Aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact, As an alternative to crushing value, the aggregate impact value should not exceed 45 by weight for aggregates used for concrete other than for wearing surfaces and 30 by weight for concrete for wearing surfaces, such as runways, roads ...
Effect of Lightweight Aggregates on RCC Beams Arjun Kanth N L1, R. Shanthi Vengadeshwari2 1Student, ... replacing coarse aggregate with LECA 30 by volume amp ... AGGREGATE IMPACT VALUE 26.28 AGGREGATE CRUSHING VALUE 25.07 ABRASION TEST VALUE 24.2
Reading time 1 minuteLos Angeles abrasion test on aggregates is the measure of aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. This test is carried out by AASHTO T 96 or ASTM C 131 Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine. The aggregate
tile aggregate as partial replacement of coarse aggregate in concrete production. 3. Comparison between combined flakiness and elongation index, mechanical properties Aggregate crushing value, Aggregate impact value, Aggregate abrasion value of waste ceramic tile aggregate CTA and natural coarse aggregate NCA. 4.
This is known as aggregate impact value test IS 283-1970. Result Aggregate impact value shall not exceed 45 by weight for aggregate used for concrete other than wearing surface and 30 by weight for concrete for wearing surfaces such as runway, roads, and pavements.
Mar 13, 2019 The aggregate crushing strength value is a useful factor to know the behavior of aggregates when subjected to compressive loads. Impact Value. The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact. The impact value of an aggregate is sometime used as an alternative to its crushing value.
0.2.1 The requirements for aggregates for mass concrete have been included and it is proposed to withdraw IS 515-1959when this standard is printed. 0.3 The limiting values for the permissible deleterious materials in the aggregates, aggregate abrasion value and soundness test for aggregates
Sep 12, 2015 The crushed aggregate is allowed to pass through 2.36 mm IS sieve. And the impact value is measured as percentage of aggregates passing sieve W2 to the total weight of the sample W1. Aggregate impact value W1W2100. Aggregates to be used for wearing course, the impact value shouldnt exceed 30 percent.
Oct 01, 2016 The aggregate crushing strength value is a useful factor to know the behavior of aggregates when subjected to compressive loads. Also read Crushing Value Test of Aggregates. 13. Impact Value. The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact.
Strength of RCC is defined as compressive strength after 28 days, expressed as M15, M20, where M stands for Mix and 15 stands for 15 Nmm 2 nmm 2 must be read as Newtons per millimeter Cubed compressive strength at 28 days. The proportions of materials cement, sand, coarse aggregate for nominal mixdesign mix concrete that are normally used are 136 or 148.
Feb 13, 2021 The test values of compressive strength for 10 and 15 of demolished concrete aggregates are near to the value of standard concrete or conventional concrete Beyond this replacement, the strength acquired reduces gradually and does not cross the target strength and to overcome this problem, a suitable adjustment in mix design is required.
Table 2.3 Physical properties of Coarse Aggregate and Steel Slag S.No Characteristics coarse aggregate Steel slag 1 Type Angular S.Nocrushed 2 Specific Gravity 2.52 2.62 3 Fineness modulus 2.985 2.85 4 Crushing value 19 27.60 5 Impact value 15.03 24.93 6 Water absorption 0.26 2.43 2.4 Water
Aggregate Crushing Value. Aggregate Crushing value depends on the shape of agg also. Angular aggregates have a lower ACV, than Irregular or rounded aggregates.If we cut a core out of the same agg Say in the quarry and test for compressive strength, will give a higher MPa value.
Mar 30, 2018 Settari et al. investigated the potential of RAP for roller compacted concrete pavements RCC 25. Mixes were cast at optimum moisture content OMC wherein it was found that combination of 50 coarse and 50 fine RAP RCC 5050 mix achieved maximum dry density MDD value
RCC shall be used as per SOR item amp AFC drawings 2 Coarse aggregate shall be tested at field laboratory or an approved laboratory gradation of coarse aggregate shall conform to IS383 Crushing value impact value abrasion value flakiness index of coarse aggregate shall be tested at field laboratory or approved laboratory per IS 2386 . Read More
Jul 14, 2020 The aggregate impact value is a measure of resistance to sudden impact or shock, which may differ from its resistance to gradually applied compressive load. Procedure o f Aggregate Impact Test The test sample consists of aggregates sized 10.0 mm 12.5 mm. Aggregates may be dried by heating at 100-110 C for a period of 4 hours and cooled.
Feb 15, 2019 Aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact, As an alternative to crushing value, the aggregate impact value should not exceed 45 by weight for aggregates used for concrete other than for wearing surfaces and 30 by weight for concrete for wearing surfaces, such as runways, roads ...
Nov 16, 2019 The flakiness index of aggregates is the percentages by weight of particles whose least dimension thickness is less than 35 th 0.6 of their mean dimension. The test does not apply to sizes smaller than 6.3 mm. For example, the mean sieve size for an aggregate piece passing through 50 mm and retained on 40 mm sieve is 50402 i.e. 45 mm.
RCC shall be used as per SOR item amp AFC drawings. 2. Coarse aggregate shall be tested at field laboratory or an approved laboratory, gradation of coarse aggregate shall conform to IS383. Crushing value, impact value, abrasion value, flakiness index of coarse aggregate shall be tested at field laboratory or approved laboratory per IS 2386.
Dec 19, 2019 Place the mould in the aggregate impact testing machine and administer 15 numbers of blows of a metal hammer. After that, remove the crushed aggregate and sieve it through a 2.36 mm sieve. The aggregate impact value is measured as of aggregates passing through the 2.36mm sieve W2 to the total weight of the sample W1.
Sieve analysis helps to determine the particle size distribution of the coarse and fine aggregates.This is done by sieving the aggregates as per IS 2386 Part I 1963. This method covers the procedure for the determination of particle size distribution of fine, coarse and all-in-aggregates
Mar 14, 2021 If the placement of concrete is done by a pump or where is required to be worked around congested reinforcing steel, it may be desirable to reduce the estimated coarse aggregate content determined as above, upto 10 percent. After calculating volume of coarse aggregate, subtract it from 1, to find out the volume of fine aggregate. STEP-8.
aggregate have openings ranging from 150 m to 9.5 mm No. 100 sieve to . 3 8. in.. The 13 standard sieves for coarse aggregate have openings ranging from 1.18 mm to 100 mm 0.046 in. to 4 in.. Tolerances for the dimensions of open-ings in sieves are listed in ASTM E 11 AASHTO M 92. Size numbers grading sizes for coarse aggregates
Table-3. Properties of coarse aggregate. S. No. Property Test value 1 Specific Gravity 2.88 2 Water absorption 0.5 3 Sieve Analysis Test results Particle Size Distribution Curve shown in Figure-2 4 Aggregate Impact Value, 21.50 5 Aggregate crushing value, 20.40 6 Combined Flakiness amp Elongation Value, 21.90 Figure-1.
For fine and coarse aggregates tests such as sieve analysis, specific gravity, impact value and crushing value are conducted as per standards. Ref2 3 and results are tabulated in table 2, 3 and 4. For fine and coarse aggregates tests such as sieve analysis, specific gravity, impact value, crushing value and abrasion value Los Angeles ...
energy up to 71.5 by the increase in metallic aggregate replacement volume. In general, incorporation of steel slag coarse aggregate increases the mechanical properties of high-strength concretes may be due to the strength characteristics of steel slag and the stronger bonding between copper slag aggregate
The impact value provides the behavior of the aggregate during an impact. Uses Of Aggregate Aggregate is the most important and most economic factor in building materials to increase its strength, distribute load and increase the volume of the concrete as it is very cheap as compared to cement. Some of the purposes for which the aggregates ...
Impact test The aggregate impact test is carried out to evaluate the resistance to impact of aggregates. Aggregates passing 12.5 mm sieve and retained on 10 mm sieve is filled in a cylindrical steel cup of internal dia 10.2 mm and depth 5 cm which is attached to a metal base of impact
slab. The maximum size aggregate should be a nominal 37,5mm concrete stone, which is often blended with a 13,2mm or 9,5mm concrete stone to improve workability during construction phase. To improve the abrasion resistance only aggregates with a high 10 fine aggregate crushing test value are used. The coarse aggregate content
2. Aggregates. Coarse aggregates of size up to 20mm1inch are considered suitable for the design of the SCC mix. Whereas in the case of structures with highly concentrated reinforcements the aggregate size ranging from 10 to 12mm can be used. Well, graded aggregates of round or cubical shape are preferred for the mix.
Aug 29, 2017 AIMS OF THE PROJECTA 1.To determine various alternatives available for coarse aggregate. 2.To carryout a detail analysis on coconut shells as a coarse aggregate in concrete. 3.To prepare a methodology for the project amp its analysis. 4.To enlist advantages amp short comes of coconut shell as a coarse aggregate material. 5.To ...
Apr 03, 2018 IS 383 2016 Table 8 Sizes of Coarse Aggregates for Mass 7. a the supplier. the aggregate shall Sl Class and Size IS Sieve Percentage be first separated into two fractions. 3 As the fine aggregate grading becomes progressively finer.1 Supplies of aggregate may be
Roller Compacted Concrete Field Evaluation and Mixture Optimization. Kamal H Khayat. Nicolas Ali Libre. Kamal H Khayat. Nicolas Ali Libre. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER.
Mar 23, 2017 In coarse grain, aggregate retained by 10 sieve, age of wear shall not be greater than 5. The max dia of any particle shall not be greater than 23ed of the layer thickness of sub-base. Typical particle size distribution for the sub-base granular when will meet strength requirement are
These kinds of concrete are prepared by using high density crushed rocks as coarse aggregates. One of such materials, Barytes is the most widely used material, that has a specific gravity of 4.5. They are mostly used in atomic power plants and other similar structures because it provides good protection from all kind of radiations.