聚丙烯纤维对水泥基泡沫材料性能影响

Influence of Polypropylene Fiber on the Properties of Cement-based Material

利用快硬硫铝酸盐水泥和引气剂、减水剂、稳泡剂以及短切聚丙烯纤维制备水泥基泡沫材料,研究了聚丙烯纤维掺量对材料表观密度、抗压强度、孔隙率以及孔结构和压折比的影响。结果表明,表观密度随纤维掺量增加而线性增大,当纤维掺量由0增加至0.25%时,表观密度增大了26.7%。对于抗压强度存在最佳纤维掺量,当掺量为0.15%时,抗压强度达到最大值。纤维掺量增加有利于材料韧性提高,但不利于封闭孔隙的形成,当纤维掺量由0.2%增大至0.25%时,压折比降低了14.4%,"体积吸水率与孔隙率比"增大了59.2%。

Cement-based foam materials were prepared by using rapid-hardening sulphate aluminate cement, foaming agent, plasticizer, foam-stabilizer and short polypropylene fiber. Under different fraction of polypropylene fiber, the properties of apparent density, compress strength, porosity, pore structure and the ratio of compressive strength to flexural strength were studied. The results show that the porosity of foam material increases 26.7% when fiber mass fraction increases from 0 to 0.25% and the optimal value of fiber mass fraction is 0. 15% for achieving the maximum of compress strength. Additionally, test results show that the increase of fiber mass fraction can increase the pore connectivity, but help to improve the toughness of material.