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采用再生砂作为砂浆组成材料中的细骨料,掺入一定量的粉煤灰替代水泥制备干混砌筑砂浆,系统研究了粉煤灰掺量及胶砂比对其基本性能和力学性能的影响。结果表明,干混砌筑砂浆的分层度、表观密度和含气量与粉煤灰掺量及胶砂比均呈线性关系,并且其抗压强度随着胶砂比的减小而逐渐降低;当胶砂比为1∶3,且粉煤灰掺量为10%时,其后期抗压强度达到最高,相比早期增大幅度达65.9%;最后,根据再生骨料干混砌筑砂浆抗压强度与粉煤灰掺量的关系曲线回归拟合出不同胶砂比条件下砂浆的抗压强度公式,以制备M10~M30不同强度等级的干混砌筑砂浆。
Recycled sand was used as the fine aggregate in the mortar, and a certain amount of fly ash was used instead of cement to prepare dry-mix mortar. The effects of fly ash content and mortar ratio on its basic properties and mechanical properties influences. The results show that the gradation, apparent density and gas content of dry-mixed masonry mortar show a linear relationship with the content of fly ash and mortar, and the compressive strength decreases with the decrease of mortar-sand ratio ; When the ratio of mortar to sand is 1: 3, and the content of fly ash is 10%, the compressive strength reached the highest at the later stage, increasing by 65.9% compared with the early stage. Finally, according to the dry aggregate masonry Compressive strength and the content of fly ash curve regression fit the mortar under different mortar ratio compressive strength formula to prepare M10 ~ M30 different strength levels of dry mix mortar.