Cast-in-place concrete fire-proof thermal insulation compound external formwork and use method thereof

Abstract

The invention relates to a cast-in-place concrete fire-proof thermal insulation compound external formwork and a use method thereof. A formwork body is provided with an internal protection layer, an internal binding layer, a compound thermal insulation layer, an external binding layer and an external protection layer from inward to outward in sequence; a trapezoid groove which is connected with aconcrete structure in a matched mode is formed in the inner side wall of the internal protection layer, and a coarse surface which is connected with the internal binding layer in a matched mode is arranged on the outer side wall of the internal protection layer; and the compound thermal insulation layer is formed by compounding a high wearing-resisting thermal insulation material and a high fire-proof thermal insulation material in an embedding and sleeving mode, the compound thermal insulation layer is arranged between the internal protection layer and the external protection layer, and coarse surfaces are arranged on the inner side wall and the outer side wall of the external protection layer. A phenomenon of crack and breakage of the peripheries of anchor holes is avoided, the thermal insulation layer has the properties of high strength, high fire resistance and high thermal insulation, the comprehensive performance is higher, the thermal insulation layer has the properties of fireproof and thermal insulation, the thermal insulation layer is not subjected to elastic deformation under the action of lateral pressure of concrete, high flatness of the fire-proof thermal insulationcompound external formwork after construction is ensured, and the binding intensity is high.

Description

technical field [0001] The invention relates to a cast-in-place concrete fireproof and thermal insulation composite external formwork and a method for using the same, and belongs to the technical field of energy-saving thermal insulation of building exterior walls and building cast-in-place concrete structural formwork. Background technique [0002] In the field of energy-saving and thermal insulation engineering of external walls of industrial and civil buildings, the external thermal insulation system of thin plastered external walls has always been dominant. There are cross operations, and the insulation material becomes a major hidden danger to fire safety during the construction process. Since the thin plaster external insulation system adopts the construction technology of sticking insulation boards on site, the project quality is uneven. During the construction period, the insulation boards are not firmly bonded. The accidents of falling off are often reported in the ...

AI Technical Summary

Problems solved by technology

[0003] Although prefabricated composite thermal insulation boards have many advantages, their popularization and application are limited due to various problems in this technical field. The existing problems are mainly manifested in three aspects. First, most of the protective layers of thermal insulation materials use cement plastering mortar. Because the strength and hardness of ordinary cement plastering mortar are not very high, when concrete is poured on site, under the action of concrete lateral pressure, the protective layer around the anchor hole will crack and fail; The material does not comprehensively consider the influence of various factors such as heat preservation, fire protection, and compression resistance. The performance of fire protection and heat preservation cannot be taken into account. Moreover, due to the low compressive strength of the heat preservation material and the large deformation under compression, the heat preservation material will recover after the concrete pouring support system is removed. Elastic deformation leads to large errors in the flatness of the outer side of the insulation board; finally, the adhesive between the insulation layer and the protective layer is bonded with pure organic adhesive or cement mortar, which cannot take into account the fire protection performance and bonding performance, and there are potential safety hazards. Therefore, we provide a cast-in-place concrete fireproof and thermal insulation composite external formwork and its application method

Images