...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Construction and Building Materials >Effects of natural zeolite on the fresh and hardened properties of self-compacted concrete
【24h】

Effects of natural zeolite on the fresh and hardened properties of self-compacted concrete

机译：天然沸石对自密实混凝土生硬性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study concerns the fresh and hardened properties of self-compacted concrete (SCC) with natural zeolite (NZ). SCC mixtures were prepared by inclusion of various amounts of NZ (0-20% by weight of cement) at different water/binder (.WIB) ratios. The fresh properties were investigated by slump flow, visual stability index, T_(50)), V-funnel and L-box. The slump flow and compressive strength changes with hauling time were also considered. The hardened properties were tested for compressive strength, splitting tensile strength, ultrasonic pulse velocity (UPV), initial and final absorption. Results showed that with the inclusion of NZ, SCC can be successfully produced with satisfactory performance in flowability, passing ability and viscosity. For all mixtures, flowability was lost with hauling time, although the rate of slump flow reduction was higher for mixes with higher amount of NZ. Regarding to hardened properties, the effect of NZ on the compressive and splitting tensile strength of SCC mixtures is generally related to its VV/B ratio. Moreover, compressive strength enhancement was seen for mixes with slump flow higher than 550 mm at prolonged mixing time. The UPV measurement shows that the effect of NZ on the UPV values at a high compressive strength are negligible. Compared to control SCC, absorption characteristics of SCC containing NZ significantly decrease with increasing ages.
机译：这项研究涉及具有天然沸石（NZ）的自密实混凝土（SCC）的新鲜和硬化性能。 SCC混合物是通过以不同的水/粘合剂（.WIB）比例加入各种量的NZ（水泥重量的0-20％）来制备的。通过坍落度流动，视觉稳定性指数，T_（50），V形漏斗和L形盒子研究了新鲜特性。还考虑了坍落度和抗压强度随运输时间的变化。测试了硬化性能的抗压强度，劈裂抗张强度，超声脉冲速度（UPV），初始和最终吸收。结果表明，通过加入NZ，可以成功地生产出具有良好流动性，通过能力和粘度的SCC。对于所有混合物，随着运输时间的流逝，流动性都会下降，尽管对于含大量NZ的混合物，坍落度降低的速度会更高。关于硬化性能，NZ对SCC混合物的抗压强度和劈裂抗张强度的影响通常与其VV / B比有关。此外，在延长的混合时间下，坍落度高于550 mm的混合物的抗压强度有所提高。 UPV测量表明，在高抗压强度下NZ对UPV值的影响可以忽略不计。与对照SCC相比，随着年龄的增长，含NZ的SCC的吸收特性显着降低。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号