Due to the movement of traffic, the road stones used in the surfacing course are subjected to wearing. C702 practice for reducing samples of aggregate to testing size. The microdeval test, in conjunction with the magnesium sulfate soundness test, was recommended in lieu of the l. Objective abrasion test is carried out to test the hardness property of aggregates. An accelerated test method was developed and used to evaluate abrasion resistance of high strength concrete. Abrasion testing is a necessity for manufacturers who are interested in producing highquality products with a long lifespan. Analysis of coarse aggregate performance based on the modified micro deval abrasion test article pdf available in international journal of pavement research and technology 112 october 2017. Abrasion test in the last installment of our abrasion testing series, we wrote about the importance and use of the microdeval test.
For this test, the sample taken should be clean and dried. Testing abrasion resistance of highstrength concrete. This new index, k s is compared with wet attrition and aggregate abrasion values for a suite of 11 rocks with wide ranging strengths. Method of test for abrasion of lightweight course aggregate dotd designation. Pdf standard test method for resistance to degradation. In recent years, the microdeval test has gained acceptance and popularity as an economical and accurate procedure for aggregate abrasion testing. Pdf analysis of coarse aggregate performance based on. Aashto t 96 resistance to degradation of smallsize coarse aggregate by abrasion and impact in. The basis for this method was developed in france during the 1960s and provides a measure of toughness, abrasion resistance and durability of mineral aggregates as they are ground with steel balls. Methods of test for aggregates for concrete, part 4. The mohs hardness scale is frequently used for determination of mineral hardness figure 3. Aggregate crushing value test procedure and result.
Unconfined freezethaw test for coarse aggregate mto ls614, 2. The percentage is a measure of the degradation or loss of material as a result of impact and abrasive actions. This method used the grinding wheels with smaller size washers, and a. Abrasion dorry abrasion test it is determined according to the procedure laid. Measure of resistance of coarse aggregate to degradation breakdown by.
Astm c1 c1m 20 standard test method for resistance. This section presents the standardization of abrasion test or test method for abrasion. There are 3 tests commonly used to test aggregates for its abrasion resistance. Abrasion and impact test and other soundness tests. Toughness can be defined as the ability of an aggregate to resist the impacting and. This test is carried out by aashto t 96 or astm c 1. Development of a mortar abrasion test for fine aggregates. Pdf testing abrasion resistance of highstrength concrete. Aggregate abrasion value this test helps to determine the abrasion value of coarse aggregates as per is.
Illinois test procedure 327 resistance of coarse aggregate to degradation by abrasion in the microdeval apparatus 77 hard copies uncontrolled. Assessing the moisture susceptibility of aggregates. Characteristic significance test designation requirement or item reported. A mill abrasion test for wear resistance of armour stone. Aggregate abrasion characteristics are important because the constituent. This standard is issued under the fixed designation c 1. Abrasion test is the measure of aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. Microdeval test method aggregate abrasion testing pt. California test 201 soil and aggregate sample preparation.
If you continue browsing the site, you agree to the use of cookies on this website. Astm c 1 aashto t 96 maximum percentage of and degradation wear resistance of floors and astm c 535 weight loss. Toughness abrasion resistance aggregates must be tough and abrasion resistant to prevent crushing, degradation, and disintegration when stockpiled, fed through an asphalt plant, placed with a paver, compacted. C670 practice for preparing precision and bias statements for test methods for construction materials.
Abrasion requirements do not apply to blast furnace slag. This loss is an indication of an aggregate s resistance to abrasion, weathering, and degradation using the microdeval testing equipment with abrasive stainless steel balls and water. Aggregate crushing values is a relative resistance of aggregates to crushing under gradually applied compressive load in situations, when aggregate value 30 or higher the result may be a mistake and in such cases, the ten percent fines value should be determined and used instead. Deval attrition test natmm28 for aggregate testing for the determination of resistance of aggregates to wear by abrasion. Hardness property of aggregate is determined by conducting abrasion test. Abrasion test is carried out to test the hardness property of aggregates.
It consists of two hollow cylinders closed at one end and provided with fitting covers at the either end. One prop erty studied is the resistance of aggregates to abrasion and impact. Astm c944 test, were quite low less than 1 mm for the strength levels tested in this work. With a multitude to different testing methods available, each with their own nuances, it can be difficult to decide which test to use. The aggregate used in surface course of the highway pavements are subjected to wearing due to movement of traffic. Soft aggregate particles are composed of minerals with a low degree of hardness. Azom spoke to alan jaenecke, from taber industries, about the different types of. Many agencies have specified the desirable limits of the test, for different methods of pavement construction. This paper presents the development and results of a testing program to determine whether the aggregate abrasion value aav test british standard en10978 2009 could be adapted to determine abrasion. The dressing wheel produces a depth of wear more than double that obtained with the revolving. Technico industrial corporation is manufacturer,supplier and exporter of dorry abrasion testing machine from are offering best quality of. California test 202 sieve analysis of fine and coarse aggregates. Manual of aggregate quality test procedures april 16, 2019. The evaluation of the conventional and the alternative tests.
Based upon this large research study, the microdeval test was recommended as an aggregate test related to raveling, popouts, and potholing. Understanding the different types of abrasion testing. Deval attrition test for testing lab for aggregate testing. Standard test methods for determination of abrasion.