- 周 文1,2，周永祥1,3，宋普濤1,3，王祖琦1,3，王 晶1,3，馮 鵬2
引用本文摘 要：采用筒壓強度為3.72 MPa的低品位全珊瑚骨料配制LC30與LC50混凝土，針對低品位全珊瑚骨料混凝土28 d抗壓強度很難超過50 MPa的問題，開展了基于水膠比、骨料預濕和人工海水拌養的抗壓強度提升技術研究。結果表明：珊瑚骨料混凝土抗壓強度隨水膠比減小先增后減，水膠比0.20為極限水膠比，此時混凝土抗壓強度最高；預濕骨料對水膠比較大的LC30混凝土強度提升較小，對于低水膠比的LC50珊瑚骨料混凝土強度提升明顯；海水拌養有利于珊瑚骨料混凝土早期強度增長，但對28 d強度沒有顯著影響。 Abstract: LC30 and LC50 concrete were prepared with low-grade coral aggregate with a cylinder crushing strength of 3.72 MPa. Aiming at the problem that the 28 d compressive strength of low-grade coral aggregate concrete is difficult to exceed 50 MPa, the compressive strength improvement technology based on W/B, aggregate pre-wet and artificial seawater mixing is studied. The results show that the compressive strength of coral aggregate concrete first increases and then decreases with the decline of W/B and 0.20 is the limit of water-to-binder ratio with a highest compressive strength. The pre-wet aggregate has less influence on strength improvement for LC30 coral aggregate concrete with larger W/B, while the strength of LC50 coral aggregate concrete with low W/B is obviously improved. Artificial seawater mixing is beneficial to the early strength growth of coral aggregate concrete, but has no significant effect on 28 d compressive strength.
周文,周永祥,宋普濤,等.低品位全珊瑚骨料混凝土強度提升技術研究[J].混凝土與水泥制品,2019(4):1-3. ZHOU W,ZHOU Y X,SONG P T,et al.Research on Strength Improvement Technology of Low-grade Coral Aggregate Concrete[J].China Concrete and Cement Products,2019(4):1-3.