Asphalt Z-theoretical density meter

Product Introduction

Cangzhou Huayang Instrument ProductionAsphalt maximum theoretical density meterThe product has reliable quality, stable performance, and is suitable for determining the theoretical maximum relative density of asphalt mixtures using vacuum method. Used for asphalt mixture mix design, road condition investigation, or pavement construction quality management calculation of void ratio, compaction degree, etc.

Asphalt maximum theoretical density meterTechnical Specifications:

Power supply voltage: 220V ± 10%;

Extraction power of 160W;

Working mode: manual/automatic;

Vibration machine power 30W;

Container capacity: 4300ml x 2 pieces;

Pressure range 0-100MPa automatic control;

Asphalt maximum theoretical density meterTest method:

1. According to the sampling method of T0701 asphalt mixture in this regulation, or take (or drill) asphalt mixture samples from the asphalt pavement. The number of samples shall not be less than the following specified quantity: the nominal maximum particle size (mm) of the aggregate in the asphalt mixture shall be 37.5, 4000, 26.5, 2500, 19.0, 2000, 13.2, 16.0, 1500, 2, 9.5, 1000, 4.75, 500. The asphalt mixture aggregates shall be carefully dispersed, with coarse aggregates not crushed and fine aggregate aggregates dispersed to less than 6.4mm. If the mixture is hard, it can be dispersed after appropriate heating in an oven, generally at a heating temperature not exceeding 60 ℃. The dispersed samples shall be opened by hand and shall not be crushed with a hammer to prevent aggregate crushing. When the sample is a non dry mixture taken from the road, it should be dried with an electric fan to a constant weight before operation. 3. Negative pressure container type 4, calibration method for negative pressure containers: Fill Class B and C negative pressure containers with water at 25 ℃± 0.5 ℃ (cover them with a glass plate to keep them completely filled with water), and correctly weigh the total mass (m b) of the negative pressure container and water. 5. When using Class A containers, immerse the entire container in a constant temperature water bath at 25 ℃± 0.5 ℃ and weigh the water mass (m I) of the container. 6. Dry the negative pressure container, number and weigh its mass. 7. Load the asphalt mixture sample into a dry negative pressure container, weigh the total mass of the container and asphalt mixture, and obtain the net mass m a of the sample. The sample mass should not be less than the minimum quantity specified above. 8. Inject water at approximately 25 ℃ into the negative pressure container to fully immerse the mixture. 9. Connect the negative pressure container to the vacuum pump and vacuum gauge, and start the vacuum pump to achieve a vacuum degree of 97.3kpa (730mmHg) for 15 minutes ± 2 minutes. 10. Then vigorously oscillate the negative pressure container to thoroughly stir the mixture with water and remove any remaining bubbles. Shake several times every 2 minutes until no bubbles appear. To facilitate the removal of bubbles, a surfactant with a concentration of 0.01% can be added to water (such as adding 0.01g of detergent per 100ml of water). 11. When the negative pressure container adopts Class A container, immerse it in a constant temperature water bath insulated to 25 ℃± 0.5 ℃ for about 10 minutes, and then weigh the water mass (m2) of the negative pressure container and asphalt mixture. When using Class B or C negative pressure containers, immerse the container containing the asphalt mixture sample in a constant temperature water bath that has been insulated to 25 ℃± 0.5 ℃ for about 10 minutes, then remove it and cover it to make sure there is no air in the container. Wipe off the moisture outside the container and weigh the total mass (mc) of the asphalt mixture sample in the container and water

Hebei Ruida Construction Instrument Equipment Co., Ltd
Production and sales: highway testing instruments, railway testing instruments, concrete testing instruments, universal material testing machines, pressure testing machines, cement testing instruments, geotechnical testing instruments, asphalt testing instruments, mortar testing instruments, waterproofing membrane testing instruments, building energy-saving testing instruments, surveying instruments, main structure testing instruments, steel structure testing instruments, non-destructive testing instruments, wire and cable testing instruments, pipe and fitting testing instruments, ceramic tile testing instruments, insulation material testing instruments, coating testing instruments, geosynthetic material testing instruments