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为了研究粉煤灰和矿渣对混凝土强度的影响,通过控制矿物掺合料的掺量,经过强度试验得到在单掺粉煤灰或矿渣以及按1∶1比例复掺3种状况下混凝土的抗折强度和立方体抗压强度的变化规律。试验结果表明:加入掺合料的混凝土早期强度均比基准混凝土的强度低;粉煤灰和矿渣复掺时,二者的“叠加反应”促使混凝土的后期强度增长较快;单掺粉煤灰的早期抗折强度整体较高。
In order to study the effect of fly ash and slag on the strength of concrete, by controlling the amount of mineral admixtures, the strength of the concrete was tested by the strength test with single-blended fly ash or slag and three kinds of conditions mixed in a 1:1 ratio. Fold strength and cube compressive strength change law. The test results show that the early strength of concrete added with admixtures is lower than that of the reference concrete; when the fly ash and slag are remixed, the “superimposed reaction” of the two promotes the rapid increase of the late strength of the concrete; The early fracture strength of coal ash is relatively high.