摘   要：通过测试掺用再生微粉浆体的化学结合水、水化热和抗压强度，研究了再生微粉掺量及不同强度废弃混凝土制备的再生微粉对水泥水化性能的影响。结果表明，再生微粉对浆体化学结合水和抗压强度的影响趋势相近；随着再生微粉掺量的增加，浆体化学结合水越来越小，掺用强度高的废弃混凝土制备的再生微粉浆体各龄期化学结合水均明显高于强度较低的废弃混凝土制备的再生微粉浆体；掺用再生微粉降低了浆体最大放热量，且随着掺量的增加，延缓了其达到最大放热量的时间，掺用高强度废弃混凝土制备的再生微粉的浆体最大放热量大于掺用强度较低废弃混凝土制备的再生微粉浆体，但对浆体达到最大放热量的时间影响不大。

Abstract: The effects of the recycled powder content and recycled powder prepared by waste concrete with the different strengths on the hydration characteristics of cement pastes are studied by testing the chemically combined water, compressive strengths and hydration heat. The results indicate that the effect of recycled powder on compressive strength of pastes is similar with that on chemically combined water; chemically combined water of pastes decreases with the increase of the recycled powder content; chemically combined water of pastes with recycled powder prepared by the higher strengths waste concrete at the corresponding ages is greater than that of pastes with recycled powder prepared by the lower strengths waste concrete; recycled powder decreases the maximum hydration heat, and the exothermic time of the maximum hydration heat is delayed with the increase of the recycled powder content; the maximum hydration heat of pastes with recycled powder prepared by the higher strengths waste concrete is greater than that of pastes with recycled powder prepared by the lower strengths waste concrete, but the effects of two kinds of recycled powder on the exothermic time of the maximum hydration heat are little.