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Anchor Bolts Requires Higher
Jun 15, 2017

Building exterior insulation products at the beginning of the development, due to lower energy efficiency standards, and the use of better thermal conductivity of organic insulation materials, such as molded polystyrene board (EPS), extruded polystyrene board (XPS), Anchor Bolts hard foam Polyurethane plate (PUR), etc., the thickness of the general 3 ~ 5cm, insulation material weight lighter, insulation bolt length is generally not more than 10cm, external wall insulation system is still rare from the event. With the policy adjustment and intense competition in the market, high-rise buildings began to use a large number of rock wool, Anchor Bolts foam cement board and other inorganic insulation materials. Inorganic thermal insulation material itself thermal conductivity, to achieve the same insulation effect requires thicker material, and the apparent density is also organic insulation materials 5 to 20 times, around the building energy efficiency standards further increased to 65% to 75%, the external wall insulation The thickness of the system is thicker, the weight is bigger, the length of the insulation anchor is longer, and the construction level of the insulation system is higher.

External wall insulation system is generally the main paste, mechanical fixed as a supplement. Paste the use of polymer modified cement-based adhesive, mechanical fixation is the use of insulation anchor. At present, the adhesive product quality and price uneven, the unit area is also difficult to control the amount of business to reduce costs often reduce the amount of polymer powder and mortar use per unit area; and the adhesive can not distinguish its excellent quality with the naked eye Therefore, the mechanical fixation of insulation bolts is particularly important.

Insulation anchor by the expansion of the disc with the casing and expansion components, expansion casing material is generally polyamide, polyethylene or polypropylene plastic, Anchor Bolts the expansion of the pieces are mostly galvanized metal nails. When used, first insert the plastic sleeve into the borehole, then tap or screw the metal screw. The expansion sleeve end in the drilling expansion and compression to produce friction; expansion end section is greater than the hole, but also the formation of a certain mechanical locking effect, Anchor Bolts by the role of tensile force in the expansion of the shear force. Different types of anchors have different frictional and mechanical locking forces. If the main force of the percussion anchor is the friction force, and the main force of the knotting insulation anchor is the mechanical locking force.

Insulation anchor bolt fixed in the grass-roots wall, Anchor Bolts when it is tension, the anchor bolt expansion end and the base material to form external friction and mechanical locking force. Plastic sleeves and metal screws produce internal friction, the sleeve has a tension. The following relationships are satisfied between the various forces.

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