scholarly journals Durability Properties of Self Compacting Concrete by using M-Sand as Fine Aggregate

2019 ◽  
Vol 8 (3) ◽  
pp. 8354-8358
Keyword(s):  
Fine Aggregate ◽  
Self Compacting Concrete ◽  
River Sand ◽  
Natural Sand ◽  
Manufactured Sand ◽  
Durability Properties ◽  
Fine Aggregates ◽  
Alternative Material ◽  
Chloride Attack ◽  
Level Constant

Self-compacting concrete is also called as self consolidated concrete which does not require vibration for placing and compaction. In the present trend scarcity of natural sand become a huge problem to construction industry, inorder to reduce this problem alternatives are used, one of the alternative material is Manufactured sand. Manufactured sand is produced from hard granite stone by crushing. There are two reasons to M-sand i.e, availability & transportation. An attempt was made to evaluate the workability and strength characteristics & durability properties of self compacting concrete with river sand and manufactured sand as fine aggregates. For each replacement level, constant workability was maintained by varying the dosage of superplasticizer. Sulphate attack and chloride attack of the specimens were determined. Different proportions of solution are used for durability study.

scholarly journals Studies on manufactured sand effect on mechanical properties of geopolymer concrete as replacement of river sand in fine aggregate

2021 ◽  
Vol 309 ◽  
pp. 01114
Author(s):  
K. Veera Babu ◽  
T. Srinivas ◽  
Mahathi Tummala
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Construction Material ◽  
Environmental Concerns ◽  
Fine Aggregate ◽  
Geopolymer Concrete ◽  
River Sand ◽  
Natural Sand ◽  
Manufactured Sand ◽  
Low Calcium

Concrete is the most adaptable, long-lasting, and dependable construction material on the planet. There are numerous environmental concerns associated with the production of OPC, and natural sand is becoming more expensive and scarce as a result of unlawful river sand dredging. The greatest replacement material for traditional concrete is geopolymer concrete with low calcium fly ash. The purpose of this paper is to investigate the mechanical properties of geopolymer concrete of grades G30 and G50, which are equivalent to M30 and M50, when river sand is substituted in various quantities with manufactured sand, such as 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%. When compared to the equivalent grades of controlled concrete, geopolymer concrete improves mechanical properties such as compressive, tensile, and flexural strengths.

scholarly journals Feasibility Study on the Utilization of Manufactured Sand as a Partial Replacement for River Sand

2021 ◽  
Keyword(s):  
Sodium Sulphate ◽  
Sediment Supply ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Freezing And Thawing ◽  
River Sand ◽  
Natural Sand ◽  
Manufactured Sand ◽  
Loss Of Weight ◽  
Huge Impact

Abstract. Continuous extraction of sand is having a huge impact on the natural river beds which has resulted in lowering of water table and a decrease in the amount of sediment supply. Despite the quantity of sand used in our day-to-day activities, our dependence on sand is significantly increasing. The use of manufactured sand as a fine aggregate in concrete draws the attention of many investigators and researchers. The present investigation includes the study of soundness and EDAX .The test results depicted that for M-sand substituted concrete the loss of weight, when subjected to alternate cycles of freezing and thawing when tested with magnesium and sodium sulphate solution was found to be less when compared with natural sand. The important observation is that the inclusion of manufactured sand in concrete reduces the pores present in concrete resulting in matrix densification and makes the concrete impermeable and substantially reduces the rate of oxygen diffusion and reduces the corrosion process as well. This paper also focuses on the effect of manufactured sand as a fine aggregate in the elastic and bond characteristics of concrete.

Behaviour of Conventional Concrete Treated with Robo Sand and Iron Shavings

2021 ◽  
Vol 1019 ◽  
pp. 110-117
Author(s):  
D. Sathyanarayana ◽  
R. Padmapriya
Keyword(s):  
Matrix Material ◽  
Fine Aggregate ◽  
Natural Sand ◽  
Conventional Concrete ◽  
Total N ◽  
Manufactured Sand ◽  
The Matrix ◽  
Alternative Material ◽  
Construction Purpose ◽  
Land Sliding

This paper deals with impact of M-sand utilization rather than ordinary fine total (N-Sand) and iron shavings as far as volume of cement to improve the elastic nature of the matrix material. Basically, concrete is a composite material invented in ancient period for construction purpose. Out of the total volume of concrete 30% of volume filled with fine aggregate which is brought from digging of rivers, lakes, and canals, which causes serious tread to environment by land sliding. Now this research is carried out to identify the suitability of alternative material instead of natural sand. In this context manufactured sand produced from crushing of basalt stone is being replaced in various percentages as 0%, 20%, 40%, 60%, 80% and 100% in the place of natural sand for M25 Grade concrete. Also Iron shavings was added at 0%, 2%, 4%, 6%, 8% and 10% for total volume of concrete.

scholarly journals Synthesis and Characterization of Synthetic Sand by Geopolymerization of Industrial Wastes (Fly ash& GGBS) Replacing the Natural River Sand

2021 ◽  
Author(s):  
Lizia Thankam Gnanadurai ◽  
Neelakantan Thruvas Renganathan ◽  
Christopher Gnanaraj Selvaraj
Keyword(s):  
Fly Ash ◽  
Xrd Analysis ◽  
Optical Microscope ◽  
Industrial Wastes ◽  
Fine Aggregate ◽  
River Sand ◽  
Natural Sand ◽  
Aquatic Life ◽  
Mountain Ranges ◽  
Fine Aggregates

Abstract The diminution of the natural sources in the form of dredging the riverbanks and blasting the mountain ranges has always dented the balance of the eco system which in turn results in disasters as well at times. This alarming situation accelerates the global warming, threatens the biota life in riverbanks, diminishes the ground water level, harms the aquatic life and affects the growth of agriculture. This study is an attempt to synthesis fine aggregates from the industrial byproducts such as fly ash and GGBS through the process of geopolymerization which enables the formation of aluminosilicate networks upon the addition of the alkaline activator solution (Na 2 SiO 3 + NaOH) into the byproducts which is then allowed for oven drying as well as air drying to accelerate the process. The Fly ash geopolymerized fine aggregate(F-GFA) and the GGBS geopolymerized fine aggregate(G-GFA) were noted to exhibit adequate physiochemical and mechanical properties in par with the natural sand. The production of GFA is considered as eco friendly process since it ceases the extensive usage of river sand and incorporates the effective usage of Industrial by products (Fly ash and GGBS) thereby minimizing the land pollution and its consequent harmful hazards. Though the F-GFA and G-GFA showcased higher water absorption ratio than the natural sand, owing to the unreacted fly ash and GGBS particles. Nevertheless, the same initiated the adequate compressive strength attainment up to 90% of natural sand, by reacting with the lime expelled out of the hydration process of cement in the mortar specimens developed in this experimental study. The microstructure of the samples was further examined through Optical microscope, Scanning Electron microscope (SEM) and X-Ray Diffraction (XRD) analysis in order to corroborate the experimental results of this study. The results thus obtained, strongly recommend the potential of the F-GFA and G-GFA as an ideal replacement material for natural sand.

scholarly journals Replacement of Sand by Quarry Dust in Concrete

2021 ◽  
Vol 9 (VI) ◽  
pp. 1043-1045
Author(s):  
Suraj V Borsare
Keyword(s):  
Compressive Strength ◽  
Raw Materials ◽  
Experimental Result ◽  
Fine Aggregate ◽  
Cement Concrete ◽  
River Sand ◽  
Natural Sand ◽  
Alternative Material ◽  
Sand And Gravel ◽  
Quarry Dust

The role of quarry dust in the construction of building and other structures to eliminate the demand of nature sand by using quarry waste to replace the use of natural sand. We are investigating the potential of using quarry waste and its effect on the strength and workability of concrete. Initially cement concrete cube was studied with various proportion of cement concrete +quarry dust (M20 & M25). The experimental result showed that the additional of quarry dust as fine aggregate ratio of 30%, 40% and 50% was found to enhance the compressive properties. The compressive strength of concrete cubes at the age of 7 and 28 days were obtained at room temperature. These raw materials of concrete, i.e., river sand and gravel, are also struggling to cope with the rapidly growing demand in many areas around the globe. The sources of good quality river sand and gravel are depleting very fast. According to United Nations Environment Program (UNEP) report, “Sand-rarer than one thinks”, published in March2014, sand and gravel has now become the most widely used natural resource on the planet after water. These are now being extracted at a rate far greater than their renewal. Crushed sands, fine aggregate produced from stone crushing, has become very popular in areas where natural sand is not abundantly available or where there is scarcity in the supply of natural sand. The Mumbai-Pune express highway was a project, where there is a difficulty in procurement of natural sand. This made the construction company to use crushed sand for making approximately 20 lakh cum of concrete necessary for the construction. However, such type of sands contains a large amount of micro-fines, i.e., particles finer than 75 microns, which can have an adverse effect on properties of concrete. So proportioning of different raw materials at the time of mix design is very important, when crushed sand is used in concrete The availability of sand at low cost as a fine aggregate in concrete is not suitable and that is the reason to search for an alternative material. Quarry dust satisfies the reason behind the alternative material as a substitute for sand at very low costIt is found that 40% replacement of fine aggregate by quarry dust gives maximum result in strength than normal concrete and then decreases from 50%. The compressive strength is quantified for varying percentage and grades of concrete by replacement of sand with quarry dust.

Effects of Incorporating Dune Sand as Fine Aggregate Replacement in Self-Compacting Concrete

2015 ◽  
Vol 668 ◽  
pp. 189-196 ◽  
Author(s):  
Enas Khattab
Keyword(s):  
Cement Content ◽  
Technical Specification ◽  
Maximum Size ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Dune Sand ◽  
Self Compacting Concrete ◽  
Natural Sand ◽  
Fine Aggregates ◽  
Hardened Properties

The aim of this study is to investigate the effects of incorporating dune sand as fine aggregates replacement in self-compacting concrete. Twelve mixes were cast and tested for both fresh and hardened properties. The mixes were divided into 2 groups: Each group comprised six mixes. The constituent materials were as follows: Normal Portland cement CEM Ι 42,5N, dolomite as coarse aggregates of maximum size 10 mm, medium-sized sand, silica fume was 10% by weight of cement. Coarse: fine aggregates ratio was 1:1. Admixture which complies with ASTM C494 Types G and F was used in the 12 mixes (3.5% by weight of cement ).Dune sand replaced natural sand by zero %,10%,25%,50%, 75%,and 100% respectively .For , the first group (Group A), the cement content was 350 Kg/m3, while for the second group (Group B), the cement content was 400 Kg/m3.Tests carried out on fresh self-compacting concrete were slump flow,T50cm ,V-funnel, V-funnel t5min ,and GTM screen stability test . Tests conducted on hardened concrete were compressive strength at ages 7 and 28 days, flexural, and splitting tensile strengths were also conducted at age 28 days. The obtained results showed that the fresh properties satisfied the Egyptian Technical Specification limits. Regarding the hardened properties, both 28 days compressive and flexural strengths exhibited improvement till 50% replacement when compared to their respective control mixes.

scholarly journals Mechanical Properties of High Calcium Flyash- GGBFS Geopolymer Paste, Mortar and the Effect of Glass Fibre Mesh on the Strength of Geopolymer Mortar Tile

2020 ◽  
Vol 9 (6) ◽  
pp. 722-729
Keyword(s):  
Glass Fibre ◽  
Demolition Waste ◽  
River Sand ◽  
Manufactured Sand ◽  
Granulated Blast Furnace Slag ◽  
Fine Aggregates ◽  
High Calcium ◽  
High Calcium Fly Ash ◽  
Fibre Mesh ◽  
Geopolymer Paste

In this paper, a combination of high-calcium fly ash (HCFA) and ground granulated blast furnace slag (GGBFS) was used along with a combination of sodium hydroxide (NaOH) and sodium silicate(Na2SiO3 ) as alkaline activators (AAs) to produce geopolymer paste and mortar. The alkaline activator ratio (AAR) was maintained at 1.5 apart from their molarity at 10 for the study. A rational method, namely minimum voids approach was used for the mix design. A commercially available glass fibre mesh was used as reinforcement in the geopolymer mortar produced above, to assess its potential for use as a flooring tile. The influence of W/S (water-to-solids) ratio and the influence of various fine aggregates, namely, river sand (R), manufactured sand (M) and construction demolition waste (D) on the various geopolymer system (GP) and on the strength characteristics, are highlighted. A maximum transverse strength (TS) of 6.25 N/mm2 could be attained by the geopolymer tile, using three layers of glass fibre mesh and GP mortar developed. The study indicates that a combination of FA and GGBFS helps us to attain substantial strength under ambient temperature in geopolymer mortar

scholarly journals Mechanical and Durability Properties of Fibre Reinforced Concrete made with OPC, GGBS and Metakaolin

2019 ◽  
Vol 8 (10) ◽  
pp. 3286-3290
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Industrial Wastes ◽  
Test Results ◽  
River Sand ◽  
Manufactured Sand ◽  
Durability Properties ◽  
Strength Tests ◽  
Massive Scale ◽  
Strength And Durability

Concrete is a globally utilized material in the construction field. In the last few decades, Concrete consumption has become multifold and usage has enhanced in massive scale due to the rapid growth of infra sector. Generally, Concrete consists of cement, aggregate, and water; these ingredients become more expensive day by day and additionally hard to please and is increasing widely. During the process of making Ordinary Portland Cement(OPC) produces a large amount of greenhouse gases and the environment being polluted. To minimize the cement utilization and environmental issues is essential to switch the cement by another alternate materials such as pozzolanas. The various number of pozzolanic materials comes from industrial wastes are Groundz Granulatedz Blastz furnacez Slagz (GGBS), xFlyqAsh (FA), zSilicazFume (SF), Metakaolin (MK) etc are utilized in concrete. Similarly, the availability of river sand is getting drained furthermore it turns out troublesome. In order to avoid this problem river sand is alter by zManufacturedkSand (M Sand). An attempt is made in the present investigation to study on properties of fiber reinforced concrete (qsteelu fibers @ 1% of binder) of M40 grade made with OPC, GGBS, MK and manufactured sand. In this study, OPC is replaced by GGBS and MK in different proportions. By casting requisite number of cubes, cylinders then zMechanical properties are determined such as fCompressivekstrength,sSplitdtensile strength tests and durability properties are determined by conducting Water absorption and Sorptivity tests. Test results are compared between controlled concrete and innovative concrete of M40 grade.It is observed that 30%(15%GGBS,15%MK) replacement is optimum for strength and durability criteria.

scholarly journals The Use of Sheet Glass Powder as Fine Aggregate Replacement in Concrete

2010 ◽  
Vol 4 (1) ◽  
pp. 65-71 ◽  
Author(s):  
M. Mageswari ◽  
Dr. B. Vidivelli
Keyword(s):  
Sheet Glass ◽  
Glass Powder ◽  
Fine Aggregate ◽  
Test Results ◽  
Natural Sand ◽  
Aggregate Concrete ◽  
Fine Aggregates ◽  
Interesting Possibility ◽  
Compact State ◽  
Conservation Of Natural Resources

Sheet glass powder (SGP) used in concrete making leads to greener environment. In shops, near by Chidambaram many sheet glass cuttings go to waste, which are not recycled at present and usually delivered to landfills for disposal. Using SGP in concrete is an interesting possibility for economy on waste disposal sites and conservation of natural resources. This paper examines the possibility of using SGP as a replacement in fine aggregate for a new concrete. Natural sand was partially replaced (10%, 20%, 30%, 40% and 50%) with SGP. Compressive strength, Tensile strength (cubes and cylinders) and Flexural strength up to 180 days of age were compared with those of concrete made with natural fine aggregates. Fineness modulus, specific gravity, moisture content, water absorption, bulk density, %voids, % porosity (loose and compact) state for sand (S) and SDA were also studied. The test results indicate that it is possible to manufacture concrete containing Sheet glass powder (SGP) with characteristics similar to those of natural sand aggregate concrete provided that the percentage of SGP as fine aggregate is limited to 10-20%, respectively.

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