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Arch bridge made of reactive powder concrete

机译：拱桥由反应性粉末混凝土制成

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Concrete is the most commonly used building material. It is used for buildings, industrial structures, bridges and dams. Every day the concrete is being improved, to achieve better characteristics, reduce price and to be environmental acceptable. In the introduction an historical overview of concrete is given -beginning in the 1950s when the compression strength was 40 N/mm2. Today this is the Industry standard. Concrete with compression strength greater than 40 N/mm2 is called high performance concrete (HPC). The first HPS concretes were made in 1960. Around 1990, Reactive Powder Concrete (RPC) started to appear. Their strengths go up to 800 N/mm~2. Today, HPC is limited to bridges, and RPC is still very rarely used. In this work we present a method for making a RPC composite material with a compression strength of up to 170 N/mm~2. Preparation and testing of material is performed in the laboratory of the Faculty of Civil Engineering in Zagreb. In addition to the mechanical properties, the durability parameters are also tested. Detailed concrete mix proportions are given in the article. The possibility that RPC could be used to construct an arch bridge over Bakar strait (Croatia) is analyzed. The bridge would have arch span of 432 m. Due to very high compression strength of RPC the span length may be increased, therefore reducing the total construction cost. RPC is also used to increase the resistance to freeze-thaw cycles, increase abrasion resistance, and reduce chloride permeability. Many large Adriatic bridges have experienced durability problems that are primarily the result of using standard concrete. Each of these durability enhancements provided by RPC decrease maintenance costs and lengthens the service life of a structure, which is vital for bridges in the Adriatic region.
机译：混凝土是最常用的建筑材料。它用于建筑物，工业结构，桥梁和水坝。每天都有改善混凝土，实现更好的特点，降低价格并成为环境可接受的。在引言中，当压缩强度为40n / mm 2时，在20世纪50年代给出了混凝土的历史概述。今天这是行业标准。压缩强度大于40N / mm2的混凝土称为高性能混凝土（HPC）。第一个HPS混凝土是在1960年制成的。1990年左右，反应粉混凝土（RPC）开始出现。他们的优势高达800毫升〜2。如今，HPC仅限于桥梁，RPC仍然很少使用。在这项工作中，我们提出了一种制备RPC复合材料的方法，其压缩强度高达170N / mm〜2。材料的制备和测试是在萨格勒布市土木工程学院的实验室进行的。除了机械性能之外，还测试了耐久性参数。详细的混凝土混合比例在制品中给出。分析了RPC可以用于构建秃鹰海峡（克罗地亚）构建拱桥的可能性。这座桥将有432米的拱形跨度。由于RPC的非常高的压缩强度，可以增加跨度长度，因此降低了总构造成本。 RPC还用于增加抗冻融循环的抗性，增加耐磨性，降低氯化物渗透性。许多大型亚得里亚桥具有经历了耐用性问题，主要是使用标准混凝土的结果。由RPC提供的这些耐久性增强功能降低了维护成本并延长了结构的使用寿命，这对于亚得里亚地区的桥梁至关重要。

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