WEBVTT 00:05.199 --> 00:07.532 Rapid airfield damage repair operations , 00:07.532 --> 00:09.643 rely on the use of heavy equipment to 00:09.643 --> 00:11.670 remove damaged pavement , prepare 00:11.680 --> 00:14.220 craters for repair and produce repair 00:14.229 --> 00:17.540 materials on site . Crater repair teams 00:17.549 --> 00:19.605 require large quantities of flowable 00:19.605 --> 00:22.280 fill for backfill operations and rapid 00:22.290 --> 00:24.610 set concrete . For the capping process . 00:25.100 --> 00:27.211 The primary equipment used to produce 00:27.211 --> 00:29.433 these materials is a volumetric mixer . 00:30.090 --> 00:32.380 When mobilized , this machine produces 00:32.389 --> 00:35.409 a flow fill or rapid set concrete mix 00:35.419 --> 00:37.340 used to repair air fill damage . 00:39.520 --> 00:41.687 In this lesson , you will learn how to 00:41.687 --> 00:43.742 properly use the volumetric mixer to 00:43.742 --> 00:45.742 produce flowable fill and rapid set 00:45.742 --> 00:47.700 concrete . You will also learn 00:47.709 --> 00:49.765 components of the volumetric mixer , 00:49.765 --> 00:51.470 available concrete mixtures , 00:51.479 --> 00:54.130 volumetric mixer operations and 00:54.139 --> 00:55.917 cleaning and maintenance of the 00:55.917 --> 00:58.459 volumetric mixer . Let's get started . 00:59.740 --> 01:01.950 Volumetric mixers are used to produce 01:01.959 --> 01:04.470 concrete materials at a job site and 01:04.480 --> 01:06.758 are assigned to the crater repair team . 01:07.250 --> 01:09.028 The operator may be part of the 01:09.028 --> 01:11.459 backfield or capping crew depending on 01:11.470 --> 01:14.879 the capping method plant mixed concrete 01:14.889 --> 01:17.239 is produced using a job mix formula 01:17.269 --> 01:19.559 based on the weight and proportions of 01:19.569 --> 01:22.089 the material volume . Metric mixers 01:22.099 --> 01:24.155 produce concrete based on the volume 01:24.155 --> 01:26.099 and proportions of the materials , 01:27.110 --> 01:29.959 volumetric mixer requirements . This 01:29.970 --> 01:31.989 volumetric mixer is a trailer unit 01:32.209 --> 01:34.940 towed by a prime mover . An additional 01:34.949 --> 01:37.209 requirement is a water truck or a dump 01:37.220 --> 01:39.389 truck with a water tank in the bed . 01:40.339 --> 01:42.540 The crew includes a tele handler to 01:42.550 --> 01:44.910 resupply the mixer's bin with super 01:44.919 --> 01:47.269 sacks of materials and a water truck 01:47.279 --> 01:49.400 operator to ensure that mixer water 01:49.410 --> 01:51.743 tanks have a sufficient amount of water . 01:52.330 --> 01:54.680 This collaboration of personnel keeps 01:54.690 --> 01:56.912 the unit mobile and easily resupplied . 01:58.639 --> 02:01.330 Note , the US Air Force currently has 02:01.339 --> 02:03.629 the pro all and C M tech volumetric 02:03.639 --> 02:06.250 mixers in its inventory . Both machines 02:06.260 --> 02:08.371 are designed to work exclusively with 02:08.371 --> 02:10.316 the radar materials , unlike other 02:10.316 --> 02:12.316 volumetric mixers filled in the air 02:12.316 --> 02:14.371 force . Both mixers are functionally 02:14.371 --> 02:16.593 identical but operationally different . 02:18.160 --> 02:19.993 The following are the components 02:19.993 --> 02:22.216 thought on the left side of the pro all 02:22.216 --> 02:24.759 volumetric mixer . Let's take a moment 02:24.770 --> 02:27.990 to review them . Hydraulic oil reserve 02:28.869 --> 02:32.360 engine cover tart , a protective top 02:33.039 --> 02:36.089 mix water tank pressure washer , 02:37.050 --> 02:40.460 engine control panel extension shoot , 02:41.419 --> 02:45.369 gate control , electrical control panel , 02:46.139 --> 02:50.009 hydraulic control panel . We will now 02:50.020 --> 02:52.131 look at components found on the right 02:52.131 --> 02:54.187 side of the pro all volumetric mixer 02:55.089 --> 02:57.910 transition shoot emergency , clean out 02:57.919 --> 03:01.649 water bag breakers bin covers 03:02.710 --> 03:05.270 mixer auger water pump , 03:06.279 --> 03:10.210 mixing bowl speed select gearbox 03:11.270 --> 03:14.869 right side extension shoot auxiliary A . 03:17.289 --> 03:19.456 Now let's take a look at components of 03:19.456 --> 03:21.233 the tow bar side of the pro all 03:21.233 --> 03:24.429 volumetric mixer toolbox 03:25.130 --> 03:27.660 prime mover source air and electrical 03:27.669 --> 03:31.550 hookup to chains trailer jack 03:32.300 --> 03:36.009 Manuel crank 1 20 volts ac 03:36.020 --> 03:39.630 receptacle height , adjustable blue 03:40.149 --> 03:42.929 eye now that you've seen where the 03:42.940 --> 03:44.662 controls and indicators on the 03:44.662 --> 03:46.789 volumetric mixer are located . Let's 03:46.800 --> 03:48.967 look at how concrete is produced using 03:48.967 --> 03:51.720 this equipment , whether flow will fill 03:51.729 --> 03:53.789 or wrap concrete is being produced . 03:54.149 --> 03:56.179 Water is an essential element in 03:56.190 --> 03:58.990 batching concrete mixtures . Therefore , 03:59.169 --> 04:01.002 an adequate water supply must be 04:01.002 --> 04:03.169 maintained in order for the mixture to 04:03.169 --> 04:05.490 function properly . Water truck 04:05.500 --> 04:07.880 operators maintain water supplies and 04:07.889 --> 04:09.833 volumetric mixture . Water tanks , 04:10.270 --> 04:12.970 water supplies can be kept in a 04:12.979 --> 04:15.300 designated water truck , a water 04:15.309 --> 04:17.269 trailer or a water skid . 04:21.480 --> 04:23.399 Prepare materials for operations 04:23.410 --> 04:26.619 include super sacks . A global fill or 04:26.630 --> 04:29.260 rapid set concrete . They are delivered 04:29.269 --> 04:31.325 to the repair sites by the warehouse 04:31.325 --> 04:33.920 operations hall team and tele handler 04:33.929 --> 04:37.320 operators flowable fill is a medium 04:37.329 --> 04:39.390 strength material used underneath 04:39.399 --> 04:42.640 capping operations . Repet concrete 04:42.649 --> 04:45.429 functions as its name applies , it is 04:45.440 --> 04:47.820 used to create a rapidly setting high 04:47.829 --> 04:50.279 strength surface . It has design 04:50.290 --> 04:53.739 strength of 9000 p . Si rapid set 04:53.750 --> 04:56.730 concrete has an initial set time of 45 04:56.739 --> 04:59.630 minutes in fair weather . Initial set 04:59.640 --> 05:02.709 means that it can handle radar vehicles 05:02.720 --> 05:05.570 and equipment traffic set time for 05:05.579 --> 05:08.000 aircraft traffic of all airframes is 05:08.010 --> 05:11.480 two hours in the radar process . Citric 05:11.489 --> 05:14.329 acid is used as a retarder to slow the 05:14.339 --> 05:16.489 rate of hydration and counteract the 05:16.500 --> 05:18.459 effects of hot weather during the 05:18.470 --> 05:21.160 setting and occurring process . This 05:21.170 --> 05:23.600 material is added during the mixing 05:23.609 --> 05:26.940 process if needed in the radar process . 05:26.950 --> 05:29.160 Aluminum sulfate is used as an 05:29.170 --> 05:30.948 accelerant to speed the rate of 05:30.948 --> 05:33.170 hydration and counteract the effects of 05:33.170 --> 05:35.170 cold weather during the setting and 05:35.170 --> 05:37.910 curing process . This material is added 05:37.920 --> 05:40.031 during the mixing process if needed . 05:40.329 --> 05:42.496 Now , let's look at the preoperational 05:42.496 --> 05:44.718 checks that need to be performed before 05:44.718 --> 05:46.607 the mixer can be prepositioned or 05:46.607 --> 05:50.109 operated trailer connections , ensure 05:50.119 --> 05:52.459 the trailer connection and airlines are 05:52.470 --> 05:55.549 secured to the prime mover check fluid 05:55.559 --> 05:58.809 levels . Ensured diesel fuel engine 05:58.820 --> 06:01.279 fluids and hydraulic levels are at the 06:01.290 --> 06:04.760 proper levels . Lubrication points 06:05.390 --> 06:07.670 ensure all grease fittings are properly 06:07.679 --> 06:10.630 lubricated catwalks , 06:11.279 --> 06:13.910 ensure catwalks are down and secured on 06:13.920 --> 06:17.160 both sides . Proper preparation . 06:17.890 --> 06:20.570 Retract the tarp covering the unit and 06:20.579 --> 06:23.059 then remove the hopper cover . Ensure 06:23.070 --> 06:25.126 back breakers are properly installed 06:25.126 --> 06:27.470 and secured visually . Check the 06:27.480 --> 06:29.700 Grizzlies inside the hopper are clear 06:29.709 --> 06:33.200 of obstructions , tire and alarm check , 06:34.279 --> 06:36.940 check tires for proper pressure inflate 06:36.950 --> 06:39.940 if needed removal , left side 06:40.989 --> 06:43.156 the cover behind the hydraulic control 06:43.156 --> 06:45.267 panel on the left side is removed for 06:45.267 --> 06:47.100 inspection of the conveyor chain 06:47.100 --> 06:49.211 sprockets . Pro all doesn't specify a 06:49.211 --> 06:51.220 requirement for this action but the 06:51.230 --> 06:53.720 silver site at 10 encountered a failure 06:53.730 --> 06:56.049 at 65 hours . And because of this 06:56.059 --> 06:57.950 students are instructed on how to 06:57.959 --> 06:59.792 remove the cover and inspect for 06:59.792 --> 07:02.059 material build up . The cover is held 07:02.070 --> 07:04.040 in place by three bolts and can be 07:04.049 --> 07:06.170 removed with a ratchet and socket 07:06.179 --> 07:09.950 combination panel removal , rear 07:11.019 --> 07:13.130 the vertical panel on the rear of the 07:13.130 --> 07:15.297 material bend is removed to access the 07:15.297 --> 07:17.297 gears that raise and lower the gate 07:17.350 --> 07:19.350 during normal operations . The gate 07:19.350 --> 07:21.517 control can become difficult to rotate 07:21.517 --> 07:24.690 due to material accumulation doesn't 07:24.700 --> 07:26.811 specify a requirement for this action 07:26.811 --> 07:28.978 but it is helpful to remove this panel 07:28.978 --> 07:31.200 weekly . The horizontal panel covering 07:31.209 --> 07:33.320 the conveyor belt is removed to clear 07:33.320 --> 07:35.559 the area of material that is left after 07:35.570 --> 07:38.049 operation . This is done to preserve 07:38.059 --> 07:40.829 the rubber ware plates . Dry material 07:40.839 --> 07:42.950 remaining in the area could harden as 07:42.950 --> 07:45.006 environmental moisture is absorbed . 07:46.209 --> 07:49.130 Panel removal right side , the speed 07:49.140 --> 07:51.362 selector gearbox is removed to show the 07:51.362 --> 07:53.529 location of five hitting grease points 07:53.529 --> 07:55.820 that require servicing every 50 hours 07:55.829 --> 07:57.829 per the pro all lubrication chart . 08:00.690 --> 08:02.746 Operators must perform the following 08:02.746 --> 08:05.019 pre startup checks before the mixer can 08:05.029 --> 08:08.470 be prepositioned or operated , pressure 08:08.480 --> 08:10.980 washer , ensure the pressure washer 08:10.989 --> 08:13.149 rail is secure and the wa is 08:13.160 --> 08:16.250 serviceable , start and check the mixer , 08:16.989 --> 08:18.670 start the mixer and perform a 08:18.679 --> 08:20.735 functional check of the components , 08:20.735 --> 08:23.149 conveyor auger 08:24.059 --> 08:27.959 vibrators , shoot and get 08:27.970 --> 08:28.739 controls . 08:33.719 --> 08:36.719 Water systems , fill the water tanks on 08:36.729 --> 08:38.679 the mixer and perform a functional 08:38.690 --> 08:40.369 check of the water system . 08:42.400 --> 08:45.840 August system ensure that the spare 08:45.849 --> 08:48.039 auger system is secured to the front 08:48.049 --> 08:50.080 right side of the trailer and is in 08:50.090 --> 08:53.820 serviceable condition . Warehouse team , 08:54.760 --> 08:56.760 the warehouse team will deliver the 08:56.760 --> 08:58.871 repair materials to the volume metric 08:58.871 --> 09:00.969 mixer bagged , delivered by a tele 09:00.979 --> 09:03.590 handler and open on a bag breaker 09:03.599 --> 09:06.750 releasing material into the bin . Note , 09:07.260 --> 09:09.260 the warehouse team and water truck 09:09.270 --> 09:11.820 remains on call by the repair teams to 09:11.830 --> 09:14.280 deliver materials as needed to ensure 09:14.289 --> 09:16.299 continual operation of the mixer , 09:18.919 --> 09:22.239 volumetric mixing operations , start 09:22.250 --> 09:24.361 the engine of the mixer and lower the 09:24.361 --> 09:26.194 auger of the unit into operating 09:26.194 --> 09:28.539 position around a 25 degree angle 09:28.549 --> 09:31.679 depending on the surface and attach the 09:31.690 --> 09:35.049 auger chute open the a pour panel and 09:35.059 --> 09:37.170 set the protective cover in place for 09:37.170 --> 09:39.659 the auger mixing bowl . The operator 09:39.669 --> 09:41.891 will then adjust the conveyor speed for 09:41.891 --> 09:44.058 the unit and set the material gate for 09:44.058 --> 09:47.260 a standard mix level . Next , the water 09:47.270 --> 09:49.580 pump will be engaged using the control 09:49.590 --> 09:51.368 lever . In conjunction with the 09:51.368 --> 09:53.849 conveyor controls , the gear is set 09:53.859 --> 09:56.590 high for rapid set and low for flowable 09:56.599 --> 09:59.099 fill . At this point , the operator 09:59.109 --> 10:01.169 will engage the Agger allowing it to 10:01.179 --> 10:04.030 run up to speed following starting the 10:04.070 --> 10:06.900 Agger disengage the water pump and 10:06.909 --> 10:08.859 begin to advance material down the 10:08.869 --> 10:12.299 conveyor stop . Once it is around 10 10:12.309 --> 10:14.420 inches from the end of the conveyor , 10:14.530 --> 10:17.039 the water pump will be reengaged and be 10:17.049 --> 10:19.229 allowed to wet the mixing bowl and 10:19.239 --> 10:22.000 running a material will then be 10:22.010 --> 10:24.270 advanced and allowed to enter the 10:24.280 --> 10:26.710 mixing bowl to begin mixing concrete . 10:27.590 --> 10:29.479 The operator will then adjust the 10:29.479 --> 10:31.646 strike off gate to achieve the desired 10:31.646 --> 10:33.590 concrete mix which should have the 10:33.590 --> 10:35.368 appearance similar to that of a 10:35.368 --> 10:38.030 milkshake . In addition to periodic 10:38.039 --> 10:40.206 adjustments , operators should clean , 10:40.210 --> 10:42.330 build up of the concrete mix from the 10:42.340 --> 10:44.830 mixer to ensure it runs smoothly and 10:44.840 --> 10:47.250 has not become clogged or seize up the 10:47.299 --> 10:50.349 auger . The mixer is not producing 10:50.359 --> 10:52.415 concrete for the repair operations , 10:53.530 --> 10:55.641 knowing how to operate the volumetric 10:55.641 --> 10:57.929 mixer is most important . However , 10:57.940 --> 10:59.940 there are a few important items you 10:59.940 --> 11:01.884 should keep in mind . Let's take a 11:01.884 --> 11:04.500 moment to review and understand them of 11:04.530 --> 11:06.799 her position . The proper Agger 11:06.809 --> 11:09.109 position is based on the angle of the 11:09.179 --> 11:12.080 Agger in relation to the ground under 11:12.090 --> 11:14.150 normal level circumstances . The 11:14.159 --> 11:16.520 position of the auger is set at 20 to 11:16.530 --> 11:19.679 25 degrees . The auger mixing bowl will 11:19.690 --> 11:22.000 overflow if the auger angle is too 11:22.010 --> 11:25.260 steep . This optimal angle depends on 11:25.270 --> 11:28.119 where the mixer is positioned . The 11:28.130 --> 11:30.349 consistency of the concrete mix should 11:30.359 --> 11:33.150 resemble a gray milkshake , a runny 11:33.159 --> 11:36.270 slurry that pours easily and steadily . 11:37.520 --> 11:39.570 Environmental factors including 11:39.580 --> 11:41.919 community temperature and mixture 11:41.929 --> 11:44.289 properties affect this consistency . 11:45.349 --> 11:48.000 Operators control the mixed consistency 11:48.010 --> 11:50.409 by adjusting the gate height which 11:50.419 --> 11:52.520 alters the amount of mixed material 11:52.530 --> 11:54.780 that enters the conveyor and proceeds 11:54.789 --> 11:57.590 to the auger . Once you make an 11:57.599 --> 11:59.710 adjustment , you have to wait for the 11:59.710 --> 12:01.820 newly adjusted material to reach the 12:01.830 --> 12:03.960 end of the shoe before making further 12:03.969 --> 12:06.789 adjustments , mix , build up , 12:07.539 --> 12:09.929 monitor materials in the mixing bowl 12:09.940 --> 12:12.349 during operations . If the material 12:12.359 --> 12:14.799 gets too high , then add a water from 12:14.809 --> 12:17.031 your emergency water tank straight into 12:17.031 --> 12:19.253 the mixing bowl to prevent the material 12:19.260 --> 12:23.250 from getting too thick gate position . 12:23.900 --> 12:25.567 If the gate gets stuck during 12:25.567 --> 12:28.039 operations , use the spud bar to tap 12:28.049 --> 12:29.938 the gate while adjusting the gate 12:29.938 --> 12:32.010 controls to restore normal movement 12:33.919 --> 12:36.679 hopper vibrators . It is important to 12:36.690 --> 12:38.634 keep an eye on the amount of mixed 12:38.634 --> 12:40.634 material remaining in the hoppers . 12:40.890 --> 12:42.668 Operators should use the hopper 12:42.668 --> 12:44.834 vibrators once the material gets below 12:44.834 --> 12:46.946 the halfway point of the hopper bin , 12:47.609 --> 12:49.659 premature vibrating can cause the 12:49.669 --> 12:52.140 material to pack tightly in the hopper 12:52.150 --> 12:54.580 and not fall properly onto the conveyor . 12:55.500 --> 12:57.556 Now , let's look at using the volume 12:57.556 --> 12:59.556 metric mixer to produce material to 12:59.556 --> 13:01.609 backfill a repair or to create a 13:01.619 --> 13:04.330 concrete cap in radar operations . 13:05.669 --> 13:08.039 Rapid set concrete is used to create a 13:08.049 --> 13:10.840 strong quick setting repair . During 13:10.849 --> 13:13.159 the capping process , the repair crews 13:13.169 --> 13:15.760 placed a concrete mix across the repair 13:15.830 --> 13:18.469 to ensure an even placement in fair 13:18.479 --> 13:20.739 weather . Rapid set concrete has an 13:20.750 --> 13:22.969 initial set time of 45 minutes . 13:23.260 --> 13:25.250 Meaning the cap can handle radar 13:25.260 --> 13:28.770 vehicles and equipment traffic set time 13:28.780 --> 13:31.289 for aircraft traffic of all airframes 13:31.299 --> 13:34.590 is two hours backfilling . A repair 13:34.599 --> 13:37.059 provides a solid base to place a repair 13:37.070 --> 13:40.000 cap on in backfilling operations . The 13:40.010 --> 13:42.232 volume metric mixture is used to create 13:42.232 --> 13:43.899 a flowable fill material when 13:43.899 --> 13:46.010 backfilling for an asphalt cap , the 13:46.020 --> 13:48.242 fill operation is stopped approximately 13:48.242 --> 13:50.353 four inches from the runway surface . 13:50.650 --> 13:53.299 The flowable fill cures for 30 minutes 13:53.309 --> 13:56.929 prior to the placement of asphalt auger 13:57.059 --> 13:59.359 swap in the event of mixed auger 13:59.369 --> 14:01.619 failure or material seizes the auger . 14:01.890 --> 14:04.057 The following steps should be followed 14:04.057 --> 14:07.219 for a successful auger swap since each 14:07.229 --> 14:09.229 mixer is shipped with an additional 14:09.229 --> 14:11.229 auger . Ensure everyone is familiar 14:11.229 --> 14:13.580 with Auger swap operation . Current 14:13.590 --> 14:15.812 recommendation is to be able to swap an 14:15.812 --> 14:18.679 auger in 30 minutes or less . Practice . 14:18.690 --> 14:21.809 Practice . Practice failed auger 14:21.820 --> 14:25.359 removal , disconnect hydraulic water 14:25.369 --> 14:27.450 lines and electrical connectors from 14:27.460 --> 14:30.530 the control system . Lower the auger to 14:30.539 --> 14:33.549 horizontal position . Disconnect the 14:33.559 --> 14:35.559 electrical connector from the shoot 14:35.559 --> 14:37.503 vibrator and remove the transition 14:37.503 --> 14:41.000 chute , remove the rapid release ear by 14:41.010 --> 14:43.330 removing the pins and rotating the cam 14:43.340 --> 14:46.479 lever 98 degrees up and off the ear . 14:47.599 --> 14:49.659 Place the auger on the ground and 14:49.669 --> 14:51.729 remove the link pins , disconnecting 14:51.739 --> 14:54.780 boom to auger , leave the felt auger on 14:54.789 --> 14:58.270 the ground , pull the unit forward to 14:58.280 --> 14:59.520 receive the auxiliary 15:01.780 --> 15:05.450 auxiliary auger removal . The auxiliary 15:05.559 --> 15:07.615 Agger is stored on a single pivoting 15:07.615 --> 15:10.260 tube . Release the auger using the 15:10.270 --> 15:12.700 following procedures . A forklift is 15:12.710 --> 15:15.919 required release the ratchet straps , 15:15.929 --> 15:17.873 securing the anchor to the mixture 15:17.873 --> 15:20.619 trailer position , forklift . So the 15:20.630 --> 15:22.969 forks can be inserted into the slots of 15:22.979 --> 15:26.559 the lifting clamps , pull the Agger out 15:26.570 --> 15:28.950 from the machine until the pin clears 15:28.960 --> 15:32.460 the rear holding bracket , lift the 15:32.469 --> 15:34.469 auger to clear the lip on the pivot 15:34.469 --> 15:37.320 tooth , remove the auger straight from 15:37.330 --> 15:39.441 the machine to clear the pivot tube . 15:40.890 --> 15:43.159 Once the unit is pulled forward , move 15:43.169 --> 15:45.229 forklift forward , placing the Agger 15:45.239 --> 15:49.070 under the mixing bolt auger 15:49.080 --> 15:51.510 installation place auger on the ground 15:51.809 --> 15:54.489 back forklift out of slots on lifting 15:54.500 --> 15:57.270 clamps , remove lifting clamps from 15:57.280 --> 15:59.900 auger , lifting clamps can be installed 15:59.909 --> 16:02.131 on the feed auger for placement back on 16:02.131 --> 16:05.760 the pivoting tooth , insert link pins , 16:05.770 --> 16:09.200 connecting boom to auger place things 16:09.210 --> 16:11.210 slight down force at the end of the 16:11.210 --> 16:13.099 auger . Raise auger to horizontal 16:13.099 --> 16:16.739 position , install rapid release ears , 16:16.750 --> 16:20.669 cam levers and pins attached transition 16:20.679 --> 16:22.679 chute an electrical connector for a 16:22.679 --> 16:26.289 vibrator to auger , connect hydraulic 16:26.299 --> 16:28.609 water lines and electrical connectors 16:28.619 --> 16:31.950 to control systems function check auger 16:31.969 --> 16:33.929 to ensure operational readiness , 16:36.409 --> 16:38.640 volumetric mixer capping operations . 16:39.210 --> 16:41.380 The concrete capping operation can 16:41.390 --> 16:43.479 begin once the volumetric mixer is 16:43.489 --> 16:45.600 brought to the repair and their crews 16:45.600 --> 16:47.820 load repair materials , fill the water 16:47.830 --> 16:51.010 tank and start . The mixer . Operators 16:51.020 --> 16:53.242 must be shared to set the mixer for the 16:53.242 --> 16:55.979 proper material and water ratio and 16:55.989 --> 16:59.039 then lower the auger into place . Once 16:59.049 --> 17:00.938 the chute has been attached , the 17:00.938 --> 17:03.049 mixture can begin to advance material 17:03.049 --> 17:05.779 and place concrete . Operators must 17:05.788 --> 17:07.844 remember to check the consistency of 17:07.844 --> 17:10.239 the mix regularly and adjust as needed . 17:11.189 --> 17:13.411 Following the direction of capping crew 17:13.411 --> 17:15.739 lead . The operator swings the auger to 17:15.750 --> 17:17.861 provide consistent coverage while the 17:17.861 --> 17:19.861 capping crew evenly distributes the 17:19.861 --> 17:22.959 concrete . Once finished , the captain 17:22.969 --> 17:25.209 crew signals the mixer operator to stop 17:25.219 --> 17:28.599 the auger , finishing the cap . Several 17:28.609 --> 17:30.776 members of the capping crew assist the 17:30.776 --> 17:33.310 screen operator to ensure a flat repair . 17:34.079 --> 17:36.680 A reed is set at the edge of the repair 17:36.880 --> 17:39.047 and slowly dragged across the repair , 17:39.150 --> 17:41.439 smoothing the top layer of concrete and 17:41.449 --> 17:43.520 making it even with the edges of the 17:43.530 --> 17:46.530 existing surface . This is repeated as 17:46.540 --> 17:48.596 needed until the surface is properly 17:48.596 --> 17:51.030 finished . Once sufficient material is 17:51.040 --> 17:53.560 placed , the volumetric mixer proceeds 17:53.569 --> 17:55.609 to the next repair to begin capping 17:55.619 --> 17:57.780 operations again or off site 17:59.170 --> 18:02.079 cleaning the volumetric mixer . The 18:02.229 --> 18:04.229 biometric mixer should be clean and 18:04.229 --> 18:06.760 expected after operations . In addition , 18:06.979 --> 18:09.201 a visual inspection should be performed 18:09.201 --> 18:12.270 after any repair , any debris or build 18:12.280 --> 18:14.502 up should be removed . To ensure proper 18:14.502 --> 18:16.739 operation and to prevent damage to the 18:16.750 --> 18:19.770 mixer , all installations should have 18:19.780 --> 18:21.836 either a dedicated or temporary wash 18:21.836 --> 18:24.969 out station . Established mixer 18:24.979 --> 18:27.201 operators are responsible for using the 18:27.201 --> 18:29.410 wash out station to clean the mixer 18:29.420 --> 18:31.476 since it's likely that they are most 18:31.476 --> 18:34.209 familiar with the equipment to clean 18:34.219 --> 18:36.869 the mix of the operator checks out all 18:36.880 --> 18:39.213 the repair material has been discharged , 18:39.400 --> 18:42.270 flushes the bin quickly reports to the 18:42.280 --> 18:44.489 washout location . So any remaining 18:44.500 --> 18:47.900 residue can be removed . The internal 18:47.910 --> 18:50.199 components of a volumetric mixer like 18:50.209 --> 18:53.040 the mix auger and conveyor are areas 18:53.050 --> 18:55.217 where concrete build up often occurs . 18:56.640 --> 18:58.640 The volumetric mixer comes equipped 18:58.640 --> 19:00.640 with a pressure washer built in for 19:00.640 --> 19:03.530 cleaning the mixer during and after use . 19:03.540 --> 19:05.651 This assists in keeping material from 19:05.651 --> 19:07.873 building up inside the mixer components 19:07.873 --> 19:09.873 and causing it to fail during vital 19:09.873 --> 19:12.250 radar operations . The built in 19:12.260 --> 19:14.482 pressure washer on the volumetric mixer 19:14.482 --> 19:16.482 runs off the emergency water tank , 19:17.250 --> 19:19.306 take care when cleaning the auger on 19:19.306 --> 19:21.528 site to prevent the cleaning water from 19:21.528 --> 19:24.699 draining into the repair caution for 19:24.709 --> 19:27.369 pro all machines . 2018 and older , the 19:27.380 --> 19:29.436 pressure washer cannot be engaged on 19:29.436 --> 19:31.491 the mixer while trying to adjust the 19:31.491 --> 19:33.713 position of the Agger . This will cause 19:33.713 --> 19:35.713 the hydraulics to be overloaded and 19:35.713 --> 19:37.839 cause the mixer to shut itself off . 19:37.989 --> 19:39.822 This may have the consequence of 19:39.822 --> 19:41.878 locking up the Agger and endangering 19:41.878 --> 19:43.711 the continued use of the mixer , 19:44.250 --> 19:47.109 volumetric mix or maintenance . It's 19:47.119 --> 19:49.175 important to maintain the volumetric 19:49.175 --> 19:51.063 mixer in good working condition . 19:51.270 --> 19:53.390 Follow the manufacturer's manual for 19:53.400 --> 19:55.733 all preventive maintenance requirements . 19:56.099 --> 19:59.030 Volumetric mixer summary , volumetric 19:59.040 --> 20:01.109 mixers are used to produce repair 20:01.119 --> 20:03.890 material for radar operations . This 20:03.900 --> 20:05.733 piece of equipment is a critical 20:05.733 --> 20:07.959 component of the radar process and is 20:07.969 --> 20:10.180 instrumental in allowing engineers to 20:10.189 --> 20:12.109 produce material quickly to meet 20:12.119 --> 20:14.439 completion . Timelines without the 20:14.449 --> 20:16.689 specialized equipment and rapid setting 20:16.699 --> 20:19.040 materials , repairs would be impossible 20:19.050 --> 20:21.069 to complete within the stringiest 20:21.079 --> 20:22.949 guidelines established to resume 20:22.959 --> 20:26.510 airfield operations . We have 20:26.520 --> 20:28.187 provided the proper operating 20:28.187 --> 20:30.353 procedures for the volume metric mixer 20:30.449 --> 20:32.369 to ensure mission success . The 20:32.380 --> 20:34.469 following are some actions to avoid 20:34.949 --> 20:37.439 paving lane lifts should not exceed 11 20:37.449 --> 20:39.900 ft to keep the repair manageable when 20:39.910 --> 20:42.040 using rapid setting concrete and 20:42.050 --> 20:44.217 because the street in the tool trailer 20:44.217 --> 20:47.099 is only 12 ft long , the length of the 20:47.109 --> 20:49.430 form section should be no greater than 20:49.439 --> 20:50.280 15 ft . 20:52.410 --> 20:54.466 Congratulations . You have completed 20:54.466 --> 20:56.599 the volumetric mixer lesson . In this 20:56.609 --> 20:58.665 lesson , you learned how to properly 20:58.665 --> 21:01.099 use the volumetric mixer components of 21:01.109 --> 21:03.689 the volumetric mixer available concrete 21:03.699 --> 21:06.650 mixtures , biometric mixer operations 21:07.010 --> 21:09.010 and cleaning and maintenance of the 21:09.010 --> 21:12.030 volumetric mixer . For the most current 21:12.040 --> 21:14.150 TT P and additional information . 21:14.170 --> 21:16.040 Please visit the Air Force Civil 21:16.050 --> 21:18.060 Engineer Center , expeditionary 21:18.069 --> 21:19.760 engineering SharePoint page .