矿物掺合料对混凝土物理力学性能的影响

Effects of Mineral Admixtures on Physical and Mechanical Properties of Concrete

本文研究了不同矿物掺合料对混凝土工作性与力学性能的影响。结果表明:粉煤灰的掺入可以节约混凝土中水泥的用量、改善其和易性,但同时也使混凝土的早期强度降低;矿粉能使混凝土的早期强度得到提高,但却极大降低了其流动性;双掺粉煤灰/矿渣混凝土中矿物掺合料的掺量存在一个最佳掺量,其原因可能是当掺量为30%时,密实填充效应达到最大,所以强度较高。

In this paper, the effect of different mineral admixture on the workability and compressive strength of concrete was investigated. As is shown in the results, the addition of fly ash can save the amount of cement and improve the workability of concrete, but also reduce the early strength of concrete. Slag can improve the early strength of concrete, but greatly reduce its fluidity. There is an optimal content of mineral admixture in the concrete with double mix of fly ash/slag. The reason can be attributed to that when the content is 30%, the dense filling effect reaches the maximum and the strength is high.