Report Paper on Self Compacting Concrete
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Added on 2020-05-11
Report Paper on Self Compacting Concrete
Added on 2020-05-11
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Self-Compacting Concrete 1SELF COMPACTING CONCRETEA Report Paper on Concrete ByStudent’s NameName of the ProfessorInstitutional AffiliationCity/StateYear/Month/Day
Self-Compacting Concrete 2Executive Summary The self-compacting concrete usage is very important compared to other ordinary one. It provides a conducive working environment by reducing noise pollution. Self-compacting concrete developed must ensure a good balance between the stability and deformity. This report presents SCC workability which can be grouped into;Filling ability- This is the ability of concrete in fresh state to stream.Passing ability-The ability of fresh concrete to pass in a narrow sections withoutblockage.Reduced segregation-The ability of fresh concrete to maintain its identity even after the process of casting. This report shows the various experimental procedure for designing self-compacting concrete and highlights also the advantages of SCC such as reduction in noise pollution.
Self-Compacting Concrete 3INTRODUCTION Self –compacting concrete (SCC) is simply an advanced material for construction which does not need to be vibrated in order to achieve full combustion. Self- compacting concrete has advantages compared to conventional concrete such as faster rate of construction, the overall costis low, reduction of on-site repair and it facilitates introduction of automation into concrete construction. Since there is no vibration needed in self-compacting concrete, this causes improvement in health and safety of workers and also a reduction in noise pollution. SCC is composed of sizeable magnitudes inorganic materials which are fined grains and hence provides likelihoods for deployment of mineral admixtures which are recently waste materials with no concrete uses Literature Review In the year 2001, Bertil Persson conducted an experiment to study self-compacting mechanical properties such as creep, elastic modulus, strength, and shrinkage. The results found from the experiment showed that variable modulus, creep and shrinkage had no difference considerably compared to NCC properties. Nan Su Et al also in the same year came up with another mixing design method for self-compacting whereby the determination of the needed amount of aggregate was done and the voids of aggregates were filled with a paste of binders to ensure the ability to flow, self-compatibility by the concrete. Increasing the stability of fresh concrete stability by the use of an increased amount of fine materials in the mixes was attempted by Sri Ravindra rajah in 2003. The result showed that self-compacting concrete having low separation strength could be created by replacing
Self-Compacting Concrete 4coarse and fine aggregate with finer materials. It was also noticed that to increase the strength of SCC, flash ash could be used because it also has a concrete with high strength but of low segregation.[CITATION Geo131 \p 55 \l 1033 ]. In 2008, Paratibha Aggarwal came up with a procedural method on how to design self-compacting concrete grounded on experimental investigation and he concluded that SCC can be developed using VMA. Sri Ravindra rajah made an effort to increase the fresh concrete stability by using applying fine materials in the mixes. They also made a report concerning progress of self-compacting concrete with a reduced segregation potential. In the year 2003, Okamura and Ouchi talked about the two issues majorly affect the international community in the process of using self-contracting concrete namely lack of appropriate design method and jovial testing method. They rendered there help through proposing a new method of designing SCC mix based on paste and mortar knowledge. They also stressed on the need to carry out testing on the final product filling ability, flowability, and ability to pass through narrow places. Cristian Druta (2003) did an experiment to make a comparison between Splitting Tensile Strength and Compressive strength of self-compacting and normal concrete and study thebonding between the cement paste and coarse aggregate. There were various materials that were used such as ash and silica fume, chemical admixtures, mineral admixtures Blast Furnace. Mayur and Shriram in 2012 also did an experiment focusing on the possibility of using waste materials such as glass powder to prepare concrete. The addition of Glass powder decreases the characteristics of self- compaction such as segregation resistance, filling ability andpassing ability. Suraj and Shweta also conducted the experiment with the aim of knowing the effect of adding red mud and foundry waste sand on self-compacting concrete properties having two admixtures that is VMA and Superplasticizer.
Self-Compacting Concrete 5 Lachemi and Bouzouba did again another experiment concerning evaluation and producing SCC made with the fly ash of high volume. The high-volume of fly ash self-compacting concrete having a slump flow ranging 500mm to 700mmResearch Questions The research questions included Q1.What is meant by SCC?Q2.What are the merits of self-computing concrete? Q3.What are the factors affecting self-compacting concrete?Q4.What is the difference between SCC with the ordinary concrete?Q5.Where are the self-compacting uses?Q6.What are the experimental methods of determining SCC properties?Advantages of self-compacting concrete This type of concrete has numerous benefits over the regular concrete. They include:Reduction laborEquipment wear is reducedThe voids are minimized on highly reinforced areasIt has superior strength and durability.It produces superior surface finishes.It generates a uniform surfaceIt permits creation of features in architectural sector.It reduces noise pollutionIt is commended for long-span applicationsThe pumping procedure is easy.Fast placement without vibration. Aims and objectives The main aims of these project is;To establish self- compacting concrete which entails all properties which are favorable to workerscompared to the ordinary concrete.To test SCC in fresh state.
Self-Compacting Concrete 6To carry out Self-compacting concrete evaluation.To investigate the fresh and hardened properties of SCC.Self -compacting concrete has several objects such asTo improve productivityTo improve working environment.To improve homogeneityFactors affecting Self-Compacting ConcreteThe factors mentioned below influences self-compacting concrete performanceWhen the temperature is high.Delays on job site affects the performance of concrete mix designLong haul distances decrease the SCC ability to flow.Applications of Self- Compacting ConcreteThe concrete is perfect to be used in the following applications;Bored shaftsEarth retaining systemColumnTheoretical content Hypothesis H1. Self- compacting concrete can be tested in fresh state Bertil Persson (2012) established an evidence that self-compacting concrete passing ability, filling ability and resistance to segregation can be tested using various s methods such as slump flow. H2. Evaluation of self-compacting workability can be carried out Evaluation of self-compacting concrete workability is an important task according to Mayor and Shriram (2012). SCC workability can be tested by using lump flow method whereby the little time
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