Selfcured concrete is a type of concrete with a special ability to. Curing is defined as maintenance of a satisfactory moisture content and temperature in the concrete for a period of time immediately following placing and finishing so that the desired properties may develop. It can perform by several methods such as using lightweight aggregate or chemical agents. Once the concrete has been placed and compacted, it is critical that none of the mixing water needed for cement hydration is lost. In a second project hybrid fiber reinforced cementitious materials are studied that can. The american concrete institute in 2010 defined internal curing as supplying water throughout a freshly placed cementitious mixture using reservoirs, via prewetted lightweight aggregates, that readily release water as needed for hydration or to replace moisture lost through. Project report study on self compacting concrete using. Compressive strength, durability, peg400, selfcuring concrete, split tensile strength. The plan of selfcuring agents is to decline the water evaporation from concrete and hence increases the water preservation capacity of the concrete. Mohanraj, rajendran m studied on selfcuring concrete incorporated with polyethylene glycol. Curing has a strong influence on the properties of. The characteristic of a selfcuring agent is to reduce the water evaporation from concrete, and therefore they grow the water retention capacity of concrete as compared to the conventionally cured concrete.
Curing is the maintenance of a satisfactory moisture content and temperature in concrete for a period of time immediately following placing and finishing so that the desired properties may develop. In this examine, compressive energy and break up the. Durability of selfcuring concrete to sulphate salts and chloride induced corrosion is needed to be evaluated. The issue with such a system, however, is that care must be taken in placing the glass tubes and hence is not suitable for cast insitu concrete. Pdf awareness and benefits of selfcuring concrete in. In scale of construction 101m we can see concrete and reinforcing steel bars, of concrete 10. Properly curing concrete improves strength, durability, water tightness, and wear resistance. This subcourse reflects current doctrine when this subcourse was prepared. It is sometimes called a concrete masonry unit cmu. The concrete was cast along the entire lengths of the walls to avoid construction joints. The purpose of this project is to compare the properties of different mixes of concrete produced with natural aggregate and produced using recycled aggregate, with 20% and 100% replacement by weight, and with 0% and 35% pfa replacement. Construction of a precast prestressed concrete pavement demonstration project on interstate 57 near sikeston, missouri.
A selfcompacting concrete scc is the one that can be placed in the form and. A concrete block is primarily used as a building material in the construction of walls. An experimental investigation of self curing concrete norporat wt poly tyln lyol as s l urn a nt shikha tyagi m. In this research chemical curing agent is used to produce sc. Water is one of the most important element in construction. Pdf mechanical properties of concrete depend on the curing. The chemical agent peg is used with different percentage. These documents are not to be submitted with any patent office.
Internal curing ic is a method to provide the water to hydrate all the cement, accomplishing what the mixing water alone cannot do. Guide specification for internally curing concrete institute for. So it is required to cure for a minimum period of 28 days for good hydration and to achieve target strength. Selfcuring concrete is one type of modern concrete, which cure itself by retaining water moisture content in it. Field guide to concrete repair application procedures aci fall 2011 convention october 16 20, cincinnati, oh aci web sessions peter emmons, faci, is president of structural preservation systems, inc. Selfcuring concrete is the best solution to the problem faced in the desert region and faced due to lack of proper curing. In recent years, the concept of internal curing of concrete has gained popularity and is steadily progressing from laboratory to field of practice. In your own work, always refer to the latest publications. Aielstein rozario et al, said that the permeability of concrete decreases with an increase in the replacement of fly ash with cement and in addition of p. Curing concrete, chapter 12 building a hillside home. In this test, the diameter of the concrete flowing out of the slump cone is a measure of flow, thus determining the consistency and cohesiveness of the concrete. It retains moisture in the slab so that the concrete continues to gain strength.
Curing of concrete plays a major role in improving its durability and performance by developing the concrete microstructure and pore structure. Introducing the selfcuring concrete in construction industry. Concrete basicsaddresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. Experimental study on the properties of selfcuring concrete. Strength comparison of selfcuring concrete and normal. We hereby declare that the 8th semester project report for the project entitled study on self. Selfcompacting concrete is a type of concrete that gets compacted under its selfweight. Concrete is most widely used construction materials due to its strength, permanence and durability. A selfcuring concrete is provided to absorb water from atmosphere from air to achieve better hydration of cement in concrete.
The simplest way of selfhealing is to ensure that extra dry cement in the concrete exposed on the crack surfaces can react with water and carbon dioxide to heal and form. Penetration substances enter into concrete and permeate concrete by difference of pressure on surface of materials water and concrete scales of cement based materials we have several scales of observation of concrete. It delays drying shrinkage until the concrete is strong enough to resist shrinkage cracking. Field guide to concrete repair application procedures.
Mohanraj rajendran m studied on selfcuring concrete incorporated with polyethylene glycol. Concrete basics provides a clear, concise explanation of all aspects of making quality concrete. Vertical shaft kilns were replaced with rotary kilns and ball mills were used for grinding cement. Concrete project conproj dg conproj r dg conproj n conproj r n 30x60 12x24 conproj 36dg 11 r10 a conproj 36dg lp 11 r9 60x60 24x24 conproj 60dg 11 r10 a conproj 60dg lp 11 r9 60x120 24x48 conproj 12dg 11 r10 a conproj 12dg lp 11 r9 120x120 48x48 conproj 120dg 11 r10 a. Self compacting concrete scc developed by professor hajime okamuraof kochi university of technology, japan, in1986 during his research, okamura found that the main cause of the poor durability performances of japanese concrete in structures was the inadequate compacting of the concrete in the casting operations. Super plasticizer named glenium was used to improve the workability of concrete. Strength of self curing concrete is on par with conventional concrete. The volume of the conplast used in selfcompacting concrete is taken as 1% of the volume of the cement.
The selfcompacting concrete flows easily at suitable speed into formwork without blocking through the reinforcement without being heavily vibrated. Investigations on selfcompacted selfcuring concrete. It can perform by several methods such as using lightweight aggregate or. Estimation of desired properties of self curing concrete. The selfcuring concrete is a selfconsolidating concrete.
Also explore the seminar topics paper on self compacting concrete with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students. The specific requirement of selfcompacting concrete is its capacity for. A study on compressive strength of normal curing concrete. Inadequate curing can result in surface damage in the form of plastic shrinkage cracking, spalling, and erosion of paste. Selfcuring concrete types, water retention and durability 9 please cite this article in press as. This comprehensive concrete pdf ebook has both the triedandtested methods and materials, and more recent innovations. A concrete block is one of several precast concrete products used in construction. Selfhealing concrete with a microencapsulated healing agent. Awareness and benefits of selfcuring concrete in construction projects. Concrete basicsaims to provide a clear, concise explanation of all aspects of making quality concrete. The guide specification was developed based on the format used in aashto pp 84. Basics of concrete materials and testing one day, 7.
Considers filling specific pore sizes caused by self. Proper curing allows the concrete to develop its potential strength and durability. It solves the problem that the degree of cement hydration is lowered due to no curing or. According to the aci 308 committee, internal curing refers to the process by which the hydration of cement occurs. Dynamic photomechanics laboratory, department of mechanical, industrial and systems. This paper highlights the effect of curing agent polyethylene glycol peg400 in the performance of concrete. Self compacting concrete seminar report, ppt, pdf for. Compressive strength of cube and cylinder by ndt for selfcured concrete is higher than that of. Curing is the maintaining of an adequate moisture content and temperature in concrete at early ages so that it can develop properties the mixture was designed to achieve. The bacteria bacillus subtilis in solution form is added to the concrete by 3 ml, 6 ml and 9 ml per litre of water.
The result also showed that compressive, tensile and flexural strength of selfcuring concrete is found to be higher than conventional concrete. Selfhealing of concrete a new technology for a more. The term precast refers to the fact that the blocks are formed and hardened before they are brought to the job site. Inspect all materials used in the construction of concrete work at their source, on the job, or both. Concrete cubes, concrete cylinders and concrete prisms are cast for testing. Concrete curing is in goodsupport of maintaining adequate wet content in concrete for the duration of its early stages to develop the desired properties. Selfcuring concrete sc is a concrete type that can be cured without using any external curing regimes. Its commonly abbreviated as scc and defined as the concrete which can placed and compacted into every corner of a formwork. Selfcuring concrete is response to many problems faced due to lack of proper curing. Concrete basics addresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. During the last two decades, concrete technology has been undergoing rapid developments. Crack formation is very common phenomenon in concrete structure which allows the water and different type of chemical into the concrete through the cracks and decreases their durability, strength and which also affect the reinforcement when it comes in contact with water, co 2 and other chemicals. The first project that is discussed is bacterial concrete, in which bacteria are mixed in concrete, that can precipitate calcite in a crack and with that make concrete structures water tight and enhance durability. Lack of proper curing can badly affect the strength and durability.
Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format. For repairing the cracks developed in the concrete, it requires regular. This project deals with the self compacting concrete where the cement is partially replaced. He is chairman of aci committees 364, rehabilitation and 546, repair of concrete. It is required for preparation of mortar, mixing of cement concrete and curing work etc. Curing has long been recognized as an important process in constructing durable concrete pavements. In partial fulfillment for the award of the degree. For example, in hot or dry weather large exposed surfaces will lose water by portland.
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