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Anchor Bolts Higher Requirements
Nov 03, 2017

At the beginning of the development of building exterior insulation products, due to the low energy efficiency standards and the use of organic thermal insulation materials with better thermal conductivity, Anchor Bolts such as EPS, XPS, Polyurethane board (PUR), the thickness of the general 3 ~ 5cm, lightweight insulation material, insulation anchor length is generally not more than 10cm, external insulation system is still rare events. Anchor Bolts With the policy adjustment and intense market competition, high-rise buildings began to extensive use of rock wool, foam cement board and other inorganic insulation materials. Inorganic thermal insulation material itself thermal conductivity, to achieve the same insulation effect requires thicker material, Anchor Bolts and the apparent density of organic insulation material is 5 to 20 times, around the building energy efficiency standards to further improve to 65% to 75%, the external wall insulation Thicker system thickness, heavier weight, longer length of the insulation anchor bolt, the insulation level of the construction system requires a higher.

External insulation system generally paste the main fixed, Anchor Bolts supplemented by machinery. Paste the use of polymer-modified cement-based adhesives, mechanical fixing is the use of insulation anchor. At present, the adhesive product quality and price of the first time missing, Anchor Bolts the amount per unit area is difficult to control, businesses tend to reduce the cost of reducing the amount of polymer powder and mortar dosage per unit area; and adhesive with the naked eye can not tell the quality of excellent Poor, Anchor Bolts therefore, insulation anchor bolt mechanical fixation is particularly important.

Insulation anchor by the expansion disc with a disc and expansion components, expansion casing material is generally polyamide, polyethylene or polypropylene plastic, expansion pieces are mostly galvanized metal nails. When used, place a plastic sleeve in the hole and tap or screw in a metal screw. The end of the expansion sleeve expands and crushes in the drill hole to generate friction force. When the expansion end section is larger than the hole, Anchor Bolts a certain mechanical locking effect is also formed, Anchor Bolts and the shear force is generated on the expansion section by the pulling force. Different types of anchor the friction and mechanical locking force generated by the different sizes. Such as percussion anchor the main force is friction, Anchor Bolts and knot-type insulation anchor the main force is the mechanical locking force.

Insulation anchor bolt is fixed in the base wall, when it is subjected to tension, the expansion end of the anchor bolt casing and the base material to form external friction and mechanical locking force. The plastic sleeve and the metal screw generate internal friction and there is a pulling force on the sleeve. Between the various forces to meet the following relationship.

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