摘   要：研究了应变率（1×10-5、1×10-4、1×10-3、2×10-3 s-1）、铅锌尾矿砂掺量（0、10%、20%、30%、40%、50%）对混凝土抗压强度、峰值应变和泊松比的影响。结果表明：随着铅锌尾矿砂掺量的增加，混凝土试件抗压强度先增后降；当铅锌尾矿砂掺量一定时，随着应变率的增大，混凝土的轴心抗压强度平均值增大，峰值应变平均值减小，泊松比变化较小；当应变率一定时，随着铅锌尾矿砂掺量的增加，混凝土的轴心抗压强度平均值先增后降，峰值应变平均值降低，泊松比变化较小；不同铅锌尾矿砂掺量混凝土的抗压强度增量系数和峰值应变增量系数与动态、准静态应变率比值的对数均呈线性相关关系，且相关性较好。 Abstract: The effects of strain rate (1×10-5, 1×10-4, 1×10-3, 2×10-3 s-1), and the content(0, 10%, 20%, 30%, 40%, 50%) of lead-zinc tailings sand on the compressive strength, peak strain and poisson’s ratio of concrete were investigated. The results show that, with the increase of the content of lead-zinc tailings sand, the compressive strength of concrete specimen first increases and then decreases. When the content of lead-zinc tailings sand is constant, with the increase of strain rate, the average value of  axial compressive strength of concrete increases, the average value of peak strain decreases, and the poisson’s ratio varies slightly. When the strain rate is constant, with the increase of the content of lead-zinc tailings sand, the average value of axial compressive strength of concrete first increases and then decreases, the average value of peak strain decreases, and the poisson’s ratio varies slightly. The incremental coefficient of compressive strength and the peak strain of concrete with different content of lead-zinc tailings sand are linearly correlated with the logarithms of the ratio of dynamic and quasi-static strain rates, and the correlations are favorable.

杨博,甘元初,金丹.不同应变率下铅锌尾矿砂混凝土单轴受压力学性能研究[J].混凝土与水泥制品,2025(2):82-86. YANG B,GAN Y C,JIN D.Study on uniaxial compressive mechanical properties of concrete with lead-zinc tailings sand subjected to different strain rate[J].China Concrete and Cement Products,2025(2):82-86.

摘   要：研究了花岗岩机制砂、机制碎石对不同设计强度等级（C20、C30、C40、C50）混凝土凝结时间、抗压强度、劈裂抗拉强度和抗折强度的影响。结果表明：相较于天然骨料组试件，不论混凝土的设计强度等级多大，机制碎石、机制砂单一取代或同时取代天然骨料均降低了混凝土的凝结时间、28 d抗压强度、28 d劈裂抗拉强度和28 d抗折强度，其中，机制碎石单一取代天然碎石对混凝土力学性能的削弱作用基本最小，机制砂单一取代河砂次之，机制碎石、机制砂同时取代天然骨料对混凝土力学性能的削弱作用最大；混凝土的设计强度等级越高，由机制骨料取代天然骨料导致的混凝土力学性能损失基本越小。 Abstract: The effects of granite manufactured sand and stone on setting time, compressive strength, splitting tensile strength and flexural strength of concrete with different design strength grades were investigated. The results show that, compared with the natural aggregates group specimens, regardless of the design strength grade of concrete, the single replacement or simultaneous replacement of natural aggregates by manufactured aggregates reduces the setting time, 28 d compressive strength, 28 d splitting tensile strength and 28 d flexural strength of concrete. Among which, the single replacement of natural stone by manufactured stone has the smallest weakening effect on the mechanical properties of concrete, followed by the single replacement of river sand by manufactured sand, and the simultaneous replacement of natural aggregates by manufactured stone and sand has the largest weakening effect on the mechanical properties of concrete. The higher the design strength grade of concrete, the basically smaller the loss of mechanical properties of the concrete resulting from the replacement of natural aggregates by manufactured aggregates.

郭志超.机制砂、石对混凝土性能的影响[J].混凝土与水泥制品,2025(2):87-90,96. GUO Z C.Effect of manufactured sand and stone on the performance of concrete[J].China Concrete and Cement Products,2025(2):87-90,96.

摘   要：研究了活化方式（机械活化、碱活化）对铜尾矿粉活性的影响，在此基础上研究了活化铜尾矿粉、低品位硅粉的掺量（0、3%、6%、9%）对混凝土工作性、力学性能和耐久性能的影响。结果表明：相较于碱活化，机械活化对铜尾矿粉活性的改善效果更好，最佳粉磨时间为40 min；随着活化铜尾矿粉掺量的增加，混凝土的工作性、抗压强度、干燥收缩性能基本降低，抗氯离子渗透性能和抗冻性能先增后降，活化铜尾矿粉的最佳掺量为6%；随着低品位硅粉掺量的增加，混凝土的工作性、60~90 d抗压强度、抗氯离子渗透性能和抗冻性能均先增后降，3~28 d抗压强度增大，干燥收缩性能降低，低品位硅粉的最佳掺量为6%。 Abstract: The effect of activation method(mechanical activation,  alkali activation) on the activity of copper tailings powder was investigated, and based on this, the effects of the content(0, 3%, 6% and 9%) of activated copper tailings powder and low grade silica fume on the workability, mechanical property, and durability of concrete were investigated. The results show that, compared with alkali activation, mechanical activation is more effective in improving the activity of copper tailings powder, and the optimal grinding time is 40 min. With the increase of the content of activated copper tailings powder, the workability, compressive strength and drying shrinkage performance of the concrete basically decrease, and the chlorine ion penetration resistance and frost resistance first increase and then decrease, and the optimum content of activated copper tailings powder is 6%. With the increase of the content of low grade silica fume, the workability, 60~90 d compressive strength, chlorine ion penetration resistance and frost resistance of concrete first increase and then decrease, the 3~28 d compressive strength increases, the drying shrinkage performance decreases, and the optimum content of low grade silica fume is 6%.

卢霄,李宁,史平,等.铜尾矿粉和低品位硅粉对混凝土性能的影响[J].混凝土与水泥制品,2025(2):91-96. LU X,LI N,SHI P,et al.Effects of copper tailings powder and low grade silica fume on performance of concrete[J].China Concrete and Cement Products,2025(2):91-96.

摘   要：研究了矿物掺合料种类[石灰岩石粉（SH）、花岗岩石粉（HG）、钢渣粉（GZ）、粉煤灰（FA）]对花岗岩机制砂预拌砂浆孔结构、稠度、稠度损失、保水性、表观密度、抗压强度、干燥收缩和吸水率的影响。结果表明：28 d时，砂浆孔隙率的大小顺序为：FA组＜GZ组＜SH组＜HG组；砂浆稠度的大小顺序为：FA组＞SH组＞GZ组＞HG组，稠度损失的大小顺序为：HG组＞GZ组＞SH组＞FA组，保水性的大小顺序为：HG组＞FA组＞SH组＞GZ组，表观密度的大小顺序为：GZ组＞HG组＞SH组＞FA组；28 d时，砂浆抗压强度的大小顺序为：GZ组≈FA组＞SH组＞HG组，砂浆干燥收缩值的大小顺序为：FA组＜GZ组＜SH组＜HG组，砂浆吸水率的大小顺序为：FA组＜SH组＜GZ组＜HG组。 Abstract: The effects of the types of supplementary cementitious materials[limestone powder(SH), granite stone powder(HG), steel slag powder (GZ), and fly ash(FA)] on the pore structure, consistency, loss of consistency, water retention, apparent density, compressive strength, drying shrinkage, and water absorption of ready-mixed mortar with granite manufactured sand were studied. The results show that, at 28 d, the order of porosity of mortar is as follows: FA group < GZ group < SH group < HG group. The order of the consistency of the mortar is as follows: FA group＞SH group＞GZ group＞HG group, the order of the loss of consistency is as follows: HG group＞GZ group＞SH group＞FA group, the order of water retention is as follows: HG group＞FA group＞SH group＞GZ group, the order of the apparent density is as follows: GZ group＞HG group＞SH group＞FA group. At 28 d, the order of compressive strength of mortar is as follows: GZ group≈FA group＞SH group＞HG group, the order of drying shrinkage value of mortar is as follows: FA group＜GZ group＜SH group＜HG group, the order of water absorption of mortar is as follows: FA group＜SH group＜GZ group＜HG group.

陈健,黄波,代柱端,等.矿物掺合料种类对机制砂预拌砂浆性能的影响[J].混凝土与水泥制品,2025(2):97-100. CHEN J,HUANG B, DAI Z D,et al.Effect of the type of supplementary cementitious materials on performance of ready-mixed mortar with manufactured sand[J].China Concrete and Cement Products,2025(2):97-100.

摘   要：研究了预处理方式（颗粒整形、水泥浆浸泡、碳化处理）对再生砂压碎指标、孔结构及胶砂需水量、力学性能、吸水性、干燥收缩性能和孔结构的影响。结果表明：颗粒整形对再生砂抗压碎性能和孔结构的改善效果最好；相比于掺未处理再生砂的胶砂，掺颗粒整形再生砂胶砂的需水量降低了23.86%，28 d抗压强度、抗折强度分别提高了77.97%、50.00%，吸水量降低了1.55%，干燥收缩值降低了6.46%，孔隙率降低了58.52%。 Abstract: The effects of pretreatment methods(particle shaping, cement slurry soaking and carbonation treatment) on the crushing index, pore structure of recycled sand, as well as the water demand, mechanical properties, water absorption, drying shrinkage performance and pore structure of cement mortar were investigated. The results show that particle shaping has relatively the best effect on the improvement of crushing resistance and pore structure of recycled sand. Compared with the cement mortar with untreated recycled sand, the water demand of the cement mortar with recycled sand after particle shaping decreases by 23.86%, the 28 d compressive strength and flexural strength increase by 77.97% and 50.00%, respectively, the water absorption decreases by 1.55%, the drying shrinkage value decreases by 6.46%, and the porosity decreases by 58.52%.

程欢,何政,刘金坤,等.预处理方式对再生砂及其胶砂性能的影响[J].混凝土与水泥制品,2025(2):101-106. CHENG H,HE Z,LIU J K,et al.Effect of pretreatment methods on the performance of recycled sand and its cement mortar[J].China Concrete and Cement Products,2025(2):101-106.

李国勇.改性橡胶颗粒对路面混凝土性能的影响[J].混凝土与水泥制品,2025(2):107-111. LI G Y.Effects of modified rubber particles on the performance of pavement concrete[J].China Concrete and Cement Products,2025(2):107-111.