Advantages and disadvantages of silica fume in concrete. Ingredients of concrete are easily available in most of the places. One of the potential drawbacks of rpc production in new zealand is the absence. What are the advantages and disadvantages of each of the. Reactive powder concrete rpc is a developing composite material that will allow the concrete industry to optimise material use, generate economic benefits, and build structures that are strong. Thus, this paper is an attempt to define bacterial concrete, types and classification of micro organisms, working of bio concrete as a repair material, advantages and disadvantages of bacterial.
Reactive powder concrete rpc, a cementbased composite material well known for the ultra high strength, highdurability and lowporosity, made its international debut in 1994 richard, 1994 1. Induced microcracking does not impede compressive strength enhancement. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Learn the material composition, design mix, mechanical and physical properties, disadvantages, permeability, advantages over high performance concrete applications.
Advantages and disadvantages of silica fume in concrete silica fume is a byproduct of producing silicon metal or ferrosilicon alloys. Properties of reactive powder concrete and its application. Effect of silica fume on concrete properties and advantages. Advantages and disadvantages of reinforced concrete civil. Proposed model for uniaxial compression behavior of reactive. Composition of reactive powder concretes sciencedirect. Jan 16, 2017 reactive power q var is needed for a proper functioning ac power system to keep the voltage up and is related to the active power p kw and apparent power s kva through the power triangle. Reactive powder concrete rpc was developed in france in the early 1990s and the worlds first reactive powder concrete structure, the sherbrooke bridge in canada, was erected in july 1997. In this study, the production of lightweight reactive powder concrete lrpc was aimed by using pumice aggregate so as to gain advantage on. Wu department of construction engineering, national taiwan university of science and technology. Performance concrete uhpc, or reactive powder concrete rpc.
The concrete plays a very important role in all branches of civil engineering. Roman concrete the roman concrete had great advantages it was strong and easier to use than stone for making smooth shapes such as domes it could set under water, so it could be used for piers and pediments of bridges and aqueducts it also had some disadvantages. Concrete is building material mostly used now a days for construction activities, it is used to get desired strength from structure made of it. Reactive powder concrete rpc ppt topics for seminar. Reactive powder concrete introduction reactive powder concrete rpc is the generic name for a class of cementious composite materials developed by the technical division of bouygues, in the early 1990s. Performance of reactive powder concrete rpc with different curing conditions and its retrofitting effects on concrete member t. Jul 19, 2016 advantages of reinforced concrete reinforced concrete has a high compressive strength compared to other building materials. Advantages and disadvantages of concrete civil engineering.
Rather a wide range of compositions is encountered, depending on the application and the purity of aluminium source used. One of the most beneficial uses for silica fume is in concrete. Concrete designed from reactive powder concrete and highperformance concrete is experimentally. Reactive powder concrete rpc and general equation for expressing such. The material is typically formulated by combining portland cement, supplementary cementitious materials, reactive powders, limestone and or quartz flour, fine sand, highrange water reducers, and water. Following are the advantages of reactive powder concrete compared to other types of concretes. Reactive powder concrete introduction reactive powder concrete.
What are the advantages, disadvantages and applications of. It is widely used in many types building around the world. There are several advantages of high performance concrete hpc application in building construction which are not achievable using conventional concrete. Concrete technology diagnosis and control of alkaliaggregate. Reactive powder concrete rpc is an emerging technology that lends a new dimension to the term high performance concrete. A messy process, requiring additional work to clean up. Because of its chemical and physical properties, it is a very reactive pozzolan. Advantages and disadvantages of reinforced concrete. In this paper, the making of concrete and its advantages and disadvantages will be discussed, alongside some different alternatives that have been implemented at present time to deal with energy efficiency and environmental security. Analysis and design of rpc girders voo, yen lei on. Alkali reactive carbonate aggregates have a specific composition that is not very common. Jun 17, 2019 selfconsolidating concrete is a highly flowable type of concrete that spreads into the form without the need for mechanical vibration. Advantages of concrete, disadvantages of concrete, advantages and disadvantages of concrete,inert material acts as a filler and the binding materials.
The advantages of reactive powder concrete rpc include higher durability, ductility and strength in comparison with normal concrete and fibre reinforced. A highperformance reactive powder concrete rpc was prepared with river sand, and the maximum particle size is 1. The importance of selfcompacting concrete is that maintains all concretes durability and characteristics. Selfcompacting concrete is a nonsegregating concrete that is placed by means of its own weight. Reinforced concrete, as an economic building material, is very popular nowadays. A composite material of ultra high quality with mechanical properties. Rpc will be capable to settle a lot of shortcomings problems of last century mixture. Concrete can be manufactured to the desired strength with an economy. Pdf engineering properties of reactive powder concrete without. Reactive powder concrete rpc is an ultra highstrength and high ductility cementitious composite with advanced mechanical and physical properties. The main function of polyacrylate is to decrease the water cement ratio and also to improve the workability of concrete.
There are concretes that leads the way to the achievement of the maximum compressive strength of the order 120150 mpa. As it is easy to design and produce concrete of desire strength by using its ingredients like aggregate. Advantages of sfrc steel fiber reinforced concrete 6. Composition it is made out of comparative modulus of flexibility. It has immense potential in construction due to its superior mechanical and durability properties compared to conventional high performance concrete, and could even replace steel in some applications. Reactive powder concrete ppt video online download slideplayer. Reinforced concrete has a high compressive strength compared to other building materials. Along with many advantages, reinforced concrete also poses some disadvantages also. If oxalic acid is included in the powder, it can cause etching or blistering of marble and limestone depending on the skill of the person using it. Research article properties of reactive powder concrete and. Nowadays, the most widely used uhpc is the socalled reactive powder concrete rpc and its derivatives. Alkalisilica reactivity has been recognized as a potential source of distress in concrete since the late 1930s stanton 1940 and pca 1940. Pdf a new approach for production of reactive powder concrete. Rcc concrete is considered as a chemically combined mass where the inert material acts as a filler and the binding materials act as a binder.
What is concrete and what are the advantages of concrete. What is reactive powder concrete rpc rpc is an ultra high strength and high ductility cementitious composite with advanced mechanical and chemical properties. A study on properties of reactive powder concrete ijert. Advantages of reinforced concrete the concrete has a high compressive strength compared to other building materials. Silica fume advantages and disadvantages in concrete silica advantages of silica fume in concrete. A highperformance reactive powder concrete rpc was prepared with river. Aug 30, 2017 in no particular order here is a list of some more advantages and disadvantages of reinforce. The main drawback of this concrete, which eventually did not have any practical applications, was diminishing the mechanical properties after contact with water. Reactive powder concrete composition and advantages. Development of an ultrahigh strength ductile concrete designated rpc reactive powder concrete, was made possible by the application of a certain number of basic principles relating to the composition, mixing and postset heat curing of the concrete.
Mixture of fiber strengthened, super plasticized, silica rage, bond and quartz sand with low water concrete proportion. Selfcompacting concrete applications and advantages. Due to the provided reinforcement, reinforced concrete can also. Feb 23, 2018 it usually contains other calcium aluminates as well as a number of less reactive phases deriving from impurities in the raw materials. The strength, durability, resistance to chemical attack, and workability of high performance concrete are high. Abstract this research describes the importance of the effect of silica fume on concrete properties and the advantages of its use in the kurdistan region, silica fume can either be addition added separately at the concrete mixer or incorporated into a factoryproduced composite cement. Due to the frame, the reinforced concrete can also withstand a good amount of tensile stresses. Concrete technology and special concrete presentation on reactive powder concrete. Fine ingredients makes the concrete void proof and no leakage of gas or liquid occurs. Ultrahigh performance concrete uhpc, is also known as reactive powder concrete rpc.
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