一、前言砂浆微沫剂是以松香为主要原料,经以松香皂化为主的一系列化学反应加工而成的一种引气憎水性表面活性剂。这种引气剂在砂浆中能产生数以万计的微小的稳定气泡,由于其“滚珠效应”,从而可以改善砂浆的和易性、可塑性和保水性,并节约石灰。从50年代起,我国就开始研究使用微沫剂,当时微沫剂的主要成分是松香酸钠和骨胶,起泡率低,强度增长幅度小。80年代人们研制了改性新产品——RSF—改性微沫剂。本研究以磺酸盐取代传统微沫剂中的骨胶,合成了一种新型微沫剂(文中称w—微沫剂),并试验研究了它的起泡率,气泡稳定性,以及对水泥砂浆物理力学性能的影响,初步探讨了磺酸盐的作用机理。另外,为了进一步 I. INTRODUCTION The mortar micro-foam agent is an air-entraining hydrophobic surfactant made of rosin as the main raw material and processed by a series of chemical reactions mainly based on rosin saponification. This air-entraining agent can generate tens of thousands of tiny stable bubbles in the mortar. Due to its “ball effect”, it can improve the workability, plasticity, and water retention of the mortar and save lime. Since the 1950s, China began to study the use of micro-foam agents, the main component of the micro-foam agent was sodium rosinate and bone glue, low foaming rate, a small increase in strength. In the 1980s, people developed a modified new product - RSF - modified micro-foam. In this study, sulfonates were used to replace the bone glues in traditional micro-foams, and a new type of micro-foam agent (in this article, called w-micro-foam agent) was synthesized. The foaming rate, bubble stability, and cement were experimentally studied. Influence of the physical and mechanical properties of the mortar, the mechanism of action of the sulfonate salt was initially discussed. In addition, in order to further