纤维编织网增强砂浆（TRM）加固是一种采用砂浆作为无机胶黏剂将纤维编织网粘贴于构件表面形成加固层的方法，其具有轻质高强、几乎不改变截面尺寸、耐高温性能和耐久性好等优点，近年来受到了广泛关注。TRM中的胶黏剂通常采用聚合物改性水泥砂浆，但水泥的生产能耗和碳排放量较大。为实现“双碳”目标，采用生产能耗和碳排放量远低于水泥而力学性能与水泥相近的地聚物取代水泥，形成纤维编织网增强地聚物砂浆（TRGM）加固法。采用碳纤维编织网增强地聚物砂浆加固钢筋混凝土双向板，开展不同长宽比和加固层数的TRGM加固板的抗弯性能试验和有限元分析，并与相应未加固板的性能进行比较，考察了TRGM的加固效果、双向纤维对承载力的贡献和传力机理。研究结果表明：TRGM加固能有效提高双向板的开裂后刚度和抗弯承载能力，抑制裂缝发展，尤其是沿短边方向的裂缝数量明显减少；双向板长宽比越大，TRGM的加固效果越明显；1层TRGM的加固效果受纤维编织网搭接以及施工质量的影响较大，使得其加固效率远低于2层TRGM加固的情况，纤维网的搭接可能会影响纤维强度的发挥，设计时应保证纤维有足够的搭接长度；加固板短向与长向承担的弯矩比在短向钢筋屈服后会逐渐降低，长向钢筋和纤维对承载力的贡献逐渐增大；随着跨中挠度增加，纤维承担的拉力占比呈现出先减后增再减的波浪形变化趋势。

Textile reinforced mortar (TRM) strengthening is a method of using mortar as an inorganic adhesive to stick textile onto the surface of components to form a strengthening layer. It has advantages such as light weight, high strength, minimal change in cross-sectional dimensions, good high-temperature resistance, and excellent durability, and thus has gained widespread attention in recent years. TRM typically uses polymer-modified cement mortar as the adhesive, but the production of cement has high energy consumption and carbon emissions. To achieve the “dual carbon” goals, this paper proposed to replace cement with geopolymer, which has much lower production energy consumption and carbon emissions while offering mechanical properties similar to cement, thus forming a textile reinforced mesh-enhanced geopolymer mortar (TRGM) strengthening method.This paper employed carbon textile reinforced geopolymer mortar to strengthen two-way reinforced concrete slabs. The flexural performance tests and finite element analysis were conducted on the unstrengthened and strengthened slabs with different aspect ratios and different numbers of TRGM layers. The strengthening effect of TRGM, the contribution of bidirectional fibers to bearing capacity, and the force transmission mechanism of the strengthened slabs were investigated. The results show that TRGM strengthening can effectively improve the post-cracking stiffness and flexural carrying capacity of two-way slabs and inhibit crack propagation, especially the widthwise cracks. The strengthening effect of TRGM increases with the increase in the aspect ratio of the two-way slabs. The bearing capacity of the strengthened slab with one layer of TRGM was greatly influenced by the overlap of the textile and strengthening construction quality, which made the strengthening efficiency of one layer of TRGM lower than that of two layers. The overlap of the fiber mesh may affect the strength of the fibers, and the design should ensure that the fibers have sufficient overlap length. After the widthwise reinforcement yielding, the ratio of bending moment borne in the widthwise direction to the lengthwise direction gradually decreased, since the contribution of the longitudinal reinforcement and fibers to the bearing capacity gradually increased. As the mid-span deflection increases, the proportion of tensile force borne by the fibers shows a wave-like trend, first decreasing, then increasing, and subsequently decreasing again.