UHPC超高性能混凝土作為一種新型的水泥基復(fù)合材料奠宜，被稱為不開裂的混凝土哗讥，它一般采用高強硅酸鹽水泥嚷那、硅灰、石英粉忌栅、細硅砂车酣、減水劑、有機纖維等多種高強度韌性材料經(jīng)過特殊工藝配置而成的高性能纖維增強混凝土索绪。最初被應(yīng)用于廣東英德北江四橋湖员，使橋梁結(jié)構(gòu)有效避免連續(xù)箱梁橋自重過大、主跨過度大的梁體開裂等難題瑞驱。

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(yīng)用于大跨徑橋梁箱梁橋面鋪裝外娘摔，還被廣泛應(yīng)用于建筑結(jié)構(gòu)加固、工程搶修唤反，例如港口碼頭的防腐蝕防水構(gòu)筑物的保護以及石油海洋行業(yè)中鋼結(jié)構(gòu)建筑的保護層防護凳寺。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(yīng)用中可以有效的防止結(jié)構(gòu)出現(xiàn)裂縫，從材料本身來說旧搔，孔隙率低旁核，不含粗骨料，通過提高材料內(nèi)分子的細度和活性仿扩，讓它在使用過程中的高韌性得以發(fā)揮极求，相比較于普通的混凝土來說更不容易產(chǎn)生開裂的現(xiàn)象。材料經(jīng)過700次抗凍融實驗后仍然完好种鳖，抗折強度能是普通混凝土的10倍以上惹你，抗折強度高，也是使材料柔韌性更好的一大因素哈滥。

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糊扑，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30兆帕左右喷总，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150兆帕左右樟闽，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洽腊，是混凝土建筑結(jié)構(gòu)的三分之一褒醒，自重的減少能夠有效的降低靜荷載藕各，更利于建造那種細長型的建筑物池摧，例如在預(yù)應(yīng)力橋梁上應(yīng)用這種混凝土焦除，能夠有效降低預(yù)應(yīng)力鋼筋的使用率，降低材料成本作彤，節(jié)省工程項目費用膘魄。

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(yīng)用于建筑、橋梁竭讳、隧道创葡、水港碼頭和道路等多個領(lǐng)域。例如绢慢，裝配式建筑中灿渴，UHPC幕墻、圍墻胰舆、集成屋骚露；水庫大壩護坡工程；高速路防撞墻缚窿；橋梁鋪裝棘幸；地鐵景觀裝飾等。UHPC超高性能混凝土應(yīng)用如此廣泛那么它如何施工呢妨舟？材料攪拌：超高性能混凝土在攪拌時應(yīng)按照廠家推薦的加水量進行攪拌问乌，宜采用臥軸、行星式或逆流強制式攪拌機攪拌邦叶，攪拌時間不得少于2min寂齐，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(yīng)根據(jù)設(shè)計要求用專業(yè)的設(shè)備檢測超高性能混凝土的相關(guān)數(shù)值尺笼，合格后方可入模澆筑肃逐，澆筑時溫度最好控制在5~30℃，避免高溫或低溫宇颊，溫差較大的天氣狀況下澆筑撬替；澆筑時自由落體高度不能大于2米，大于2米時传悍，應(yīng)采用溜槽梦柬、串聯(lián)關(guān)油缸、漏斗等輔助輸送材料幻狈，不能出現(xiàn)分層和離析的現(xiàn)象磺送；澆筑時應(yīng)分層連續(xù)進行，間隔時間不得超過90分鐘灿意，不得隨意留施工縫估灿；振動施工：可使用振動設(shè)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馅袁。養(yǎng)護說明：不僅僅是需要及時澆水保濕域慷，還要注意控制混凝土的溫度變化。在濕養(yǎng)護的同時汗销，應(yīng)保證混凝土表面溫度與內(nèi)部溫度和所接觸的大氣溫度之間不出現(xiàn)過大差異犹褒。

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.