固硫灰对水泥基自流平砂浆水化产物和性能的影响

Influences of Fluidized Bed Combustion Fly Ash (FBCFA) on Hydration Products and Properties of Cement-based Self-leveling Mortar (CLSM)

研究了固硫灰细度和掺量对水泥基自流平砂浆性能的影响。研究发现固硫灰细度越细，砂浆1d、3d、28d抗折和抗压强度越高，收缩则先减小后增大。掺加粉磨后固硫灰砂浆的收缩均较掺原灰砂浆的收缩小。随着固硫灰掺量增大，水泥基自流平砂浆的1d和3d强度先增大后减小，28d强度呈减小趋势，收缩随着固硫灰掺量增大而减小。固硫灰取代硅酸盐水泥的40％-60％时，砂浆的强度和收缩性较好，取代率为50％时性能最佳。

The influence of fineness and dosage of fluidized bed combustion fly ash （FBCFA） to the properties of cement-based self-leveling mortar （CLSM） is researched. The results show that with the decrease of the partieal size of FBCFA, the flexural and compressive strength of 1d, 3d and 28d increase while the shrinkage of the CSLM firstly decreases and then increases. The shrinkage of CSLM with grinding FBCFA is less than the ones of CSLM with original FBCFA. With the increase of dosage of FBCFA,the flexural and compressive strength of ld and 3d firstly increase and then decrease while the flexural and compressive strength of 28d decrease, and the shrinkage decreases with the increase of FBCFA. When the FBCFA replaces portland cement by 40%-60%, the strength and shrinkage are well, and the CSLM properties are best at the ratio of 50%.