Effect of Super Plasticizer on the Mechanical and Durable Properties of High Volume Cementitious Concrete (original) (raw)
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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.
Effect of Superplasticizer on Workability and Properties of Self-Compacting Concrete
Journal of Physics: Conference Series
From recent issues of stability, particle suspension, particle segregation, flow characteristics and cohesiveness in concrete, Superplasticizer has played an important role in this part. This research examined the effect of superplasticizer on workability and properties of self-compacting concrete (SCC). Three types of superplasticizers Conplast SP 561, Conplast SP 430 and Conplast SP 264 at different percentages (0, 10, 20 and 30%) with the same water cement ratio of 0.3, with M30 grade of concrete. The workability slump, v-funnel and l-box the test carried out on fresh concrete. Compressive strength test was carried out on the hardened concrete. All mix were satisfactory but the mix with conplast SP 430 had better workability and strength.
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.
International Journal for Research in Applied Science and Engineering Technology, 2023
In present world global warming is one of the primary concern of the world community due to continuous increasing of carbon foot print since last few decades. Among the different source of carbon foot print in global atmosphere, cement industry alone contribute nearly 8% to the global anthropogenic CO2 emissions as 1 MT of cement production is generating nearly 0.87 MT CO2 to the atmosphere. Hence considering the threat of continuously increasing carbon foot print of the atmosphere number of ways were adopted for reduction of carbon foot print by many researchers in past like using of supplementary cementitious material (SCM) in production of concrete. But in the present research work it has been revealed that by using of high grade PCE based superplasticizer with an increased dosage has shown significant reduction in the consumption of cement with regards to strength requirement of concrete. Thus by reduction of cement consumption in concrete has shown significant reduction of carbon foot print generated from cement industry. On the other side the present research work has also revealed that, by using of high grade PCE based superplasticizer with an increased dosage helps to produce high workability & high performance concrete at very low w/c ratio. Thus because of using very low w/c ratio in concrete without impacting its fresh concrete properties there is a significant improvement has been noticed in hardened concrete properties like increase in strength of concrete, reduction in pore sizes of concrete resulting improvement of concrete durability performance. With regards to cost analysis of the proposal based on the present research work, it is found that using of increased dosage of superplasticiser in concrete is still found to be economic as compared to cost of concrete with high dosage of superplasticiser, as the cost reduction of concrete is higher due to higher amount of cement reduction in concrete as compared to extra cost of Superplasticizer in concrete beyond the optimum dosage of superplasticiser in concrete.
A Study on different types of Super plasticiser used for Self-Compacting Geo-polymer Concrete
This paper presents an experimental study of the influence of different superplasticizer on compressive strength at 7 th and 28 th days with its flow test characteristics, this concrete is prepared with fly ash based self-compacting geopolymer concrete (SCGC). Two superplasticiser (SP)were taken for the comparision, which are being generally used and easly available in market. MasterGlenium ACE 30 is an innovative second generation of polycarboxylic ether polymers superplasticiser. Vs. Conplast SP550 is based on Sulphonated Naphthalene Polymers and is supplied as a brown liquid instantly dispersible in water. Both SP were added in same quantity and same mix design, both different SP mixes were ideal to each other for premiing, during mixing and post mix operations. Amount of plasticiser and the type of plasticiser used are making major concentration points. Which is showen in this paper. This behaviour of plasticiser is tested on the all 8M, 12M and 16M mixes, flow test and 7 th ,28 th and 90 th days strength are compared and on that basis conclusions are given.
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
Super plasticizer has played a significant part in the recent issues of stability, particle suspension, particle segregation, flow properties, and cohesiveness in concrete. This study looked at how self-compacting concrete's characteristics and workability were affected by super plasticizer (SCC). Super plasticizers Conplast Conplast SP 430 is employed in the current investigation with concrete grades M30 and M40. Fresh concrete was used for the workability slump, compressive strength, and flexural strength test. On the hardened concrete, a test for compressive strength was performed. While every mix was acceptable, the one containing Conplast SP 430 had the best workability, compressive strength, and flexural strength. In the present investigation, it is show, how the cement content decreased by 23% and increasing compressive strength, flexural strength and reduced water-cement ratio also.
Increasing the sustainability of concrete using Super plasticizers: A Study
project. Based on several literature review for the project proposal for the graduate project, a complete research was done on the various construction materials and several design calculation for sustainable method of construction. Based on several developments and trends in construction and design software field, the economical method can be achieved by using sustainable materials. Construction process require several materials such as concrete, bricks, cement, sand, steel, wood etc. However cement concrete remains the main construction material used in the foundation work, roof slabs, beams and columns. The main constituents of cement concrete are fine aggregate (sand), cement and coarse aggregate (gravels). It is an important fact that manufacturing of 1 metric ton of cement, about 0.9 metric ton of CO 2 is produced. To avoid this problem the use of cement in concrete and mortar should be reduced. This can be achieved by replacing the normal Portland cement into other available cementitious materials or using different admixtures. Several latest development in the manufacturing industries led to addition of several additives to the concrete mix either in the form of mineral or chemical form, these include chemical admixtures like water reducers and set controllers. This paper gives the study about the superplasticizers which are added to the fresh concrete mix in order to increase the sustainability of it and thereby the addition of the superplasticizers reduces the water to cement ratio, not affecting the workability of the concrete mix. It produces the self-consolidating and high performance concrete thereby increases the performance of hardening fresh paste. Generally the strength of concrete increases whenever the water content of 99152845 Engineering Graduate Project NAVEEN RAJ Project ProposalPage 1 the mix decreases. Superplasticizers concrete can be easily pumped and achieve its workability but it should be added to the mix at correct time.