摘   要：为了研究石灰石粉对矿渣水泥砂浆抗渗性能的影响，进行了不同掺量石灰石粉矿渣水泥砂浆的抗压强度、孔结构与水渗透系数试验，根据压汞法得到了砂浆的孔隙率和孔径分布，分析了石灰石粉对临界孔径和阈值孔径大小的影响，通过GEMS热力学模拟分析了不同石灰石粉掺量下的砂浆水化产物含量的变化，运用Katz-Thompson方程建立了特征孔径与水渗透系数之间的关系。结果表明：随着石灰石粉掺量的增加，砂浆的临界孔径减小，抗压强度降低；当石灰石粉掺量达到20%时，矿渣水泥砂浆的抗渗性能仍优于纯水泥砂浆组。 Abstract: In order to study the effect of limestone powder on the impermeability of slag cement mortar, tests were conducted on the compressive strength, pore structure, and water permeability coefficient of slag cement mortar with different contents of limestone powder. The porosity and pore size distribution of the mortar were obtained by mercury intrusion porosimetry, and the influence of limestone powder on the critical pore size and threshold pore size was analyzed. The changes in the hydration product content of the mortar under different contents of limestone powder were analyzed by GEMS thermodynamic simulation. The relationship between characteristic pore size and water permeability coefficient was established using the Katz Thompson equation. The results show that with the increase of limestone powder content, the critical pore size of mortar decreases and the compressive strength decreases. When the content of limestone powder reaches 20%, the impermeability of slag cement mortar is still better than that of pure cement mortar group.

蒋志律,杨涛,杨梦盈,等.掺石灰石粉矿渣水泥砂浆的孔结构与抗渗性能[J].混凝土与水泥制品,2024(10):79-83. JIANG Z Y,YANG T,YANG M Y,et al.Pore structure and impermeability of slag cement mortar mixed with limestone powder[J].China Concrete and Cement Products,2024(10):79-83.

摘   要：将多元固废微粉（粉煤灰、矿粉、石灰石粉、脱硫石膏）等质量部分替代水泥制备了混凝土，研究了石灰石粉掺量（0~15%）和脱硫石膏掺量（0~4%）对混凝土力学性能和抗碳化性能的影响，并分析了多元固废微粉的作用机理。结果表明：当石灰石粉掺量为4%且脱硫石膏掺量为2%时，试件的抗压和劈裂抗拉强度最大；当石灰石粉掺量为8%且脱硫石膏掺量为2%时，试件的抗碳化性能最好；石灰石粉在混凝土中能发挥成核、填充、化学和稀释作用；脱硫石膏可作为硫酸盐类激发剂激发粉煤灰、矿粉的火山灰活性，促进早期水化产物的生成。 Abstract: Concrete was prepared by partially replacing cement with multiple solid waste micro powder such as fly ash, mineral powder, limestone powder, and desulfurization gypsum. The effects of limestone powder content(0~15%) and desulfurization gypsum content(0~4%) on the mechanical properties and carbonation resistance of concrete were studied, and the mechanism of action of multiple solid waste micro powder was analyzed. The results show that when the content of limestone powder is 4% and the content of desulfurization gypsum is 2%, the compressive strength and splitting tensile strength of the specimen are the highest. When the content of limestone powder is 8% and the content of desulfurization gypsum is 2%, the carbonation resistance of the specimen is the best. Limestone powder can play a role in nucleation, filling, chemistry, and dilution in concrete. Desulfurized gypsum can be used as a sulfate activator to stimulate the volcanic ash activity of fly ash and mineral powder, promoting the generation of early hydration products.

庚利民,杜红秀,郭丛乔,等.多元固废微粉对混凝土性能的影响及机理分析[J].混凝土与水泥制品,2024(10):84-89. GENG L M,DU H X,GUO C Q,et al.Influence and mechanism analysis of multiple solid waste micro powders on properties of concrete[J].China Concrete and Cement Products,2024(10):84-89.

摘   要：将废弃贝壳制成再生粗、细骨料，研究了贝壳骨料等质量部分替代天然骨料对混凝土力学性能和抗氯离子渗透性能的影响，并依托福建泉港海岸修复工程，分析了掺贝壳骨料混凝土的固碳性能。结果表明：随着粗、细贝壳掺量的增加，试件的抗压、抗折和劈裂抗拉强度均先增大后减小；在粗贝壳掺量一定的情况下，增加细贝壳掺量对试件的抗氯离子渗透性能影响不大；当细贝壳掺量一定时，随着粗贝壳掺量的增加，试件的抗氯离子渗透性能下降；综合考虑力学性能和抗氯离子渗透性能，推荐粗、细贝壳的最佳掺量均为40%，据此可估算出福建泉港海岸修复工程中贝壳骨料生态贝藻礁可固碳1 657 t，可清理陆地堆积废弃贝壳0.035 km2，生态环境效益显著。 Abstract: The recycled coarse and fine aggregates were made from discarded shells, and the effects of partially replacing natural aggregates with shell aggregates on the mechanical properties and resistance to chloride ion penetration performance of concrete were studied. Based on the Fujian Quangang Coastal Restoration Project, the carbon fixation performance of concrete with shell aggregates was analyzed. The results show that with the increase of coarse and fine shell content, the compressive strength, flexural strength, and splitting tensile strength of the specimens first increase and then decrease. When the content of coarse shells is constant, increasing the content of fine shells has little effect on the resistance to chloride ion penetration performance of the specimens. When the content of fine shells is constant, the resistance to chloride ion penetration performance of the specimens decreases with the increase of the content of coarse shells. Taking into account the mechanical properties and resistance to chloride ion penetration performance, it is recommended that the optimal content for both coarse and fine shells be 40%. Based on this, it can be estimated that the shell aggregate ecological shell algae reef in the Fujian Quangang Coastal Restoration Project can fix 1 657 t of carbon and clean up 0.035 km2 of discarded shells accumulated on land, with significant ecological and environmental benefits.

詹帅,王俊杰,刘涛.掺贝壳骨料混凝土的性能及固碳效果研究[J].混凝土与水泥制品,2024(10):90-93,98. ZHAN S,WANG J J,LIU T.Study on performance and carbon fixation effect of concrete with shell aggregates[J].China Concrete and Cement Products,2024(10):90-93,98.

摘   要：探究了锂渣中的SO42-的溶出机制，通过质量损失率、强度和膨胀率试验，研究了锂渣掺量（0、10%、20%、30%）对水泥砂浆内部硫酸盐侵蚀反应的影响，并进行了XRD分析。结果表明：掺锂渣的砂浆试件中会产生大量SO42-，从而发生内部硫酸盐反应，生成侵蚀性产物AFt；随着龄期的增加，掺锂渣的砂浆试件内部硫酸盐反应在210 d时基本全部结束，且未造成试件开裂破坏，宏观表现为试件的后期强度和膨胀率基本稳定，质量损失率基本有所降低，建议锂渣掺量不大于30%。 Abstract: The dissolution mechanism of SO42- in lithium slag was investigated, and the effects of lithium slag content (0, 10%, 20%, 30%) on the internal sulfate attack reaction of cement mortar were studied through mass loss rate, strength, and expansion rate tests, and the XRD analysis was conducted. The results indicate that a large amount of SO42- is generated in the mortar specimens with lithium slag, leading to internal sulfate reactions and the formation of corrosive product AFt. As the age increases, the internal sulfate reaction of the mortar specimens with lithium slag is basically complete at 210 d, and no cracking or damage is caused to the specimens. Macroscopically, the later strength and expansion rate of the specimens are basically stable, and the mass loss rate is basically reduced. It is recommended that the lithium slag content should not exceed 30%.

陶进润,刘娜,张俊,等.锂渣对水泥砂浆内部硫酸盐侵蚀反应的影响[J].混凝土与水泥制品,2024(10):94-98. TAO J R,LIU N,ZHANG J,et al.Effect of lithium slag on internal sulfate corrosion reaction of cement mortar[J].China Concrete and Cement Products,2024(10):94-98.

摘  要：研究了黄金尾矿粉掺量（0、10%、20%、30%）对净浆流动度和强度的影响，并对净浆配合比进行了优化；在此基础上，研究了黄金尾矿粉掺量对混凝土坍落度和强度的影响。结果表明：黄金尾矿粉的掺入增大了净浆的流动度，但降低了强度，可通过适当降低水胶比的方式优化净浆配合比；优化后掺黄金尾矿粉净浆的流动度与对照组相当，且随着黄金尾矿粉掺量从10%增至30%，净浆试件的抗压强度逐渐增大；在混凝土坍落度基本相同的前提下，当黄金尾矿粉掺量为30%时，混凝土试件的28 d抗压强度较对照组仅降低了5.88%；当黄金尾矿粉掺量为10%时，混凝土试件的28 d劈裂抗拉强度相对最高。 Abstract: The effects of the content of gold tailings powder(0, 10%, 20%, 30%) on the fluidity and strength of cement paste were investigated, and the mix proportion of cement paste was optimized. On this basis, the effect of the content of gold tailings powder on the slump and strength of concrete was studied. The results show that, the incorporation of gold tailings powder increases the fluidity of cement paste, but reduces the strength, and the mix proportion of cement paste can be optimized by appropriately reducing the water-binder ratio. The fluidity of the cement paste with gold tailings powder is comparable to that of the control group after optimization, and with the increase of the content of gold tailings powder from 10% to 30%, the compressive strength of the cement paste specimen increases gradually. Under the premise that the slump of concrete is basically the same, when the content of gold tailings powder is 30%, the 28 d compressive strength of concrete specimens is only 5.88% lower than that of the control group. And when the content of gold tailings powder is 10%, the 28 d spliting tensile strength of concrete specimens is relatively highest.

胡瑶瑶,卜令来,王凯,等.掺黄金尾矿粉水泥基复合胶凝材料的制备及性能研究[J].混凝土与水泥制品,2024(10):99-103,110. HU Y Y,BU L L,WANG K,et al.Preparation and performance study of cement-based composite cementitious materials with gold tailings powder[J].China Concrete and Cement Products,2024(10):99-103,110.

摘   要：研究了玄武岩石粉替代率（10%、20%、30%）、粒径（0~75、75~150、150~180 μm）对高性能混凝土（HPC）强度的影响，并分析了作用机理。结果表明：用适量玄武岩石粉替代水泥可有效提升HPC试件的抗压、抗折强度，建议最佳掺量为20%；总体而言，相比粒径150~180 μm的玄武岩石粉，粒径0~75 μm、75~150 μm的玄武岩石粉对HPC试件抗压、抗折强度的提升效果更为显著；玄武岩石粉部分替代水泥对水化产物的种类没有影响，但会降低水化产物的衍射峰强度；适当增大玄武岩石粉的替代率能有效降低基体内部孔隙率，提高基体密实度，但增大玄武岩石粉的粒径则会降低水化产物的衍射峰强度，提高基体内部孔隙率，降低基体的密实度。 Abstract: The effects of substitution rate(10%, 20%, 30%) and particle size(0~75, 75~150, 150~180 μm) of basalt powder on strength of high performance concrete(HPC) were investigated, and the function mechanism was analyzed. The results show that, basalt powder can effectively improve the compressive and flexural strengths of HPC specimens by replacing cement with appropriate substitution rate, and the optimal content is recommended to be 20%. In general, compared with basalt powder with particle size of 150~180 μm, basalt powder with particle size of 0~75 μm and 75~150 μm has a better effect on the improvement of compressive and flexural strengths of HPC specimens. The basalt powder has no effect on the type of hydration product when replacing cement partially, but decreases the diffraction peak intensity of the hydration product. Appropriately increasing the substitution rate of basalt powder can effectively reduce the internal porosity of the matrix and improve the compactness of the matrix, but increasing the particle size of basalt powder decreases the diffraction peak intensity of the hydration product, improves the internal porosity of the matrix and decreases the compactness of the matrix.

周权,毛嘉熙,初晓明,等.玄武岩石粉高性能混凝土力学性能及微观结构研究[J].混凝土与水泥制品,2024(10):104-110. ZHOU Quan, MAO Jiaxi,CHU Xiaoming,et al.Study on mechanical performance and micro structure of basalt powder high performance concrete[J].China Concrete and Cement Products,2024(10):104-110.