摘   要：复合了白云石与水渣用作混凝土掺合料，并经过了磨细处理研究了不同粒径及掺量的复合白云石掺合料对混凝土工作性能、气泡稳定性、塑性开裂及抗压强度的影响规律。结果表明，掺入的复合白云石掺合料掺量越大，混凝土含气量损失率越小，塑性开裂面积越小。掺入的复合白云石掺合料粒径越大，混凝土坍落度越大，含气量损失率越大，塑性开裂面积越大。对于C30混凝土，当复合白云石掺合料粒径10μm掺量20%时，对混凝土抗压强度的贡献最大。

Abstract: The effect of ground dolomite admixture with different particle size and content on the working performance, bubble stability, plastic cracking and compressive strength of concrete was studied by mixing the dolomite and water residue as concrete admixture. The results show that the larger the dolomite content is, the smaller the concrete gas loss rate is and the smaller the plastic cracking area is; the larger the particle size of the composite dolomite admixture is, the larger the concrete slump, the gas loss rate and the plastic cracking area are an. When the composite dolomite admixture particle size 10μm content is 20%, the concrete compressive strength of C30 concrete is the highest.