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by: Porter Kirlin


Porter Kirlin
GPA 3.86

C. Friedland

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C. Friedland
Class Notes
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This 5 page Class Notes was uploaded by Porter Kirlin on Tuesday October 13, 2015. The Class Notes belongs to CM 3400 at Louisiana State University taught by C. Friedland in Fall. Since its upload, it has received 36 views. For similar materials see /class/222670/cm-3400-louisiana-state-university in Construction Management at Louisiana State University.

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Date Created: 10/13/15
ASTM D5581 39 to Plastic Flow of Bit 39 Mixtures Using Marshall Apparatus AKA Flow Resistance ofAsphaIt using Marshall Compactor PURPOSE Measures the resistance to plastic ow of an asphaltcement mixture under a lateral load applied by a Marshall Compactor SIGampUSE To determine the maximum load and ow of the mixture PROCEDURE Compact sample with hammer heat apply load measure change CONCLUSION Compare results to table acceptreject sample ASTM D2726 Specific Gravity and Density of NonAbsorptive Compacted Bituminous Mixtures Method uses specific gravity density and absorption of specimens to determine degree of compaction in road and paving materials Test done by measuring mass when dry wet and in SSD condition and then using the specific gravity formula to find the density and absorption Absorption must be below 2 for acceptable results ASTM D2872 This ASTM uses a small oven to simulate the aging asphalt binder undergoes in hotmix production so that further testing of the binder ow characteristics may be done The test also has a change in mass calculation that determines the amount of vaporization that occurs during hot mixing and placement ASTM 4402 Viscosity Determination of Asphalt at Elevated Temperatures USE This test determines the viscosity of the asphalt binder at different temperatures This test uses a rotational viscometer to determine the viscosity of the binder by measuring the torque needed to keep the spindle rotating at a certain speed It also requires a Thermosel temperature controlled chamber to test the binder at specific temps The reason a manufacture might need to know the viscosity is so they can control the pumpablity mixability and workability of the asphalt binder PROCEDURE 1 Heat up thermosel spindle and sample chamber at specified temperature at manufacture request 2 Take out sample chamber add 8 to 10 mL of binder to it and put back into thermosel to heat up binder 3 Attach spindle to the rotational viscometer 4 Allow for everything to come to equilibrium temperature then start viscometer 5 Record readings every 60 seconds for 3 minutes and average the scores Calc The rotational viscometer will give the viscosity in CF centipoise so to get the recordings in Passecs multiply cP and 001 ASTM D625 Accelerated Aging of Asphalt Binders using a Pressurized Aging Vessel This test is done by using pressurized air and elevated temperatures to determine the oxidation ofAsphalt Binders Simulates the changes Asphalt binders go through during aging It DOES NOT accurately simulate rates at which the binder s age This test is used to determine the Physical and Chemical Properties of the Asphalt Binders You need a pressure vessel Stainless Steel Pans Balance Vacuum oven Vacuum System as well as an oven First you want to fill the balance with about 50g ofasphalt binders Place pressure vessel in oven until it gets to desired temperature Pressurize the vessel to about 21 MPa that is about 300 psi Maintain the pressure and temp for about 20 hours After that is done then you place samples in the vacuum oven that is preheated to 170 degrees C which takes out gases and still heats up sample ASTM C 803 Standard test method for penetration resistance of hardened concrete Determines the resistance ofhardened concrete to penetration by steel probe Assesses uniformity and in place strength and locates areas ofpoor quality or deteriorated concrete Procedure Use positioning device to locate area to be tested and use the driver unit to fire a steel probe into the concrete Measure the average exposed length after 3 probes and compare this to your tables to find in place strength Use the moh39s number the resistance of aggregate to scratching and your exposed lengths to determine concrete strength ASTM C39 Compressive Strength of Cylindrical Concrete Specimens Purpose Determines compressive strength and quality of concrete It also determines the effectiveness of the admixtures in the concrete Apparatus hydraulic compression test machine Must be power operated Top and bottom bearing plate must be at least 3 larger than specimen Procedure 1 Measure cylinder 2 Place and center specimen 3 Apply a constant load of at least 35 PS1 4 Apply load until specimen fails 5 Record maximum load carried the type of fracture and any observations D4867 Standard Test Method for effect of moisture on asphalt paving mixtures Why do we do this test Asphalt roadways are susceptible to damage from moisture penetration and the freezethaw cycle This is why we get cracks and potholes on our roads Purpose of the test determine how much antistripping additive can be added to mixture to help prevent damage caused by moisture Testing 1 Create sample in the lab with specs and with the same conditions as the worksite 6 8 air voids 2 Take a sample and spit itinto 2 equal parts one part will stay dry the other part will be saturated 3 Take each part and split it into another 3 equal parts total of 6 parts 4 To saturate the wet sample put specimen into water and then put into a vacuum for 24 hours 5 After 24 hours test for the degree of saturation a If it is less than 55 that you need to put the specimen back in the vacuum and crank up the vacuum b If it is between 5580 you are good to go c Ifit is over 80 the specimen is damaged and you need to start again 6 Before the test you are going to soak both the dry and the saturated specimens for 1 hour in 1400F 7 You will then rabidly cool the specimen to room temperature 77oF 8 Apply a load of 2 minute until desired load is reached or the specimen fails 9 Even if the specimen does not fail break open the specimen to observe the sample 10 You will report the moisture damage by the ratio of the tensile strength of the wet subset to the dry subset 11 Repeat test with different amounts of antistripping additive to see if there is a difference with amounts added and determine the best ratio of additive to mixture ASTM D198 Flexure Test of Wood Purpose Determine exure properties ofwood such as modulus of rupture modulus of elasticity and failure conditions Intended for wood members with rectangular cross sections Significance and Use Grading rules and specifications Strength properties of different species In uence ofimperfections in wood Sample WoodPlastic Composite Composite Construction of Wood Laminated wood Solid wood Procedure 1 Record weight species dimensions any imperfections and grade 2 Locate beam symmetrically on supports 3 Conduct load test at a constant rate to achieve maX load in about 10 min 4 Obtain load de ection data from either one point load apparatus or two point load 5 Record first failure maX load and any moments of sudden change Report Complete identification of test specimen Loading conditions and equipment used Rate ofload application Description of any failure ASTM D2 170 Standard Test Method for Kinematic Viscosity of Asphalt Purpose Determine kinematic viscosity of asphalt in order to figure out the viscosity of the asphalt Knowing viscosity determines the ow ability and resistance to compaction of the asphalt It can also determine if the bitumen is a strong enough binder Procedure 1 Choose a sample of bitumen liquid asphalt 2 Choose a capillary viscometer 3 Maintain temperature ofviscometer in a bath 4 Pour sample of bitumen into viscometer 5 Use suction to pull the bitumen above the quotstartquot line 6 Using a timer record the time it takes for the bitumen to fall from the start line to the stop line 7 If this time is longer than 60 seconds you must choose a viscometer with a smaller capillary 8 Equation Kinematic Viscosity C t 9 C constant given with viscometer t time measured from start line to stop line 10 KV Density of Asphalt viscosity ofasphalt 11 High viscosity resistance to compaction ASTM C 140 Sampling and Testing Concrete Masonry Units and Related Units What is determined A Compressive Strength B Absorption amp Density Why do we need this info A To meet project specifications given by architectsengineers B Safety and proper usage in masonry structures Test 1 for Compressive Strength A Three units needed and are kept at constant temperature and humidity before testing B Test can be performed on full or partial size unit depending on machine capacity C Measure the gross area of the specimen D Cap the bearing surfaces on the unit E Place the specimen in the testing machine F Over the course of 1 to 2 minutes apply the maximum expected load G Record the maximum load in Pounds lbs Test for Absorption A Use 3 representative full size units B Weigh amp record the weight of each specimen Wr C Place specimen in water and weigh each while submerged Wi D Remove drain the specimens then weigh W s E Dry specimen in a ventilated oven over 24 hours and record weightWd Results Compressive strengthPSI PSI LbsAreaSI Moisture Content Absorption WrWdWsWd x 100


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