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铝酸钙膨胀剂(简称AEA)是一种硫铝酸钙型混凝土膨胀剂,在制备混凝土时掺入水泥重量的8～12%,代替相同重量的水泥,制成补偿收缩混凝土.其特点是膨胀稳定快,膨胀能量大,后期强度高,干缩小.能防止混凝土建筑物的开裂,提高抗渗防水性能.普通混凝土的收缩开裂时有发生,导致渗漏,钢筋锈蚀,影响结构的使用功能和寿命.为此,国内外工程界在材料,设计和施工技术等方面进行了许多研究.工程实践证明:采用膨胀剂或膨胀水泥制成的膨胀混凝土,取代普通混凝土是较理想的建筑结构材料,将结构承重与结构自防水合二为一,具有优良的自防水性能.
Calcium aluminate expander (abbreviated as AEA) is a kind of calcium sulphoaluminate concrete expansion agent. It is mixed with 8-12% of cement weight in the preparation of concrete. Instead of the same weight of cement, it is made into compensated shrinkage concrete. Its characteristics are: The expansion is stable and fast, the expansion energy is large, the late strength is high, and the dryness is reduced. This can prevent the cracking of concrete buildings and improve the impermeability waterproof performance. The shrinkage and cracking of ordinary concrete occurs at times, leading to leakage, steel corrosion, and affecting the use of the structure And life. To this end, the domestic and foreign engineering circles have conducted many researches in materials, design and construction techniques. The engineering practice has proved that the use of expansive or expansive cement made of expansive concrete is an ideal alternative to ordinary concrete. , The structural load-bearing and structural self-waterproof combination, with excellent self-water resistance.