...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Construction and Building Materials >Utilization of andesite processing wastewater treatment sludge as admixture in concrete mix
【24h】

Utilization of andesite processing wastewater treatment sludge as admixture in concrete mix

机译：以安山岩处理废水处理污泥为掺合料在混凝土中的利用

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

The dried physicochemical sludge from the coagulation-flocculation treatment of an andesite processing plant wastewater was used as concrete admixture in powder form. Various physicochemical sludges obtained with various coagulant/flocculants (alum, FeCl_3, and sepiolite) were experienced dry particulate (powder) form of the sludge was replaced at 0.5-1.5% w/w of the cement for 250 kg/m3 cement dosage. The admixture doses were complied with local standard. Slump tests were conducted on fresh concrete, and compressive strengths were measured for 7 and 28 days hardened concrete samples. Physical properties, namely freeze/thaw resistance, water absorption, capillary suction, void ratio and porosity were determined at the end of 28 days for the hardened concrete samples. The concrete consistency (slump) was improved up to 16-18 cm from 14.5 cm by the admixture. The best compressive strength was achieved with 0.5% w/w for admixtures. The admixture sludges obtained with organic flocculants were worse than the other admixtures. The structural changes after freeze/thaw tests were very close to the reference concrete (concrete without admixture); only the capilary suction had increased. The results confirmed that up to 0.5% of physicochemical sludge can be replaced with cement in concrete for use in certain non-load bearing structures that require medium strength concrete.
机译：将来自安山岩加工厂废水的混凝-絮凝处理的干燥的理化污泥用作粉末形式的混凝土外加剂。用各种凝结剂/絮凝剂（铝，FeCl_3和海泡石）获得的各种物理化学污泥经历了干燥颗粒（粉末）形式的污泥，以水泥250 kg / m3的剂量以0.5-1.5％w / w的水泥含量进行了替换。混合剂量符合当地标准。在新鲜混凝土上进行了坍落度测试，并测量了7天和28天硬化混凝土样品的抗压强度。在28天结束时确定了硬化混凝土样品的物理性能，即抗冻融性，吸水率，毛细吸力，空隙率和孔隙率。外加剂将混凝土的稠度（坍落度）从14.5厘米提高到16-18厘米。混合物的最佳抗压强度为0.5％w / w。用有机絮凝剂得到的掺混污泥比其他掺混物糟。冻融测试后的结构变化非常接近于参考混凝土（无掺合料的混凝土）。只有毛细吸力增加了。结果证实，在某些需要中等强度混凝土的非承重结构中，混凝土中的水泥可以替代高达0.5％的物理化学污泥。

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