Mechanical Characteristics of Reactive Powder Concrete

EasyChair Preprint 13270

Abstract

Reactive Powder concrete has become one of the most important types of concrete due to its perfect features in terms of strength and durability, in addition to its small sections compared to regular concrete, which provides enormous possibilities for multiple applications. The mechanical properties of different mixtures of this concrete were tested in this study. They included many variables, namely three types of pozzolanic materials and two types of reinforcing fibers, in addition to three percentages of fiber content. The effects of variables, such as the type of fibers and the type of pozzolanic materials, had a greater impact on the mechanical properties of these mixtures. All mixes at the early ages, showed high compressive strength values, because of the specimens' curing process using steam. Mixtures that contain micro-silica with steel fibers have a high compressive strength at early ages, reaching 118 MPa, while those containing propylene fibers reach 115 MPa. The mixtures containing silica showed higher results at 28 days of age than those containing micro-silica. Compressive strength values with steel fibers reach 195 MPa and 187 with polypropylene fibers. Mixes containing meta-kaolin gave lower results. For the second variable, the type of fiber, the mixtures containing steel fibers gave higher compressive strength results than those containing polypropylene fibers, at a rate of up to 5%. Changing the percentage of fiber content in the mixtures also led to a change in the compressive strength results in all mixtures, with varying percentages of up to 6%. The effect of the three variables on the density obtained for the mixtures was low. The highest density obtained was 2510 kg/m³ for Mix S9, while the highest density was 2398 kg/m3 for Mix P3. The highest absorption reached 0.56% at 3 days of age for mixture P3, and the lowest absorption at the same age was 0.18% for mixture S7, where the difference reached 60%.

Keyphrases: Metakaolin, Polypropylene, RPC, Reactive powder concrete, Steel fiber, silica fume

@booklet{EasyChair:13270,
  author    = {Suaad Al-Fadhli},
  title     = {Mechanical Characteristics of Reactive Powder Concrete},
  howpublished = {EasyChair Preprint 13270},
  year      = {EasyChair, 2024}}