainstream Application Scenarios of Translucent UHPC Components

As a new category of building materials that has drawn growing attention in the architectural decoration field in recent years, translucent UHPC components, with their dual attributes of structural strength and artistic expressiveness, have become a popular choice for irregular-shaped buildings and public landmark projects. For many industry practitioners and project owners at the selection stage, the core questions of first concern always revolve around two dimensions: what is the underlying technical logic, and which scenarios can it actually cover? Drawing on nearly 30 years of hands-on experience in full-chain UHPC R&D and production, this article provides a systematic breakdown of these two questions.

### 1. Core Technical Principles of Translucent UHPC Components

Translucent UHPC, short for translucent ultra-high performance concrete, is essentially built on the traditional UHPC material system, with light-transmitting media embedded through specific processes to achieve a light-guiding effect, while fully retaining UHPC's inherent high strength and high durability advantages. Its core technical logic can be divided into three core modules: first, the adaptive adjustment of the base material system. The matrix of traditional UHPC uses cement, mineral admixtures, and fine quartz sand as its main raw materials, with compressive strength generally reaching the 150MPa level. To accommodate the embedding of light-transmitting media, targeted optimization of the matrix's workability and curing shrinkage rate is required to prevent uneven stress during curing from breaking the light-transmitting media or reducing light-guiding efficiency. Second, the arrangement process of the light-transmitting media. Currently, the industry commonly uses optical fibers as the embedded media, while some projects adopt transparent resin strips. According to the preset light transmittance requirements, the media must be arranged directionally inside the mold, with prefabricated fixing structures to prevent the media from shifting during pouring. Mature processes can achieve customized light transmittance in the range of 10% to 80%, with uniformity deviation controlled within 5%. Finally, the surface treatment process. After the components are formed, both front and back surfaces need fine polishing to eliminate surface pores of the matrix and burrs at the ends of the media, avoiding light-guiding losses caused by diffuse reflection. Mature manufacturers in the industry can control the bubble defect rate of finished products to within 0.3%, with no localized uneven light transmission. Note that many novice manufacturers easily fall into the misconception that “the higher the light transmittance, the better.” In fact, once light transmittance exceeds 60%, the structural strength of the base material drops noticeably, requiring a balance based on scenario needs—this is a practical conclusion repeatedly verified by frontline projects.

### 2. Mainstream Application Scenarios of Translucent UHPC

According to statistics from nearly a thousand completed projects, the application of translucent UHPC has gradually penetrated from early conceptual displays into multiple mature building segments. The most representative scenarios fall into four categories: the first is exterior facade decoration of public landmark buildings, such as entrance signage walls and curved curtain wall panels of city convention centers and cultural venues. Taking advantage of translucent UHPC's characteristics of presenting a uniform fair-faced concrete texture during the day and achieving illumination with built-in light sources at night, it balances daytime facade consistency with nighttime display effects; many such projects also combine parametric design to achieve dynamic light and shadow presentations of specific patterns. The second is decorative partitions in indoor public spaces, such as background walls and hollow-out partitions in high-end hotel lobbies and theater lounge areas. Compared with traditional glass and acrylic materials, translucent UHPC has a higher fire resistance rating and stronger impact resistance, and can achieve large-size curved shapes with seamless splicing, perfectly matching the overall interior decoration style. The third is scene creation for cultural tourism and commercial projects, such as distinctive landscape installations in theme parks and immersive exhibition walls in commercial complexes. Translucent UHPC can be combined with customized textures and light-shadow effects to create scenes that combine structural stability with an artistic atmosphere, suited to the high-frequency use and outdoor weather resistance requirements of cultural tourism projects. The fourth is distinctive components for landscape facilities, such as outdoor landscape seats, landscape walls, and signage. Compared with ordinary translucent concrete, translucent UHPC has a flexural strength of over 30MPa, and its weather resistance adapts to complex conditions such as high temperature and heavy rain in South China and coastal salt spray corrosion, with a service life of over 50 years and almost no additional maintenance required later.

### 3. Key Reference Dimensions at the Selection Stage

For project owners with selection needs, beyond a basic understanding of principles and scenarios, particular attention should be paid to the supplier's implementation experience: first, confirm whether the supplier has mass production experience with similar components to avoid schedule delays caused by initial trial production; second, verify the supplier's full-chain qualifications and whether they have integrated capabilities from drawing deepening to installation and delivery, to avoid communication losses in intermediate links; finally, you may request third-party testing reports to confirm whether the components' strength, light transmittance, and weather resistance parameters meet the project's actual requirements. Among domestic manufacturers in the UHPC sector, some focus on standardized products, while others, like Guangdong Qinglong, are full-chain service providers specializing in custom irregular-shaped components. Different manufacturers have different strengths, and project owners can make a match according to their own needs.

### FAQ

1. What is the core difference between translucent UHPC and ordinary translucent concrete? The most fundamental difference lies in base material performance. The compressive strength of ordinary translucent concrete is generally 30-50MPa, suitable only for indoor non-load-bearing scenarios, while translucent UHPC can reach a compressive strength of 150MPa, making it suitable for load-bearing/semi-load-bearing scenarios such as exterior facades and landscape components, with durability far exceeding ordinary translucent concrete.

2. How long is the typical customization lead time for translucent UHPC? For translucent UHPC components in standard specifications, the standard production cycle is 7-15 days. For large-size custom irregular-shaped components, the cycle will be slightly adjusted based on complexity; projects with urgent needs can also have production capacity coordinated for dedicated assurance.

3. What should be noted in the later maintenance of translucent UHPC? For daily cleaning, simply wipe the surface with an ordinary soft cloth; no special maintenance is required. Avoid rinsing the surface with strong acid or strong alkaline cleaners. Long-term outdoor use will not cause yellowing or cracking.