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HL-HGM高强无收缩灌浆料是一种高强度、无收缩、流动性大的灌浆材料,本文研究了不同水料比对灌浆料的流动度、泌水率、凝结时间、强度等性能的影响,简要介绍了产品在杭州湾跨海大桥50m简支箱梁支座安装中的应用,与环氧树脂砂浆灌浆相比,具有施工工艺简单,施工进度快,工程质量高,节约成本,环保等特点。 相似文献
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水泥基无收缩复合灌浆料的实验研究 总被引:1,自引:1,他引:1
通过采用硅酸盐水泥和铝酸盐水泥及适量其它材料复合制备高质量水泥基无收缩复合灌浆材料,并研究各组成材料对其性能的影响。试验结果表明,所研制的灌浆料具有大流动性、微膨胀、早强、高强及强度持续稳定增长等特点。 相似文献
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In this study, we examined non-shrinkage firing in the planar direction using low-temperature co-fired alumina (LTCA) containing a small quantity of Cu–Ti–Nb–Ag–O additive. A good restraint effect was obtained using AL-43-L alumina as a constraint layer whose particle diameter was several times larger (1 to 2 μm) than that of alumina in the LTCA material TM-5D (0.2 μm). The x-y shrinkage ratio of the non-shrinkage fired sample using AL-43-L as the constraint layer was within 2 %. However, the density of the non-shrinkage fired sample was much lower than that of the normal shrinkage fired sample. By producing a powder using a freeze-dry method, we obtained a well-sintered alumina with a relative density of approximately 95 % at 950°C, which is lower than the melting point of silver. That is, we achieved both suppression of the shrinkage rate in the x-y direction and ensured sinterability below the melting point of silver. The thermal conductivity of the sample was 16.2 W/mK, which is extremely high for low-temperature co-fired ceramics materials. 相似文献
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二重管无收缩双液注浆在饱和动态含水砂层浅埋暗挖隧道中的应用 总被引:1,自引:0,他引:1
阐述二重管无收缩双液注浆加固饱和动态含水砂层的加固机理及特点,并将其应用于广州地铁五号线珠江新城站~猎德站浅埋暗挖区间隧道饱和动态含水砂层段加固止水工程中.通过对注浆设计、注浆施工质量控制、注浆后开挖支护及注浆施工过程中常见问题进行研究,成功解决了浅埋暗挖隧道在饱和动态含水砂层中的施工难题. 相似文献
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依据大量的试验成果,阐明UHGM高强无收缩灌浆料是一种具有早强、高强、高流态、微膨胀和耐久性好等多种优点的新型复合材料.它是将流态混凝土、早强高强混凝土、膨胀混凝土和外加剂等多种混凝土技术综合运用. 相似文献
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利用超细钢渣微粉f-CaO、f-MgO的梯度水化特性,开发了一种外墙用快硬早强无收缩混凝土,解决了收缩开裂难题。快硬无收缩混凝土具有良好的流动性与填充性,不离析、不泌水,快硬早强,扩展度达到680mm以上,泌水率为0,12h抗压强度19.4MPa以上,不掺膨胀剂保证混凝土无收缩不开裂,24h竖向膨胀率0.42%以上。快硬早强无收缩混凝土制备的外墙板,180min耐火试验后,背火面平均温升34℃、最高温升39℃,未出现火焰。 相似文献
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