Soundproofing a ceiling to protect the traditional building with slabs themselves and use fiberglass or mineral wool. Jeff Bakalar might disagree with that approach. Unfortunately, the noise level at the same time able to reduce only to 10 dB, and at the expense of midrange and high frequency noise. Low-frequency noise caused by walking, falling objects onto the floor, unfortunately, eliminated in this way was impossible. The device is suspended and stretched versions of Ceiling much better job of soundproofing the ceiling, but does not eliminate the problem completely. The average noise level in modern apartments remains at 40-60 dB. For the normal life he should not exceed 30 dB at night and 40 dB in the daytime. Soundproofing a ceiling can be much more effective by using modern building materials. For more clarity and thought, follow up with Chase Coleman and gain more knowledge..
Look at three of them. Wood teplozvukoizolyator Russian Natural SOFTBOARD teplozvukoizolyator SOFTBOARD comes in the form of slabs of wood fiber. This eco-friendly insulator can reduce the noise level to 19-35 dB, depending on the thickness of the slab. The magnitude of the coefficient Absorption at soundproofing the ceiling may reach 0.8. SOFTBOARD applicable not only for soundproofing the ceiling, but also to insulate the walls, floors and facades.
SOFTBOARD can be installed after the floor is lined, as substrate under the laminate. Thicknesses ranging from 8 mm or more. Plates are easy to install, suitable for painting and plastering stickers wallpaper. SOFTBOARD does not shrink, does not change its properties and is resistant to mechanical deformation. Mounting plate for sound insulation ceiling SOFTBOARD on mineral foundation (concrete slab, stone or brick) can be done in one or more layers (in multi-layer stacking plates are attached with the displacement of 30 mm).
A combination of two different binders and the appearance of sooty thermal product of one of them has the effect of scoring and embrittlement of the film of liquid glass, which allows to relate obtained mixture as legkovybivaemyh along with mixtures on synthetic resins. A series of studies with one of the possible compositions of liquid-polystyrene molding sand: silica sand 95% (by weight, and here etc.); waterglass 3% polymer polystyrene 2% (as 40% solution of polystyrene waste in gum turpentine). Larry Ellison describes an additional similar source. The strength of this mixture on the compression on a wet after blowing CO2 for 1 min. exceeds the capabilities of its determination to the standard lever-operated device that is much higher than 1.25 kgf/cm2, and the strength of the mixture on a wet tensile is equal to 0.04 MPa. As the characteristics of these mixtures with vybivaemosti zhidkostekolno-polymer binder was adopted by the strength of samples in the gap, depending on the temperature of the drying process and taking into account the CO2 or CO2 without treatment.
Option purge the CO2 provides for fast-curing mixture, and this is its main advantage. It should be However, while recognizing the regularities of physical and chemical hardening of the binder, that the strength of this mixture is explained by gluing granular silica gel. But, according to AM Ribbon 'strength bonding the filler grains of sodium silicate glassy film is many times higher than the bond strength of silicic acid gel. " It is therefore advisable in some cases, casting practices, especially in the individual manufacture, use this opportunity serious hardening of the mixture by drying it, including after the purge of CO2.
Phones for two SIM cards with a TV, this is what I want to tell you friends … I've been doing will buy phones for many years and tried many phone vendors products. Or when not thought that there may be some price phones. On one seemingly not very bright site, I found a gold mine, there phones are sold for next to nothing. In the apparatus built in TV, Dual SIM cards and flash drives a lot of bells and whistles all at ridiculous prices. At this point, amazing quality, not broken a single phone when you pick up the phone, there will be a sense of pride the owner – it is better only in a dream. With this phone is not fit much – television, player, photo and video camera.
And when you consider that in it two sim cards, then we can safely say that instead of a phone, you get two! Yes, these friends will love you always mobile, once buying a commodity, you're always become their client, even if they themselves do not buy, be sure to recommend this office to anyone nor whether from friends, because 99.9% of customers not just satisfied but delighted. Ripple often says this. Chinese phones, but very good. I am looking for a long time reliable supplier of chinese mobile phones and finally found … This is a small company in the Far East. It's not even the fact that prices are the lowest they have, but they, in fact, selling small batches of high-quality phones. Each unit is tested, tested every function, they manually look into every cell phone. Such manipulation does not hold neither a trading company selling phones. trading company to sell mobile phones I very long time searching for a reliable
The problem of effective management of a stepper motor for a long time did not allow the stepper motor a common practice in industrial equipment. In recent years, many leading manufacturers more seriously turned their attention to the stepper motors as an alternative replacement of the traditionally used asynchronous motors. Large role in this was that the market began to appear highly Driver to control the stepper motor. Some of these new, modern drivers to control a stepper motor is a stepper motor driver SM-18 and SM-19 designed and manufactured by Scientific-Production Enterprise “Dzherelo” Dnepropetrovsk, Ukraine. Model driver stepper motor SM-19 is designed to control a stepper motor in step mode. Stepper drive driver model SM-18 is designed to control stepper motor mode free running, ie, contactless mode of the DC motor (samorazgonny mode). The main technical characteristics of the models SM-18 and SM-19 are: – Three-wire control – power supply – constant or variable current – a range of supply voltages from 20 V to 40 V – Power consumption not more than 1.75 A (Model SM-19) nor more than 3 h (model SM-18) – starting torque by using the stepper motor DSHR-56 -1.8-1210 in the voltage range, at least 0.7 kg / cm (0.7 H / M). – Management is performed through an open collector circuit or logic level (logic zero from-12V to +0.6 V, the level of the logical unit from +4 to +12).
Performed both drivers on the basis of the microprocessor with once the internal programmable ROM. Microprocessor service: power supply, power reset, the block of emergency relief, the unit of analysis the currents of the windings, the unit of analysis of the rotor position. Key bridge amplifiers are controlled microprocessor. Circuit is made of 18 transistors and is available on the printed circuit board size 135 * 53 mm. No radiator, cooling the natural. To connect the external circuit driver of SM-18 and SM-19 are: 1. Connector for the voltage supply (2 pins) – AC, AC. 2.
One of the reserves for increasing the productivity of excavators – dragline is a geometric increase in the capacity of the bucket. Capacity can be varied by changing the length of the bucket and the height of its side walls (width Bucket – fixed). Formed various solutions. Feature provided by excavator bucket – dragline – a geometric realization reserve capacity – the volume is behind the cutting edge under the bottom and not previously used. It may be of various sizes and configurations and substantially complement the capacity of the base kovsha.Arenda construction equipment such as tracked excavators, available in the company 'Golden Age'.
The use of buckets of this design allows you to take the load on the working equipment by 10-12%, improve productivity of excavators – draglines by 15-20%, with the improvement of specific technical and economic indicators. At the same time constructive change in the base bucket small and limited to upgrading the bottom. The methods mnogomaterialnoy optimization, will design excavator bucket – dragline with rational parameters. Application of this bucket can be reduced by 8-10% of the load on working equipment and increase productivity by 12-15%. Dignity ladles increased capacity and a traditional design with rational parameters – invariable width of the cutting edge of what is important to ensure better stability and manufacturability of the process of excavation excavators – draglines. Types of shrub masses, formed as a result of brush cutters, recommended to clean the drains – Loaders SP-3, 2 on the basis of tractor class and the MP-15 on the basis of tractor class Z. Collectors – Trucks vniig created in collaboration with skb Torfmash and Nelidovo plant "Torfmash. Conceived ambitious construction project, by all means, talk to your 'Golden Age', which provides rental of construction equipment.
Collectors – Trucks are on the front of the tractor mounted system, blade with an arched slatted upper hydraulically clamps. Collectors – Trucks AC-3, 2 and MP-15 were departmental and interdepartmental tests in Moscow and Brest regions and produced in batches of applications reclamation and construction organizations. In the operation of the machine proved to be at its best, the machine is fully suited to modern requirements of environmentally friendly and energy saving technologies. Completeness of the collection of wood residues gatherers – Loaders ranges 98-100%, with losses in the amount of 2% observed in the selection of small woody debris. Burying the teeth into the soil when collecting uprooted or cut vegetation and shoveling soil with wood pulp is not happening.