siliceous sand and stone dust were used as fine aggregate, with the coarse aggregate being basaltic, whose physical characteristics are presented in Table 1 (Figure 1). It can be observed that the stone dust presents a high fineness modulus, greater than the limit recommended by Brazilian standard NBR 7211. 10 Nevertheless; such material can be
stone dust as fine aggregate in concrete it is found that there is increase in compressive, flexural and tensile strength of concrete (Nagpal et al., 2013). It has been observed that 40% replacement of fine aggregate with stone dust is adaptable (Franklin et al., 2014). It was observed that the replacement of
percentage of coconut shell (7.5%) was kept in concrete and the fine aggregate was replaced with stone dust with the percentage of 10%, 20%,30% and 40%. The value of slump in the above cases decreases as we increase the percentage of stone dust. Table 4.1 variation of slump with coconut shell % of CS 0% 7.5% 15% 20% 25%
Robosand or M-Sand was used as replacement of fine aggregate. Robosand is a result of crushed stone, here the stones are pulverized into smaller granular size of river sand granules and washed to expel the fine rock dust to enhance the quality as per IS: 2386-1975The properties of robosand are shown in Table-3. The Fineness property of
For normal concrete ( not self compacting concrete, not super plasticiser added concrete), there is a direct relationship with concrete strength and slump. Slump -the indicator of workability, till a range, beyond which it is the indicator of poor...
· The Narmada River sand is used as NS. (ii) Crushed Stone dust is a fine material formed during the process of conversion of rock into aggregate and has particle size ranging from 4 mm to dust size (> 0.075mm). It was procured from stone crusher plant producing 20 mm downgraded aggregate, M/s Maa Pitambara Stone situated at Neelbad, Bhopal (India).
Stone dust produced from stone crushing zones appears as a problem for effective disposal. Sand is a widely used fine aggregate used in construction work. In this research, the main concern is to find a substitute of sand. Substitution of normal sand by stone dust will serve both solid waste minimization and waste recovery.
3.2 Fine Aggregate: Fine aggregate used in this study is locally availa ble and confirmed to grading zone III as per IS 383-1970.the aggregates whose size is less than 4.75mm. Sand is generally considered to have a lower size l imit of about 0.07mm. The specific gravity of fine aggregate was found out using pycnometer and sieve
of quarry rock dust concrete was comparably 10-12 % more than that of similar mix of conventional concrete. Hameed and Sekar, 2009 studied effect of crushed stone dust as fine sand and found the flexural strength increases than the concrete with natural sand but the values decreases as percentage of crusher dust increases.
Sand is a common fine aggregate used in construction work as a fine aggregate. In this study, the main concern ... ratio) and slump constant with the use of admixture (Ahmed, 1996). Fine aggregate is basically sand ... value of stone powdered mortar compressive strength.
· The Sono-Vario sensor claims to measure aggregates up to 1-1/4 in. to within 0.2 percent moisture level, which is impossible with other sensors. For "regular" microwave sensors, the maximum aggregate size for any real accuracy is 3/8 in. and even 1/4 …
Stone dust can be used as an apposite substitute for fine aggregate in the case of non-availability of natural river sand at reasonable cost. Stone dust (% ) Compressive strength of cube 7 days 28 days 0 24.41 35.11 10 25.1 38.42 20 27.24 38.03 30 28.05 40.32 40 27.14 41.71 50 30.56 42.33 Percentage stone dust SUGGESTION 1.Crusher Stone Dust ...
replacement of the fine aggregate with stone dust % of fine aggregate replaced with stone dust Compressive Strength (N/mm2) 3 days 7 days 28days 0% 17 19.1 61 10% 18 20 62 20% 21 23 64 30%` 25 28 68 40% 28 34 72 50% 23.5 30 60 Figure 1: Variation of Strength due to % of fine aggregate replacement with stone dust
Fine aggregates generally consist of natural sand or crushed stone with most particles passing through a 3/8-inch sieve. Coarse aggregates are any particles greater than 0.19 inch, but generally range between 3/8 and 1.5 inches in diameter.
Physical Properties Stone dust Fine aggregate Bulk density (kg/cm3 ) 18.18 15.3 Water Absorption% 6.2 9.4 Specific Gravity 2.8 2.73 Fineness Modulus 2.49 2.10 Bulking of sand (%) 4.91 5.55 Table 1 : Physical Properties of Stone dust and Fine aggregate B. Mix Design: The mix proportion chosen for this study is M20 grade with
· The machine has a screen that traps the larger material (that is, the crushed stone). The smaller material or "screenings" falls through the screen. Depending on the size of the holes in the screen used, it can be so fine in texture that it is basically a powder. This is what you are buying as "stone dust." But it may go by other names, such as:
investigation, stone dust, a waste material obtained from crusher plants is used as partial replacement of cement and fine aggregate. M25 grade of concrete was taken for this investigation with a final mix proportion of 1:1.79:2.92 at w/c ratio of 0.50. The replacement levels of cement and fine aggregate with stone dust were 5%, 10%, 15%.
industries and stone dust is a waste product from crusher plants. Waste disposal is an important issue in the present ... Fine Aggregate: Fine aggregate is a naturally occurring ... TABLE – II. SLUMP VALUE AND COMPACTION FACTOR Concrete Mix W/c ratio Slump Value Compaction Factor Conventional concrete 0.4 3 0.89
Percentage Content of Stone dust Waste Glass Powder vs Slump Value 1) Discussion: From the above graph, it was found that slump value Decreases from sample CC to R5 without glass powder, for normal concrete value of slump is 85 mm when add stone dust it value continuous decreases, when we add stone dust and waste
2.3.5 In the case of mixtures of fine and coarse aggregates, the material shall be separated into two sizes on 4-75-mmIS Sieve, and the samples offine and coarse aggregates shall be prepared as described under 2.3.3 and 2.3.4-%.4 Procedure- The sample shall be spread in a thin layer on the bottom of the container and examined for clay lumps ...
· 2.3.2.1. Fine Aggregate This is natural sand from a good source free of impurities and contaminations that is capable of achieving the cohesiveness of the mix and desired strength: Kong and Evans (1996). Fine Aggregate is derived from natural sand or crushed stone sand or crushed gravel with particle capable of passing a 5mm sieve by Kong and ...
stone dust slump flow value, v-funnel value and T 50 value is decreases. Due to the irregular shape and flakiness of stone dust. 2. The optimum fine aggregate replacement with stone dust quantity is 40%. 3. Increase in the fly ash content in the total powder in the optimized stone dust mix the slump flow v-funnel values are increases 4.
The workability of fresh concrete was measured by the slump test. It was observed that the slump value decreased with increment of stone dust in concrete. The graphical representation of slump values for different percentage of stone dust with constant dose of super plasticizer (i.e., at 0.8% by weight of cement) in concrete as shown in figure 3.
Table - 3.1. Physical properties of quarry rock dust and natural sand Fine aggregate (Natural river sand): River sand having of 1813.33 kg/m3 odulus of 2.015 was used. The specific gravity was found to be 2.5. Table - 3.2. Sieve analysis for sand Fine aggregate (Quarry stone dust): Quarry Stone dust used in the laboratory investigations was
tension and flexure for 7 and 28 days. The test result showed th at concrete with sharp sand as fine aggregate develop a strength of 28mpa on the 28th day while quarry concrete at the same age developed a strength of 32.8mpa indicating a 17% more compressive strength of the stone dust over the sharp and concrete (Prakash and Kumar 2004).
To determine the reference slump value for Kistner concrete mix design and to calibrate it against an equivalent measure using a flow table. Materials Natural coarse aggregate and siliceous fine aggregate with maximum size of 3/8 in., supplied by Kistner Concrete Products, Inc. Soda-lime glass aggregate passing #4 standard sieve.
made using stone dust as fine aggregate replacement having greater value in comparison of conventional concrete whereas the workability of concrete was decreased rapidly with the increment of stone dust in concrete. It may be due to the more water absorption capacity of stone dust in comparison of natural aggregate or lack of surface moisture ...
Source: Table 1 Limits for Deleterious Substances in Fine Aggregate for Concrete, ASTM C 33. * In the case of manufactured sand, if the material finer than the 75-micron (No. 200) sieve consists of the dust or fracture, essentially free of clay or shale, these limits are …
The aggregates passing 4.75 mm tyler sieve and retained on .075 mm sieve are classified as Fine Aggregate. Types of Fine Aggregate. Usually, sand, crushed stone, and crushed bricks are used as fine aggregate in concrete or pavement construction. Sand. Sand is an important engineering material. In concrete works, sand is used as a fine aggregate.
Additionally, each type of coarse aggregate was partially replaced by a fine aggregate of the same type in an amount equal to 12.5% in volume. Mortars were manufactured in order to reach the same workability, with a slump value between 120 and 130 mm, which corresponds to a stiff consistency (<140 mm, according to UNI EN 1015–3:2007).
