为了解决传统高强砂浆难以同时满足大流动度、低收缩、高耐久性能等多性能协同问题，本文制备了一种大流动度、高强、高耐久砂浆，并对其工作性、力学性能、收缩和耐久性能进行了研究。结果表明：当钢纤维体积掺量为0.3%、轻砂掺量为10%、硫铝酸盐水泥（Sulphoaluminate cement，SAC）掺量为5%、粉煤灰掺量为25%、矿粉掺量为12%、微珠掺量为10%时，砂浆的综合性能最佳，表观密度达2 090 kg/m3，工作性优异，28 d抗压强度超60 MPa，90 d抗压强度超80 MPa，28 d劈裂抗拉强度较好，自收缩、干燥收缩均较低，抗氯离子渗透性能、气体渗透性能、抗冻性能均较好。本研究结果可为复杂服役环境下高性能砂浆的工程应用及多性能砂浆的配比优化提供参考。To resolve the issue that traditional high-strength mortar fails to achieve the multi-performance of high-fluidity, low-shrinkage and high-durability, this study prepared a high-fluidity, high-strength, and high-durability mortar, and tested its workability, mechanical properties, shrinkage, and durability. The results show that when the steel fiber volume content is 0.3%, the lightweight sand content is 10%, sulphoaluminate cement (SAC) content is 5%, fly ash content is 25%, mineral powder content is 12%, and microbead content is 10%, the mortar exhibits optimal overall performance. The apparent density reaches 2 090 kg/m3, with excellent workability. The 28-day compressive strength exceeds 60 MPa, and the 90-day compressive strength exceeds 80 MPa. The 28-day splitting tensile strength is relatively high, while both autogenous shrinkage and drying shrinkage are low. Additionally, the mortar demonstrates good resistance to chloride ion penetration, gas permeability, and frost resistance. The findings of this study provide valuable references for the engineering application of high performance mortar in complex service environments and the optimization of mix proportions for multi-performance mortar.

陆咸金,庞超明,龙令军.多性能协同优化高性能砂浆的制备与性能研究[J].混凝土与水泥制品,2026,53(4):22-28. LU X J,PANG C M,LONG L J.Preparation and performance study of high performance mortar with multi-performance collaborative optimization[J].China Concrete and Cement Products,2026,53(4):22-28 (in Chinese).

为协同优化SiO2气凝胶对水泥基材料强度、导热系数、干密度之间的性能制约关系，本文研究了不同SiO2气凝胶取代率（等体积取代河砂0、10%、20%、30%、40%、50%、60%）下水泥基材料的干密度、力学性能、保温隔热性能，并分析了其微观结构。结果表明：随着SiO2气凝胶取代率的增加，试件的干密度逐渐减小，导热系数显著降低，抗压、抗折强度显著降低；随着SiO2气凝胶取代率的增加，试件内部出现较为密集的微小孔洞，试件的孔隙率逐渐增加；当SiO2气凝胶取代率为60%时，水泥基材料28 d的抗压强度为5.68 MPa、干密度为1 136.99 kg/m3、导热系数为0.352 3 W/（m·K），综合性能最好。研究成果可为拓展建筑领域轻质高强低导热型保温隔热材料及工程优化提供借鉴。In order to synergistically optimize the interdependent constraints among strength, thermal conductivity, and dry density of cement-based materials by SiO2 aerogel, the dry density, mechanical properties, and thermal insulation performance of cement-based materials with varying SiO2 aerogel replacement rates (equivalent volume substitution of river sand: 0, 10%, 20%, 30%, 40%, 50%, and 60%) were investigated in this article, and their microstructures were analyzed. The results show that as the SiO2 aerogel replacement rate increases, the dry density of the specimens gradually decreases, the thermal conductivity significantly reduces, and the compressive and flexural strengths significantly decline. With the increase of the replacement rate of SiO2 aerogel, there are relatively dense micro pores in the specimen, and the porosity of the specimen gradually increases. When the replacement rate of SiO2 aerogel reaches 60%, the cement-based material exhibits a 28 d compressive strength of 5.68 MPa, a dry density of 1 136.99 kg/m3, and a thermal conductivity of 0.352 3 W/(m·K), showing the best overall performance. The research findings can provide references for expanding the application of lightweight, high-strength, low-thermal-conductivity insulation materials in the construction field and for engineering optimization.

周玉龙,张淑惠,刘江,等.SiO2气凝胶水泥基材料的性能研究[J].混凝土与水泥制品,2026,53(4):18-21,28. ZHOU Y L,ZHANG S H,LIU J,et al.Study on properties of SiO2 aerogel cement-based materials[J].China Concrete and Cement Products,2026,53(4):18-21,28 (in Chinese).