UHPC超高性能混凝土作為一種新型的水泥基復合材料，被稱為不開裂的混凝土，它一般采用高強硅酸鹽水泥、硅灰、石英粉、細硅砂、減水劑、有機纖維等多種高強度韌性材料經過特殊工藝配置而成的高性能纖維增強混凝土。最初被應用于廣東英德北江四橋，使橋梁結構有效避免連續箱梁橋自重過大、主跨過度大的梁體開裂等難題。

UHPC ultra-high performance concrete, as a new type of cement-based composite material, is known as non cracking concrete. It is generally made of high-strength Portland cement, silica fume, quartz powder, fine silica sand, water reducing agent, organic fiber and other high-strength toughness materials through special process configuration to form high-performance fiber reinforced concrete. Originally applied to the Beijiang Fourth Bridge in Yingde, Guangdong, the bridge structure effectively avoids problems such as excessive self weight and cracking of the main span of continuous box girder bridges.

除應用于大跨徑橋梁箱梁橋面鋪裝外，還被廣泛應用于建筑結構加固、工程搶修，例如港口碼頭的防腐蝕防水構筑物的保護以及石油海洋行業中鋼結構建筑的保護層防護。UHPC超高性能混凝土之所以被稱為不開裂的混凝土是因為它在實際應用中可以有效的防止結構出現裂縫，從材料本身來說，孔隙率低，不含粗骨料，通過提高材料內分子的細度和活性，讓它在使用過程中的高韌性得以發揮，相比較于普通的混凝土來說更不容易產生開裂的現象。材料經過700次抗凍融實驗后仍然完好，抗折強度能是普通混凝土的10倍以上，抗折強度高，也是使材料柔韌性更好的一大因素。

In addition to being used for the pavement of large-span bridge beams and box girder decks, it is also widely used for building structural reinforcement and engineering repair, such as the protection of anti-corrosion and waterproof structures in port terminals and the protection layer protection of steel structure buildings in the oil and marine industry. The reason why UHPC ultra-high performance concrete is called non cracking concrete is because it can effectively prevent structural cracks in practical applications. From the material itself, the porosity is low, and it does not contain coarse aggregates. By improving the fineness and activity of molecules in the material, its high toughness can be exerted during use, making it less prone to cracking compared to ordinary concrete. After 700 freeze-thaw tests, the material remains intact, with a flexural strength that is more than 10 times that of ordinary concrete. Its high flexural strength is also a major factor in improving the flexibility of the material.

其次這種超高性能混凝土的抗壓強度也比普通混凝土的抗壓強度要高，甚至比常見的生鐵的抗壓強度還要高，普通混凝土的抗壓強度在15到30兆帕左右，超高性能混凝土的抗壓強度超高性能混凝土的抗壓強度一般在150兆帕左右，是普通混凝土抗壓強度的10倍以上。

Secondly, the compressive strength of this ultra-high performance concrete is also higher than that of ordinary concrete, and even higher than the compressive strength of common pig iron. The compressive strength of ordinary concrete is around 15 to 30 megapascals, while the compressive strength of ultra-high performance concrete is generally around 150 megapascals, which is more than 10 times the compressive strength of ordinary concrete.

再有這種超高性能混凝土材料本身自重輕，是混凝土建筑結構的三分之一，自重的減少能夠有效的降低靜荷載，更利于建造那種細長型的建筑物，例如在預應力橋梁上應用這種混凝土，能夠有效降低預應力鋼筋的使用率，降低材料成本，節省工程項目費用。

Furthermore, this ultra-high performance concrete material itself has a light weight, which is one-third of the weight of concrete building structures. The reduction in weight can effectively reduce static loads, making it more conducive to building slender buildings. For example, applying this type of concrete to prestressed bridges can effectively reduce the usage rate of prestressed steel bars, reduce material costs, and save project costs.

因此超高性能混凝土被廣泛應用于建筑、橋梁、隧道、水港碼頭和道路等多個領域。例如，裝配式建筑中，UHPC幕墻、圍墻、集成屋；水庫大壩護坡工程；高速路防撞墻；橋梁鋪裝；地鐵景觀裝飾等。UHPC超高性能混凝土應用如此廣泛那么它如何施工呢？材料攪拌：超高性能混凝土在攪拌時應按照廠家推薦的加水量進行攪拌，宜采用臥軸、行星式或逆流強制式攪拌機攪拌，攪拌時間不得少于2min，也不得超過3min。

Therefore, ultra-high performance concrete is widely used in various fields such as construction, bridges, tunnels, water ports, docks, and roads. For example, in prefabricated buildings, UHPC curtain walls, walls, and integrated houses; Reservoir dam slope protection project; Highway collision walls; Bridge paving; Subway landscape decoration, etc. How to construct UHPC ultra-high performance concrete when it is widely used? Material mixing: Ultra high performance concrete should be mixed according to the recommended amount of water by the manufacturer during mixing. It is recommended to use a horizontal axis, planetary or counter flow forced mixer for mixing, and the mixing time should not be less than 2 minutes or more than 3 minutes.

材料澆筑：材料入模前應根據設計要求用專業的設備檢測超高性能混凝土的相關數值，合格后方可入模澆筑，澆筑時溫度最好控制在5~30℃，避免高溫或低溫，溫差較大的天氣狀況下澆筑；澆筑時自由落體高度不能大于2米，大于2米時，應采用溜槽、串聯關油缸、漏斗等輔助輸送材料，不能出現分層和離析的現象；澆筑時應分層連續進行，間隔時間不得超過90分鐘，不得隨意留施工縫；振動施工：可使用振動設備如插入式振動棒、附加平面振動器、表面平面振動器等可用于振動超高性能混凝土。養護說明：不僅僅是需要及時澆水保濕，還要注意控制混凝土的溫度變化。在濕養護的同時，應保證混凝土表面溫度與內部溫度和所接觸的大氣溫度之間不出現過大差異。

Material pouring: Before the material is poured into the mold, professional equipment should be used to test the relevant values of ultra-high performance concrete according to the design requirements. Only after passing the test can it be poured into the mold. It is best to control the temperature during pouring at 5-30 ℃ to avoid pouring in high or low temperature weather conditions with large temperature differences; When pouring, the free fall height should not exceed 2 meters. When it exceeds 2 meters, auxiliary conveying materials such as chutes, series closing oil cylinders, funnels, etc. should be used to prevent layering and segregation; During pouring, it should be carried out layer by layer continuously, with an interval of no more than 90 minutes, and construction joints should not be left arbitrarily; Vibration construction: Vibration equipment such as plug-in vibration rods, additional plane vibrators, surface plane vibrators, etc. can be used to vibrate ultra-high performance concrete. Maintenance instructions: It is not only necessary to water and moisturize the concrete in a timely manner, but also to pay attention to controlling the temperature changes of the concrete. During wet curing, it should be ensured that there is no significant difference between the surface temperature of the concrete and the internal temperature, as well as the atmospheric temperature in contact.