Waste tire asphalt standard officially released
In January 2013, the "Technical Requirements for Waste Tire Rubber Bituminous Road" prepared by the Beijing Municipal Communications Committee was successfully completed and officially released. It will be implemented starting from July 1, 2013. The standard is applicable to the construction and modification of the structural layers and pavement functional layers of road projects; the technical requirements for rubber tire asphalt , rubber asphalt mixtures , and hot-sprayed rubber asphalt waterproof adhesive layers for road engineering are specified. Our country has carried out research in this area for more than 20 years, especially in the last 5 to 6 years. Under the background of the rapid development of the national economy, research on the application technology of waste tire rubber powder in asphalt pavement has made breakthrough progress. . Especially in recent years, waste tire rubber asphalt has been successfully applied in major projects such as the Chang An Street Overhaul Project, the 110 National Road Reconstruction Project, and the Beijing Olympic City Road Construction Project. According to preliminary calculations, at present, Beijing employs more than 100,000 tons of tire rubber asphalt mixture annually. Each ton of tire rubber bitumen is 200-600 yuan lower than SBS modified asphalt, which can save construction cost of more than 20 million yuan per year; it can extend the maintenance and repair period for more than 3 years; it can reduce tire or road noise by more than 3dB(A). The implementation of the standard is important for standardizing the preparation of waste rubber asphalt and its mixture in Beijing, ensuring the quality of rubber tire asphalt pavement, and promoting the application of tire rubber asphalt in the construction of roads in Beijing, which is beneficial to the use of waste tires. Environmental recycling. May be the cabinet of aluminium alloy used for manufacturing later, people developed the push-pull cabinet.Push-pull cabinet did not stop the problem, because of push-pull cabinet casement opening and closing of stationary state basic same. Cabinet Hardware,Zinc Die Casting Cabinet Handle,Zinc Die Casting Cabinet Switch,Coated Cabinet Hardware NINGBO ZHENHAI BOLANG METAL PRODUCT FACTORY , http://www.blcastings.com
One disadvantage of push-pull cabinet is a must have at least one fixed fan, greatly reduce the cabinet area: the other is a fatal weakness could not meet the requirements of air tightness and water tightness.
Of push-pull cabinet casement fixed point is up and down two guide rail, so the wind pressure strength is limited.Modern building more and more high to the requirement of energy conservation and other functions, the sealing of the cabinet, sound insulation and heat insulation, air tightness and water tightness and wind resistance strength and security level, there are strict requirements.To meet the requirements of a variety of integrated and produced within the batter casement cabinets, or the Europe type cabinet.
The cabinet of modern glass curtain wall building model related to the cabinet frame on the wall of the fixed way.Because the glass curtain wall of air tightness, water tightness and wind resistance strength of the demand is higher, on the curtain wall cabinet accessories, according to the need to develop relatively independent.
Modern architecture of the cabinet is not confined to the level of manpower and starting from the requirements of ventilation heat removal, the height of the cabinet is an important factor decided to take a breath row of thermal efficiency, so people invented all kinds of cabinet.