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钢纤维混凝土较普通混凝土有较好的韧性
[来源:http://www.gangxianwei51.com] [作者:aywl] [日期:17-04-19] [浏览次数:]

钢纤维混凝在道路和桥梁工程方面,主要广泛应用于路面、桥梁、机场跑道等工程中,包括新建及修补工程。钢纤维混凝土较普通混凝土有较好的韧性,抗冲击、抗疲劳性。它可使面层厚度减少,伸缩缝间距加长,使用性能提高,维修费用减低、寿命延长。面层较普通混凝土可减少30~50%,公路伸缩缝间距可达30~100m,机场跑道的伸缩缝间距可达30m.路面及桥面修补,其罩面厚度仅为3~5cm。 Steel fiber reinforced concrete in road and bridge engineering, main is widely used in road, bridge, airport runway and other projects, including new and repair works. Steel fiber reinforced concrete are better than those of normal concrete toughness, impact resistance, fatigue resistance. It can reduce the thickness of the layer, the expansion joint distance lengthen, using performance improvement, reduce maintenance cost, prolong service life. Surface can reduce 30-50% than those of normal concrete, the highway expansion joint spacing can be up to 30 ~ 100 m, the airport runway expansion joint spacing can be up to 30 m. pavement and bridge deck repair, the thickness of the surface is only 3 ~ 5 cm. 4铁路工程 4 railway engineering 在铁路工程方面,钢纤维混凝土主要用于预应力钢纤维混凝土铁路轨枕、双块式铁路轨枕及抢修铁路桥面防水保护层中。铁路工程承受较大的荷载、较高的速度和数万次的振动,所以要求混凝土必须具有较高的强度、较高的抗冲击性及较大的塑性。这正好利用了钢纤维混凝土的抗冲击性及较好的塑性。建成的工程有:沈阳铁路局长达线维修工程、柳州铁路局黔桂铁路铺设工程、南昆铁路隧道工程和西安安康铁路椅子山隧道等工程土。钢纤维混凝土的应用,使维修工作量大为减少,并提高了线路的使用寿命,效果良好。 In railway engineering, steel fiber reinforced concrete is mainly used for prestressed steel fiber reinforced concrete railway sleeper, double block type railway sleeper and repair railway bridge deck waterproof layer. Railway engineering under high load, high speed and the vibration of tens of thousands of times, so for concrete must have high strength, high impact resistance and larger plastic. The use of steel fiber reinforced concrete in the impact resistance and good plasticity. Completed projects: shenyang railway station for line maintenance, liuzhou railway bureau in guizhou guangxi, nanning railway tunnel engineering and rail laying project of xi 'an ankang railway chairs mountain tunnel engineering such as soil. The application of steel fiber reinforced concrete, has greatly reduced maintenance workload, and improve the service life of the line, the result is good. 5港口及海洋工程 5 ports and ocean engineering 钢纤维混凝土在海洋工程中的使用主要是钢纤维混凝土的腐蚀问题,所以有待进一步研究,但在日本和挪威的使用经验是令人鼓舞的。日本钢铁俱乐部采用钢纤维混凝土作钢管桩防腐层,在海水中浸泡10年,钢纤维混凝土防腐完好,钢管表面无锈蚀,仍有金属光泽。挪威将钢纤维混凝土用于北海海底输气管道的隧道衬砌、Forsmark核电站海底核废料库的支护、海洋平台后张预应力管道孔的封堵以及码头混凝土受海水腐蚀部位的修补等。我国江苏石舀港码头的轨道梁工程中也使用了钢纤维混凝土。 The use of steel fiber reinforced concrete in Marine engineering is mainly steel fiber reinforced concrete corrosion problems, so further research, but in Japan and Norway are encouraging the use of experience. Japanese steel club adopts anticorrosion layer steel fiber reinforced concrete for steel pipe piles, in seawater immersion 10 years, the steel fiber reinforced concrete corrosion in good condition, no rust steel tube surface, there is still a metallic luster. Norway will steel fiber reinforced concrete is used in the north sea gas pipeline undersea tunnel lining, Forsmark nuclear plant nuclear waste repository support, offshore post-tensioned prestressed pipe hole sealing and repairing of the concrete under sea water corrosion parts, etc. Stone having dock track beam in jiangsu province in China is also used in the steel fiber reinforced concrete.

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