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The working principle of optical fiber
- Optical fiber: the practical application of total reflection principle
Optical fiber is made of two or more transparent materials with different refractive index through special composite technology made of composite fiber.s
How to do a good job on the wall when the level of leveling work
- 1. Check the ground humidity, confirm the ground dry; check the ground flatness, confirm the ground level; check the ground hardness, the ground should be no cracks.
2. Thoroughly clean the ground, remove all kinds of dirt on the ground, such as paint, oil and paint and so on. Fully polished the ground.
3. completely suck the dust.
4. The interface agent with a foam roller coating, 1: 1 watered, the amount per square meter is about 100-150 grams.
5. After the application of the interface agent, wait for 1-3 hours to maintain good ventilation, so that it is completely dry. And then self-leveling construction.
6. If it is a commercial self-leveling cement (25 kg) a bag should be poured into a 6 kg of clean water in the mixing bucket, if it is super self-leveling (25 kg) a pack should be poured into 6.5 kg of clean water Stir the barrel, with a pulp drill to stir until the formation of uniform flow of the mixture. Must ensure that no caking. And then quickly mix the mixture into the construction area, with a rake will be uniform gravity cloth, and roll with a roller, the air release. Pay attention to the reasonable arrangements for the construction staff to ensure that within 15 minutes will be a good mix of a pack of self-leveling cement construction. Complete 2 mm thick, each pack can be coated about 8 square meters.
7. After about 24 hours, self-leveling cement is completely dry, 1-2 days after the floor laying. Note:
Ground temperature below 5 degrees can not be self-leveling cement construction. The above-mentioned drying time is applied at room temperature of 20 ° C under normal conditions. This drying time will be extended due to low temperature and high humidity.s
Do I need more ceiling insulation?
- The minimum ceiling insulation should be R-30, with R-40 being the norm in the northern part of the U.S. The depth of insulation required to produce a R-30 depends on the type of insulation. Blown-in fiberglass will have about R-2.25 per inch, blown-in cellulose has about R-3.5 per inch and fiberglass batt has about R-3 per inch. In case you're not sure what type you have, fiberglass insulation looks like cotton candy, while cellulose looks likes ground-up newspaper. Batts are the best to install as there will be less airborne particles to breath, get in your eyes, etc. You just cut them to size and lay them across the ceiling joist so they seal any gaps caused by the ceiling joist, fans, light fixtures, etc.s
Specification for acceptance of glass cord sound - absorbing cotton
- The use of high-quality ultra-fine glass fiber high-pressure forming, positive and negative sides covered with glass fiber cloth, the use of professional equipment to play a different surface effect of the product performance of environmental protection, fire, moisture, comfort, antibacterial and decorative economy, anti-pollution, light, shock, environmental protection, European products, raw materials, Production of ultra-fine glass fiber, lead-free, mercury, chromium, asbestos and other harmful, toxic, no smell, the developed countries have been widely used glass fiber products in China, glass fiber product standard design institute included in the standard design Set (03j502-2) Following the gypsum board, silicon calcium board, mineral wool board after a new generation of glass fiber sound-absorbing ceiling. Fireproof European products are all in line with China's highest fire safety standards a (non-flammable level), after a number of European fire tests, have reached the highest level (mo) level. European products using glass fiber and basalt ore as the substrate, the substrate of the non-flammable determines the superior fire resistance, and will not produce toxic gases, no smell. Moistures
How does the decoration project prevent molds from wet weather?
- 1, should be selected when the weather is relatively dry when the closure plate. 2, the latex paint should be carried out in sunny dry weather. 3, hanging keel check whether the good discharge of sewage pipes and so on and whether it is located in the bathroom upstairs toilet and other wet positions, if you do first to do a waterproof.s
Recessed lighting on cathedral ceiling - disaster?
- with that type of light they need to have free air around them ,you dont have enough space,nor would you roof be insulated, you may wish to rethink your lighting , the joys of remoldings
How to install spray foam insulation bet ceiling rafters, with only suspended ceiling beneath?
- The plastic might tear or sag when the weight of the foam is applied. You could staple thin sheets of underlayment or OSB to the bottom of the joists then spray the foam from the top. Basically, you are trying to keep the place warm that has no ceiling and any heat goes up and around the drop ceiling, thru the insulation and out of the building. That's how I understand your problem. Maybe you should just remove the suspended ceiling, nail up drywall and use the existing fiberglas between the joists with another fiber glass layer perpendicular to the joists on top of the old stuff. Or blown in insulation. You better test the foam for flamability. Some of that stuff can burn and emit toxic fumes that will kill a whale. The other disadvantage of foam is that moisture will not penetrate it, so you might have condensation on the ceiling. Drywall will allow moisture to pass thru and sheathing and Tyvex are also designed to breath. You don't want to trap moisture inside any place you live. That would create a whole bunch of problems. Black mold being one of them.s
How good is the Burton Hotel in Dubai?
- Is the world's newly built the highest sailing hotel. The outer layer is double glass fiber screen design, in the sun was bright white, night was rainbow color. The facilities within the hotel also make it an advanced building in the world today.
All 202 suites are equipped with sophisticated multimedia systems that offer free movie selection, internet, online shopping and information services. Guests can enjoy 42 stereo channels on a 42-inch wide-screen plasma TV and enjoy full stereo sound. The hotel's luxurious service also includes private attendants, private lifts, rotating beds and private cinema. And each customer has a chef, driver, housekeeper, deputy steward, waiter and other seven people for their services.s
How to open a lock with a credit card
- Do you know the credit card?And do you know how to open a lock with a credit card? 1，the credit card is overdrawn interest free card。2，if your credit is good, you can repay o...
How to become a construction Project manager
- Construction project managers combine their expertise in engineering and management to deliver projects on time and within budget.They prepare work schedules;manage a team that inc...
Architectural style of construction companies in london
- Construction companies in london specialize in the construction and construction of the new, expansion, renovation and removal and other related activities. There is no doubt that ...
What aluminium composite can be used for
- Description: Aluminium composite is with Nano-PVdF paint layer coated on front aluminium foil. Besides all good features of PVDF panel, but also coats PE(Polyester) paint and becau...
What's Composite panel association
- The Composite Panel Association (CPA) is the North American Trade Association for manufacturers of particleboard (PB), medium density fiberboard (MDF), and other compatible product...