玻纤网格布增强风积沙砂浆阻沙板性能试验

Performance evaluation of glass fiber mesh cloth-reinforced aeolian sand mortar blocking board

摘要:

为探究玻纤网格布对风积沙砂浆阻沙板的抗弯及抗冻性能的增强效果，基于不同的玻纤网格布规格、铺设层数以及冻融循环次数，开展弯曲和冻融循环试验。研究结果表明：风积沙砂浆阻沙板的开裂弯矩随玻纤网格布规格和铺设层数的增加而增大；玻纤网格布风积沙砂浆阻沙板的抗弯受力破坏主要有脆性破坏、脆性破坏+单裂缝柔性破坏、多裂缝柔性破坏三种类型；玻纤网格布风积沙砂浆阻沙板的表观形态随冻融循环次数的增加，其破坏逐渐加深；经25次冻融循环作用后，板材的质量损失率小于5 %，强度损失率小于25 %，满足冬寒夏热的实际工程环境使用要求。

Abstract:

In this study, the enhancement effect of glass fiber mesh cloth reinforcement on the flexural strength and frost resistance of aeolian sand mortar blocking board was evaluated. Flexural and freeze-thaw cyclic tests were conducted considering different parameters, i.e., varying specifications of glass fiber mesh cloth, reinforcement layers, and freeze-thaw cycles. The results show that the cracking moment of the developed aeolian sand mortar sand blocking plate increases with the size and number of layers of the glass fiber mesh. The resulting flexural failure of the blocking plate is primarily brittle failure, brittle failure + single crack flexible failure, and multi-crack ductile failure. The damage to the apparent morphology of the developed specimens gradually aggravated with the increasing number of freeze-thaw cycles. After 25 freeze-thaw cycles, the mass loss and strength loss rates of the plate specimens were found to be 5 % and <25 %, respectively, which meets the actual engineering requirements of winter cold and summer heat.