Trusted by +2 million users,
1000+ happy students everyday
1000+ happy students everyday
Showing pages 1 to 6 of 24 pages
Self-Compacting Concrete1SELF COMPACTING CONCRETEA Report Paper on Concrete ByStudent’s NameName of the ProfessorInstitutional AffiliationCity/StateYear/Month/Day
Self-Compacting Concrete2Executive SummaryThe self-compacting concrete usage is very important compared to other ordinary one. Itprovides a conducive working environment by reducing noise pollution. Self-compactingconcrete developed must ensure a good balance between the stability and deformity. This reportpresents 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 evenafter the process of casting.This report shows the various experimental procedure for designing self-compacting concreteand highlights also the advantages of SCC such as reduction in noise pollution.
Self-Compacting Concrete3INTRODUCTIONSelf –compacting concrete (SCC) is simply an advanced material for construction whichdoes not need to be vibrated in order to achieve full combustion. Self- compacting concrete hasadvantages 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 concreteconstruction. Since there is no vibration needed in self-compacting concrete, this causesimprovement in health and safety of workers and also a reduction in noise pollution. SCC iscomposed of sizeable magnitudes inorganic materials which are fined grains and hence provideslikelihoods for deployment of mineral admixtures which are recently waste materials with noconcrete usesLiterature ReviewIn the year 2001, Bertil Persson conducted an experiment to study self-compactingmechanical properties such as creep, elastic modulus, strength, and shrinkage. The results foundfrom the experiment showed that variable modulus, creep and shrinkage had no differenceconsiderably compared to NCC properties. Nan Su Et al also in the same year came up withanother mixing design method for self-compacting whereby the determination of the neededamount of aggregate was done and the voids of aggregates were filled with a paste of binders toensure the ability to flow, self-compatibility by the concrete.Increasing the stability of fresh concrete stability by the use of an increased amountof fine materials in the mixes was attempted by Sri Ravindra rajah in 2003. The result showedthat self-compacting concrete having low separation strength could be created by replacing
Self-Compacting Concrete4coarse and fine aggregate with finer materials. It was also noticed that to increase the strength ofSCC, flash ash could be used because it also has a concrete with high strength but of lowsegregation.[CITATION Geo131 \p 55 \l 1033 ].In 2008, Paratibha Aggarwal came up with aprocedural method on how to design self-compacting concrete grounded on experimentalinvestigation and he concluded that SCC can be developed using VMA.Sri Ravindra rajah made an effort to increase the fresh concrete stability by usingapplying 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 Ouchitalked about the two issues majorly affect the international community in the process of usingself-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 pasteand mortar knowledge. They also stressed on the need to carry out testing on the final productfilling ability, flowability, and ability to pass through narrow places.Cristian Druta (2003) did an experiment to make a comparison between SplittingTensile 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 wereused 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 ofusing waste materials such as glass powder to prepare concrete. The addition of Glass powderdecreases 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 theeffect of adding red mud and foundry waste sand on self-compacting concrete properties havingtwo admixtures that is VMA and Superplasticizer.
Self-Compacting Concrete5Lachemi and Bouzouba did again another experiment concerning evaluation andproducing 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 QuestionsThe research questions includedQ1.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 concreteThis 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 objectivesThe 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 Concrete6To 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 contentHypothesisH1.Self- compacting concrete can be tested in fresh stateBertil 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 outEvaluation of self-compacting concrete workability is an important task according to Mayor andShriram (2012). SCC workability can be tested by using lump flow method whereby the little time