Coarse aggregates: Maximum 12% when tested with. Sodium Sulphate (Na 2 SO 4) and 18% when tested with . ... Aggregate Crushing Value (ACV). However, if these test values exceed the recommended .
More fineness modulus value indicates that the aggregate is a coarse sand small value of fineness modulus indicated that the aggregate is finer. The Fineness modulus is a factor obtained by adding the cumulative percentages of aggregate retained on each of the sieves ranging from 80 mm to 150 mm microns and dividing this by 100.
Aggregate Crushing Value Test is an important test to be performed on aggregate. The strength of aggregate parent rock is determined by preparing cylindrical shape specimens of size 25 mm diameter and 25 …
1.2 The values given in parentheses are provided for infor-mation purposes only. 1.3 This standard does not purport to address the safety ... C 136 Test Method for Sieve Analysis of Fine and Coarse Aggregates2 C 670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials2
Observations of Los Angeles Test Original weight of aggregate sample = W 1 g Weight of aggregate sample retained = W 2 g Weight passing 1.7mm IS sieve = W 1 - W 2 g Abrasion Value = (W 1 - W 2 ) / W 1 X 100 Results Los Angeles Abrasion Value = Recommended Los Angeles Test Values for Pavements Los Angeles test is commonly …
The size of aggregate used may be related to the mix proportions, type of work etc. the size distribution of aggregates is called grading of aggregates. Following are the classification of aggregates based on size: Aggregates are classified into 2 types according to size. Fine aggregate; Coarse aggregate; Fine Aggregate
Aggregates ppt - Download as a PDF or view online for free. ... 14 It is an excellent coarse aggregate and is obtained by crushing granite, sand stone or grained lime stone and all types of stones. Crushed stones are used for the construction of roads and railway tracks, etc. (a) Crushed stone: ... The aggregate crushing strength value is ...
The Aggregate Crushing Value (ACV) test conducted on coarse aggregates provides a relative measure of their resistance to crushing under a …
A change in the fineness modulus value of coarse aggregate indicates a change in the source material, affecting the workability of concrete. Sieve Analysis of Coarse Aggregate Test: Sieve Analysis of Coarse Aggregate Test Apparatus: IS sieve (size 40mm, 20mm, 12.5mm, 10mrn, 4.75 mm and 2.36mm with lid & pan) Oven; …
The aggregate crushing value is an essential index in the construction of road bases and is defined as the mass percentage of fine particles after a confined compression test of recycled CDW ...
Properties of coarse aggregate Aggregate crushing value % 24.24 % Water absorption % 1.6% 2.68 3.4 Laterite aggregate Laterite is a highly weathered material rich in secondary oxides of Iron, Aluminium or both. It is nearly devoid of base and primary silicates but may contain large amount of quarts, and Kaolinite. ...
AGGREGATE IMPACT VALUE AIM :- To determine the aggregate impact value of coarse aggregates as per IS: 2386 (Part IV) - 1963. APPARATUS :- 1) Impact testing machine conforming to IS: 2386 (Part IV)- 1963 2) IS Sieves of sizes - 12.5mm, 10mm and 2.36mm 3) A cylindrical metal measure of 75mm dia. and 50mm depth 4) A …
Coarse aggregates are further grouped into following groups based on size: ... 3 Aggregate crushing - Steel cylinder [As per clause 2.2.(a) and Fig 1 of ... and Fig 1 of value/Ten Percent Fines IS 2386(Part 1) : 1963] Value - Metal tamping rod (Clause 5.4.1) - Weighing balance - IS sieves -12.5 mm, 10 mm & 2.36 mm ...
Explanation: Crushing test: This test is carried out to assess the strength of coarse aggregate when a compressive load is gradually applied. The test is carried out as follows: 1. The sample is broken into chips passing a 12.5 mm I.S. sieve and retained on a 10 mm I.S. sieve. 2. The material is heated to a temperature of 100°C to 110°C and it is …
The aggregate crushing value provides a relative measure of resistance to crushing under a gradually applied compressive load. To achieve a high quality of pavement, aggregates possessing low aggregate crushing value should be preferred. ... The strength of coarse aggregates is assessed by aggregate crushing test. Prodecure to …
Therefore, fineness modulus of coarse aggregates = sum (cumulative % retained) / 100 = (717/100) = 7.17 Fineness modulus of 7.17 means, the average size of particle of given coarse aggregate sample is in …
The purpose of this study is to determine the effects on concrete mixture properties like compressive strength and workability of using 3/8 mm fraction rolled coarse aggregates in place of 3/8 mm fraction crushed coarse aggregates in different percentages (0%, 8%, 16%, 20%, 24%, and 40%) while keeping the percentage of 8/15 …
Aggregate crushing value test on coarse aggregates gives a relative measure of the resistance of an aggregate crushing under gradually …
The crushing characteristics of coarse aggregates for asphalt concrete were investigated under static and dynamic aggregate crushing value tests (ACVTs). The effect of various compaction loads was also examined by using a Marshall hammer, gyratory compactor and steel roller. Six types of coarse aggregates were tested, …
Similarly, for natural coarse aggregate, the Cu and Cc values were 1.07 and 1.01, respectively, and for brick aggregate, the values were 1.76 and 1.17, respectively. The graphical representation of the sieve analysis of CBA and NCA is shown in below Fig. 9 a and b respectively whereas Fig. 10 shows the sieve analysis of fine …
The actual crushing value of an aggregate is a relative measure that shows the resistance to crushing under a slowly applied compressive load. ... To determine the strength of coarse aggregate and suitability of the aggregate for construction. How to perform Aggregate crushing value test? Apparatus required. IS sieves of sizes 12.5 mm, 10.5 …
For determination of the aggregates 10% fines value of coarse aggregate, which passes 12.5 mm. IS sieve and retained on 10 mm IS sieve Reference Standards. IS : 2386 (Part IV)-1963 Methods of test for aggregate for concrete Part IV Mechanical Properties. Equipment & Apparatus. Steel cylinder; Sieves (12.5mm,10mm) Cylindrical …
In current Chinese technical specification, the crushing value of the coarse aggregate for surface layer of asphalt pavement is no greater than 26% . So, the crushing value standard of basalt coarse aggregate used in PA mixture should be increased to not more than 26%/1.48 = 17.6%.
Based on the results of the one-way ANOVA of the crushing values at 20°C, 140°C, and 160°C, as shown in Table 8, the P value was larger than 0.05, which proved that the temperature had no significant effect on the crushing value when the temperature of the hard sandstone aggregate was 160°C and below. However, when …
Exploring Coarse Aggregates: The Backbone of Construction and Beyond In the vast arena of construction and infrastructure development, one term takes center stage: "coarse aggregates." ... Tests such as the gradation, crushing value, impact value, and specific gravity assessments ensure quality. Are there innovative alternatives to …
However, they reported very low workability in concrete containing coarse ceramic aggregate with a slump value of 40 mm. Tavakoli et al. [24] also observed a slight decrease in slump values by incorporating ceramic tile aggregate as the substitute of coarse aggregate with 0–40% of substitution and also for sand with 0– of …
Crushing strength Test Ascertained by aggregate crushing value It gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load For this test, 12.5 mm passed and 10 mm retained aggregates are used Surface dry condition aggregates are filled into the standard cylinder with three layer of …
AIM: Determination of Aggregate Crushing Value Crushing Strength of Coarse Aggregate. Aggregate Crushing value test IS Code is 2386-4 (1963): Methods of Test for Aggregates for Concrete Aggregate Crushing Value Apparatus 1. A 15 cm dia. 2. Steel cylinder with the plunger and base plate. …
The coarse aggregate specific gravity test (Figure 1) is used to calculate the specific gravity of a coarse aggregate sample by determining the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. ... High values can indicate non-durable aggregate. Absorption can indicate the amount of asphalt binder the ...
Aggregate Crushing Value (ACV) can be determined by using a simple formula: This test is repeated once or twice and the average crushing value of the aggregate is determined. The average crushing value in the …
Sampling of Aggregates. Select coarse aggregate that passes through a 12.5mm IS sieve and is retained on a 10mm IS sieve. Heat the aggregate at 100 to 110°C for 4 hours, cool it to room temperature, and ensure that the material depth in the cylinder, after tamping as described below, is 10 cm. Determine the appropriate quantity by filling …
The aggregate crushing value of the coarse aggregates used for cement concrete pavement at surface should not exceed 30% and aggregates used for concrete other …