随着我国建筑业的腾飞，大量建筑的改、扩建活动也迅猛发展，由此产生的建筑垃圾，造成了环境的污染、生态的破坏、资源的浪费。因此将废旧建筑材料重新加以循环利用，可缓解资源与环境压力，也符合绿色建筑的节材要求，具有重大研究意义，是未来绿色建筑发展的必然趋势。 本文以废旧建筑材料为研究对象，对其再生骨料的循环利用进行了深入的探讨和研究。通过实验测定再生骨料的表观密度、吸水率、压碎指标等各项物理力学性能指标，并与天然骨料进行对比分析，结果表明，再生骨料的各项指标均能满足混凝土粗骨料配置要求。 为了分析再生骨料掺入量对混凝土强度的影响，本文选取了三种不同强度的混凝土，对其掺入不同比例的再生骨料进行立方体抗压、劈裂抗拉、抗折强度试验研究，试验结果显示：随着再生骨料取代率的增加，混凝土的立方体抗压强度整体呈下降趋势；劈裂抗拉强度整体呈上升趋势；抗折强度变化较小。为进一步研究再生混凝土的变形性能，本文研究设计了应力-应变曲线试验方案，分析试验结果得到：随着再生骨料取代率的增加，其峰值应力和峰值应变减小，弹性模量降低。 为了进一步改善再生混凝土的力学性能，本文选取在工程实际中广泛应用的C30混凝土为研究对象，对其掺入不同体积率的剪切型钢纤维进行立方体抗压、劈裂抗拉、抗折强度以及应力—应变曲线试验研究，研究证明：其土立方体抗压、劈裂抗拉、抗折强度均随钢纤维掺入量的增加而提高；应力-应变曲线试验显示随着钢纤维掺入量的增加，其峰值应力和峰值应变增大，弹性模量提高。 综上所述：废旧建筑材料可以再次循环利用，且对各种再生骨料掺量的混凝土降低一个标号等级后能够满足强度、变形要求，而对再生混凝土掺入钢纤维后其强度、变形性均能得到显著提高，能够达到强度、变形要求，可以在工程中推广应用。

Along with the rapid development of construction industry, a large number of buildings to also rapid development and expansion of activity, the resulting construction waste, causing environmental pollution, ecological destruction and the waste of resources. So will waste building materials to be recycled, can reduce the pressure on resources and environment, and conform to the requirements of the green building materials, has the research significance, is the inevitable trend of the green building development. Waste building materials as the research object in this paper, the recycling of recycled aggregates has carried on the deep discussion and research. Regeneration aggregate can be determined through the experiment of apparent density, water absorption and crushing index such as the physical and mechanical performance index, and compared with natural aggregate analysis, the results show that the recycled aggregates all the indexes can meet the requirements of coarse aggregate of concrete configuration. In order to analyses the influence of recycled aggregate mortar for concrete strength, the article analyzes three different strength of concrete, the mixed with different proportions of recycled aggregates were cube compressive strength, splitting tensile strength, bending strength test research, experimental results show that with the increase of recycled aggregates, the cube compressive strength of concrete as a whole is on the decline; Splitting tensile strength as a whole is on the rise; Smaller flexural strength changes. In order to further study the deformation behavior of recycled concrete, the stress-strain curve experiment was designed in this paper, we study plan, analyzing the test results are: with the increase of recycled aggregates, the peak stress and peak strain decreases, and the elastic modulus decreases. In order to further improve the mechanical properties of recycled concrete, this article selects is widely used in engineering practice of C30 concrete as the research object, the shear steel fibers mixed with different volume fraction of cube compressive strength, splitting tensile strength, bending strength and the experimental study on the stress - strain curve, studies have shown that: the soil cube compressive strength, splitting tensile strength, bending strength increased with the increase of the steel fiber reinforced mortar; Stress-strain curve test show that with the increase of steel fiber reinforced mortar, the peak stress and peak strain, elastic modulus increase. Above all: waste building materials can be recycled again, and the dosage of various kinds of recycled aggregate concrete decreases a label after grade can meet the requirements of strength, deformation, and the recycled concrete with steel fiber after its strength and deformation can get improved significantly, can meet the requirements of strength, deformation, can be applied in engineering practice.