Blended Self Research Articles

Analyzing the Impact of Supplementary Cementitious Material and Polypropylene Fiber on the Fresh, Mechanical Properties, and Acid Attack of Quaternary Blended Self Compacting Concrete

Analyzing the Impact of Supplementary Cementitious Material and Polypropylene Fiber on the Fresh, Mechanical Properties, and Acid Attack of Quaternary Blended Self Compacting Concrete

"Characterization of Calcined Clay Blended Self Compacting Concrete-Correlation between Superplasticizer dosage and Self-Compacting Concrete Properties"

"Characterization of Calcined Clay Blended Self Compacting Concrete-Correlation between Superplasticizer dosage and Self-Compacting Concrete Properties"

Influence of stress-strain behaviour of quaternary blended self compacting concrete for sustainable construction

High Performance Concrete (HPC) had already gained in popularity throughout the last decade. Concrete strength is not synonymous with HPC. It has multiple criteria apart from strength. That includes the concrete’s elasticity, solidity, longevity & resistance towards certain varieties of assault. Raising structures in a harsh atmosphere really need adoption of HPC. For both the reasonable planning & assessment of a structural concrete, a complete stress-strain curve is important. Concrete buildings constructed in difficult climates, in especially, routine maintenance due to the cost of design and indeed the challenge of replacement. Like a consequence, for efficient planning & restoration, a very well stress-strain graph is recommended. Many research’s had also demonstrated the utility of fibres in strengthening the characteristics of concrete. self compacting concrete(SCC) integrates the capabilities of self compacting concrete in its fresh form with performance improvements in the hardened stage attributable towards the incorporation with fibres. An effort was made throughout this work to explore the stress-strain performance of SCC using quaternary blended self compacting concrete(QBSCC). Relying on the Nan-Su technique, a strength-based mix % of SCC was established & indeed the proportion got quite well employing Okamura’s parameters. Mixes with various admixtures such as fly ash, GGBS, Micro silica were investigated for 0.30 & 0.40 w/b ratios. In this work, incorporating mineral admixtures in SCC mixes to optimal content resulted in a max improvement in ultimate load at early ages of hardened concrete leading towards sustainable development all over the world.

Using Blended Self- Regulated Learning for Developing EFL Student Teachers' Creative Writing Skills and Attitudes towards Writing

Using Blended Self- Regulated Learning for Developing EFL Student Teachers' Creative Writing Skills and Attitudes towards Writing

Applying ANN – PSO algorithm to maximize the compressive strength and split tensile strength of blended self curing concrete on the impact of supplementary cementitious materials

Applying ANN – PSO algorithm to maximize the compressive strength and split tensile strength of blended self curing concrete on the impact of supplementary cementitious materials

Influence of mineral admixtures on structural behaviour of Quaternary Blended Self Compacting Concrete reinforced beams with addition of crimpled steel fibers

An effort is made to use supplementary cementitious material as a replacement in cement to improve the environmental friendliness of the concrete industry. In self-compacting concrete, fly ash, GGBS, and microsilica are also used to replace cement as much as feasible. However cement content in SCC is more which obviously causes environmental impacts such as emission of CO2 into the atmosphere is linked up with cement manufacturing and it is causing environmental pollution in terms of Green House Gases, Global Warming and is associated with climatic changes globally. To reduce these effects due to production of cement, introducing high volume mineral admixture or supplementary cementitious materials as a partial replacement to cement minimizes the binder content and improves the comparable properties with conventional self compacting concrete leading to Sustainable development in concrete industry. In the part of the investigation of QBSCC characteristics, steel fibres are added to Reinforced Self-Compacting Quaternary Blended Concrete (QBSCC). It improves flexural behaviour as that of control self compacting concrete for different water binder ratios. The findings shows that the strength of Fiber Reinforced QBSCC were increased w.r.t Control mixes. In this paper, experimental investigations were carried out on Flexural behaviour of Steel Fiber Quaternary Blended Self Compacting Concrete (SFQBSCC) by incorporating mineral admixtures or byproducts from industries such as Flyash (FA), Ground Granulated Blast Furnace Slag (GGBS) and Micro silica (MS) with addition of steel fibers from 0% to 1.5% for 0.30 & 0.40 water binder ratios w.r.t SCC. Quaternary blended SCC mixes containing 40% cement, 25%, FA, 25% GGBS, &10% MS with w/b 0.40&0.30 ratios achieved consistency and strength w.r.t SCC of similar w/b ratios.

Mechanical performance of sustainable ternary blended self compacting concrete with waste crushed glass

This experimental study was focused on mechanical properties of self-compacting concrete partial substitution of sand with waste glass. SCC is prepared with fly-ash (15%), Alccofine (20%), Cement (65%) by weight of binder material. These proportions are fixed for all the mixes. Waste crushed glass has enough amount of amorphous silica content which is easily replaced by fine aggregate in self-consolidating concrete. The Proportions taken for the replacement of the waste crushed glass are 0%, 10%, 20%, 30% and 40%. Grade of concrete taken was M70 and W/C 0.3 and the fresh properties studied for all concrete mixes. Cube Specimens for strength in compression (100 mm × 100 mm × 100 mm), Cylinders specimens in split tensile (100 mm × 200 mm) casted and tested at 7, 28, 90 days, Flexural beam size (700 mm × 150 mm × 150 mm) are casted to know the flexural behaviour at 28, 90 days. Beams are designed as under reinforced sections. The results are compared with self-compacting control mix and replacement of natural sand using waste crushed glass. The results shown increasing crushed glass content increasing workability of concrete and strength up to 30% of substitution of glass.

Influence of wollastonite - GGBS on properties of ternary blended self compacting concrete

In an innovative world self compacting concrete exhibiting significant role over conventional concrete with its excellent functionalities with capability to stretch to all corners under its own mass which empowers reliable quality with an astonishing finish. In order to produce such a durable concrete materials namely admixtures were added, these materials not only helps reducing the expenditure of cement but also exhibit their salient impact on properties of concrete. Wollastonite being a multi-functional material is a natural occurring mineral shaped as an output of interactivity between limestone and silica in hot magma. This paper reports on infliction of both wollastonite and GGBS as partial replacement to cement by mass for M30 grade of self compacting concrete with up to 0–25% with an interval of 5% where as GGBS content 20% kept constant thorough out the study, several tests were executed on both freshly mixed state to get SCC workability parameters, and in dry state to get desired outcome on account of mechanical properties trails were directed under characteristics of strength are compression, flexure and spilt tensile, acid attack and sorptivity assessments were guided on a perspective to get durable aspects. Experimental findings were indicated that substitution level of wollastonite up to 15% when blended with 20% GGBS content shown superiority in results.

Durability properties of self-compacting concrete developed with fly ash and ultra fine natural steatite powder

Abstract One of the major reason people choose concrete structure is because of its durable nature. This paper brings out the experimental results on durability study of ternary blended Self compacting concrete (SCC). The minerals used in this study are fly ash (FA) - as partial replacement to cement and ultra-fine natural steatite powder (UFNSP) - as an addictive. FA is used as a partial replacement to cement in SCC at 10% and 20% by weight. In both of this replacement level UFNSP were added in various percentages like 0%, 5%, 10%, 15%, 20% and 25% by weight of powder content. Hence totally thirteen sets of specimens were casted and various durability studies like initial water absorption, saturated water absorption, effective porosity, sorptivity, rapid chloride penetration and bulk diffusion were studied. In this study the steatite and fly ash particles mainly contribute as filling material hence at higher percentage the same mitigates the voids, which is also noted in the calculation of effective porosity. This experimental investigation is further supported by the scanning electron microscope images. Increasing the replacement level, arrested the microcracks thereby improved the microstructure and showcased very less voids. The SEM images also indicated the formation of magnesium silicate hydrate gels which also contributed to the enhancement of durability properties.

Studies on strength parameters of blended self cured concrete with natural and manufactured sand on the impact of fly ash and ground granulated blast furnace slag

Construction companies now use manufactured sand instead of natural river sand in concrete for a day, where the exploration limitation applies to river sand along with the implementation rule. Water, meanwhile, is also the most prevalent aspect of the concrete manufacturing curing process, and it is now scarce for a few days due to a greater rise in human population growth. In contrast to the traditional curing process, self-curing concrete minimizes the use of potable water. In addition to chemical admixture with the mixture, this paper deals with the various studies of fresh and hardened concrete specimens and findings with the self-curing agent mixed with PEG 400 with Fly Ash and GGBFS in different proportions. The results for the various combinations of blended proportions are correlated with the substitution of manufactured sand (M-Sand) with river sand with both ordinary self-curing concrete and mixed self – curing concrete with M30 grade. Attempts have been made to study the properties of blended self – curing concrete with Manufactured Sand.

Evaluation of optimum dosage in blended self curing concrete on the impact of supplementary cementitious materials (scm’s) and durability studies on different proportions

Now a days, the shortage of potable water increases, for domestic and commercial purposes due to environmental conditions. Due to this scarcity, curing of concrete is affected and in this point of view water assets are more valuable every day and becomes more economical. Traditional Curing used for retaining moisture within the concrete elements during the early days and beyond to develop the desired properties in terms of strength & durability. To develop the modern era curing, a few of self-curing agents like Super Absorbent Polymers, Polyethylene Glycol (PEG 400) has been used for internal curing of concrete used for reducing the hydration process. In this experimental study, Supplementary Cementitious Materials like Class F Flyash, Silica Fume and Ground Granulated Blast Furnace Slag (GGBFS), have been casted for 65%+25%+15% (M2), 65%+20%+15% (M6), 65%+25%+10% (M10) and 65%+20%+15% (M11) of optimal mix proportions. The sorptivity assessments have being carried out on all blended mixes of Self Cured Concrete with size of 15 cm x 15cm x15cm. The pH value of the acidic medium was at 0.45 by submerging in acid, the specimen samples are brought out and were cleaned in repeatedly with water and kept in atmospheric condition for two days for constant weight and then the specimens are balanced using weighing scale and loss in weight and hence the percentage in loss of weight was premeditated within and after 28 days with different mix proportion of M30 grade of concrete supplementary cementitious materials like Flyash, Ground Granulated Blast Furnace Slag and Silica Fume with PEG 400 as 1% by its weight.

An art of Research on concrete-Ternary blended

In this research, we experiment a ternary blended concrete, which is a concrete with silica fumes, GGBS, and Fly ash. By using sika viscocrete we achieved self compacting also, so it is a ternary blended self compacting geo polymer concrete. Three mixes were chosen namely M1, M2 and M3. The alkaline activator with different molarities were tried to get the optimum strength. The strength factors such as compressive strength and split tensile strength were carried out; similarly the fresh concrete properties such as slump test, flow table test, V-funnel test, U-Box Test & L Box test were carried out. The strength properties are did 7 days and 28 days. This research is mainly focused on fresh concrete properties of ternary blended self compacting geo polymer concrete.

Investigation of strength and impact charecteristics of blended Self cured concrete

Concrete is widely accepted as a durable construction material and being used across the globe for Civil engineering construction. Production of concrete is proved to be unsustainable owing to high amount of CO2 release and solutions being promoted to make it sustainable, also concrete strength and durability enhancement needed to be envisaged due to increased demand. Several attempts were made to produce concrete using multiple admixtures, in this research work we had made an attempt to develop a Geopolymer based concrete ( cementless) by incorporating Ground granulated Blast Furnace slag and fly ash with alkaline binder solution prepared in different molarities ( 10M, 12M, 14M). The mixture is casted and tested for strength and impact resistance after curing for 28 days in sunlight (non-thermal curing). Promising results were obtained in this study with 11M and 14M solutions based geopolymer concrete showing good strength results concerned with compressive and impact strength. Specifically, designed impact strength testing equipment is used in this study which is a novel work done and a cylindrical specimen of 100 mm diameter and 50 mm thickness is used to study impact resistance of concrete.

Strength Behaviour of Blended Self Cured Concrete made with Cement by partial replacement of Supplementary Cementitious Materials (SCM’s)

At Present Water is the most essential material in the modern era. In general, Curing of concrete is retaining moisture in the concrete for the period of early ages precisely within 28 days of placing concrete, to improve anticipated properties. Appropriate curing of concrete is crucial to obtain extreme durability, especially if the concrete is exposed to serve conditions where the surface will be imperiled to excessive wear, assertive solutions, and severe environmental circumstances. Poor curing practices adversely affect the desirable properties of concrete which constitutes a major influence on the permeability of a given concrete.Unpredicted shrinkage and temperature cracks be able to diminish the strength, durability and serviceability properties of the concrete. The surface zone will be critically damaged by increased permeability expected to poor curing. The improvement of shrinkage in concrete is proportionate to the rate of moisture loss in concrete. When concrete is correctly cured, water preserved in concrete would facilitate continuous hydration and enhancement of enough compressive and tensile strength to withstand contraction stresses. The incessant development of strength reduces shrinkage and initial cracks or micro-cracks. As a part of this study, SCMs like Flyash (FA), Ground Granulated furnace Slag (GGBS), Silica Fume (SF). Concrete may be a mixture of cement, aggregates and water with / without suitable admixtures with self-curing agents and various proportions, which resulted in the early strength to reduce the autogenous shrinkage and increase in durability.

Effectiveness of alccofine and fly ash on mechanical properties of ternary blended self compacting concrete

The presence of self-compacting concrete (SCC) mix offers many advantages to the structural elements that cast by this type of mix. This paper presents the results on an experimental program carried to explore the possibility of fly ash and alccofine as partial replacement of cement in self-compacting concrete. SCC mixes were designed and cement was replaced with fly ash (i.e. 25%) and alccofine (5, 10 and 15%). Tests were performed to evaluate the compressive strength, split tensile strength and modulus of rupture of SCC. Results indicated that compressive strength, split tensile strength and modulus of rupture of self-compacting concrete improved with incorporation of 25% of fly ash and 10% of alccofine at all the curing ages.

Fresh, Strength and Durability Characteristics of Binary and Ternary Blended Self Compacting Concrete

Paper Mineral admixtures being the economical alternatives to Ordinary Portland Cement (OPC) for various normal and special concretes induce desirable properties to concrete such as higher flow, low heat of hydration, higher strength gain and enhanced durability. Ground granulated blast furnace slag(GGBFS) being one of the largely used mineral admixture alongside Fly Ash as supplementary cementitious material in concrete contributes to enhanced durability properties and low heat of hydration. Various replacement percentages of GGBS at 30%, 40%, 50% and 60% are used in binary blended Self compacting concrete(SCC) in the present study. At 40% replacement level, SCC exhibited improved workability, strength and durability properties. Alccofine(Ultrafine GGBS) used in ternary blended SCC enhanced early strength gain without affecting workability of SCC to a significant extent.

Estimation of Ground Granulated Blast Furnace Slag and Rice Husk Ash Cementing Efficiency in Low and Medium Grade Self-Compacting Concretes

Ternary blended Self Compacting Concrete (SCC) made with rice husk ash (RHA) and GGBFS (ground granulated blast furnace slag) has developed as a substitute to normal concrete. It has advantages such as less cement usage, energy usage, cost and for other ecological and socio-economic benefits. The current work quantifies the 3, 7 and 28-days cementitious efficiency for various percentages of RHA and GGBFS combination in SCC. The usage of GGBFS in M20 and M40 SCC reduces workability but increases compressive and tensile strength when compared with OPC based SCC. The optimum GGBFS is found to be 30% for low and medium strength levels of SCC. For M20 and M40, 30% GGBFS reduces workability slightly but still within desired limits. So after various trial mixes it was found that 27% GGBFS by weight of OPC and 3% RHA by weight of GGBFS quantity can be admixed to OPC SCC to achieve similar strength and workability and also better rate of strength regain in early days of hardening. In M20 and M40 grades of SCC, 3% RHA by weight of GGBFS quantity is replaced. Due to addition of GGBFS to SCC will enhance the later age compressive strength but early age compressive strength decreases while the desired workability is controlled using SP appropriately. This is true for all grades of GGBFS based SCC. In M20 GGBFS based SCC, the strength gain at 3 days is nearly 9% but the compressive strength at 28 days increased by 31%. In M40, GGBFS based SCC, the strength gain at 3 days is nearly 14% but the compressive strength at 28 days increased by 21%. RHA is added as replacement of cement to improve the early age strength of SCC. RHA addition to concrete as cement replacement may help to improve strength marginally but impacts the workability drastically so SP should be used controllably to attain the desired workability. In M20 GGBFS+RHA based SCC, the compressive strength enhancement at 3 days is 21% and the compressive strength at 28 days increased by 46%. In M40, GGBFS+RHA based SCC, the compressive strength enhancement at 3 days is 20% and at 28 days increased by 34%. Similarly tensile strength in all grades of GGBFS and RHA admixed SCC increases by around 15 to 34% in M20 grade and 9 to 36% in M40 grade SCC mix. So it can be concluded that RHA and GGBS combination principally yields early strength which is not possible in SCC mixes primary made with fly ash.

Strength and durability performance of self compacting concrete containing self-combusted rice husk ash and metakaolin

In this study, the effects of ternary system on corrosion behaviour of self compacting concrete containing self combusted rice husk ash (SCRHA) and metakaolin (MK) were studied. For that different mix proportions were prepared by replacing ordinary Portland cement (OPC) with SCRHA and MK. The OPC was replaced from 0% to 30% by SCRHA or MK as a binary system, whereas from 0% to 40% by SCRHA and MK as ternary system. In order to assess the properties of blended self compacting concrete (SCC), various tests were conducted for fresh state properties (Slump flow test, V-funnel test and L-box test), Strength properties (Compressive strength and splitting tensile strength) and durability properties (Rapid chloride penetration test and potential time study for steel corrosion). From the test results, 15%SCRHA, 10%MK and 10%SCRHA + 10%MK blended SCC showed good performance against all fresh, strength and durability properties. The test results also indicated that OPC properties can be effectively modified by the ternary system of SCRHA and MK and enhance various SCC properties.

Effect of Freezing and Thawing on Quaternary Blended Self Compacting Concrete Using Mineral Admixtures

Effect of Freezing and Thawing on Quaternary Blended Self Compacting Concrete Using Mineral Admixtures

Impact And Permeability Properties of Fibrous Triple Blended Self Compacting Concrete.

Impact And Permeability Properties of Fibrous Triple Blended Self Compacting Concrete.