scholarly journals Mechanical and Durability Properties of No Aggregate Concrete using Silica Fume

2020 ◽  
Vol 9 (3) ◽  
pp. 246-249
Keyword(s):  
Mechanical Properties ◽  
20Th Century ◽  
Silica Fume ◽  
Rapid Growth ◽  
Research Work ◽  
Chemical Durability ◽  
Mix Design ◽  
Waste Products ◽  
Aggregate Concrete ◽  
Durability Properties

India is a developing country which has been showing an enormous growth in different aspects like industrialization, urbanization and communication since 20th century. This development is leading to the decay of environment by polluting it. The huge disposal of various waste products from different industries is playing a prominent role in the rapid growth of pollution. No aggregate concrete (NAC) is another kind of concrete where the utilization of totals are completely maintained a strategic distance from for safeguarding the regular stone, hillocks and slopes. The utilization of sand is additionally maintained a strategic distance from to save the waterway beds. This is a regular research work serving the plan of economical advancement. To reduce the use of aggregates in concrete, No Aggregate Concrete for different grades of concrete is desired. The purpose of this project is to obtain mix design, understand Mechanical properties and Chemical durability properties of different mixes developed.

scholarly journals Effect of Silica Fume on Mechanical and Durability Properties of Recycled Coarse Aggregate Concrete

2019 ◽  
Vol 8 (4S2) ◽  
pp. 68-72
Keyword(s):  
Silica Fume ◽  
Coarse Aggregate ◽  
Mineral Admixture ◽  
Mix Design ◽  
Recycle Aggregate ◽  
Aggregate Concrete ◽  
Durability Properties ◽  
Natural Aggregate ◽  
Water Sorptivity ◽  
Sorptivity Test

Reusing concrete is the best choice to diminish the eagerness on mind blowing standard assets and to oblige the total of waste which is engineered in landfills. Reused concrete has been regularly used as an unbound material as a touch of dams, bases, and sub-bases. RAC has in like way been utilized as a piece of the improvement of asphalts and wastes yet in less case as the examination in this field is not the most outrageous utmost of RAC has not yet been investigated. In this investigation the reused total was utilized as supplanting with 20%, 40%, 60% and 80% by substitution of typical aggregate. Standard Ordinary Portland cement was supplanted with 10% of mineral admixture silica fume. Tests were coordinated to choose the mechanical properties and durability properties such us rapid chloride penetrability test and water sorptivity test. The results show that increasing the recycle aggregate percentage above 40% with natural aggregate, small modifications to the mix design may be adopted to secure that comparable property to natural aggregate concrete is attained

Performance Enhancement of Recycled Aggregate Concrete – An Experimental Study

2021 ◽  
Author(s):  
Sivamani Jagan ◽  
Thurvas Renganathan Neelakantan ◽  
Palaniraj Saravanakumar
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Elastic Modulus ◽  
Performance Enhancement ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Aggregate Concrete ◽  
Coarse Aggregates ◽  
Durability Properties ◽  
Concrete Mixtures

Extensive studies have been performed on the mechanical and durability properties of the concrete prepared with recycled coarse aggregates (RCA), however, only modest consideration has been given to the studies on the behaviour of RAC prepared by alternative mixing approach techniques. This study presents the mechanical properties of the recycled aggregate concrete (RAC) with different percentages of RCA prepared by normal mixing approach (NMA), two-stage mixing approach (TSMA) and sand enveloped mixing approach (SEMA) techniques. The manufactured concrete mixtures were tested for compression, tension, flexure and elastic modulus at 7, 28 and 90 days. The results indicate that the mechanical properties of the RAC (with 100% of RCA) prepared through TSMA and SEMA were improved by 9.36 and 12.14% at 28 days. Perhaps, prolonged curing to TSMA and SEMA mixtures improved the mechanical properties of the RAC that is nearly equal to normal aggregate concrete (NAC) prepared by NMA.

scholarly journals Evaluation of admixture effect on strength and durability properties of concrete - a critical review

2018 ◽  
Vol 7 (2.1) ◽  
pp. 28
Author(s):  
Mahesh V ◽  
Hemalatha Chemalapati ◽  
Vani A ◽  
Sreenivasulu Dandagala
Keyword(s):  
Research Work ◽  
Bentonite Clay ◽  
Waste Material ◽  
Cow Dung ◽  
Waste Products ◽  
Durability Properties ◽  
Stone Dust ◽  
The World ◽  
Egg Shell ◽  
Strength And Durability

The present paper is focused on the study of admixture effect on strength and durability properties of concrete. In this study selected admixtures bentonite clay, coconut shell, cow dung ash, crushed rubber, egg shell, glass powder, groundnut shells, rich husk, stone dust, sugar bagasse etc., research papers has been reviewed. Inspite of several usage of waste, presently millions of tons are produced every year and remain unused all around the world and causes serious environment problems. Utilization of waste products all over the world has become challenging task for civil engineers. High costs of cements are not economical for all the types of construction works. Therefore, it is necessary to utilize the locally available materials for improving the properties of concrete in the field of construction industry. The usage of different waste material for the improvement of concrete properties has drawn much attention to the researchers. Moreover, several researchers were made an investigation on laboratory tests on partial and fully replacement of cement, sand, aggregate in concrete and various properties like workability, compressive strength, and density are studied. Based on the research work carried out several researchers we can conclude that the utilization of different usage of waste material as resources and prevents environmental pollution. It is also observed that waste materials can be used as an alternate material for the better improvement of strength and durability properties of concrete.

scholarly journals Impact of Silica Nanoparticles on the Durability of fly Ash Concrete

2021 ◽  
Vol 7 ◽  
Author(s):  
D. Ali ◽  
U. Sharma ◽  
R. Singh ◽  
L. P. Singh
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Silica Nanoparticles ◽  
Silica Fume ◽  
Silica Nanoparticle ◽  
Fly Ash Concrete ◽  
Durability Properties ◽  
Concrete Mix

In the present study, the mechanical and durability properties of silica nanoparticle (SNP)-incorporated fly ash (FA) concrete mix were examined after 365 days of exposure. The dosages of FA replaced by cement in the present study were 30%, 40%, and 50%, while 3% SNPs were added by the weight of cement in the FA incorporated mix. For a comparison of SNPs with silica fume (SF), 6% SF was added (by the weight of cement) and entire casting was performed at a constant water to binder (w/b) ratio of 0.29. The present work is the extension of a previous study wherein durability properties of the same mixes were reported for up to 180 days of exposure. Compressive strength results show that in the presence of SNPs, the enhancement in compressive strength was in the range of 10–14%, while, in presence of SF, 8–10% of the enhancement was observed as compared to control. However, exposed samples in a carbonation environment showed that the compressive strength of the control and SF incorporated mix increased, while SNP-incorporated samples showed negligible enhancement. Further, sulphate exposed mix show that compressive strength decreases, however, the SNP-incorporated mix showed the lowest reduction compared to other mixes. Therefore, the study shows that the SNP-incorporated mix has higher mechanical properties and more durability compared to other mixes in a severe environment.

scholarly journals Influence of Silica Fume on Mechanical Properties of Crumb Rubber Aggregate Concrete

2016 ◽  
Vol V5 (12) ◽  
Author(s):  
Dr. M. Sivakumar ◽  
Ms. M. Poorani ◽  
Ms. S. Jeya Sudha ◽  
Ms. S. Deepa ◽  
Keyword(s):  
Mechanical Properties ◽  
Silica Fume ◽  
Crumb Rubber ◽  
Aggregate Concrete

Effect of silica fume on the mechanical properties of low quality coarse aggregate concrete

2004 ◽  
Vol 26 (7) ◽  
pp. 891-900 ◽  
Author(s):  
Abdullah A. Almusallam ◽  
Hamoud Beshr ◽  
Mohammed Maslehuddin ◽  
Omar S.B. Al-Amoudi
Keyword(s):  
Mechanical Properties ◽  
Silica Fume ◽  
Coarse Aggregate ◽  
Aggregate Concrete

The potency of recycled aggregate in new concrete: a review

2019 ◽  
Vol 19 (4) ◽  
pp. 594-613 ◽  
Author(s):  
Emmanuel Ejiofor Anike ◽  
Messaoud Saidani ◽  
Eshmaiel Ganjian ◽  
Mark Tyrer ◽  
Adegoke Omotayo Olubanwo
Keyword(s):  
Research Work ◽  
Recycled Aggregate Concrete ◽  
Construction And Demolition Waste ◽  
Recycled Aggregate ◽  
Mix Design ◽  
Recycled Aggregates ◽  
Demolition Waste ◽  
Aggregate Concrete ◽  
Content Type ◽  
Natural Aggregate

Purpose This paper aims to review the effect of using recycled aggregates (RA) on the properties of recycled aggregate concrete (RAC) following the steady rise in global demand for concrete and the large generation of construction and demolition waste. Design/methodology/approach This study reviewed relevant literature of research work carried out by previous researchers, leading to a deeper understanding of the properties of both RA and RAC. The properties of RA and RAC reported in the various studies were then compared to their corresponding natural aggregate (NA) and natural aggregate concrete, as well as the specifications provided in different codes of practice. In addition, the mix design methods appropriate to RAC and the cost implication of using RA were reviewed. Findings Findings show that the contribution of RA to strength appears inferior in comparison to NA. The shortcoming is attributed to the mortar attached to the RA, which raises its water absorption capacity and lowers its density relative to those of NA. However, it has been reported that the use of regulated quantity of RA, new mixing and proportioning methods, the addition of admixtures and strengthening materials such as steel fibres, can improve both mechanical and durability properties of RAC. Cost evaluation also showed that some savings can be realized by using RA instead of NA. Originality/value This research serves as a guide for future works and suggests that the use of RA as aggregate in new concrete is technically possible, depending on the mix design method adopted.

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