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Anchor Bolts Higher Level Requirements
Oct 10, 2017

The development of exterior insulation products of building exterior wall, because of the low energy-saving standards, and more use of good thermal conductivity of organic insulation materials, Anchor Bolts such as molded polystyrene Board (EPS), extruded Polystyrene Board (XPS), rigid polyurethane plate (PUR), and so on, the thickness of general 3~5cm, thermal insulation material weight is lighter, Anchor Bolts Insulation Anchor bolt length is generally not more than 10cm, external wall insulation system out of the event is not uncommon. With the adjustment of the policy and the competition of the white-hot market, the high buildings begin to use the inorganic insulation materials such as rock wool and foamed cement board. The thermal conductivity of inorganic thermal insulation material is large, to achieve the same insulation effect needs thicker materials, and the apparent density is also the organic insulation material $number times, the building energy-saving standards to further improve around the $number, the external wall insulation system thicker, more weight, the length of insulation anchor bolt longer, Anchor Bolts The construction level of the insulation system is higher.

External wall insulation system generally to paste mainly, mechanical fixed as a supplement. Adhesives using polymer-modified cementitious substrates are mechanically fastened using an insulated anchor bolt. At present, the product quality and price of adhesives are not homogeneous, the amount of unit area is also difficult to control, businesses to reduce the cost of polymer powder often reduce the amount of mortar and the use of the unit area; and the adhesive with the naked eye can not distinguish the quality of its advantages and disadvantages, Anchor Bolts therefore, thermal insulation anchor bolt Mechanical fixation role appears particularly important.

The insulation anchor Bolt is composed of expansion casing and expansion parts with disc, and the expansion casing material is generally polyamide, polyethylene or polypropylene plastic, and the expansion parts are more metal nails treated by galvanized. When used, insert a plastic casing into the hole, Anchor Bolts then tap or unscrew the metal screws. At the end of the expansion casing, the friction is generated by expansion extrusion in the borehole, and a certain mechanical locking effect is formed when the expansion end section is larger than the hole, and the shear force is produced on the expansion section when the tensile action is exerted. Anchor Bolts The friction and mechanical locking forces produced by different types of anchors are different in size. If the main force of the percussion anchor bolt is friction, the main force of the knot-type thermal insulation anchor is mechanical locking force.

The insulation anchor bolt is fixed in the base wall body, and when it is pulled, the expansion end of the bolt sleeve and the base material form the external friction force and the mechanical locking power. The plastic casing and the metal screws produce internal friction, and there is a tensile force on the casing. Anchor Bolts The various forces satisfy the following relations.

The size of the external friction is related to the friction coefficient of the contact surface, the sliding particle, the compressive strength of the base material, the pipe diameter and the total length of the expansion section. The greater the coefficient of friction, Anchor Bolts the more clean drilling, the greater the compressive strength of the base material, the larger the diameter of the tube, the longer the total length of the expansion section, the greater the external friction.

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