高掺量粉煤灰自流平砂浆性能的研究

本试验的自流平砂浆中粉煤灰含量高达 30 % ,并将高效减水剂、引气减水剂、增稠剂、膨胀剂复合掺用 ,研究表明 ,配制的水泥基自流平砂浆具有扩展度大、扩展度经时损失小的特性。扩展度达 2 4 5mm ,砂浆抗压强度39MPa,抗折强度 6 7MPa,同时 ,具有早期强度高、收缩小的特征。高掺量优质粉煤灰的掺入 ,不仅增加了砂浆的流动性 ,而且大大降低了成本 ,达到了技术和经济的双重效果。

RSEARCH ON THE PERFORMANCE OF SELF-LEVELING MORTAR WITH HIGH CONTENT OF FLY ASH

In the research,fly ash content of self-leveling mortar accounts for 30 percent of cement.Cement-based self-leveling mortar,which compound super plasticizer,water-reducing and air-entrained admixture,thickener and expansive agent,it indicates that it has the performance of great extensibility and little losing afterwards.Self-leveling mortar fluidity is 245 mm,compressive strength is 39 MPa,flexural strength is 6.7 MPa,Meanwhile,it has the characteristics of high early strength and little shrinkage.Self-leveling mortar mixed high content of perfect fly ash increases its fluidity,decrease its costs heavily and attains double effect in technology and economy.