A Compatibility Study on Different Types of Cement and Plasticizer (original) (raw)
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COMPATABILITY OF SUPER PLASTICIZERS WITH GGBS BLENDED CEMENT CONCRETE USING OPC-53S
nternational Journal of Management, Technology And Engineering, 2019
The current study discusses the flow behavior of super plasticized cement which is specially graded (OPC 53-S) and the properties of high performance concrete which is controlled by the dispersion of cement particles by the super plasticizers. The blended special graded cements with GGBS are being used quite commonly instead of pure special cement due to its insufficient production, to improve the durability of concrete. The experimental procedure for evaluating the flow behavior of cement paste with different brands of PCE based super plasticizer is discussed and the dosage of super plasticizers is optimized. The evaluation of the effectiveness of plasticizers is also reviewed. The factors which control the compatibility, the presence of minerals and chemical admixtures, the proportion of concrete have been discussed clearly. The mechanism of concrete has also been discussed. Reduced rates of strength gain, loss of workability, change in the long term behavior, alteration of setting behavior are the specific issues of incompatibility. It was mainly observed that Marsh Cone test can be more helpful to optimize the percentages of the chemicals through which the incompatibility between the special cement OPC 53-S and water reducing chemical admixtures could be got rid of.
STUDIES ON COMPATIBILITY ISSUES OF SUPER PLASTICIZERS WITH OPC 53-S CEMENT
International Journal of Technical Innovation in Modern Engineering & Science (IJTIMES), 2019
The behaviour of the high performance concrete in fresh state can be calculated with the flow behaviour of cement paste made with required dosage of High Range Water Reducer (Super Plasticizer). To know the flow behaviour, Compatibility studies are to be done. This Paper deals with the Compatibility issues between different types of Super Plasticizer coming under PCE and SNF groups with OPC 53-S cement. The Compatibility between Super Plasticizer and OPC 53-S cement can be known by conducting three different types of tests. Flow test, Mini Slump test and Penetration tests are conducted and Compatibility studies are done. From flow test and mini slump test, the flow behaviour of the super plasticizer can be observed. And from the penetration test, the setting time of super plasticizer can be obtained. All the tests conducted above are conducted with varying w/c ratio i.e. 0.35 w/c and 0.40 w/c. The test results also show the variation of the curves with two different w/c ratios. This Paper also mentions the optimum dosage of PCE based Super Plasticizer is 0.9% with respect to the weight of the cement and SNF based Super Plasticizer is 1.0% with respect to weight ofcement.
Strength and Workability Characteristics of Concrete by Using Different Super Plasticizers
International Journal of Materials Engineering, 2012
Concrete, a composite material made with cement, aggregates, admixtures or super plasticizers and water comprises in quantity the largest of all man-made materials. Although aggregates make up three fourths of the volume of concrete, the active constituent of concrete is cement paste. The properties and performance of concrete are largely determined by the properties of the cement paste. Super plasticizers in concrete confer some beneficial effects such as acceleration, retardation, air entrainment, water reduction, plasticity etc., and these effects are due to their action on cement. The scientists are mainly concentrating to develop the specialized concretes, to enhance the service life of the buildings, and to provide satisfactory performance under aggressive environments. In the present experimental investigation M 30 concrete is used as control mixture with four different super plasticizers namely SNP (Sulphonated Naphthalene Polymer) 1, SNP 2, SNP 3 and SNP 4. Strength of modified concrete is compared with the normal concrete i.e. without super plasticizer. The results show that the significant improvement in the strength and workability of modified concrete.
EFFECTS OF CHEMICALS AS SUPERPLASTICIZER ON VARIOUS PROPERTIES OF THE CONCRETE
International Journal of Creative Research Thoughts (IJCRT), 2020
The second most consumed material on earth is concrete, after water. So we need to look for ways to reduce the use of water in concrete in most economic way possible. We also want concrete to gain its ultimate strength earlier to reduce the overall requirement of water. Plasticizers and Superplasticizers are used to reduce the water requirement in the concrete. The use of these admixtures not only reduces the water content of the concrete but also gives higher early strengths and higher ultimate strengths. The available Plasticizers and Superplasticizers in the market are costly and hence cannot be used for smaller project as they will make the project uneconomical. This project work is conducted to find better alternatives to these available costly Superplasticizers. This report is about the project work which includes the study of effect of chemicals as Superplasticizers on various properties of the concrete. The study of different chemicals used as Superplasticizers for concrete and their comparison with the normal concrete. There are two different chemicals taken for the project work. The chemicals are added in different proportions of 0.25%, 0.5%, 0.75% and 1% of the weight of cement. The concrete cubes of M25 grade were prepared. The normal cubes and the cubes with the chemical admixture were tested. Then the behavior of the concrete is noticed to checks how the changes made in the properties with the addition of the different proportion of the chemicals. The reduction in water content is also checked with the addition of the different proportion of the chemical admixtures. The properties like consistency, initial setting time, slump cone test, water absorption test and compressive strength tests were tested. The project work also include the study of the properties of the chemicals used for the project work .It comprises of different tests for different building material such as sand, aggregates (coarse & fine aggregates), concrete and cement used for the completion of the project. The aim of the project is to find a better substitute to the costly super plasticizers available in the market and make the each project economical.
Compatibility Assessment of Commercial Cements with superplasticizers
E3S Web of Conferences, 2020
In the present study, compatibility assessment of commercially available cements (OPC and PPC) and SNF & PCE based super plasticizers are made by evaluating the workabilities, setting times and compressive strengths of M40 grade concrete mixes made with two different brands of cement and with two different chemical admixtures. The dosage of SNF and PCE based chemical admixtures to be used in M40 grade concrete is determined using marsh cone test. It was found that M40 concrete made with SNF based superplasticizer has achieved desired compressive strength than the concrete made with PCE based superplasticizer. This shows that SNF based superplasticizer is more compatible for M40 grade concrete than PCE based superplasticizer. So it is suggested that for the development of PPC based M40 grade concrete SNF superplasticizers can be used.
2017
lightweight concrete can be defined as a type a type of concrete which includes an expanding agent in that it increases the volume of the mixture while giving additional qualities and lessened the dead weight ,it has low density compared to the conventional concrete . Over the past six decades, EPS has become accepted world-wide as the safe, highly effective, economical form of building insulation. Building costs, rising energy costs and a greater awareness of global warming and energy conservation are important aspects of home building.With the increase in demand for construction materials, there is a strong need to utilize alternative materials for sustainable development. Super Plasticizers are a relatively new category of plasticizer and also the improved version of plasticizer. They are different from normal Plasticizers chemically. The use of Super Plasticizer in concrete is an important in advancement of concrete technology. Use of Super Plasticizer permits reduction of water...
Use of Super Plasticizers in Concrete -A Review
International Journal For Research In Applied Science & Engineering Technology, 2020
The substance of good quality cement is the necessity of right usefulness. Under various circumstances cement of various level of usefulness is required. A serious level of usefulness is needed in circumstances like profound bars, dainty segments with high level of fortification, shaft and segment intersections, siphoning of cement, tremie cementing, blistering climate cementing and so on The ordinary techniques for improving work¬ability are by improving the degree or expanding the amount of fine total or by expanding the concrete amount. In this study we are presenting review of literatires re;ated to utilization of plasticizers in concrete and its beneficial effects.
Effect of Superplasticizer Dosage on Workability and Strength Characteristics of Concrete
The use of chemical admixtures in concrete is a common solution to achieve full compaction particularly where reinforcement congestion and shortage of skilled workers. The past researchers have been underscored the use of chemical admixtures imparts the desirable properties to concrete in both fresh and hardened state. This paper has been made an attempt to study the influence of superplasticizer dose of 400ml, 600ml, 800ml, 1000ml and 1200ml/100 kg of cement on performance of Concrete. The experimental tests for fresh and hardened properties of concrete for three mixes of 30 MPa grade are studied and the results are compared with normal concrete. The tests considered for study are, slump test, slump loss, flow table and compressive strength test The results show that for the constant water cement ratio, increase of superplasticizer dose in properties of concrete leads to gain of good workability. Moreover, there is also increase in compressive strength than that of normal concrete mix.
Superplasticizer compatibility with cement properties -A study
, Materials Today: Proceedings, 2022
Portland cement has been the conventional building material down through the ages. But with passing decades materials other than cement were being added to the cementitious system from outside to improve or modify its mix properties. The role of these materials was of varying degrees starting from water reducing to viscosity modifying to shrinkage reducing to being pozzolanic to reducers or accelerators. The existing literature survey suggests that a very high range water reducer or Superplasticizers can make a cementitious mix flowable at a low water-cement ratio without segregation and bleeding-the most basic principle of a fresh cementitious mix. Portland cement without admixtures in contact with water tends to flocculate resulting in agglomeration of particles in the mix thus making the system non-lubricating. Our paper discusses the various effects of Superplasticizers on the properties of cementitious mixes and the contribution of its constituent mineral phases. More recently, a new type of Superplasticizers based on 4th generation polymers are preferred in terms of lower slump loss at a low water-cement ratio. Our paper reports the addition of high performing superplasticizer-Poly Carboxylate Ether in cement composites as per Indian Standards has resulted in a denser cementitious matrix and higher strength gain at longer terms compared to normal superplasticizers.