Load wheel Sticky sand Tester This device includes a motor, gear transmission system, crankshaft, connecting rod, weight box, rubber casters, and an electrical controller with a digital counter display. Ready to work 1. Prepare coarse and fine aggregates and fillers according to the required grading ratio and dry them thoroughly. 2. Pressing The thickness of the test mold should be larger than the diameter of the largest mineral particle. Use the 25% principle to select the appropriate thickness for the test mold. 3. The mixing ratio of each component in the sample is based on the proportion of mineral materials, filler, additive, and emulsified asphalt or modified emulsified asphalt determined through a mixing test. 4. Weighing Take a total weight of 500g. Place the mineral material in the mixing pot, add the filler, mix well, then add water and mix again. Finally, add the emulsified asphalt or modified emulsified asphalt and mix for no more than 30 seconds ± 2 seconds. Pour the mixture into the test mold and quickly flatten it. The flattening process must be done once only, without reworking. The entire operation should be completed within 45 seconds. If the surface of the molded specimen is uneven, discard it. 5. Dry the sample in an oven at 60°C until it reaches constant weight, typically for at least 16 hours. Remove the sample and allow it to cool to room temperature. Controller usage: Plug the power cord into a three-phase four-wire socket and turn on the power switch. The digital counter displays 1000 working states. Press the "SET" button to change the setting to 100. Use the "â–³" or "â–½" keys to adjust the count value as needed. Once set, press the "Start" button to begin operation. Experimental procedure: 1. Adjust the load wheel tester so that the load mass is 56.7kg. 2. Mount the sample correctly on the specimen carrier. 3. Maintain the experimental temperature at 25°C ± 2°C. 4. Lower the rubber wheel and press it onto the specimen. 5. Reset the counter to zero and set the rolling frequency to 44 cycles per minute. 6. Start the rolling. After 1000 cycles (if the sample becomes sticky during the process or appears bright, lightly spray some water to prevent adhesion), stop, unload, rinse, and dry the sample to constant weight (at 60°C for at least 16 hours). Cool it to room temperature and weigh it (mâ‚), accurate to 0.1g. 7. Reinstall the sample in its original position. Place the sand frame over the sample, pour 300g of 82°C hot sand into the frame and flatten it (or use 200g of 82°C hot sand and place a steel cover in the center of the sand frame). Lower the rubber wheel and roll for 100 times. 8. Remove the sample, brush off any loose sand with a brush, and weigh the total mass (mâ‚‚), accurate to 0.1g. Calculation: The amount of sand adhered per unit area of the emulsified asphalt slurry seal mixture is calculated using formula (1): Where: LWT—Sand adhesion per unit area of the emulsified bitumen sealant mixture, g/m²; A—sample contact area, m²; mâ‚—mass of the sample after 1000 rolls, g; m₂—total mass of the sample and added sand after 100 rolls, g. Precautions: 1. After use, turn off the power, lift the load wheel with the bracket, and clean and maintain the equipment. 2. Check the gearbox for oil levels every 3–6 months and refill if necessary. The name of wireless router can be separated out of two keywords: wireless and routing. Understand the technical principle behind these two words, you understand the wireless router. Wireless Router,Wifi 6 Wireless Router,Mesh Wifi Router,Wifi Routers For Home Shenzhen MovingComm Technology Co., Ltd. , https://www.movingcommtech.com
LWT =
(mâ‚‚ - mâ‚)
A
Wireless is also what we often call Wi-Fi. Wireless routers can convert home broadband from wired to wireless signals, and all devices can happily surf the Internet as long as they connect to their own Wi-Fi. In addition, these devices also form a wireless local area network, where local data is exchanged at high speed and is not limited by the bandwidth of home broadband.
For example, many people have smart speakers in their homes that can be used to control various smart appliances. When you say small X small X, turn on the TV, the speaker actually finds the TV through the LAN and sends instructions, and does not need to connect to the Internet; And if you let it broadcast news, you have to get data through the Internet.
The Local Area Network we talked about earlier, also known as the Intranet, is represented by the Local Area Network (LAN) on the router, so the Wi-Fi signal is also called WLAN(Wireless LAN); The Internet we want to access, also known as the extranet, is represented on the router by the WAN(Wide Area Network).
On the Intranet, the IP address of each device is different, which is called a private address. All devices on the Internet share the same public address, which is assigned by broadband operators such as China Telecom Unicom.
The router is the bridge between the Intranet and the external network. The above mentioned IP address translation, packet forwarding, is the router routing function.
In other words, the router is the hub of the home network, and the data of all the devices must be forwarded through it to access each other or reach the external network, which means that one husband is the key and ten thousand men are not open, so the comprehensive router is also called "home gateway".