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外墙保温系统脱落的原因分析
来源: 日期:2018-09-12 发布人:admin

建筑外墙保温系统是一种复合的构造层,出现脱落现象一般在不同构造层交界处,如粘结层与基层之间、保温层与粘结层之间、抹面层与保温层之间,常见的脱落现象主要出现在保温板脱落和抹面层脱落两种,但是引起外墙保温系统脱落的原因主要有以下几方面:

Exterior wall insulation system is a kind of composite structure layer. Shedding phenomena usually occur at the junction of different structure layers, such as bonding layer and base layer, insulation layer and bonding layer, plastering layer and insulation layer. The common shedding phenomena mainly occur in two kinds of insulation board shedding and plastering layer shedding, but cause the external wall protection. The main reasons for the falling of temperature system are as follows:

在建筑外墙保温系统脱落质量问题里面,因为胶粘剂因素引起的保温脱落问题最为常见。

In the quality problem of building exterior wall insulation system shedding, because of adhesive factors caused by the shedding problem is the most common.

A级防火保温材料

(1)胶粘剂质量太差:墙体保温系统保温材料多数是高分子泡沫板,为保证保温材料与基层墙体的粘贴,采用的是一种添加了聚合物乳液或可分散胶粉的聚合物砂浆。胶粘剂中聚合物含量,会影响胶粘剂的粘结性、耐水性等,但是成本较高,国内市场某些企业会降低聚合物的用量,以牺牲质量来换取低成本,这样直接导致胶粘剂性能达不到标准规定的0.1MPa要求。

(1) the quality of adhesives is too poor: most of the insulation materials for wall insulation systems are polymer foam panels. In order to ensure the paste of thermal insulation materials and basic walls, polymer mortar with polymer emulsion or dispersible rubber powder is used. The content of polymer in the adhesive will affect the adhesion and water resistance of the adhesive, but the cost is high. Some enterprises in the domestic market will reduce the amount of polymer and sacrifice the quality for low cost. This will directly lead to the performance of the adhesive can not meet the 0.1 MPa requirements of the standard.

(2)布胶方式不正确或布胶量不够,导致保温板粘贴面积过小:胶粘剂粘贴保温板是保温系统固定的主要方式,保温板粘结面积直接影响保温系统的粘结牢固度。

(2) The improper way or insufficient amount of adhesive lead to the small adhesive area of the insulation board: adhesive is the main way to fix the insulation system, and the adhesive area of the insulation board directly affects the bond strength of the insulation system.

(3)施工因素或基墙原因,导致保温板虚贴。因为施工工人操作原因或者墙面平整度偏差过大,造成保温板出现虚贴现象,其次涂布方式不正确也容易导致虚贴现象。

(3) construction factor or base wall cause the insulation board to be pasted. Because of the operation of construction workers or wall smoothness deviation is too large, resulting in the phenomenon of false paste insulation board, followed by improper coating method is also easy to lead to false paste phenomenon.


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