Study on effect of colloidal Nano silica blended con-crete  under compression

Reddy, A. Narender; Meena, T.

doi:10.14419/ijet.v7i1.9538

Cited by 4 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alccofine is an ultra-fine material which is significantly superior to other mineral admixtures which are available in market [15][16][17][18][19][20][21][22][23][24][25][26][27]. In this research, the replacement of cement with alccofine was 25% for all mixes.…”

Section: Alccofinementioning

confidence: 92%

Development of high early strength in concrete incorporating alccofine and non-chloride accelerator

Reddy

Naqash

2019

SN Appl. Sci.

View full text Add to dashboard Cite

Rapid repair and retrofit of existing infrastructures demand durable high early strength materials that not only deliver sufficient strength within a short time after placement but also significantly prolong the maintenance interval. This research paper presents the effects on the mechanical properties and durability of alccofine concrete of the addition of calcium nitrate as a non-chloride hardening accelerator (NCHA). Non-chloride accelerator with concentrations of 0.65%, 0.85% and 1.05% by weight of cement, was added to concrete mixes to test the effect on the properties of alccofine concrete which was in turn compared with the reference concrete without NCHA. With addition of accelerator, strength enhancements were observed at an early age due to rapid rate of hydration of C 3 A and C 3 S phases. Water absorption and sulphate resistance of alccofine concrete also improved with the non-chloride accelerator. A statistical tool was used to predict the experimental values of compressive strength of concrete. Response surface methodology was adopted to optimize the experimental data set in which regression equation was developed by relating response variable to input variable. This method helped to predict the experimental values within an acceptable error range. The predicted values were cross validated by employing coefficient of determination (R 2 ) and residual sum of squares (RSS) which showed a good fit. The results of this study showed that the addition of non-chloride hardening accelerator in alccofine concrete significantly improved the mechanical properties as well as durability.

show abstract

Section: Alccofinementioning

confidence: 92%

Development of high early strength in concrete incorporating alccofine and non-chloride accelerator

Reddy

Naqash

2019

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…During cement production large amount of CO 2 released into the atmosphere (1) . When supplementary materials added to concrete then the unreacted calcium and silica are reacting with water to form additional C-S-H gel , and hence improves the bonding between the cementitious matrix (2) .…”

Section: Motivationmentioning

confidence: 99%

“…Hence, it detract the concrete density and compressive strength. A Narendra Reddy et al (2) experimented on concrete in which cement partially replaced by alccofine, GGBS and flyash. From the test results, the optimum replacement of 10% alccofine along with 25% flyash improved the strength.…”

Section: Compressive Strengthmentioning

confidence: 99%

Performance Evaluation of Fibre Reinforced Concrete Containing Alccofine and Zeolite

Meenatchi¹,

Suguna²,

Raghunath³

2023

IJST

View full text Add to dashboard Cite

Objectives:The intent of the study is to assess the strength and durability behavior of concrete specimens attaining micro fillers such as alccofine and zeolite and micro reinforcement in the form of polypropylene fibres. Methods: Polypropylene fibres were added in volume fractions of 0%,0.1%, 0.2%, 0.3% and 0.4%. The mechanical properties of concrete such as compressive strength, modulus of elasticity and flexural strength were obtained for concrete mixes with and without PP fibres through standard testing procedure. Some durability properties such as water absorption, porosity, sorptivity, acid resistance were also examined. Appropriating instrumentation has been adopted for making the measurements pertaining to the above parameters. Findings: Introduction of micro fillers and polypropylene fibres caused a significant effect on as compressive strength, modulus of elasticity, flexural strength, water absorption, porosity, sorptivity, and acid resistance. The results indicated that inclusion of polypropylene fibers exhibit maximum increase of 15.15% and 14.87% has been realized in the compressive strength of cube and cylinder, a maximum increase of 10.47% in flexural strength and 14.35% in elasticity modulus through the inclusion of polypropylene fibre. Novelty: The article reveals that inclusion of micro fillers and polypropylene fibre reinforced concrete in public spaces is a promising practice, since they are impacted by adverse environmental conditions, suffer surface degradation, and are the target of vandalism. It is clear that using concrete with improved characteristics will be advantageous.

show abstract

“…The compressive strength of concrete at later age (28 days) for mixes AF1, AF2, and AF3 was also found to have improved by 5.26%, 2.97% and 2.32% compared to NM1, NM2 and NM3 respectively. Alccofine did not only act as a filler material to increase density of concrete but also improved the hydration process to enhance strength properties [19,20]. From results, it was observed that the compressive strength of concrete increases with alccofine compared to conventional concrete at all ages.…”

Section: Compressive Strengthmentioning

confidence: 99%

Properties of Concrete Modified with Ultra-Fine Slag

Reddy¹,

Naqash²

2019

Karbala International Journal of Modern Science

View full text Add to dashboard Cite

The supplementary cementitious materials (SCM) can be used as a replacement of cement in the construction industry to minimize the drawbacks of normal concrete such as the emission of carbon dioxide so as to be eco-friendly. This paper presents the effect of ultra-fine slag (i.e. 25% of alccofine) as a replacement of cement for different water to binder ratios (i.e. 0.38, 0.4 and 0.45). The effect of alccofine on the concrete strength properties were studied at 7 and 28 days wherein considerable strength enhancement was observed compared to normal concrete. Thermogravimetric analysis was also carried out in which mass loss and decomposition of hydration products from concrete was determined. X-ray diffraction showed the crystalline forms of ettringite and calcium silicate hydrate. Therefore, it was concluded from this study that alccofine can be used as a viable substitute to cement in normal concrete considering its positive effects on property enhancement and eco-friendless.

show abstract

Study on effect of colloidal Nano silica blended con-crete under compression

Cited by 4 publications

References 4 publications

Development of high early strength in concrete incorporating alccofine and non-chloride accelerator

Development of high early strength in concrete incorporating alccofine and non-chloride accelerator

Performance Evaluation of Fibre Reinforced Concrete Containing Alccofine and Zeolite

Properties of Concrete Modified with Ultra-Fine Slag

Contact Info

Product

Resources

About