济南自流平砂浆采用可再分散乳胶粉作为主要添加剂，可以提高产品性能；可再分散乳胶粉是影响自流平砂浆性能的重要添加剂，通过测试可再分散乳胶粉对石膏基自流平砂浆物理力学性能的影响，并通过微观分析揭示可再分散乳胶粉提高石膏基自流平砂浆力学性能的作用原理，说明可再分散乳胶粉在石膏基自流平的作用巨大。

Jinan self-leveling mortar uses redispersible latex powder as the main additive, which can improve product performance; Redispersible latex powder is an important additive that affects the performance of self leveling mortar. By testing the effect of redispersible latex powder on the physical and mechanical properties of gypsum based self leveling mortar, and through microscopic analysis, the mechanism of improving the mechanical properties of gypsum based self leveling mortar by redispersible latex powder is revealed, indicating the significant role of redispersible latex powder in gypsum based self leveling.

可再分散乳胶粉是一种应用广泛的有机粘结剂，应用于石膏基建材中可提高制品的性能。实验发现厚层石膏基自流平砂浆的初始流动度随着胶粉掺量增加先增大后减小，原因在于胶粉溶解水中具有一定的黏度，当掺量较低时，浆体黏度的提升提高了浆体对填料的悬浮能力，有利于浆体的流动；当胶粉掺量继续增加时，浆体黏度的提升导致浆体黏性增大，流动度呈现下降趋势。胶粉掺量对砂浆的20min流动度几乎没有影响.

Redispersible latex powder is a widely used organic binder that can improve the performance of gypsum based building materials. The experiment found that the initial fluidity of thick layer gypsum based self-leveling mortar first increases and then decreases with the increase of the amount of adhesive powder. The reason is that the adhesive powder has a certain viscosity in the dissolved water. When the amount is low, the increase in the viscosity of the slurry improves the suspension ability of the slurry to the filler, which is conducive to the flow of the slurry; When the amount of adhesive powder continues to increase, the increase in slurry viscosity leads to an increase in slurry viscosity and a decrease in flowability. The amount of adhesive powder has almost no effect on the 20 minute fluidity of mortar

胶粉作为一种有机粘结剂，强度的发展依赖于浆体水分的蒸发，成膜形成粘结强度，厚层石膏自流平砂浆浇筑24h后仍然具有较高的含水率，胶粉的强度没有得到发展，表现为石膏基自流平砂浆24h强度随着胶粉掺量增加呈现降低趋势。

As an organic binder, the development of adhesive powder strength depends on the evaporation of slurry moisture, forming a film to form adhesive strength. Thick layer gypsum self-leveling mortar still has a high water content after 24 hours of pouring, and the strength of adhesive powder has not been developed, manifested as the 24-hour strength of gypsum based self-leveling mortar shows a decreasing trend with the increase of adhesive powder content.

胶粉掺量为2.0%时，砂浆的24h抗折、抗压强度较未掺胶粉的分别下降25.5%和11.9%。绝干状态下石膏基自流平砂浆中水分蒸发，胶粉能形成连续膜，具有了较好的粘结力，表现为石膏基自流平砂浆的绝干强度随着胶粉掺量增加而提高，胶粉掺量为2.0%时，砂浆的绝干抗折、抗压强度较未掺胶粉的分别提高了63.5%36.8%。

When the amount of rubber powder added is 2.0%, the 24-hour flexural and compressive strength of the mortar decreases by 25.5% and 11.9%, respectively, compared to the mortar without rubber powder added. In the dry state, the moisture in the gypsum based self-leveling mortar evaporates, and the adhesive powder can form a continuous film, which has good adhesion. This is manifested by the increase in the dry strength of the gypsum based self-leveling mortar with the addition of adhesive powder. When the amount of adhesive powder is 2.0%, the dry bending and compressive strength of the mortar are 63.5% and 36.8% higher than those without the addition of adhesive powder, respectively.

未掺加胶粉的石膏基自流平砂浆中有大量棒状、柱状二水石膏晶体和不规则填料二水石膏晶体之间以及二水石膏晶体与填料之间交错搭接在一起，通过不规则紧密堆积在一起使石膏基自流平砂浆产生强度。

There are a large number of rod-shaped and columnar dihydrate gypsum crystals and irregular fillers in gypsum based self-leveling mortar without adding adhesive powder. The dihydrate gypsum crystals and fillers are staggered and overlapped together, and the gypsum based self-leveling mortar generates strength through irregular and tight stacking.

掺入2.0%可再分散乳胶粉的石膏基自流平砂浆中，胶粉在石膏基自流平砂浆中形成丝状连接，在二水石膏晶体与填料，晶体与晶体之间形成有机架桥，二水石膏晶体上形成有机膜，将二水石膏晶体之间的搭接部位包裹和连接，从而增加了石膏基自流平砂浆的内聚力和粘结力，提高了石膏基自流平砂浆的强度胶粉在砂浆中具有成膜性，能提高干燥砂浆的内聚力和粘结强度。

In a gypsum based self-leveling mortar mixed with 2.0% redispersible latex powder, the adhesive powder forms a filamentous connection in the gypsum based self-leveling mortar, forming an organic bridge between the dihydrate gypsum crystal and the filler, and between the crystal and the crystal. An organic film is formed on the dihydrate gypsum crystal, wrapping and connecting the overlapping parts between the dihydrate gypsum crystals, thereby increasing the cohesion and bonding force of the gypsum based self-leveling mortar, The strength of gypsum based self-leveling mortar has been improved, and the adhesive powder has film-forming properties in the mortar, which can improve the cohesion and bonding strength of dry mortar.

胶粉在二水石膏晶体与填料间的成膜物对二水石膏晶体之间以及填料间形成有效粘结，提高了二水石膏晶体与填料间的内聚力，从而在宏观上提高了石膏基自流平砂浆的粘结强度。胶粉掺量2.0%时，砂浆的粘结强度较未掺胶粉的提高了46.5%。还有什么事项就来我们网站//www.gochiism.com咨询！

The film formed by the adhesive powder between the dihydrate gypsum crystal and the filler forms effective bonding between the dihydrate gypsum crystal and the filler, improving the cohesion between the dihydrate gypsum crystal and the filler, thereby improving the bonding strength of the gypsum based self-leveling mortar at a macro level. When the amount of adhesive powder is 2.0%, the bonding strength of the mortar is 46.5% higher than that of the mortar without adhesive powder. If there are any other matters, please come to our website //www.gochiism.com consulting service