Concrete micro-foaming agent and preparation method thereof

The invention relates to a concrete micro-foaming agent which comprises the following components in parts by weight: 100-150 parts of sulfonating agent, 0 to 100 parts of an alkaline agent; 100 to 200 parts of a unilateral condensing agent; 200 to 400 parts of a cross-linking agent; and 250-600 parts of water. According to the present invention, the unilateral condensation reaction is performed with the unilateral condensing agent and other components to obtain the concrete micro-foaming agent of the small molecule polymer, and the concrete micro-foaming agent has characteristics of good bubble stability and small influence by concrete stirring time and storage time, and the workability, the fluidity and the construction performance of the concrete are greatly improved, and the water reducing rate and the cost performance are higher. 本发明涉及一种混凝土微沫剂，以重量份数计，混凝土微沫剂包括：磺化剂：100～150份；碱剂：0～100份；单边缩合剂：100～200份；扩联剂：200～400份；水：250～600份，本发明以单边缩合剂及其他组分进行单边缩合反应，以得到一类小分子聚合物的混凝土微沫剂，此外，本发明中的混凝土微沫剂具有气泡稳定性好、受混凝土搅拌时间和存放时间的影响小，且极大