蒸压粉煤灰砖专用砂浆性能研究

通过对蒸压粉煤灰砖专用砂浆与普通砂浆进行对比试验,研究了龄期对专用砂浆强度的影响以及专用砂浆与蒸压粉煤灰砖的粘结性能和砌体抗剪切性能。结果表明,蒸压粉煤灰专用砂浆早期抗压强度高,7d抗压强度可达到28d抗压强度的50.7%,其保水性能好;该砂浆砌筑的蒸压粉煤灰砖28d砌体抗剪切强度为0.43MPa,明显高于普通砂浆抗剪切强度0.17MPa,可满足表面较光滑、易干燥收缩的蒸压粉煤灰砖砌筑的要求。

Study on the performance of special mortar for autoclaved fly ash brick

Through the contrastive tests on special mortar and normal mortar,the influence of special mortar age on strength,the bonding properties of autoclaved fly ash brick and the shear performance of masonry are researched in the article.The results show that the early compressive strength of the special mortar is high,and the compressive strength in 7 d can reaches 50.7 % of that in 28 d;the shear strength in 28 d is 0.43 MPa which higher than that of 0.17 MPa for normal mortar.The autoclaved fly ash brick can satisfy the requirement of masonry.