Publication

Hydro-abrasion resistance of UHPFRC and concrete according to the ASTM C1138 method

Eugen Brühwiler, Giovanni De Cesare
2024

Abstract

The ASTM C1138 "Standard Test Method for Abrasion Resistance of Concrete (Underwater Method)" method aims to reproduce conditions in which flowing water carries solid particles, causing abrasion of the tested concretes. The method uses rotating steel balls to simulate the frictional effect of suspended and bedload particles on the specimen surface. The test setup is composed of a rotating agitation paddle that induces the abrasive forces of the grinding balls. This study focuses on the differences in hydro-abrasion resistance of two cementitious materials, standard concrete and UHPFRC (Ultra High-Performance Fiber Reinforced Cementitious Composite) which is a novel building material used for the rehabilitation and strengthening of concrete structures. High resolution surface scans were performed to characterise the circular material specimens at the end of the test. The results show that UHPFRC has a significantly higher hydro-abrasion resistance than concrete. Lastly, an application of a UHPFRC protection layer on exposed concrete surfaces of a hydropower plant in Switzerland is briefly described.

Official source

https://infoscience.epfl.ch/entities/publication/d7c3b065-056e-4e67-8cfd-40e5fe4a948c

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Eugen Brühwiler, Giovanni De Cesare
2024

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d7c3b065-056e-4e67-8cfd-40e5fe4a948c

About this result

Related concepts (32)

Concrete

Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that is easily poured and molded into shape.

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Types of concrete

Concrete is produced in a variety of compositions, finishes and performance characteristics to meet a wide range of needs. Modern concrete mix designs can be complex. The choice of a concrete mix depends on the need of the project both in terms of strength and appearance and in relation to local legislation and building codes. The design begins by determining the requirements of the concrete. These requirements take into consideration the weather conditions that the concrete will be exposed to in service, and the required design strength.

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Hydro-abrasion resistance of UHPFRC and concrete according to the ASTM C1138 method

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