Strength Characteristics Of Slurry Infiltrated Fibre Reinforced Concrete Essay

Concrete floor is one of the most durable materials in the world. It can be made with waste products which help to reduce the consumption of valuable materials. It also can be made from fly ash, slag cement, and silica fume, all waste byproducts from steel mills, power plants and other manufacturing facilities.

1 Brune, PF, AI Ingraffea, MD Jackson, and R Perucchio. 2012. The toughness of Imperial Roman concrete.

This is the most recent type of concrete formwork. It’s an emerging tech for RCC construction as well as architectural design work. This materials’ flexibility creates the ability to make concrete of any shape.

In this quotation from the author Vitruvius, he explains the process and creation of concrete, emphasizes on its durability and how it can withhold the forces of nature. This new formula had a higher silica content then before, which essentially allowed to concrete to set under water and made it stronger then before.10 Overall, the use of concrete was crucial to construction in ancient Rome because it was extremely durable compared to other materials such as brick, stone, or wood.11 Having a successful and powerful empire was very important to the Roman’s as they believed that without a strong foundation, a strong empire would not be possible.12

Fiberglass reinforced concrete (GFRC) is most suitable for construction because it is a great material for restoration of old buildings and also used for the exterior of the buildings. It is also being used widely for walls and ceilings. GFRC allow almost perfect replication of building terra-cotta and ornaments. It’s very low shrinkage allows molds to be made from existing structural ornamentation, then cast in GFRC to replicate the original designs. GFRC is lightweight compared to other traditional concrete which is very important for construction. It is highly durable and safe. Next, expensive equipment is not necessary for pouring or spraying GFRC .Fiberglass is inexpensive and corrosion-proof, but not as ductile as steel. It can only be

1. A representative sample was chosen by quartering (according to BS 812: Part 102: 1984) or by use of a sample splitter (Fig. 2C1-3). The sample to be tested should be the approximate weight desired when dry. For this experiment, about 3 kilograms of coarse aggregate was weighed.

Ultra high performance concrete (UHPC) represents a major progress step over normal strength concrete (NSC) and high strength concrete (HSC), through the achievement of very high strength and very low permeability. Basically, the UHPC is a concrete with compressive strength ranging 120 to 400 MPa, this “ultra” high strength is achieved through different techniques including the use of improved materials, ultra-fine pozzolans (e.g. silica fume), low water-cement ratio, improved quality and higher dosage of superplasticizer, use of fibers (metallic or synthetic) to increase the energy absorption capacity and decrease brittleness, high cementitious materials content, longer mixing time and heat treatment [1]. UHPC tensile strength varies from 10 to 30 MPa; and the modulus of elasticity is in the range of 60 – 100 GPa [2].

Ferrocement is thin and light weight cement composite, with several unique properties. The addition of fibers to the concrete enhances the strength properties of the composite and transforms the brittle cement composite into more isotropic and ductile material called FRC. But these two materials viz- ferrocement and FRC have some drawbacks. These two materials cannot be employed where high vibration, high tensile forces and high impact are to be resisted. Hence the solution lies in the new composite called fibrous ferrocement, which is the combination of fiber reinforced concrete and ferrrocement. This new composite have some improved mechanical properties, such as toughness, impact resistance etc. Addition of more than one type of

Powder type SCC: This mix achieves the fluidity requirements through the reduction of the coarse aggregate volume and the use of High Range Water Reducers (HRWR). The stability comes from a low water to cement ratio with high sand to paste ratio i.e. larger amounts of fine aggregates are necessary to resist segregation in the mix.

According to ASTM C469, Elastic modulus of concrete is directly measured by the static uniaxial compressive test which is called static elastic modulus. As explained previously, there are many relationships between the compressive strength of concrete and its modulus of elasticity, which found from experimental researches. A comparison of published relationships, it clear that some

This chapter reviews the literatures of the available previous studies related to several techniques of strengthening reinforced concrete columns with attention on strengthening reinforced concrete column using concrete jacket. Also this chapter provides a literature review relevant to the history, properties and field application of the ultra-high performance fiber reinforced concrete (UHPFRC). The chapter also reviews several techniques of enhancing the bond at the interface between two concrete layers of different ages.

Introduction: It is widely known that many older reinforced concrete columns may suffer from an inadequate amount of transverse steel reinforcement providing insignificant confining pressure to the concrete core. The seismic performance of these columns may thus be very poor due to their insufficient ductility or low concrete strength. Because the FRP composites owe some of the favorable properties such as high strength-to-weight ratio, the use of FRP composites is nowadays become more common in the construction industry as a confining material for concrete to enhance the strength and ductility capacities of existing RC columns. To achieve a proper and safe design of FRP-confined rectangular RC columns, it is necessary to properly understand and model the axial stress-strain behavior of FRP-confined concrete. The axial cyclic stress-strain behavior of FRP-confined concrete is of particular importance in the seismic design of existing RC columns.

Reinforced concrete is a very strong, fire resistant and insulating product which does not require an enormous amount of skill and time to construct due the fact that it is pre-cast. This is because the members of the

The research seeks to compare the difference in measurement of flexural strength of palm kernel shell (PKS) concrete, using direct and indirect methods (beam and splitting cylinder specimen).The Palm kernel shell (PKS) was subjected to various physical tests and values obtained are as follows; specific gravity of Palm kernel shell (PKS) 1.3, Aggregate impact value 10.23.The Concrete was cast using two mix ratios 1:1.5:3 and 1:2:4. The concrete cubes, cylinders, and beams were crushed at 7, 14 and 28days in other to determine the compressive strength and flexural strength of the concrete for the various mixed. The 28th day compressive strength was 12.30N/mm2 and 20N/mm2, for the two mixed ratio respectively. The 28th day flexural strength was 2.03N/mm2 and 1.10N/mm2 for the beam and cylinder specimen respectively. The student t-test showed that there is no significant difference between the tensile strength measured using direct and indirect

The utilisation of supplementary cementitious materials results in several improvements in the concrete composites and reduction in the overall economy and hence they are well accepted. Ground granulated blast-furnace slag (GGBFS) is a by -product obtained from the steel industry which is naturally cementitious and is commonly used as a replacement for cement material in concrete. In this paper our study is mainly confined to a brief study of GGBFS, its production, composition and applications. It further focusses on examination of changes occurring in the properties of OPC concrete such as strength development, setting time, consistency, durability, sustainability, permeability and appearance on partial replacement of cement with different percentages of GGBFS. We conclude that in recent times, GGBFS concrete has served as a major alternative to conventional concrete and has drawn the attention of the concrete industries due to its cement, energy and cost savings, environmental and socio-economic merits.