MgO复合生态纤维混凝土早期力学性能实验研究

通过混凝土的正交试验,研究了水胶比、粉煤灰取代率、氧化镁掺量、砂率、复合生态纤维体积掺量对于混凝土28 d抗压强度、28 d劈裂抗拉强度的影响,并确定混凝土的最优配合比。试验结果表明:氧化镁的掺入会严重降低混凝土的抗压强度,劈裂抗拉强度也有所降低,当氧化镁和复合生态纤维复掺时混凝土早期力学性能的下降趋势有所改善,并达到C50混凝土强度要求。

Early Mechanical Properties of MgO Synthetic Ecologic Fiber Concrete Experimental Study

Studied by the orthogonal experiment of con-crete, water-binder ratio, fly ash replacement ratio, magnesi-um oxide, sand ratio, dosage of compound ecological fiber vol-ume content of concrete 28 d compressive strength, splitting ten-sile strength of 28 d, and the optimal mixing proportion of con-crete were determined. The results showed that the magnesium oxide doped will seriously reduce the compressive strength of concrete, tensile splitting strength, too, fell, when the magne-sium oxide and compound ecosystem of fiber mixed concrete, early decline improved mechanical properties and meet the re-quirements of C50 concrete strength.