UHPC超高性能混凝土作为一种新型的水泥基复合材料，被称为不开裂的混凝土，它一般采用高强硅酸盐水泥、硅灰、石英粉、细硅砂、减水剂、有机纤维等多种高强度韧性材料经过特殊工艺配置而成的高性能纤维增强混凝土。最初被应用于广东英德北江四桥，使桥梁结构有效避免连续箱梁桥自重过大、主跨过度大的梁体开裂等难题。

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.

除应用于大跨径桥梁箱梁桥面铺装外，还被广泛应用于建筑结构加固、工程抢修，例如港口码头的防腐蚀防水构筑物的保护以及石油海洋行业中钢结构建筑的保护层防护。UHPC超高性能混凝土之所以被称为不开裂的混凝土是因为它在实际应用中可以有效的防止结构出现裂缝，从材料本身来说，孔隙率低，不含粗骨料，通过提高材料内分子的细度和活性，让它在使用过程中的高韧性得以发挥，相比较于普通的混凝土来说更不容易产生开裂的现象。材料经过700次抗冻融实验后仍然完好，抗折强度能是普通混凝土的10倍以上，抗折强度高，也是使材料柔韧性更好的一大因素。

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.

其次这种超高性能混凝土的抗压强度也比普通混凝土的抗压强度要高，甚至比常见的生铁的抗压强度还要高，普通混凝土的抗压强度在15到30兆帕左右，超高性能混凝土的抗压强度超高性能混凝土的抗压强度一般在150兆帕左右，是普通混凝土抗压强度的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.

再有这种超高性能混凝土材料本身自重轻，是混凝土建筑结构的三分之一，自重的减少能够有效的降低静荷载，更利于建造那种细长型的建筑物，例如在预应力桥梁上应用这种混凝土，能够有效降低预应力钢筋的使用率，降低材料成本，节省工程项目费用。

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广泛应用于建筑、桥梁、隧道、水港码头和道路等多个领域。例如，装配式建筑中，UHPC幕墙、围墙、集成屋；水库大坝护坡工程；高速路防撞墙；桥梁铺装；地铁景观装饰等。UHPC超高性能混凝土应用如此广泛那么它如何施工呢？材料搅拌：超高性能混凝土在搅拌时应按照厂家推荐的加水量进行搅拌，宜采用卧轴、行星式或逆流强制式搅拌机搅拌，搅拌时间不得少于2min，也不得超过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.

材料浇筑：材料入模前应根据设计要求用专业的设备检测超高性能混凝土的相关数值，合格后方可入模浇筑，浇筑时温度最好控制在5~30℃，避免高温或低温，温差较大的天气状况下浇筑；浇筑时自由落体高度不能大于2米，大于2米时，应采用溜槽、串联关油缸、漏斗等辅助输送材料，不能出现分层和离析的现象；浇筑时应分层连续进行，间隔时间不得超过90分钟，不得随意留施工缝；振动施工：可使用振动设备如插入式振动棒、附加平面振动器、表面平面振动器等可用于振动超高性能混凝土。养护说明：不仅仅是需要及时浇水保湿，还要注意控制混凝土的温度变化。在湿养护的同时，应保证混凝土表面温度与内部温度和所接触的大气温度之间不出现过大差异。

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.