欢迎访问《中外公路》官方网站,今天是
分享到:
绿色建造下预拌混凝土原材料市场发展趋势
DOI:
CSTR:
作者:
作者单位:

1.湖南省第六工程有限公司;2.武汉理工大学 硅酸盐建筑材料国家重点实验室

作者简介:

通讯作者:

中图分类号:

TU521.1

基金项目:

1、科技部项目(编号:2017YFB0310105):超高层高强高抗裂预拌混凝土的制备与施工技术(国家十三五重点研发计划项目);2、湖南建设投资集团有限责任公司项目(编号:JGJTK2022-09):明挖作业全地下磁悬浮车站关键建造技术研究(2022年度科技计划项目)。


Development Trend on Raw Materials Market of Ready-mixed Concrete under Green Construction
Author:
Affiliation:

1.Hunan No. 6 Engineering CO.LTD;2.State Key Laboratory of Silicate Materials for Architectures

Fund Project:

1. Ministry of Science and Technology Project (No. : 2017YFB0310105) : Preparation and construction technology of super high-rise high-strength and high-crack resistant ready-mixed concrete (National 13th Five-Year Key Research and Development Plan project); 2. Project of Hunan Construction Investment Group Co., LTD. (No. : JGJTK2022-09) : Research on key construction technology of all-underground maglev station in open-dig operation (2022 annual science and Technology Plan Project).

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    面对泵送混凝土的传统原材料资源枯竭、生产过程能耗大、碳排放高、污染严重等情况以及我国土木工程行业实施绿色建造的大趋势,各种新的原材料逐渐被开发和推广,其质量、产量、社会认可度随着彼此的提高而提高。优质天然河砂和卵石在原产地供不应求,而老旧淤塞河道中尚可开采;使用大粒径天然卵石、石灰石、建筑垃圾等为原料生产的碎石和机制砂将成为新的替代品。水泥、粉煤灰、粒化高炉矿渣粉等原材料在生产企业转型升级并向交通便利地区集中建厂的同时也带来了平原、丘陵、山地等区域供应不均的问题,需根据施工所在地的供料情况就地取材。聚羧酸型缓凝高效减水剂以其高效、经济、相容性高、施工方便等优点已普及市场,还需进一步提升与机制砂等材料的适应性;而钙系和镁系膨胀剂对混凝土的补偿收缩需确保与混凝土收缩同步以控制收缩裂缝并避免结构胀裂。配制泵送混凝土需站在建筑全寿命期的高度考察和改进各种原材料的性能并充分发挥原材料之间的组合效应。

    Abstract:

    In the face of the depletion of traditional raw material resources of pumping concrete, high energy consumption in the production process, high carbon emissions, serious pollution and other conditions, as well as the general trend of China's civil engineering industry to implement green construction, a variety of new raw materials are gradually developed and promoted, and its quality, output, and social recognition are improved with each other. High quality natural river sand and pebbles are in short supply at the origin, while old silted river channels can still be mined. Gravel and machine-made sand produced using large particle size natural pebbles, limestone, construction waste, etc. as raw materials will become new substitutes. Cement, fly ash, granulated blast furnace slag powder and other raw materials in the transformation and upgrading of production enterprises and to the convenient transportation areas to build factories, but also brought the problem of uneven supply in plains, hills, mountains and other areas, need to be based on the construction of local materials supply situation. Polycarboxylic acid retarding superplasticizer has been popularized in the market due to its advantages of high efficiency, economy, high compatibility and convenient construction. The compensation shrinkage of concrete by calcium and magnesium expansion agents should be synchronized with concrete shrinkage to control shrinkage cracks and avoid structural expansion. The preparation of pumped concrete needs to investigate and improve the performance of various raw materials and give full play to the combined effect of raw materials at the height of the whole life of the building.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2024-01-17
  • 最后修改日期:2024-05-07
  • 录用日期:2024-06-03
  • 在线发布日期:
  • 出版日期:
文章二维码
网站二维码
期刊公众号