预应力混凝土管桩的混凝土配比研究 摘要： 预应力混凝土管桩的混凝土配合比设计应根据原材料品质、混凝土设计强度等级、混凝土耐久性以及生产工艺对工作性能的要求，通过选材、计算、试配、调整等步骤来确定，在此基础上制备不同型号的管桩，对其力学性能进行检测。 通过试配、调整，最终原材料选用42.5级普通硅酸盐水泥、缓凝高效减水剂、天然细砂与机制砂组成的混合砂、4～9.5mm粒级石子和9.5～26.5mm粒级石子双级配、S95磨细砂矿渣微粉。当选定砂率为39%、磨细砂掺入比例为25%时，松堆密度达到最大值1680 kg/m3，空隙率达到最小值21.1%。 按照此混凝土配合比实际生产出Φ300×70、Φ400×80、Φ500×100等管桩，经过力学检测，抗压强度和极限弯矩皆超过设计值，实测强度为93.1MPa，达到C90等级。 关键词： 管桩，混凝土，配合比，设计 |
Title 电分离Mix ratio design汽车天地 of prestressed concrete pile Abstract Mix ratio of prestressed concrete pile was designed, according to the quality of raw materials, the design intensity of concrete, concrete durability and the requirements of production process for performance. Through steps of selecting materials, calculating, attempting of mixing and regulation, a series of pipe were prepared. On the basis, its mechanical performance was tested. Through the test, the ordinary 42.5 levels of portland cement was finally selected. Other raw materials were selected as follows: polycarboxylic, natural sand combining artificial sand into mixed sand, 4~9.5mm size grading of the stones and 9.5~26.5mm size grading forming the two-stage distribution, and S95 sand slag. When the selected rate was 39% sand, mixing ratio of sand slag was 25%, the bulk density reached the maximum 1680 kg/m3, the gap ratio of concrete reached the minimum 21.1%. According to the concrete mix, the piles of Φ300×70, Φ400×80 and Φ500×100 were prepared. Through mechanical testing, the compressive strength and ultimate moment were more than the designed value, and the measuring strength was 93.1MPa, reached C90 levels. Keywords： pile, concrete, mix ratio, design |
本文发布于:2024-09-23 22:39:21，感谢您对本站的认可！
本文链接：https://www.17tex.com/xueshu/305005.html
版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系，我们将在24小时内删除。
| 留言与评论（共有 0 条评论） |
豫公网安备41160202000603
站长QQ:729038198
关于我们
投诉建议