She was concluded that the optimum dosage of peg400 for maximum compressive strength was to be 1% for. Effect of curing methods on density and compressive. The characteristic of a self curing 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. The chemicals should have abilities to reduce evaporation from solution and to improve water retention in ordinary portland cement matrix. Selfcompacting concrete applications and advantages. The seminar report on self compacting concrete which explains the mix design, advantages and disadvantages, applications, properties,process of making self consolidating concrete, theoretical and experimental studies with test results. She added 12% of peg400 by weight of cement for m25 and m40 grade concrete. Chemicals to achieve self curing some specific watersoluble chemicals added during the mixing can reduce water evaporation from and within the set concrete, making it self curing. 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 fig. There fore each selfcompacting concrete has to be designed for the particular structure to be constructed. Guide to external curing of concrete reported by aci committee 308 aci committee reports, guides, and commentaries are intended for guidance in planning, designing, executing, and inspecting construction.
Incorporation of silica fume into concrete mixtures enhances all physical properties. 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 for the year 2015 2016. The cubes were cured using six methods air curing, watersubmerged curing, spray curing, polythene curing, moist sand curing and. Shikha tyagi studied on self curing concrete and had use peg400 as a self curing agent in concrete.
However working on the parameters which affect the basic properties of self compacting concrete such as plastic viscosity, deformability, flowability and resistance to segregation, self compacting concrete may be proportioned. Download the latest pdf and ppt on slideshare for civil projects. Today concrete is most widely used construction material due to its good compressive strength and durability. Self healing is possible because the material is designed to bend and crack in narrow hairlines rather than break and split in wide gaps like traditional concrete. This method is commonly used in the laboratory for curing the concrete specimens. This paper reports the results of a research study conducted to evaluate the effect of sulfates on the performance of selfcuring concrete. Self curing of concrete concrete construction aggregate. Curing has a strong influence on the properties of hardened concrete. Slump and kelly ball testing would be performed to investigate workability of mixture. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format. Self curing concerete in this we use some admixtures like sra shrinkage reducing admixture propylene glycol type i.
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. Immersion curing with water consists of total immersion of the hardened concrete element. Curing concrete, chapter 12 the university of memphis. Self curing concrete with light weight aggregate international. The aim of this investigation was to study about the strength properties of concrete using water soluble.
The reports discuss the types and names of bacteria, its mechanism and preparation, chemical process that fix cracks in concrete, test results, advantages and applications. A handful of drizzly days would be enough to mend a damaged bridge made of a new self healing concrete developed by researches at the university of michigan. 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. In conventional concrete curing is done by after various stages like mixing, placing and finishing. Best pdf documents and journals for seminar report and ppt on self healing concrete also known as bioconcrete or bacterial concrete. Applications of external self curing concrete as a spray applied membrane to retain moisture in concrete for effective curing.
Apr 2006 data sheet curing of concrete curing is the process of controlling the. Self curing or internal curing is a technique that can be used to provide additional moisture in concrete for more effective hydration of cement and reduced self desiccation. Self compacting concrete has been used in bridges and even on precast sections. Concept of internal curing self curing it is widely acknowledged that, amongst researchers and practitioners, internal curing concepts emerged from the united states by paul klieger in 1957 2,17,21,22. A measure of the ease by which fresh concrete can be placed and compacted. In this project, the scc was mixed onsite and pumped through a piping system to the specified point, located 200 meters away. Internal curing was originally defined by the american concrete institute aci 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 evaporation or self desiccation.
However working on the parameters which affect the basic properties of selfcompacting concrete such as plastic viscosity, deformability, flowability and resistance to segregation, selfcompacting concrete may be proportioned. Pdf effect of self curing compound on strength and. Selfcuring concrete is one of the special concretes in mitigating insufficient curing. The aim of this investigation is to study the strength and durability properties of concrete using watersoluble polyethylene glycol as selfcuring agent.
An experimental investigation of self curing concrete norporat wt poly tyln lyol as s l urn a nt shikha tyagi m. Selfhealing of concrete a new technology for a more. There are two major methods available for internal curing of concrete. Self curing concrete scc can cure without using any external curing methods. A free powerpoint ppt presentation displayed as a flash slide show on id. The need for adequate curing of concrete cannot be overemphasized. This method of curing satisfies all the requirements of curing, namely, promotion of hydration, elimination of shrinkage and absorption of heat of hydration. Selfcuring concrete is achieved by means of replacing a part of aggregate by lightweight aggregate or adding chemical admixtures. Self compacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta concrete that can flow under its own weight through restricted sections without segregation and bleeding. Curing may be applied in a number of ways and the most appropriate means of curing may be dictated by the site or the construction method. Which protects the concrete and reinforcement from cracks and from corrosion. One of the most remarkable projects built using self compacting concrete is the akashikaikyo suspension bridge.
Although the idea to use bacteria and integrate them in the concrete matrix may seem odd at first, it is not from. It was found that peg 400 could help in self curing by giving strength on par. This study considered the effect of different methods of curing on density and compressive strength of concrete. Self compacting concrete seminar report, ppt, pdf for. The self curing process of concrete takes place from inside to outside, thus reducing the autogenous shrinkage and self desiccation, especially for the highperformance concrete with relatively low waterbinder ratio.
Potential materials cement of 53 grade fine aggregate. There fore each self compacting concrete has to be designed for the particular structure to be constructed. Ppt self compacting concrete powerpoint presentation. Currently, there are two major methods available for internal curing of concrete. An average increase in the compressive strength of 12% was found when self curing concrete of peg 400 was used in curing than the conventional curing of concrete. Pdf selfcuring concrete under sulfate attack researchgate. Curing curing of concrete is defined as providing adequate moisture, temperature, and time to allow the concrete to achieve the desired properties for its intended use.
Any negligence in curing will interfere in the strength and durability of concrete. Curing plays an important role on strength development and durability of concrete. Curing takes place immediately after concrete placing and finishing, and involves maintenance of desired moisture and temperature conditions, both at depth and near the surface, for extended periods of time. Role of concrete curing portland cement association.
The terms curing and drying are frequently used interchangeably with regard to the moisture condition of new concrete slabs. Depending upon the nature of work the cement, fine aggregate, coarse aggregate and water are mixed in specific proportions to produce plain. The chemicals should have abilities to reduce evaporation from solution and to. Higher cement content andor lower watercement ratio leads to more effective results of self curing agents in concrete. Lab 1 concrete proportioning, mixing, and testing supplemental lab manual prepared by mutlu ozer objectives concepts background experimental procedure report requirements discussion objectives students make concrete according to the mix design. Polyethylene glycol peg is one of the chemical agents which minimizes the loss of water and also attracts moisture. Experimental investigation on selfcuring selfcompacting. A significant amount of research has been conducted to evaluate curing effectiveness and its effect on concrete properties. Curing of concrete has an effect on hardened concrete properties and overall longterm performance of portland cement concrete pcc pavement. Introducing the selfcuring concrete in construction industry. By doing this, it prevents water to percolate into reinforced steel concrete and hence it does not comes in contact with reinforcements. External self curing concrete is the one which can cure itself by retaining its moisture content within the concrete by the application of curing compounds on the surface of the concrete.
As defined by aci, self or internal curing refers to the process by which the hydration of cement occurs because of the availability of additional internal water that is. The use of self curing admixtures may be very crucial from the point of view that saving of water is a necessity every day every one cubic. Proper curing is necessary to achieve desired strength and performance of concrete. Curing of concrete by carbondioxide pdf tips for selection of materials for high strength concrete pdf leave a comment. Pdf experimental study on the properties of selfcuring. Self curing is a technique which is used to provide proper moisture contents in. Internal curing is often also referred as selfcuring. However, the concept of internal curing is new in concrete design while porous light weight aggregates lwas have been used in.
1350 698 660 546 1607 592 333 222 696 118 895 983 35 716 286 1267 1242 1419 1487 727 1425 1014 729 1078 1584 1229 139 523 790 1079 203 1219 570 749 987 253 491 551 1497 61 238 21