废瓷砖再生砌筑砂浆性能试验研究

将废瓷砖破碎成细集料,代替部分普通砂配制成废瓷砖再生砂,固定水泥、砂的用量比例与稠度制作砂浆试件,进行不同废瓷砖砂掺配率、不同养护时间下的强度试验和耐久性试验.试验结果表明:在同等条件下,掺配废瓷砖砂的再生砂浆较普通砂浆强度等级可提高1~2个级别,抗冻性能提高1倍以上;潜在的碱-硅酸反应危害小得多;且随着废瓷砖砂掺配率越高,砂浆抗压强度、抗折强度越高,后期抗冻性能越好,潜在的碱-硅酸反应越小.但普通砂浆后期具有收缩开裂的趋势,废瓷砖砂砂浆后期具有膨胀的趋势.

Performance study of recycled masonry mortar produced with reclaimed ceramic tiles

Waste ceramic tiles were broken into sandy gravel to configure reclaimed sand instead of part of normal sand. Strength tests and durability tests of mortar samples were carried out under different substitution rates of ceramic tile wastes sand in different curing time, which the ratio of cement and the consistency of mixture were fixed. The research results indicate that strength grade of masonry mortar recycled by ceramic tile wastes under different substitution rates can be improved 1~2 grades than common mortar, and the anti-frost property is improved by twice for the recycled mortar , and potential alkali silica reaction danger for recycled mortar is much smaller than that for common mortar. With the substitution rate of ceramic tile wastes sand increases, the strength increases, and anti-frost property increases at later period. At later stage, the common mortar has a tendency to arise shrinkage crack, while the recycled mortar has a tendency to arise swell crack.